Centaflex coupling

CENTAFLEX
COUPLING
Centaflex coupling
The CENTAFLEX is a coupling for
damping and absorbing vibrations and
shocks by using elasticity of rubber or
plastic, featuring high flexibility, low
noise, easy maintenance without
lubrication, simple construction and
long operating life. The appropriate
model can be selected from a large
variety of products.
■ Structure and Material
■CF-A
■CF-X
■CF-H
Flange hub material: FC200 or FCD450
Surface treatment: Phosphate coating
Screw material: SCM435
Surface treatment: Colored chromate treatment
Element material: Polyester resin
Element material: Nylon resin
Screw material: SCM435
Surface treatment: Colored chromate treatment
Flange hub material: FC200 or FCD450
Surface treatment: Phosphate coating
Surface treatment:
Colored chromate
treatment
Special correspondence:
Spline processing
Rubber body material: Natural rubber
Cylindrical hub material: S45C
Surface treatment: Phosphate coating
Screw material: SCM435
Surface treatment: Colored
chromate treatment
Insert material: Aluminum alloy
Cylindrical hub material: S45C
Surface treatment: Phosphate coating
Cylindrical hub material: S45C
Surface treatment: Phosphate coating
Centaflex
■CM (Available by special order)
■CF-B
Element material:
Polyurethane resin or polyester resin
Outer ring material: Aluminum casting
Insert material: Aluminum alloy
Screw material: SCM435
Surface treatment: Bright chromate
Cylindrical hub material: S45C
Surface treatment: Phosphate coating
Outer hub material: Equivalent of FCD450
Rubber body material: Natural rubber (NR)
Inner hub material: S45C
87
■ A list of CENTAFLEX COUPLING series
The CENTAFLEX couplings have linear torsional performance.
A wide choice of elements with different rubber hardness enables an optimal design.
Note: ●
◎ ○ △ ×
Existence (large) b]a Nonexistence (small)
[℃]
Permissible misalignment
Axial
displace
ment
Angular
misalignm
ent
Operational
temp.
Parallel
offset
Element
material
Oil
resistance
Model
Torsional
Transmitta
angle under
ble torque
rated
[N･m]
torque[°]
CF-A
10 ∼ 4000
3∼6
Natural
rubber
(NR)
Feature/Application
Vibrations and shocks are
absorbed.
High flexibility
High oil resistance
−30 ∼ ＋85
×
●
●
●
(Application)
Construction machinery, vessel,
generator, compressor, general
industrial machinery
CF-H
100 ∼ 2500
0.2 ∼ 0.3
Polyester
resin
−40 ∼ ＋120
●
○
△
●
Vibrations and shocks are
absorbed.
High heat resistance and oil
resistance
Easy to mount and dismount
(Application)
Construction machinery
CF-X
No backlash
High torsional stiffness, high
strength
Flexibility in the bending direction
15 ∼ 370
0.12
Nylon resin
−30 ∼ ＋90
●
△
△
○
(Application)
Compressor, machine tool, printing
machinery and general industrial
machinery
CF-B
2.5
Polyurethane
resin
Vibrations and shocks are
absorbed.
Axial insertion assembly
Simple construction
−40 ∼ ＋80
30 ∼ 1400
●
4
Polyester resin
●
○
○
(Application)
General industrial machinery,
engine/electric motor use and
pump
−40 ∼ ＋120
CM (Available by special order)
12
Natural
rubber (NR)
−30 ∼ ＋80
×
◎
△
●
(Application)
Vessel, construction machinery,
compressor and generator
88
Centaflex
120 ∼ 14000
Vibrations and shocks are
absorbed.
Flexible torsional stiffness prevents
resonances.
Direct mounting in flywheels is
possible.
CF-A
Generalpurpose
motor
Centaflex model A
Stepping
motor
Servo
motor
Detector
Engine
■Vibrations and shocks are absorbed
Elasticity-rich rubber transmits power and absorbs
vibrations and shocks. Noise of machinery is also reduced.
■Compactness
It is short in axial direction. Less space is needed.
■Excellent durability
A longer operating life is assured by the heat-resistance
rubber
and
rubber
precompressed
construction.
Maintenance is almost unnecessary.
■Mounting and dismounting
Rubber parts are available in two types, bolt mounted type (O0)
and bayonet mounted type (S0), in axial direction. Both
types allow easy centering.
It can be detached completely by removing the bolts.
Normal operating torque
[N・m]
Pilot bore/Additional machining range
[mm]
φ9 ∼ 130
Operational temp.
[℃]
−30 ∼ ＋85
Backlash
Max.
permissible
misalignment
Zero
Parallel offset
[mm]
Angular misalignment [°]
Axial displacement [mm}
■ Structure and Material
oh
■Type:
O0 (rubber body)
Aluminum insert A
Attachment of the aluminum
insert A and rubber
Rubber
Material: Natural rubber
It consists of polygon rubbers and
aluminum inserts inserted at the top. Each
part is completely adhered by vulcanizing.
Aluminum insert N
Centaflex
Attachment of the aluminum
insert R and rubber
■Configuration by type
Size 001, 002
89
Size 004, 008, 016
025, 030, 090
10 ∼ 4000
Size 012, 022, 028, 050
080, 140, 200, 250,400
0.5 ∼ 1.5
2∼3
±2 ∼ ±5
oh
■Type:
O2
Bolt (direction R)
The rubber body is automatically precompressed
by tightening the radial (direction R) bolts.
Spring pin
Cylindrical hub
Flange hub
Rubber body
Bolt (direction A)
Spring pin
■Type:
S2
Cylindrical hub
S bolt
Rubber body
Flange hub
Bolt
Spring pin
oh
■Type:
OG
Flange hub
Bolt (direction R)
Center hub
Floating shaft
Spring pin
Rubber body
Bolt (direction A)
Centaflex
oh
■Type:
OZ
Flange hub
Center flange
Bolt (direction R)
Stop ring
Center bearing
Center hub
Floating shaft
Bolt (direction A)
Rubber body
Spring pin
90
■ Specification
Torque
*
*
*
*
Model
Normal
[N･m]
Max.
[N･m]
Max. permissible
fluctuating torque
[N･m/10Hz]
CF-A-001
CF-A-002
CF-A-004
CF-A-008
CF-A-012
CF-A-016
CF-A-022
CF-A-025
CF-A-028
CF-A-030
CF-A-050
CF-A-080
CF-A-090
CF-A-140
CF-A-200
CF-A-250
CF-A-400
10
20
40
80
120
160
220
250
350
400
600
800
900
1400
2000
2500
4000
25
50
100
200
300
400
550
630
880
1000
1500
2000
2250
3500
5000
6250
10000
±4
±8
±16
±32
±48
±64
±88
±100
±140
±160
±240
±320
±360
±560
±800
±1000
±1600
Price
Max.
rotation
speed
[min−1]
Dynamic
torsional spring
constant
[N･m/rad]
Type
O0
Type
O1
Type
O2
Type
S0
Type
S1
Type
S2
Type
OG
Type
OZ
10000
8000
7000
6500
6500
6000
6000
5000
5000
4000
4000
4000
3600
3600
3200
3000
2800
1.47×102
2.92×102
7.59×102
1.44×103
4.38×103
3.28×103
8.26×103
4.12×103
1.05×104
6.40×103
1.48×104
2.17×104
1.37×104
2.90×104
6.08×104
8.28×104
1.25×105
-
-
-
-
-
-
-
-
The above specification is based on standard pars [Rubber material: NR (Natural rubber), rubber hardness: 60Hs].
Dynamic torsional spring constant (≒) static torsional spring constant x1.3
Refer to page 100 for permissible misalignment.
The indicated prices of types OG and OZ are applied up to L= 600mm.
Type O0, O1, O2
Model
CF-A-001
CF-A-002
CF-A-004
CF-A-008
CF-A-012
CF-A-016
CF-A-022
CF-A-025
CF-A-028
CF-A-030
CF-A-050
CF-A-080
CF-A-090
CF-A-140
CF-A-200
CF-A-250
CF-A-400
Moment of inertia [kg・m2]
Type S0, S1, S2
Moment of inertia [kg・m2]
Mass [kg]
Mass [kg]
O0
O1
O2
O0
O1
O2
S0
S1
S2
S0
S1
S2
2.5×10−5
1.3×10−4
2.8×10−4
7.6×10−4
8.3×10−4
2.5×10−3
2.7×10−3
4.2×10−3
4.6×10−3
1.1×10−2
1.2×10−2
1.5×10−2
3.8×10−2
4.2×10−2
7.8×10−2
0.14
0.24
5.8×10−5
2.5×10−4
5.4×10−4
1.6×10−3
1.8×10−3
4.3×10−3
4.8×10−3
8.5×10−3
9.6×10−3
2.1×10−2
2.3×10−2
2.6×10−2
6.7×10−2
7.4×10−2
0.14
0.24
0.44
1.3×10−4
6.3×10−4
1.3×10−3
3.7×10−3
3.9×10−3
1.1×10−2
1.1×10−2
2.1×10−2
2.2×10−2
4.7×10−2
5.0×10−2
5.4×10−2
0.15
0.16
0.30
0.50
0.97
0.08
0.2
0.2
0.3
0.3
0.7
0.7
0.8
1.0
1.5
1.7
2.3
3.2
3.7
5.5
7.8
11.5
0.3
0.5
0.6
1.3
1.3
2.3
2.4
3.6
3.8
6.0
6.3
7.6
11.8
12.6
17.8
24.5
37.6
0.5
1.1
1.5
3.0
3.1
5.5
5.6
8.5
8.7
13.8
14.2
15.5
26.1
26.8
39.4
52.3
85.0
1.9×10−5
1.2×10−4
2.6×10−4
7.2×10−4
7.6×10−4
2.4×10−3
2.6×10−3
4.0×10−3
4.3×10−3
1.0×10−2
1.1×10−2
1.5×10−2
3.6×10−2
3.8×10−2
7.5×10−2
0.14
0.22
6.0×10−5
2.8×10−4
5.8×10−4
1.8×10−3
2.0×10−3
4.7×10−3
5.4×10−3
9.2×10−3
1.1×10−2
2.2×10−2
2.5×10−2
2.9×10−2
7.1×10−2
7.9×10−2
0.15
0.25
0.49
1.4×10−4
6.6×10−4
1.4×10−3
3.9×10−3
4.1×10−3
1.1×10−2
1.2×10−2
2.2×10−2
2.3×10−2
4.9×10−2
5.2×10−2
5.6×10−2
0.16
0.17
0.32
0.50
1.00
0.07
0.1
0.2
0.3
0.3
0.6
0.7
0.8
0.9
1.4
1.7
2.3
3.1
3.4
5.3
7.0
10.7
0.3
0.5
0.7
1.4
1.4
2.5
2.6
3.8
4.0
6.3
6.8
8.1
12.4
13.3
18.5
24.5
39.5
0.5
1.1
1.5
3.1
3.2
5.6
5.8
8.7
8.9
14.2
14.6
16.0
26.6
27.5
40.1
52.3
86.9
Centaflex
* The above values are based on the cylindrical and flange hubs with pilot bores.
■ Ordering Information
CF - A - 001 - O2 - 13 60
Size
Type
O0, S0 : Rubber body only
OP, SP : O0, S0 + spring pi
OB, SB : O0, S0 + bolt
OC, SC : OB, SB + spring pi
O1, S1 : OC, SC + cylindrical hub O2, S2 : O1, S1 + flange hub
CF - A - 001 - OG - 13 60
Size
Type
OG, OZ : Floating shaft type
91
L=
Rubber material
13: NR natural rubber
Rubber hardness
60: 60Hs
50: 50Hs (Available by special order)
mm
Rubber material
13: NR natural rubber
Floating length
Refer to page 95 and 96.
Rubber hardness
60: 60Hs
50: 50Hs (Available by special order)
■ Static spring characteristics
■Torsional angle- Torque curve
■Bending angle- Moment curve
［N・m］
250
Size
3000
［N・m］
1000
200
2000
1000
140
250
080
200
050
090
028
022
030
140
080
050
008
090
028
030
100
Moment
Torque
012
025
016
100
Size
022
025
004
016
012
002
008
10
001
10
004
002
001
1
0
1
2
3
4
1
］
5 ［°
0
Torsional angle
1
］
3 ［°
2
Bending angle
■Shearing load- Deflection curve
■Axial load- Deflection curve
［N］
［N］
Size 250 200
4000
4000
Size
3500
250
200
080
140
080
3500
050
140
2500
090
028
022
2000
012
030
025
016
Axial load
Shearing load
050
3000
3000
2500
028
022
2000
1500
1000
1000
090
012
008
004
500
030
025
016
500
008
004
002
002
001
001
0
0
0
1
Deflection amount
2 ［mm］
0
1
2
3
4
5 ［mm］
Deflection amount
92
Centaflex
1500
■ Dimensions
■Type: O1
A
■Type: O2
A
A
φD
φN2
φN1
φD
φTK
φd1
φN1
φD
O
φTK
φN1
φd2
M1
M1
φd1
P
B
φTK
■Type: O0
G
E
G
G
M2
S
E
E
L1
CF-A-O0
M2
S
S
L2
L1
C
L3
CF-A-O1
CF-A-O2
■Bolt mounted type
Model
Centaflex
*
*
*
*
*
d1
d2
Unit [mm]
N1
N2
L1
L2
L3
A
B
C
E
G
O
P
S
TK M1=M2
22
30
36
46
46
56
56
65
65
80
80
80
95
95
110
56
85
100
120
120
150
150
170
170
200
200
205
260
260
300
30
40
45
60
60
70
70
85
85
100
100
100
125
125
145
36
45
55
70
70
85
85
100
100
120
120
120
140
140
160
32
30
34
40
40
52
52
58
58
68
68
80
84
84
94
24
28
30
42
42
50
50
56
56
66
66
66
80
80
90
58
62
68
86
86
108
108
120
120
142
142
150
172
172
192
24
24
28
32
32
42
42
46
46
58
58
65
70
70
80
7
8
8
10
10
12
12
14
14
16
16
16
19
19
19
34
34
38
44
44
58
58
64
64
76
76
84
92
92
102
22
20
24
28
28
36
36
40
40
50
50
61
62
62
72
11
10
12
14
14
18
18
20
20
25
25
30.5
31
31
36
5
14
18
20
20
25
25
26
26
33
33
33
46
46
46
18
12
17
20
20
24
24
26
26
35
35
35
45
45
45
2
4
4
4
4
6
6
6
6
8
8
4
8
8
8
44
68
80
100
100
125
125
140
140
165
165
165
215
215
250
40
120
340
160
180
100
100
208
85
19
108
77
22.5
54.5
60
60
8
M1＝4-M20
280 M2＝8-M20 CF-A26
40
130
370
170
200
125
125
260
105
29
135
95
28.5
70.5
66.5
67
10
M1＝4-M24
300 M2＝8-M20 CF-A28
Max.
Pilot bore
Max.
CF-A-001
CF-A-002
CF-A-004
CF-A-008
CF-A-012
CF-A-016
CF-A-022
CF-A-025
CF-A-028
CF-A-030
CF-A-050
CF-A-080
CF-A-090
CF-A-140
CF-A-200
8
10
12
12
12
15
15
15
15
20
20
20
30
30
35
19
28
30
38
38
48
48
55
55
65
65
65
85
85
105
8
9
11
15
15
19
19
19
19
28
28
28
30
30
35
CF-A-250
40
115
CF-A-400
40
115
2-M6
2-M8
3-M8
3-M10
4-M10
3-M12
4-M12
3-M14
4-M14
3-M16
4-M16
4-M16
3-M20
4-M20
4-M20
The above values indicate the dimensions when the rubber parts are assembled. Dimensions N1, TK and D before assembling the rubber parts differ from the values given above.
Dimension TK is the pitch diameter of bolts to mount flange hubs or mating parts.
When using hexagon socket head cap screws for CF-A-400, a special plain washer is required.
Eight bolts (2 bolts x 4 places) are required as radial bolts of CF-A-250 and 400.
Use CF-A-O2 data as CAD data.
93
CAD
file No.
D
Pilot bore
CF-A11
CF-A12
CF-A13
CF-A14
CF-A15
CF-A16
CF-A17
CF-A18
CF-A19
CF-A21
CF-A22
CF-A23
CF-A24
CF-A25
CF-A27
■Type: S1
M1
φD
φN2
φN1
φD
φTK
φd1
φN1
φD
φTK
φTS
B
O
φN1
A
M1
φTK
A
φd2
A
■Type: S2
φd1
■Type: S0
G
S
E
G
M2
G
M2
E
L1
CF-A-S0
S
E
L2
L1
S
C
L3
CF-A-S1
CF-A-S2
■Bayonet mounting type
Model
d1
d2
CAD
file No.
N1
N2
L1
L2
L3
A
B
C
E
G
O
S
TS
TK M1=M2
22
30
36
46
46
56
56
65
65
80
80
80
95
95
110
56
85
100
120
120
150
150
170
170
200
200
205
260
260
300
30
40
45
60
60
70
70
85
85
100
100
100
125
125
145
36
45
55
70
70
85
85
100
100
120
120
120
140
140
160
32
30
34
40
40
52
52
58
58
68
68
80
84
84
94
24
28
30
42
42
50
50
56
56
66
66
66
80
80
90
58
62
68
86
86
108
108
120
120
142
142
150
172
172
192
24
24
28
32
32
42
42
46
46
58
58
65
70
70
80
7
8
8
10
10
12
12
14
14
16
16
16
19
19
19
34
34
38
44
44
58
58
64
64
76
76
84
92
92
102
22
20
24
28
28
36
36
40
40
50
50
61
62
62
72
11
10
12
14
14
18
18
20
20
25
25
30.5
31
31
36
5
14
18
20
20
25
25
26
26
33
33
33
46
46
46
2
4
4
4
4
6
6
6
6
8
8
4
8
8
8
10
14
14
17
17
19
19
22
22
25
25
25
32
32
32
44
68
80
100
100
125
125
140
140
165
165
165
215
215
250
40
120
340
160
180
100
100
208
85
19
108
77
22.5
54.5
60
8
32
M1＝4-M20
280 M2＝8-M20 CF-AS16
40
130
370
170
200
125
125
260
105
29
135
95
28.5
70.5
66.5
10
45
M1＝4-M24
300 M2＝8-M20 CF-AS17
Max.
Pilot bore
Max.
CF-A-001
CF-A-002
CF-A-004
CF-A-008
CF-A-012
CF-A-016
CF-A-022
CF-A-025
CF-A-028
CF-A-030
CF-A-050
CF-A-080
CF-A-090
CF-A-140
CF-A-200
8
10
12
12
12
15
15
15
15
20
20
20
30
30
35
19
28
30
38
38
48
48
55
55
65
65
65
85
85
105
8
9
11
15
15
19
19
19
19
28
28
28
30
30
35
CF-A-250
40
115
CF-A-400
40
115
2-M6
2-M8
3-M8
3-M10
4-M10
3-M12
4-M12
3-M14
4-M14
3-M16
4-M16
4-M16
3-M20
4-M20
4-M20
CF-AS1
CF-AS2
CF-AS3
CF-AS4
CF-AS5
CF-AS6
CF-AS7
CF-AS8
CF-AS9
CF-AS10
CF-AS11
CF-AS12
CF-AS13
CF-AS14
CF-AS15
The above values indicate the dimensions when the rubber parts are assembled. Dimensions N1, TK and D before assembling the rubber parts differ from the values given above.
Dimension TK is the pitch diameter of bolts to mount flange hubs or mating parts.
＋0.15
Dimension TS indicates the basic dimension of H8 plug gauge. However, the tolerance is ( ＋0.1
) for size 002 and 004.
0 ) for size 001 and ( 0
When using hexagon socket head cap screws for CF-A-400, a special plain washer is required.
Eight bolts (2 bolts x 4 places) are required as radial bolts of CF-A-250 and 400.
Use CF-A-S2 data as CAD data.
94
Centaflex
D
Pilot bore
*
*
*
*
*
*
Unit [mm]
For low-speed rotation
L
L2
A
B
M2
G
φD
φN2
φR
φd2
M1
φTK
■Type: OG
* Dimension L is 1000mm or less in
standard length.
S
CF-A-OG
For high-speed rotation
■Type: OZ
T
L2
L
H
G
φD
φZ
φTK
φd2
φR
M2
φN2
B
A
M1
S
CF-A-OZ
Unit [mm]
Centaflex
CF-A-001
CF-A-002
CF-A-004
CF-A-008
CF-A-012
CF-A-016
CF-A-022
CF-A-025
CF-A-028
CF-A-030
CF-A-050
CF-A-080
CF-A-090
CF-A-140
*
*
*
*
*
d2
Max.
Pilot bore
8
9
11
15
15
19
19
19
19
28
28
28
30
30
22
30
36
46
46
56
56
65
65
80
80
80
95
95
D
N2
56
85
100
120
120
150
150
170
170
200
200
205
260
260
36
45
55
70
70
85
85
100
100
120
120
120
140
140
L
L2
A
B
H
R
T
G
S
TK
See next page for Type OZ.
Model
24
28
30
42
42
50
50
56
56
66
66
66
80
80
24
24
28
32
32
42
42
46
46
58
58
65
70
70
7
8
8
10
10
12
12
14
14
16
16
16
19
19
5
5
5
10
10
10
10
10
10
10
10
10
10
10
30
40
45
60
60
70
70
85
85
100
100
100
125
125
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
11
10
12
14
14
18
18
20
20
25
25
30.5
31
31
2
4
4
4
4
6
6
6
6
8
8
4
8
8
44
68
80
100
100
125
125
140
140
165
165
165
215
215
Dimension L of type OG is 1000mm or less in standard length.
For Dimension L of type OZ, refer to the graph of floating length on page 96.
For Dimension L of type OG and OZ, a space that is enough for mounting a M1 bolt is minimally required.
Use Type OG at 1000minー1 or less.
Consult Miki Pulley for design types and dimensions of CF-A-200-OG/OZ to CF-A-400-OG/OZ.
95
2
2
CAD file No.
Z
M1=M2
（H8）
For OG For OZ
52
80
95
115
115
145
145
165
165
195
195
195
250
250
2-M6
2-M8
3-M8
3-M10
4-M10
3-M12
4-M12
3-M14
4-M14
3-M16
4-M16
4-M16
3-M20
4-M20
CF-AG1
CF-AG2
CF-AG3
CF-AG4
CF-AG5
CF-AG6
CF-AG7
CF-AG8
CF-AG9
CF-AG10
CF-AG11
CF-AG12
CF-AG13
CF-AG14
CF-AZ1
CF-AZ2
CF-AZ3
CF-AZ4
CF-AZ5
CF-AZ6
CF-AZ7
CF-AZ8
CF-AZ9
CF-AZ10
CF-AZ11
CF-AZ12
CF-AZ13
CF-AZ14
■ Critical operating rotation speed of Type OZ
［min−1 ］
10000
9000
8000
7000
6000
5000
4000
Operating rotation speed
3000
2000
Size
090/140
1500
030/050/080
025/028
1000
900
016/022
800
008/012
700
600
004
500
002
400
001
300
Centaflex
200
200
500
1000
2000
3000 ［mm］
Floating length Ｌ
The vertical axis indicates operating revolution speed, and the horizontal axis indicates
floating length. The maximum operating floating length is determined by the operating
revolution speed.
96
■ Mounting example
■ For connecting an engine and drive
together with a universal joint
Flywheel
Hydraulic pump
Flywheel
■ For connecting an engine and pressure
pump
■ For connecting with a fluid (hydraulic)
coupling
■ For connecting with an electromagnetic clutch
■ For connecting an engine and propelling machinery as a marine intermediate
shaft
■ For connecting a blade of a wind power
generator and electric generator
Centaflex
97
■ Design check items
■Design of cylindrical and flange hubs
zMaterial
Size
Material
Tensile strength
Cylindrical hub
All size
Flange hub
001 ∼ 004
008 ∼ 250
S 45 C
FC 200
FCD 450
569N/mm or more
200N/mm2 or more
450N/mm2 or more
2
¡ The standard products are made of the materials shown on
the left.
¡ When newly designing cylindrical and flange hubs, use
materials which have strengths higher than those of the
standard products.
¡ The material of the CF-A-400 flange hubs is FCD450 or
S45C.
xDimensions of spring pin bores
Refer to the table below for the dimensions of spring pin bores of cylindrical and flange hubs (Sizes 008 or more).
Cylindrical hub
Flange hub (Flywheel side)
A1 A1
A2
φd drill
φd drill
Unit [mm]
Size
008
012
016
022
025
028
030
050
080
090
140
200
A1±0.1
d
Depth
Spring pin specification
10.0
10.0
13.5
13.5
14.0
14.0
18.0
18.0
18.0
22.5
22.5
22.5
4
4
5
5
5
5
5
5
5
8
8
8
5.5
5.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
13.0
13.0
13.0
6-φ4×8
8-φ4×8
6-φ5×10
8-φ5×10
6-φ5×10
8-φ5×10
6-φ5×10
8-φ5×10
8-φ5×10
6-φ8×16
8-φ8×16
8-φ8×16
* Spring pin bores are not needed on the cylindrical hub side of Sizes 250 and 400.
Unit [mm]
Size
008
012
016
022
025
028
030
050
080
090
140
200
250
400
A2±0.1
d
Depth
Spring pin specification
12
12
18
18
18
18
20
20
20
25
25
25
30
40
4
4
5
5
5
5
5
5
5
8
8
8
10
10
5.5
5.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
13.0
13.0
13.0
13.0
13.0
3-φ4×8
4-φ4×8
3-φ5×10
4-φ5×10
3-φ5×10
4-φ5×10
3-φ5×10
4-φ5×10
4-φ5×10
3-φ8×16
4-φ8×16
4-φ8×16
4-φ10×18
4-φ10×18
c Coupling of pump shaft (spline shaft) and a
cylindrical hub
Clamping screw
w Fixed spline
Design of clamping hubs to completely fix a cylindrical
hub and spline shaft by the center locking action is
available. Contact Miki Pulley for further information.
Clamping hubs are available by special order.
Centaflex
q Movable spline
Make sure to heat-treat (carburized hardening or other
process) the spline teeth of cylindrical hub. Contact Miki
Pulley concerning materials, heat treatment hardness, or
other items.
The rubber part of movable spline must always be Type O0.
Center-lock action of clamping hub
Recommended spline shaft fit class
Standard
JIS
SAE J498b
ANSI B92.1
Class of fit
Class b
Class 2
Class 5
98
■Bolt specification and tightening torque
Bolt specification
Size
Radial direction
All type
Class of
strength
001
002
004
008
012
016
022
025
028
030
050
080
090
140
200
250
Axial direction
Type O1,O2,OG
Type OZ
Tightening torque[N・m]
No. of bolts- nominal dia.x length under head No. of bolts- nominal dia.x length under head No. of bolts- nominal dia.x length under head
8.8 or more
10.9 or more
400
2-M6×10
2-M8×20
3-M8×25
3-M10×30
4-M10×30
3-M12×35
4-M12×35
3-M14×40
4-M14×40
3-M16×50
4-M16×50
4-M16×50
3-M20×65
4-M20×65
4-M20×65
8-M20×80
2-M6×25
2-M8×20
3-M8×25
3-M10×30
4-M10×30
3-M12×35
4-M12×35
3-M14×40
4-M14×40
3-M16×50
4-M16×50
4-M16×50
3-M20×65
4-M20×65
4-M20×65
4-M20×80
2-M6×30
2-M8×25
3-M8×30
3-M10×40
4-M10×40
3-M12×45
4-M12×45
3-M14×50
4-M14×50
3-M16×60
4-M16×60
4-M16×60
3-M20×75
4-M20×75
――
――
9 ∼ 11
24 ∼ 27
24 ∼ 27
49 ∼ 54
49 ∼ 54
85 ∼ 94
85 ∼ 94
130 ∼ 150
130 ∼ 150
210 ∼ 230
210 ∼ 230
210 ∼ 230
440 ∼ 490
440 ∼ 490
440 ∼ 490
440 ∼ 490
8-M20×100
4-M24×100
――
M20 440 ∼ 490
M24 850 ∼ 900
* Consult Miki Pulley when using bolts other than those specified above.
¡ The bolts conform to JIS B1176 hexagon socket head cap
screws and are treated by colored chromate and
microcapsule coating (slack preventive). Dedicated S bolts
are required as axial bolts used for Type S□. Refer to the
following figure and table on the right.
t
e
φd
M
S bolt dimensions
L1
B
L3
¡ Do not use any liquid anaerobic adhesive (screw lock agent).
It may damage the rubber parts.
Centaflex
■Operating environment
¡ Store the rubber parts in a cool and dry place avoiding direct
sunshine. If exposed to direct sunshine, the life of rubber
parts will be shortened. Provide suitable covers on the
rubber parts.
¡ The rubber parts are not fully resistant to oil and grease.
Avoid having the rubber parts contact oil or grease. If
contacted, wipe off immediately with alcohol or acetone.
¡ Store the bolts with microcapsule coating in a dry and airy
place. For not to degrade its performance, make sure not to
put any oil content.
99
M
Size
d
L1
L2
L3
t
B
e
001
002・004
008・012
016・022
025・028
030・050
080
10
14
17
19
22
24
24
32
42
46
7
8
10
12
14
31
32
42
54
60
5.0
6.0
9.0
9.0
10.5
5
6
8
10
12
5.9
7.0
9.4
11.7
14.0
M 6×1
M 8×1.25
M10×1.5
M12×1.75
M14×2
25
58
16
74
12.0
14
16.3
M16×2
32
70
20
90
14.0
17
19.8
M20×2.5
090・140
200・250
L2
Unit [mm]
* Size 400 uses a spacer method. S bolts are not used.
[Nominal dig. x pitch]
■Max. permissible misalignment
Centering must be below the Max. permissible misalignment of the table below.
Parallel offset
Angular
Axial displacement
[mm]
misalignment [°]
[mm]
Size
0.5
1.0
1.0
1.0
1.0
1.5
1.5
1.5
1.5
001
002
004
008
012
016
022
025
028
3
3
3
3
2
3
2
3
2
Size
030
050
080
090
140
200
250
400
±2
±3
±3
±4
±4
±5
±5
±5
±5
Parallel offset
Angular
Axial displacement
[mm]
misalignment [°]
[mm]
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
3
2
2
3
2
2
2
2
±5
±5
±4
±5
±5
±5
±5
±5
¡ If the rotation speed exceeds (1000min−1), parallel offset below 0.5mm and angular misalignment below 1°are recommended.
Parallel offset
Angular misalignment
Axial displacement
S1
θ
ε
φD
S
S2
θ＝sin−1
S2−S1
D
■Calculation of parallel offset and angular misalignment of Types OG and OZ
L
θ
ε
ε＝tanθ(L−2F)
Dimension F in this case is:
Type OG F= G+ S
Type OZ F= G+ S+ H
ε: Parallel offset of two shafts
θ: Coupling angular misalignment
L: Floating length
F
F
* Refer to the dimensional drawing on page 95 for each dimensional signs.
Type O□
Type S□
¡ Drive the spring pins into the cylindrical and flange hubs.
Mount the rubber part in the flange hub first and then
cylindrical hub. (Spring pins are used for Sizes 008 or more.)
¡ Drive the spring pins into the cylindrical hub and fix the S
bolts on the flange hub. Mount the rubber part in the
cylindrical hub first and then push them into the S bolts to
assemble. (Spring pins are used for Sizes 008 or more.)
100
Centaflex
■Assembling procedure
■Check items in assembly
q Tighten the bolts at the specified torque by using a torque
wrench when mounting the rubber parts in the cylindrical
Accurate mounting
and flange hubs. At this time, coat a little grease onto the
bearing surface of the bolt to achieve reliable tightening.
(Do not coat any grease on the screw part of the bolt.) In
addition, do not use liquid anaerobic adhesive (screw lock
agent). It may damage the rubber parts.
w When the rubber parts are mounted in the cylindrical hubs after
flange hubs, tighten the bolts while the cylindrical hubs are
fixed to avoid a deformation caused by the frictional force of the
bolt bearing surface.
Defective mounting
e When mounting the rubber parts in the cylindrical hubs,
screw in each bolt by two threads each and then tighten
completely.
r When assembly is finished, refer to the figure on the right to
reconfirm the mounting condition.
■ General-purpose motor specification and simplified selection
50Hz：3000min−1 / 60Hz：3600min−1
Bipolar (2-pole) motor
Centaflex
50Hz：1500min−1 / 60Hz：1800min−1
Quadrupolar (4-pole) motor
Centaflex
Frequency
[Hz]
Shaft dia.
[mm]
Torque
[N・m]
Model
Nominal
bore dia.
Shaft dia.
[mm]
Torque
[N・m]
Model
Nominal
bore dia.
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
14
14
19
19
24
24
24
24
28
28
38
38
38
38
42
42
42
42
42
42
48
48
55
55
55
55
55
55
1.3
1.1
2.4
CF-A-001
CF-A-001
CF-A-001
CF-A-001
CF-A-002
CF-A-002
CF-A-002
CF-A-002
CF-A-002
CF-A-002
CF-A-008
CF-A-008
CF-A-008
CF-A-008
CF-A-008
CF-A-008
CF-A-012
CF-A-008
CF-A-012
CF-A-012
CF-A-016
CF-A-012
CF-A-022
CF-A-016
CF-A-025
CF-A-022
CF-A-028
CF-A-025
14N
14N
19N
19N
24N
24N
24N
24N
28N
28N
38N
38N
38N
38N
42N
42N
42N
42N
42N
42N
48N
48N
55N
55N
55N
55N
55N
55N
14
14
19
19
24
24
28
28
28
28
38
38
38
38
42
42
42
42
48
48
48
48
55
55
60
60
60
60
2.6
2.2
4.9
4.1
9.7
8.1
CF-A-001
CF-A-001
CF-A-001
CF-A-001
CF-A-002
CF-A-002
CF-A-004
CF-A-004
CF-A-008
CF-A-004
CF-A-008
CF-A-008
CF-A-012
CF-A-008
CF-A-016
CF-A-012
CF-A-022
CF-A-016
CF-A-025
CF-A-022
CF-A-028
CF-A-022
CF-A-030
CF-A-028
CF-A-050
CF-A-030
CF-A-050
CF-A-050
14N
14N
19N
19N
24N
24N
28N
28N
28N
28N
38N
38N
38N
38N
42N
42N
42N
42N
48N
48N
48N
48N
55N
55N
60N
60N
60N
60N
Motor
Output
[kW]
0.4
0.75
1.5
2.2
3.7
5.5
7.5
11
Centaflex
15
18.5
22
30
37
45
2
4.9
4.1
7.1
6
12
10
18
15
24
20
36
30
49
41
60
50
71
59
97
81
120
100
146
122
* The above table indicates the adaptive sizes of couplings when used in general-purpose motor drives.
* The motor rotation speed and output torque indicates calculated values (reference values).
101
14
12
24
20
36
30
49
41
71
59
97
81
120
100
143
119
195
162
240
200
292
243
■ Standard bore processing specification
＋0.022
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
4
5
5
5
5
5
5
5
7
7
7
7
7
＋0.050
＋0.020
10
10
10
10
12
12
12
12
15
15
15
18
18
＋0.061
＋0.025
＋0.050
＋0.020
＋0.050
＋0.020
＋0.050
＋0.020
＋0.050
＋0.020
＋0.050
＋0.020
＋0.050
＋0.020
＋0.050
＋0.020
＋0.061
＋0.025
＋0.061
＋0.025
＋0.061
＋0.025
＋0.061
＋0.025
＋0.061
＋0.025
＋0.061
＋0.025
＋0.061
＋0.025
＋0.061
＋0.025
＋0.075
＋0.032
＋0.075
＋0.032
＋0.075
＋0.032
＋0.075
＋0.032
＋0.075
＋0.032
＋0.075
＋0.032
＋0.075
＋0.032
＋0.075
＋0.032
＋0.075
＋0.032
New JIS correspondence
＋0.3
0
―
Tolerance
―
―
―
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M6
2-M6
2-M6
2-M6
2-M6
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M10
2-M10
2-M10
2-M10
2-M10
―
―
―
13.5
16.0
17.0
18.0
19.0
20.0
21.0
22.0
25.0
27.0
28.0
31.0
33.0
35.5
38.5
41.5
43.5
45.5
48.5
51.5
53.5
60.0
61.0
65.0
69.0
71.0
12H
14H
15H
16H
17H
18H
19H
20H
22H
24H
25H
28H
30H
32H
35H
38H
40H
42H
45H
48H
50H
55H
56H
60H
63H
65H
New standard motor correspondence
Bore dia. Keyway Keyway Setscrew
width
height
bore
（d1-d2）（W1・W2）
（T1・T2） （M）
H7
―
―
―
12
14
15
16
17
18
19
20
22
24
25
28
30
32
35
38
40
42
45
48
50
55
56
60
63
65
4
5
5
5
5
6
6
6
6
8
8
8
8
＋0.030
0
10
10
10
12
12
14
14
14
16
16
18
18
18
＋0.036
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.018
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.021
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.025
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.3
0
―
―
―
―
―
―
―
13.8
16.3
17.3
18.3
19.3
20.8
21.8
22.8
24.8
27.3
28.3
31.3
33.3
35.3
38.3
41.3
43.3
45.3
48.8
51.8
53.8
59.3
60.3
64.4
67.4
69.4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M5
2-M5
2-M5
2-M5
2-M6
2-M6
2-M6
2-M6
2-M8
2-M8
2-M8
2-M8
2-M8
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
H9
―
―
―
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.030
0
＋0.036
0
＋0.036
0
＋0.036
0
＋0.036
0
＋0.036
0
＋0.036
0
＋0.043
0
＋0.043
0
＋0.043
0
＋0.043
0
＋0.043
0
＋0.043
0
＋0.043
0
＋0.043
0
＋0.043
0
＋0.043
0
Bore dia. Keyway Keyway Setscrew
width
height
bore
（d1-d2）（W1・W2）
（T1・T2） （M）
Tolerance
―
―
―
―
14N
G7, F7
―
―
―
―
14
―
―
―
―
5
＋0.024
＋0.006
―
―
―
―
19N
19
―
―
24
―
6
＋0.028
＋0.007
28
―
―
―
8
＋0.028
＋0.007
38
―
8
＋0.028
＋0.007
42
―
＋0.050
＋0.025
10
48
―
＋0.050
＋0.025
12
55
―
＋0.050
＋0.025
14
60
―
＋0.060
＋0.030
16
65
＋0.043
0
―
＋0.060
＋0.030
18
―
65N
＋0.043
0
―
―
60N
＋0.043
0
―
―
55N
＋0.036
0
―
―
48N
＋0.036
0
―
―
―
―
42N
＋0.036
0
―
―
―
―
38N
＋0.030
0
―
―
―
28N
＋0.030
0
―
―
―
―
―
―
24N
＋0.3
0
―
―
―
―
―
―
―
―
―
16.3
―
―
―
―
2-M4
―
―
―
―
21.8
―
―
2-M5
―
―
27.3
―
2-M6
―
31.3
―
―
―
2-M6
―
―
―
41.3
―
2-M8
―
45.3
―
2-M8
―
51.8
―
2-M10
―
59.3
―
2-M10
―
64.4
―
2-M10
―
69.4
2-M10
H9
―
―
―
―
＋0.043
0
―
＋0.060
＋0.030
18
＋0.043
0
* Below φ11 of New JIS correspondence and below φ11 of New standard motor correspondence have the same contents as Previous JIS correspondence (Second class).
■Distance from the edge surface of setscrew
Size
001
002
004
Distance [mm]
6
Cylindrical hub
008
016
030
012
022
050
025
080
028
7
10
11
090
140
200
250
400
001
002
004
13
6
7
Flange hub
008
016
012
022
025
028
9
10
030
050
080
090
140
200
250
400
15
16
102
Centaflex
10
11
12
14
15
16
17
18
19
20
22
24
25
28
30
32
35
38
40
42
45
48
50
55
56
60
63
65
E9
―
―
―
φd2
Nominal
bore dia.
9
10
11
12
14
15
16
17
18
19
20
22
24
25
28
30
32
35
38
40
42
45
48
50
55
56
60
63
65
H7, H8
9 ＋0.022
0
T2
φd1
Nominal
bore dia.
Nominal
bore dia.
Tolerance
W2
W1
Previous JIS (Second class) correspondence
Bore dia. Keyway Keyway Setscrew
width
height
bore
（d1-d2）（W1・W2）
（T1・T2） （M）
M
M
T1
¡ Bore processing is available upon
request. Products are stored with pilot
bores.
¡ Bores are machined based on the
following specification.
¡ Assign as described below when
ordering.
Ex) CF-A-050-02-1360 42N-50H
(d1) (d2)
¡ The positions of setscrews will not be on
the same plane.
¡ Spline machining is also available.
Contact us for further information.
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ103
o h
o h
Generalpurpose
motor
CF-H-O1・O2
Centaflex-H model
Stepping
motor
Servo
motor
Detector
Engine
■ Vibrations and shocks are absorbed
A polyester resin (Hytrel) that has elasticity like that of rubber
absorbs vibrations and shocks during power transmission.
■ Excellent resistance to environmental conditions
This material especially excels in resistance to heat, low
temperature and oil.
■ Excellent durability
A long operating life is assured by the polyester resin and
compressed torque transmission construction. Hub and spline
shaft are completely fixed by a clamping mechanism. No fretting of
wear is caused. Maintenance is almost never required.
■ Compactness
It is short in axial direction to save a space.
■ Easy mounting and dismounting
Input and output can be connected and disconnected easily
merely by moving axially.
Normal operating torque
Pilot bore/Additional machining range
Operational temp.
100 ∼ 2500
［N・m］
φ13 ∼ 115
［mm］
［℃］
−40 ∼ ＋120
Backlash
Max.
permissible
misalignment
Yes
Parallel offset
Angular misalignment
Axial displacement
0.3 ∼ 0.4
［mm］
［°］
0.5
［mm］
±3
■ Structure and Material
oh
■Type: O1
Bolt (Direction
Bush
Size: 008, 016
■ Element shapes of
each size
Bolt (Direction R)
Aluminum Insert R
Spring pin
Cylindrical hub
Size: 030∼240
Element
Material: Polyester resin
Centaflex
Bolt
(Direction A)
Size 008, 016
Aluminum Insert A
Spring pin
Size 030
Bolt (Direction R)
Aluminum Insert R
Element
Material: Polyester resin
Spring pin
Cylindrical hub
¡ Size 030 uses 3 bolts each.
■ Ordering information
Size 040, 050, 090
110, 160, 240
CF - H - 008 - O1
Size
103
Type
O0 : Element + aluminum insert (bush)
OP : O0 + Spring pin
O1 : OC + Cylindrical hub
OB : O0 + Bolt
O2 : O1 + Flange hub
OC : OB + Spring pin
P103_120_センフレ
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■ Specification
Torque
Normal
Max.
［N･m］
［N･m］
Model
100
200
400
600
800
950
1100
1600
2500
CF-H-008
CF-H-016
CF-H-030
CF-H-040
CF-H-050
CF-H-090
CF-H-110
CF-H-160
CF-H-240
200
400
800
1200
1600
1900
2200
3200
5000
9.4×10−4
3.0×10−3
9.2×10−3
6.9×10−3
1.2×10−2
1.5×10−2
2.3×10−2
3.6×10−2
1.02×10−1
CF-H-008
CF-H-016
CF-H-030
CF-H-040
CF-H-050
CF-H-090
CF-H-110
CF-H-160
CF-H-240
Angular
Axial displacement
misalignment ［°］
［mm］
0.3
0.3
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
Moment of inertia［kg・m2］
Type O0
Type O1
Type O2
Model
*
*
*
*
*
Max. permissible misalignment
Parallel offset
［mm］
1.8×10−3
4.9×10−3
1.9×10−2
1.3×10−2
2.3×10−2
2.6×10−2
3.7×10−2
7.0×10−2
1.78×10−1
Type O0
3.9×10−3
1.1×10−2
4.6×10−2
2.8×10−2
5.0×10−2
5.3×10−2
8.2×10−2
0.16
3.94×10−1
Max. rotation Dynamic torsional
speed
spring constant
［min−1］
［N・m/rad］
6500
5500
4000
4000
4000
4000
4000
3600
3000
±3
±3
±3
±3
±3
±3
±3
±3
±3
1.27×104
2.46×104
5.91×104
1.87×105
1.91×105
2.69×105
2.79×105
5.11×105
5.10×105
Mass［kg］
Type O1
Type O2
0.4
0.8
1.5
1.4
1.8
2.3
2.8
3.4
5.8
1.3
2.5
6.0
4.4
6.5
6.9
9.7
11.9
20.9
Type O0
Price
Type O1
Type O2
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
3.1
5.6
13.9
9.8
14.4
14.8
18.3
26.1
48.8
Dynamic torsional spring characteristics are non-linear. Dynamic torsional spring constant should be set at about 20 % of the rated torque or higher.
Dynamic torsional spring constant (≒) static torsional spring constant x 1.3
The values in moment of inertia and mass are based on the cylindrical and flange hubs with pilot bores.
As a basic mounting method, inlay alignment is suggested.
The indicated prices in Type O1 and O2 are applied to the cylindrical and flange hubs with pilot bores.
■ Dimensions
A
E
M2
E
L1
φD2
φTK
φN2
φd1
φN1
φD1
φTK
F
F
M2
B
φd2
M1
φd1
φN1
φD1
B1
A
M1
S
L1
S
L2
Centaflex
L3
C
CF-H-O1
CF-H-O2
Unit［mm］
Model
CF-H-008
CF-H-016
CF-H-030
CF-H-040
CF-H-050
CF-H-090
CF-H-110
CF-H-160
CF-H-240
d1
d2
D1
Pilot bore Max. Pilot bore Max.
12
15
20
22
20
20
25
30
40
38
48
65
50
65
65
63
85
115
15
19
28
22
28
28
28
30
40
46
56
80
65
80
80
80
95
120
125
155
205
175
205
215
225
270
330
D2
N1
N2
L1
L2
L3
A
B
B1
C
E
F
S
TK M1=M2
120
150
200
180
200
200
230
260
320
60
70
100
85
100
100
100
125
160
70
85
120
100
120
120
120
140
180
40
52
68
58
68
68
68
84
100
42
50
66
56
66
66
66
80
100
88
110
144
124
144
144
144
177
213
32
41
56
50
56
56
56
59
65
10
12
16
16
16
16
18
19
19
10
12
15
16
15
15
18
20
20
46
60
78
68
78
78
78
97
113
25
34
46
42
46
46
46
48
54
20
26
35
31
35
35
35
37
40
6
8
10
10
10
10
10
13
13
100
125
165
140
165
165
180
215
260
3-M10
3-M12
3-M16
4-M16
4-M16
4-M16
4-M18
4-M20
4-M20
* Dimension TK will be the pitch diameter of bolts to mount flange hubs or mating parts.
104
P103_120_センフレ
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■ Design check items
■Design of cylindrical and flange hubs
zMaterial
Size
Cylindrical hub
Flange hub
Material
Tensile strength
S 45 C
FCD 450
569N/mm2 or more
450N/mm2 or more
All size
All size
¡ The standard products are made of the materials shown on the
left.
¡ When newly designing cylindrical and flange hubs, use
materials which have strengths higher than those of the
standard products.
¡ A material strength shortage on the flywheel side can be
solved by changing the bolt length. Contact us for further
information.
xDimensions of spring pin bores
Refer to the table below for the dimensions of spring pin bores of cylindrical and flange hubs (Sizes 016 or more).
Cylindrical hub
Flange hub (Flywheel side)
A1 A1
A2
φd drill
φd drill
Unit［mm］
Size
016
030
040
050
090
110
160
240
A1±0.1
d
Depth
13.5
18.0
14.0
18.0
18.0
18.0
17.5
20.0
5
5
5
5
5
5
8
8
6.5
6.5
6.5
6.5
6.5
6.5
13.0
13.0
Spring pin specification
6-φ5×10
6-φ5×10
8-φ5×10
8-φ5×10
8-φ5×10
8-φ5×10
8-φ8×16
8-φ8×16
Unit［mm］
Size
030
040
050
090
110
160
240
A2±0.1
d
Depth
Spring pin specification
20
17
20
20
5
5
5
5
5
8
8
6.5
6.5
6.5
6.5
6.5
13.0
13.0
3-φ5×10
4-φ5×10
4-φ5×10
4-φ5×10
4-φ5×10
4-φ8×16
4-φ8×16
17.5
25
30
* Spring pin bores are not needed on the cylindrical hub side of Size 016.
c Coupling of pump shaft (spline shaft) and a
cylindrical hub
Clamping screw
Design of clamping hubs to completely fix a cylindrical hub
and spline shaft by the center locking action is available.
Contact Miki Pulley for further information. Clamping hubs
are available by special order.
Centaflex
Recommended spline shaft fit class
Standard
JIS
SAE J498b
ANSI B92.1
105
Class of fit
Class b
Class 2
Class 5
Center-lock action of clamping hub
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ106
■Bolt and clamping screw specification and tightening torque
Size
Class of
strength
008
016
030
040
050
090
110
160
240
Bolt specification
Radial direction
Axial direction
No. of bolts- nominal dia. x length under head
No. of bolts- nominal dia. x length under head
3-M10×30
3-M12×35
3-M16×50
4-M16×45
4-M16×50
4-M16×50
4-M18×55
4-M20×50
4-M20×65
3-M10×30
3-M12×35
3-M16×50
4-M16×45
4-M16×50
4-M16×50
4-M18×55
4-M20×50
4-M20×65
8.8 or more
10.9 or more
Tightening
torque ［N・m］
Clamping screw
No. of boltsTightening
nominal dia.
torque ［N・m］
49 ∼ 54
85 ∼ 94
210 ∼ 230
210 ∼ 230
210 ∼ 230
210 ∼ 230
310 ∼ 330
440 ∼ 490
440 ∼ 490
2-M10
2-M12
2-M16
2-M16
2-M16
2-M16
2-M16
2-M20
2-M20
25 ∼ 30
40 ∼ 50
100 ∼ 120
100 ∼ 120
100 ∼ 120
100 ∼ 120
100 ∼ 120
200 ∼ 220
200 ∼ 220
* The bolts conform to JIS B1176 hexagon socket head cap screws and are treated by colored chromate and microcapsule coating (slack preventive).
* The clamping screws conform to JIS B1177 hexagon socket setscrews.
* Consult Miki Pulley when using bolts other than those specified above.
■Operating environment
Store the bolts with microcapsule coating in a dry and airy place.
For top performance, do not oil bolts.
■Assembling procedure
q Drive the spring pins into the cylindrical hub (except the size 008) and fix the aluminum insert R on the cylindrical hub.
w Mount the cylindrical hub in a spline shaft and fix them by tightening the clamping screws.
<When center lock is used>
e a. For Sizes 008 and 016
Fix the bushes on the flange hub
(flywheel side), then push the element
into the cylindrical hub.
Clamping screw
b. For Sizes 030, 040, 050, 090, 110, 160
Clamping screw
and 240
Drive the spring pins into the flange
hub
(flywheel
side).
Attach
the
Centaflex
aluminum insert A to the element
and fix them on the flange hub
(flywheel side).
r Integrate each component by moving the drive or the driven parts in the axial direction.
■Check items in assembly
■Bore processing
Tighten the bolts at the specified torque by using a torque
The cylindrical and flange hubs are stored with pilot bores.
wrench when mounting the rubber parts in the cylindrical and
Bore processing is available upon request. For the standard
flange hubs. At this time, coat a little grease onto the bearing
bore processing specification, refer to page 102. Contact us
surface of the bolt to achieve a reliable tightening. (Do not coat
also for an involute spline bore processing.
any grease on the screw part of the bolt.)
106
P103_120_センフレ
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o h
o h
Generalpurpose
motor
CF-X-O1・O2
Centaflex-X model
Stepping
motor
Servo
motor
Detector
Engine
■ High rigidity/High strength
High-quality special plastic material (Zeitel) is used for the
cushioning material. It is hard in a torsional direction and has
excellent flexibility in bending and axial directions. Maintenance is
almost unnecessary.
■ Compactness
It is shorter in axial direction to save a space.
■ Easy dismounting
Removing the axial bolts separates power completely. The type OG
can be detached without moving the drive by removing axial
bolts.
■Uniform rotation with zero backlash
Constant-velocity rotation without backlash is ensured.
Normal operating torque
15 ∼ 370
［N・m］
Pilot bore/Additional machining range
Operational temp.
φ9 ∼ 65
［mm］
［℃］
−30 ∼ ＋90
Backlash
Max.
permissible
misalignment
Zero
Parallel offset
0.1
［mm］
Angular misalignment
Axial displacement
1
［°］
±0.5
［mm］
■ Structure and Material
¡ The element is fixed between the cylindrical and flange hubs by bolts. Motive power is transmitted through the element.
Element material: Nylon resin
Bolt (Direction A)
Element
Centaflex
Cylindrical hub
Flange hub
reatment
Bolt (Direction R)
Flange hub material: FC200 or FCD450
Surface treatment: Phosphate coating
Screw material: SCM435
Surface treatment: Colored
chromate treatment
Cylindrical hub material: S45C
Surface treatment: Phosphate coating
■ Ordering information
CF - X - 008 - O1
Size
107
Type
O0 : Element only
OB : O0 + bolts
O1 : OB + cylindrical hub
O2 : 01 + flange hub
OG : Floating shaft type
P103_120_センフレ
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■ Specification
Torque
Model
Normal Max.
［N･m］［N･m］
15
30
60
120
240
370
CF-X-001
CF-X-002
CF-X-004
CF-X-008
CF-X-016
CF-X-025
*
*
*
*
Max. permissible misalignment
Parallel
offset
［mm］
30
60
120
250
500
800
0.1
0.1
0.1
0.1
0.1
0.1
Angular
Axial
misalignment displacement
［°］
［mm］
1
1
1
1
1
1
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
Max.
rotation
speed
［min−1］
Static torsional
spring constant
(at 20℃)
［N・m/rad］
10000
10000
3.0×103
6.0×103
2.3×104
5.8×104
1.1×105
1.7×105
8000
7000
6000
5000
TypeO2
Moment of
Mass Type
inertia
［kg］ O0
［kg・m2］
1.22×10−4
5.74×10−4
1.19×10−3
3.49×10−3
9.20×10−3
1.83×10−2
0.5
0.9
1.4
2.9
5.0
7.9
Price
―
―
―
―
―
―
Type
O1
Type
O2
Type
OG
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
The values in moment of inertia and mass are based on the cylindrical and flange hubs with pilot bores.
If the rotation speed exceeds (2000minー1), misalignment must be less than 50% of the specification.
The indicated prices in Type O1 and O2 are applied to the cylindrical and flange hubs with pilot bores.
The indicated prices of type OG are applied up to L= 600mm.
■ Dimensions
L
A
φｄ2
S1
G
E
L1
B
φR
φＮ２
φＴＫ
φＤ２
φｄ２
φＮ２
φｄ1
M1
G
M2
E
S
L2
φＤ１
B
φＤ１
φＮ１
φｄ１
A
φＴＫ
φＤ２
L2
M1
S1
S
L3
CF-X-O2
CF-X-OG
Unit［mm］
Model
d2
8
10
12
12
15
15
19
26
30
38
48
55
8
9
11
15
19
19
22
30
36
46
56
65
D1
D2
N1
N2
L1
L2
L3
A
B
E
G
S
57
88
100
125
155
175
56
85
100
120
150
170
30
40
45
60
70
85
36
45
55
70
85
100
32
30
34
40
52
58
24
28
30
42
50
56
57
62
24
24
25
30
35
40
7
8
8
10
12
14
18
20
21
26
28
34
11
10
12
14
18
20
3
4
4
4
7
6
66.5
85
105
117
S1 M1=M2
1
4
2.5
3
3
3
2-M6
2-M8
3-M8
3-M10
3-M12
3-M14
R
TK
CAD
file No.
30
40
45
60
70
85
44
68
80
100
125
140
CF-X1
CF-X2
CF-X3
CF-X4
CF-X5
CF-X6
* Dimension L of Type OG must be 1000mm or less and the rotation speed must be (2000min-1) or less.
* CAD data is the data for CF-X-02.
108
Centaflex
CF-X-001
CF-X-002
CF-X-004
CF-X-008
CF-X-016
CF-X-025
d1
Pilot bore Max. Pilot bore Max.
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ109
■ Design check items
■Misalignment
Angular misalignment (θ)
■ Calculation of parallel offset and angular
misalignment of Type OG
Parallel offset (ε)
Axial displacement (S)
L
θ
ε
ε
θ
F
F
ε＝tanθ(L−2F)
F＝G＋S1
ε: Parallel offset of two shafts
θ: Coupling angular misalignment
L: Floating length
S
Calculate the parallel offset of Type OG by the formula above.
* Refer to the dimensional drawing on page 108 for each
dimensional signs.
■Assembling procedure
e Pull up the cylindrical hub a
Tighten the bolts at the specified torque by using a torque
little bit and tighten Direction R
wrench when mounting the rubber parts in the cylindrical and
bolts to attach the element to
flange hubs. At this time, coat a little grease onto the bearing
the cylindrical hub.
surface of the bolt to achieve a reliable tightening. (Do not coat
any grease on the screw part of the bolt.)
q Insert the cylindrical hub into
When assembly is finished, refer to the figure below to
the inlay part of the flange
reconfirm the mounting condition.
hub to adjust centering of the
coupling.
Accurate mounting
Defective mounting
w Tighten Direction-A bolts
to attach the element to
the flange hub while the
cylindrical hub is
mounted in the inlay part
of the flange hub.
■Operating environment
Centaflex
¡ If exposed to direct sunshine, the life of the element may be
shortened. Provide a suitable cover.
¡ The element excels in oil, yet excessive attachment
degrades its performance. Avoid having the element contact
oil.
■Bolt specification and tightening torque
Bolt
Size
Radial direction
Axial direction
Nominal designation No. of bolts Nominal designation No. of bolts
001
002
004
008
016
025
M6×10
M8×20
M8×25
M10×30
M12×35
M14×40
2
2
3
3
3
3
M6×25
M8×20
M8×25
M10×30
M12×35
M14×40
2
2
3
3
3
3
Tightening
torque
［N・m］
9 ∼ 11
24 ∼ 27
24 ∼ 27
49 ∼ 54
85 ∼ 94
130 ∼ 150
* The bolts conform to JIS B1176 hexagon socket head cap screws and are treated by colored chromate and microcapsule coating (slack preventive).
109
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ110
■ Standard bore processing specification
W1
W2
M
ﾟ
M
T2
T1
90
φｄ１
W2
M
M
T1
W1
φｄ２
T2
¡ Bore processing is available upon request. Products
are stored with pilot bores.
¡ Bores are machined based on the following
specification.
¡ Assign as described below when ordering.
Ex) CF-X-008-02 19N-20H
(d1) (d2)
¡ The positions of setscrews will not be on the same
plane.
φｄ１
φｄ２
Unit［mm］
Previous JIS (Second class) correspondence
＋0.3
0
E9
―
―
―
4 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
10 ＋0.061
＋0.025
10 ＋0.061
＋0.025
10 ＋0.061
＋0.025
10 ＋0.061
＋0.025
12 ＋0.075
＋0.032
12 ＋0.075
＋0.032
12 ＋0.075
＋0.032
12 ＋0.075
＋0.032
15 ＋0.075
＋0.032
15 ＋0.075
＋0.032
15 ＋0.075
＋0.032
18 ＋0.075
＋0.032
18 ＋0.075
＋0.032
―
―
―
13.5
16.0
17.0
18.0
19.0
20.0
21.0
22.0
25.0
27.0
28.0
31.0
33.0
35.5
38.5
41.5
43.5
45.5
48.5
51.5
53.5
60.0
61.0
65.0
69.0
71.0
―
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M6
2-M6
2-M6
2-M6
2-M6
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M10
2-M10
2-M10
2-M10
2-M10
Keyway Keyway Setscrew
Bore dia
width
height
bore
（d1-d2）
（W1・W2）
（T1・T2） （M）
Tolerance
―
―
―
12H
14H
15H
16H
17H
18H
19H
20H
22H
24H
25H
28H
30H
32H
35H
38H
40H
42H
45H
48H
50H
55H
56H
60H
63H
65H
H7
―
―
―
12 ＋0.018
0
14 ＋0.018
0
15 ＋0.018
0
16 ＋0.018
0
17 ＋0.018
0
18 ＋0.018
0
19 ＋0.021
0
20 ＋0.021
0
22 ＋0.021
0
24 ＋0.021
0
25 ＋0.021
0
28 ＋0.021
0
30 ＋0.021
0
32 ＋0.025
0
35 ＋0.025
0
38 ＋0.025
0
40 ＋0.025
0
42 ＋0.025
0
45 ＋0.025
0
48 ＋0.025
0
50 ＋0.025
0
55 ＋0.030
0
56 ＋0.030
0
60 ＋0.030
0
63 ＋0.030
0
65 ＋0.030
0
H9
―
―
―
4 ＋0.030
0
5 ＋0.030
0
5 ＋0.030
0
5 ＋0.030
0
5 ＋0.030
0
6 ＋0.030
0
6 ＋0.030
0
6 ＋0.030
0
6 ＋0.030
0
8 ＋0.036
0
8 ＋0.036
0
8 ＋0.036
0
8 ＋0.036
0
10 ＋0.036
0
10 ＋0.036
0
10 ＋0.036
0
12 ＋0.043
0
12 ＋0.043
0
14 ＋0.043
0
14 ＋0.043
0
14 ＋0.043
0
16 ＋0.043
0
16 ＋0.043
0
18 ＋0.043
0
18 ＋0.043
0
18 ＋0.043
0
＋0.3
0
―
―
―
13.8
16.3
17.3
18.3
19.3
20.8
21.8
22.8
24.8
27.3
28.3
31.3
33.3
35.3
38.3
41.3
43.3
45.3
48.8
51.8
53.8
59.3
60.3
64.4
67.4
69.4
―
―
―
―
2-M4
2-M4
2-M4
2-M4
2-M4
2-M5
2-M5
2-M5
2-M5
2-M6
2-M6
2-M6
2-M6
2-M8
2-M8
2-M8
2-M8
2-M8
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
Tolerance
―
―
―
―
14N
―
―
―
―
19N
―
―
24N
―
28N
―
―
―
38N
―
42N
―
48N
―
55N
―
60N
―
65N
Keyway Keyway Setscrew
Bore dia
width
height
bore
（d1-d2）
（W1・W2）
（T1・T2） （M）
G7, F7
―
―
―
―
14 ＋0.024
＋0.006
―
―
―
38 ＋0.050
＋0.025
H9
―
―
―
―
5 ＋0.030
0
―
―
―
―
6 ＋0.030
0
―
―
8 ＋0.036
0
―
8 ＋0.036
0
―
―
―
10 ＋0.036
0
―
42 ＋0.050
＋0.025
―
12 ＋0.043
0
―
48 ＋0.050
＋0.025
―
14 ＋0.043
0
―
55 ＋0.060
＋0.030
―
16 ＋0.043
0
―
60 ＋0.060
＋0.030
―
18 ＋0.043
0
―
65 ＋0.060
＋0.030
―
18 ＋0.043
0
―
―
―
―
19 ＋0.028
＋0.007
―
―
24 ＋0.028
＋0.007
―
28 ＋0.028
＋0.007
＋0.3
0
―
―
―
―
16.3
―
―
―
―
21.8
―
―
27.3
―
31.3
―
―
―
41.3
―
45.3
―
51.8
―
59.3
―
64.4
―
69.4
―
―
―
―
―
2-M4
―
―
―
―
2-M5
―
―
2-M6
―
2-M6
―
―
―
2-M8
―
2-M8
―
2-M10
―
2-M10
―
2-M10
―
2-M10
* Below φ11 of New JIS correspondence and below φ11 of New standard motor correspondence have the same contents as Previous JIS correspondence (Second class).
■Distance from the edge surface of setscrew
Size
Distance［mm］
001
002
6
6
Cylindrical hub
004
008
6
7
016
025
001
002
10
10
6
7
Flange hub
004
008
7
9
016
025
10
10
110
Centaflex
H7, H8
9 ＋0.022
0
10 ＋0.022
0
11 ＋0.018
0
12 ＋0.018
0
14 ＋0.018
0
15 ＋0.018
0
16 ＋0.018
0
17 ＋0.018
0
18 ＋0.018
0
19 ＋0.021
0
20 ＋0.021
0
22 ＋0.021
0
24 ＋0.021
0
25 ＋0.021
0
28 ＋0.021
0
30 ＋0.021
0
32 ＋0.025
0
35 ＋0.025
0
38 ＋0.025
0
40 ＋0.025
0
42 ＋0.025
0
45 ＋0.025
0
48 ＋0.025
0
50 ＋0.025
0
55 ＋0.030
0
56 ＋0.030
0
60 ＋0.030
0
63 ＋0.030
0
65 ＋0.030
0
New standard motor correspondence
Nominal
bore dia.
9
10
11
12
14
15
16
17
18
19
20
22
24
25
28
30
32
35
38
40
42
45
48
50
55
56
60
63
65
Nominal
bore dia.
Nominal
bore dia.
Tolerance
Keyway Keyway Setscrew
Bore dia
width
height
bore
（d1-d2）
（W1・W2）
（T1・T2） （M）
New JIS correspondence
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ111
CF-B
Generalpurpose
motor
Centaflex-B model
Stepping
motor
Servo
motor
Detector
Engine
■ Vibrations and shocks are absorbed
Elasticity-rich plastic used for the cushioning material as an
element absorbs vibrations and shocks during power
transmission. Noise is also reduced.
■ High durability
Elasticity-rich plastic (polyurethane or polyester) ensures a long
operating life. Polyester resin excels in resistance to heat and
low temperature and has over twice the torsional stiffness of
polyurethane resin. Maintenance is very minimal.
■ Center deviation
If there is a center deviation between two shafts, power is
smoothly transmitted.
■ Easy mounting and dismounting
Due to the compact and simple design with an element between two
hubs, mounting and dismounting are easy.
Normal operating torque
［mm］
φ10 ∼ 80
［℃］
CF-B：−40 ∼ ＋80
CF-B-H：−40 ∼ ＋120
Pilot bore/Additional machining range
Operational temp.
Backlash
Little
Parallel offset
Max.
permissible
misalignment
30 ∼ 1400
［N・m］
［mm］
Angular misalignment
Axial displacement
［°］
［mm］
CF-B：0.5
CF-B-H：0.3
CF-B：1
CF-B-H：0.5
±1
■ Structure and Material
¡ There are 2∼ 3 aluminum inserts previously fixed on the
hubs by bolts. Power is transmitted through the element put in
the aluminum inserts.
Element material:
Polyurethane resin or polyester resin
Bolt
Insert material: Aluminum alloy
Aluminum insert
Element
Cylindrical
hub
Centaflex
Screw material: SCM435
Surface treatment: Bright chromate
Cylindrical hub material: S45C
Surface treatment: Phosphate coating
■ Ordering information
CF - B - 100 - H
Size
111
Element material
Blank: Polyurethane resin (green)
H:
Polyester resin (yellow)
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ112
■ Specification
Model
Torque
Max. permissible misalignment
Normal Max.
［N･m］ ［N･m］
Angular
Axial
Parallel
misalignment displacement
offset ［mm］
［°］
［mm］
30
45
60
85
120
170
250
350
400
560
600
850
1000
1400
CF-B-070
CF-B-070-H
CF-B-080
CF-B-080-H
CF-B-100
CF-B-100-H
CF-B-120
CF-B-120-H
CF-B-140
CF-B-140-H
CF-B-165
CF-B-165-H
CF-B-185
CF-B-185-H
60
60
120
120
240
240
500
500
800
800
1200
1200
2000
2000
0.5
0.3
0.5
0.3
0.5
0.3
0.5
0.3
0.5
0.3
0.5
0.3
0.5
0.3
1.0
0.5
1.0
0.5
1.0
0.5
1.0
0.5
1.0
0.5
1.0
0.5
1.0
0.5
±1
±1
±1
±1
±1
±1
±1
±1
±1
±1
±1
±1
±1
±1
Max. rotation
speed
［min−1］
10000
10000
9000
9000
7500
7500
6000
6000
5000
5000
4000
4000
3600
3600
Static torsional
spring constant
(at 20℃)
［N・m/rad］
Moment of
inertia
［kg・m2］
Mass
［kg］
Price
1.30×103
2.76×103
1.53×103
4.15×103
3.51×103
9.49×103
7.90×103
2.03×104
1.34×104
3.44×104
2.36×104
5.24×104
1.02×105
2.53×105
2.80×10−4
2.80×10−4
3.39×10−4
3.39×10−4
1.34×10−3
1.34×10−3
3.34×10−3
3.34×10−3
7.02×10−3
7.02×10−3
1.78×10−2
1.78×10−2
3.67×10−2
3.67×10−2
0.7
0.7
0.8
0.8
2.0
2.0
3.4
3.4
5.4
5.4
8.7
8.7
13.8
13.8
-
* The values in moment of inertia and mass are based on the cylindrical hubs with pilot bores.
* If the rotation speed exceeds (2000minー1), misalignment must be less than 50% of the specification.
* The table indicates the prices based on prepared bores.
■ Dimensions
45ﾟ
L2
S L1
L1
E
φｄ
φＮ
φＤ
12
0
60 ﾟ
ﾟ
E
F
M
30ﾟ
φｄ
φＮ
φＤ
ﾟ
90
L2
L1 S L1
F
Size: 070
Size: 080∼185
Unit［mm］
Model
Pilot bore
Max.
9
12
12
15
15
19
29
30
30
38
48
55
60
80
D
N
L1
L2
S
E
72
76
98
120
138
165
187
45
45
60
70
85
100
115
28
30
42
50
55
65
80
62
66
90
106
116
138
170
6
6
6
6
6
8
10
14
16
24
28
30
36
45
F
40
42
64.5
76
83
99
123
M
CAD
file No.
4-M8
6-M8
6-M10
6-M12
6-M14
6-M16
6-M20
CF-B1
CF-B2
CF-B3
CF-B4
CF-B5
CF-B6
CF-B7
* There is no dimensional difference by element materials.
112
Centaflex
CF-B-070
CF-B-080
CF-B-100
CF-B-120
CF-B-140
CF-B-165
CF-B-185
d
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ113
■ Design check items
¡ The aluminum inserts are fixed on the cylindrical hub by
bolts before shipping. Do not loosen the bolts.
¡ When bore should be machined, chuck the cylindrical hub, not
other parts.
¡ The element excels in oil, yet excessive attachment
degrades its performance. Avoid having the element contact
oil.
¡ If exposed to direct sunshine, the life of the element may be
shortened. Provide a suitable cover.
■ Bolt specification and tightening
torque
■ Misalignment
Size
Nominal
designation
No. of
bolts
Tightening
torque 〔N・m〕
070
080
100
120
140
165
185
M8×12
M8×12
M10×18
M12×20
M14×25
M16×30
M20×32
4
6
6
6
6
6
6
25
25
50
90
140
220
470
Parallel offset (ε)
Angular misalignment (θ)
Axial displacement (S)
ε
θ
S
* The bolts conform to JIS B1176 hexagon socket head cap screws and are treated by
bright chromate and microcapsule coating (slack preventive).
¡ Check centering at two points, which are about 90° apart
from each other, by applying a jig onto the outer periphery of
the cylindrical hub. Adjust Axial displacement S based on L2
(full length).
■ General-purpose motor specification and simplified selection
50Hz：3000min−1 / 60Hz：3600min−1
Motor
Bipolar (2-pole) motor
Output Frequency
［kW］
［Hz］
0.4
0.75
1.5
2.2
3.7
5.5
7.5
Centaflex
11.0
15.0
18.5
22.0
30.0
37.0
45.0
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50Hz：1500min−1 / 60Hz：1800min−1
Centaflex
Quadrupolar (4-pole) motor
Shaft dia.
［mm］
Torque
［N・m］
Model
Nominal
bore dia.
Shaft dia.
［mm］
Torque
［N・m］
Model
Nominal
bore dia.
14
14
19
19
24
24
24
24
28
28
38
38
38
38
42
42
42
42
42
42
48
48
55
55
55
55
55
55
1.3
1.1
2.4
2
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-100
CF-B-100
CF-B-100
CF-B-100
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-140
CF-B-140
CF-B-140
CF-B-140
CF-B-140
CF-B-140
14N
14N
19N
19N
24N
24N
24N
24N
28N
28N
38N
38N
38N
38N
42N
42N
42N
42N
42N
42N
48N
48N
55N
55N
55N
55N
55N
55N
14
14
19
19
24
24
28
28
28
28
38
38
38
38
42
42
42
42
48
48
48
48
55
55
60
60
60
60
2.6
2.2
4.9
4.1
9.7
8.1
14
12
24
20
36
30
49
41
71
59
97
81
120
100
143
119
195
162
240
200
292
243
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-070
CF-B-080
CF-B-080
CF-B-100
CF-B-100
CF-B-100
CF-B-100
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-120
CF-B-140
CF-B-140
CF-B-165
CF-B-165
CF-B-165
CF-B-165
14N
14N
19N
19N
24N
24N
28N
28N
28N
28N
38N
38N
38N
38N
42N
42N
42N
42N
48N
48N
48N
48N
55N
55N
60N
60N
60N
60N
4.9
4.1
7.1
6
12
10
18
15
24
20
36
30
49
41
60
50
71
59
97
81
120
100
146
122
* The above table indicates the adaptive sizes of couplings when used in general-purpose motor drives.
* The motor rotation speed and output torque indicate calculated values (reference values).
113
Centaflex
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ114
■ Standard bore processing specification
W2
M
φｄ１
T2
W1
¡ Bore processing is available upon request. Products
are stored with pilot bores.
¡ Bores are machined based on the following
specification.
¡ Assign as described below when ordering.
Ex) CF-B-100 19N-20H
¡ The positions of setscrews will not be on the same
plane.
M
Ｔ１
φｄ２
Size: 070
φｄ１
T1
T2
W2
M
M
W1
φｄ２
Size: 080∼185
Unit［mm］
Previous JIS (Second class) correspondence
＋0.3
0
―
―
―
13.5
16.0
17.0
18.0
19.0
20.0
21.0
22.0
25.0
27.0
28.0
31.0
33.0
35.5
38.5
41.5
43.5
45.5
48.5
51.5
53.5
60.0
61.0
65.0
69.0
71.0
―
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M4
2-M6
2-M6
2-M6
2-M6
2-M6
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M8
2-M10
2-M10
2-M10
2-M10
2-M10
Tolerance
―
―
―
12H
14H
15H
16H
17H
18H
19H
20H
22H
24H
25H
28H
30H
32H
35H
38H
40H
42H
45H
48H
50H
55H
56H
60H
63H
65H
Keyway Keyway Setscrew
Bore dia
width
height
bore
（d1-d2）
（W1-W2）
（T1-T2） （M）
H7
―
―
―
12 ＋0.018
0
14 ＋0.018
0
15 ＋0.018
0
16 ＋0.018
0
17 ＋0.018
0
18 ＋0.018
0
19 ＋0.021
0
20 ＋0.021
0
22 ＋0.021
0
24 ＋0.021
0
25 ＋0.021
0
28 ＋0.021
0
30 ＋0.021
0
32 ＋0.025
0
35 ＋0.025
0
38 ＋0.025
0
40 ＋0.025
0
42 ＋0.025
0
45 ＋0.025
0
48 ＋0.025
0
50 ＋0.025
0
55 ＋0.030
0
56 ＋0.030
0
60 ＋0.030
0
63 ＋0.030
0
65 ＋0.030
0
H9
―
―
―
4 ＋0.030
0
5 ＋0.030
0
5 ＋0.030
0
5 ＋0.030
0
5 ＋0.030
0
6 ＋0.030
0
6 ＋0.030
0
6 ＋0.030
0
6 ＋0.030
0
8 ＋0.036
0
8 ＋0.036
0
8 ＋0.036
0
8 ＋0.036
0
10 ＋0.036
0
10 ＋0.036
0
10 ＋0.036
0
12 ＋0.043
0
12 ＋0.043
0
14 ＋0.043
0
14 ＋0.043
0
14 ＋0.043
0
16 ＋0.043
0
16 ＋0.043
0
18 ＋0.043
0
18 ＋0.043
0
18 ＋0.043
0
＋0.3
0
―
―
―
13.8
16.3
17.3
18.3
19.3
20.8
21.8
22.8
24.8
27.3
28.3
31.3
33.3
35.3
38.3
41.3
43.3
45.3
48.8
51.8
53.8
59.3
60.3
64.4
67.4
69.4
―
―
―
―
2-M4
2-M4
2-M4
2-M4
2-M4
2-M5
2-M5
2-M5
2-M5
2-M6
2-M6
2-M6
2-M6
2-M8
2-M8
2-M8
2-M8
2-M8
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
2-M10
Tolerance
―
―
―
―
14N
―
―
―
―
19N
―
―
24N
―
28N
―
―
―
38N
―
42N
―
48N
―
55N
―
60N
―
65N
Keyway Keyway Setscrew
Bore dia
width
height
bore
（d1-d2）
（W1-W2）
（T1-T2） （M）
G7, F7
―
―
―
―
14 ＋0.024
＋0.006
―
―
―
38 ＋0.050
＋0.025
H9
―
―
―
―
5 ＋0.030
0
―
―
―
―
6 ＋0.030
0
―
―
8 ＋0.036
0
―
8 ＋0.036
0
―
―
―
10 ＋0.036
0
―
42 ＋0.050
＋0.025
―
12 ＋0.043
0
―
48 ＋0.050
＋0.025
―
14 ＋0.043
0
―
55 ＋0.060
＋0.030
―
16 ＋0.043
0
―
60 ＋0.060
＋0.030
―
18 ＋0.043
0
―
65 ＋0.060
＋0.030
―
18 ＋0.043
0
―
―
―
―
19 ＋0.028
＋0.007
―
―
24 ＋0.028
＋0.007
―
28 ＋0.028
＋0.007
＋0.3
0
―
―
―
―
―
2-M4
―
―
―
―
2-M5
―
―
2-M6
―
2-M6
―
―
―
2-M8
―
2-M8
―
2-M10
―
2-M10
―
2-M10
―
2-M10
―
―
―
―
16.3
―
―
―
―
21.8
―
―
27.3
―
31.3
―
―
―
41.3
―
45.3
―
51.8
―
59.3
―
64.4
―
69.4
* Below φ11 of New JIS correspondence and below φ11 of New standard motor correspondence have the same contents as Previous JIS correspondence (Second class).
■Distance from the edge surface of setscrew
Size
Distance［mm］
070
080
100
120
140
165
185
7
8
10
10
10
15
15
114
Centaflex
E9
―
―
―
4 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
5 ＋0.050
＋0.020
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
7 ＋0.061
＋0.025
10 ＋0.061
＋0.025
10 ＋0.061
＋0.025
10 ＋0.061
＋0.025
10 ＋0.061
＋0.025
12 ＋0.075
＋0.032
12 ＋0.075
＋0.032
12 ＋0.075
＋0.032
12 ＋0.075
＋0.032
15 ＋0.075
＋0.032
15 ＋0.075
＋0.032
15 ＋0.075
＋0.032
18 ＋0.075
＋0.032
18 ＋0.075
＋0.032
New standard motor correspondence
Nominal
bore dia.
9
10
11
12
14
15
16
17
18
19
20
22
24
25
28
30
32
35
38
40
42
45
48
50
55
56
60
63
65
H7, H8
9 ＋0.022
0
10 ＋0.022
0
11 ＋0.018
0
12 ＋0.018
0
14 ＋0.018
0
15 ＋0.018
0
16 ＋0.018
0
17 ＋0.018
0
18 ＋0.018
0
19 ＋0.021
0
20 ＋0.021
0
22 ＋0.021
0
24 ＋0.021
0
25 ＋0.021
0
28 ＋0.021
0
30 ＋0.021
0
32 ＋0.025
0
35 ＋0.025
0
38 ＋0.025
0
40 ＋0.025
0
42 ＋0.025
0
45 ＋0.025
0
48 ＋0.025
0
50 ＋0.025
0
55 ＋0.030
0
56 ＋0.030
0
60 ＋0.030
0
63 ＋0.030
0
65 ＋0.030
0
Nominal
bore dia.
Nominal
bore dia.
Tolerance
Keyway Keyway Setscrew
Bore dia
width
height
bore
（d1-d2）
（W1-W2）
（T1-T2） （M）
New JIS correspondence
P103_120_センフレ
(E).qxd 08.2.29 4:38 PM ページ115
CM
Available by
special order
CentaMax
Generalpurpose
motor
Servo
motor
Stepping
motor
Detector
Engine
■ Vibrations and shocks are absorbed
The elasticity-rich rubber transmits power and absorbs vibrations and
shocks.
■ Resonance avoidance
It is flexible in a torsional direction and downs a resonance point
caused by torsional vibration to below engine low idling.
■ Compactness
It is short in axial direction to save a space.
■ Excellent durability
This coupling excels in durability, which assures a long operating life.
Maintenance is very minimal.
■ Easy mounting and dismounting
Input and output can be connected and disconnected easily
merely by moving axially.
It can be mounted directly in SAE J620 engine flywheel.
Normal operating torque
Pilot bore/Additional machining range
Operational temp.
120 ∼ 14000
［N・m］
φ11 ∼ 180
［mm］
［℃］
−30 ∼ ＋80
Backlash
Max.
permissible
misalignment
Yes
Parallel offset
Angular misalignment
Axial displacement
0.5
［mm］
0.5
［°］
［mm］
See table of dimensions
■ Structure and Material
¡ Power is transmitted from an engine flywheel to the flexible rubber part, inner hub bolted from
outer hub and driven shaft through the outer ring.
Vent bores are provided for heat dissipation.
■Type: S1
Driven
shaft
Size: 120∼2400
115
Bolt
Flywheel
Flywheel
Centaflex
Outer ring
Rubber
Material: Natural rubber
Outer hub
Inner hub
Bolt
Size: 2600∼12000
Outer ring
Rubber
Material: Natural rubber
Outer hub
Inner hub
Driven
shaft
P103_120_センフレ
(E).qxd 08.2.29 4:39 PM ページ116
■ Ordering information
CM - 1200 - S1 - 50 - 14
Flange sizze
6: 61/2，7: 71/2，8: 8，10: 10，11: 111/2
14: 14，16: 16，18: 18，21: 21，24: 24
Size
Type
O0
S0
SB
S1
: Rubber body
: O0 + Outer ring
: S0 + bolt
: SB + inner hub
Rubber hardness
50 : 50Hs
60 : 60Hs
■ Specification
Model
CM-120
CM-240
CM-400
CM-800
CM-1200
CM-1600
CM-2400
CM-2600
CM-2800
CM-3000
CM-3500
CM-4000
CM-5000
CM-8000
CM-12000
Normal
［N･m］
Max.
［N･m］
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
50
60
120
140
200
240
320
400
650
800
1000
1200
1300
1600
2000
2400
2500
2700
2800
3000
3000
3000
3200
3500
4000
4500
4000
4500
5400
6000
8000
9000
12500
14000
300
350
400
480
640
800
1300
1600
2000
2400
2600
3200
4000
4800
5000
6000
6000
7500
6000
6000
6500
8000
8000
11000
8000
9000
11000
12000
16000
22000
25000
28000
Max. permissible misalignment
Max. rotation
Parallel
Angular
speed
offset
misalign［min−1］
［mm］ ment［° ］
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
5000
5000
4000
4000
3600
3600
3600
3600
3500
3500
3200
3200
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
2300
2300
2000
2000
1800
1800
Static torsional
spring constant
［N・m/rad］
3.00×102
5.00×102
9.25×102
1.40×103
1.60×103
2.50×103
2.80×103
4.20×103
5.30×103
8.40×103
5.50×103
8.40×103
1.00×104
1.50×104
7.50×103
1.15×104
2.15×104
3.27×104
1.00×104
1.51×104
1.60×104
2.40×104
3.40×104
5.00×104
1.90×104
2.80×104
2.80×104
4.30×104
5.00×104
7.50×104
7.80×104
1.15×105
Price
-
Centaflex
CM-6000
Torque
Rubber
hardness
［Hs］
―
―
* If the rotation speed exceeds (1500minー1), misalignment must be less than 50% of the specification.
* The table indicates the prices for Type S1 with prepared bores.
116
P103_120_センフレ
(E).qxd 08.2.29 4:39 PM ページ117
■ Dimensions
Z−φS
C
Z−φS
C
A
A
E
E
M
CM-120∼2400-S1
φD1
φd1
L1
L
L
φN
φDA
φDT
φD1
φN
L1
φd1
φDT
φDA
M
CM-2600∼12000-S1
Unit［mm］
Model
CM-120
CM-240
CM-400
CM-800
CM-1200
CM-1600
CM-2400
CM-2600
CM-2800
Centaflex
CM-3000
CM-3500
CM-4000
CM-5000
CM-6000
CM-8000
CM-12000
Flange size
SAE J620
61/2
71/2
8
8
10
10
10
111/2
14
111/2
14
14
16
18
14
16
18
14
16
18
14
16
18
14
16
18
14
16
18
14
16
18
14
16
18
18
18
21
24
21
24
A
C
43
d1
D1
E
L
L1
N
M
42
220
20
56
42
67
6-M6
13
50
225
27
75
60
73
6-M8
75±7
82±2
71±3
74±6
65±4
74±1
18
60
313
316
25
80
65
90
8-M8
18
70
18
84
66
107
8-M10
18
70
318
18
84
66
107
8-M10
61
97±11
28
105
417
26
106
85
150
8-M12
61
97±6
28
105
417
26
106
85
150
8-M12
70
96±6
35
110
465
59
139
100
162
8-M16
61
135±4
33
110
417
76
131
105
162
8-M16
70
135±8
19
65
465
53
135
105
100
12-M12
70
135±8
33
110
465
60
140
105
162
8-M16
70
161±6
48
140
465
94
159
125
218
12-M16
70
147±2
35
110
465
64
159
105
162
12-M16
80
106
90
90
156
137
159±9
48
140
540
600
76
161
125
218
12-M16
197±5
68
180
110
195
150
248
12-M20
310±9
70
180
176
306
200
248
24-M20
Pilot bore
Max.
64±2
10
46
75±9
45
50
39
46
39
46
* The configuration of Size 120 is slightly different from the drawing above.
117
318
584
680
P103_120_センフレ
(E).qxd 08.2.29 4:39 PM ページ118
■Mounting dimensions
The driving-side outer ring is designed to mount directly in the SAE standard J620 flywheel.
Unit［mm］
Flange size
SAE J620
6 1／2
7 1／2
8
10
11 1／2
DA
DT
215.9
241.3
263.5
314.3
352.4
200.0
222.3
244.5
295.3
333.4
Z
6×60°
8×45°
6×60°
8×45°
8×45°
S
9
9
11
11
11
Unit［mm］
Flange size
SAE J620
14
16
18
21
24
DA
DT
466.7
517.5
571.5
673.1
733.4
438.2
489.0
542.9
641.4
692.2
Z
8×45°
8×45°
6×60°
12×30°
12×30°
S
13
13
17
17
19
■ Design check items
■Designing inner hub
When newly designing inner hubs consult Miki Pulley regarding
materials and dimensions of mounted portion with rubber parts.
■Bolt specification and tightening torque (For fixing inner hubs)
Size
120
240
400
800
1200
1600
2400
2600
2800
3000
3500
4000
5000
6000
8000
12000
Bolt specification
No. of bolts
Nominal dia. x length under head
6
6
8
8
8
8
8
8
8
12
8
12
12
12
12
24
M6×20
M8×20
M8×20
M10×20
M10×20
M12×25
M12×25
M16×40
M16×40
M12×30
M16×40
M16×40
M16×40
M16×40
M20×50
M20×80
Class of strength
8.8 or more
10.9 or more
Tightening torque
［N・m］
10
25
25
50
50
85
85
310
310
85
310
310
310
310
600
600
* The bolts conform to JIS B1176 hexagon socket head cap screws.
* Consult Miki Pulley when using bolts other than those specified above.
■Operating environment
Centaflex
¡ Store the rubber parts in a cool place avoiding direct
sunshine.
¡ The rubber parts are not fully resistant to oil and grease.
Avoid having the rubber parts contact oil or grease. If
contacted, wipe off immediately with alcohol or acetone.
¡ Do not use any liquid anaerobic adhesive (screw lock
agent). It may damage the rubber parts.
■Max. permissible misalignment
As a basic mounting method, inlay alignment is suggested.
■Check items in assembly
Tighten the bolts at the specified torque by using a torque
wrench when mounting the rubber parts in the inner hubs. At
this time, coat a little grease onto the bearing surface of the bolt
to achieve reliable tightening. (Do not coat any grease on the
screw part of the bolt.)
118
P103_120_センフレ
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■ Selection
(For CF-A, CF-H, CF-X, CF-B and CM)
■Selection Procedure
■Service factor
q Calculate torque Ta applied to the coupling based on the
motor output P and coupling operating rotation speed n.
P
［kW］
Ta［N･m］＝9550×
n
［min−1］
●Use factor: K1
w Calculate corrected torque Td applied to the coupling after
deciding the service factor K (1, 2, 3 and 4).
Td［N･m］＝Ta・K1・K2・K3・K4
K1: Operating coefficient by load character
K2: Corrected coefficient by operating hours
K3: Corrected coefficient by misalignment
K4: Corrected coefficient by ambient temperature
¡Printing machinery
1.5
¡Winches
1.5
¡Escalators
1.0
¡Elevators
Bucket centrifugal gravity discharge type, for cargo
1.25
For flights or passengers
2.0
¡Car dampers
2.5
¡Car pullers
1.5
e Select the size in order that the coupling permissible torque Tn
becomes greater than the corrected torque Td.
Tn≧Td
¡Agitators
r Select the size in order that the maximum torque of the
coupling Tm becomes greater than the peak torque Ts
generated by the motor or driven machine, or both.
Maximum torque is defined as torque which can be
temporarily applied. For 8-hour operating time per day, it is
about 10 times.
Tm≧Ts
¡Metal forming machine
t Calculate the corrected fluctuating torque Tkw1 of the
coupling using the formula below.
(For CF-A and CM)
Tkw1＝Tk・Sf・St
＋Tk
Tk: Torque fluctuation magnitude
Sf: Period (fluctuation) coefficient
Tn
St: Temperature coefficient (=K4)
Tn shall be below normal operating
torque.
≦10
＞10
［Hz］
f
1
Sf
Tk
f
１０
Centaflex
y If the required shaft diameter is over the maximum bore
diameter of the selected size, select a coupling suiting it.
When using with machines whose load torque fluctuates
drastically on periodic basis, a study of torsional vibration is
necessary in addition to the procedure mentioned above.
Make sure that frequency of torque fluctuations does not
coincide with the resonance frequency fe of the shaft
system. Generally, eigenfrequency fe is calculated by
approximating the shaft system as shown below.
６０
２π
¡Steering gears
1.0
1.5
Draw benches, main drives, extruders, forming machines
2.0
Slitters
1.0
Wire drawing machines or rolling machines
1.75
Copper wire drawing and coiling machines
1.5
¡Cranes and hoists
Main hoists
2.0
Skip hoists, Bridge trolleys
1.75
Slopes
1.5
¡Machine tools
Auxiliary drives, moving equipment
1.0
Bending rolls, notch presses, punch presses
1.75
Planar, plate reversing
1.75
Main drives
1.5
¡Conveyers
Confirm if the corrected fluctuating torque Tkw1 calculated by
the formula above is less than the permissible fluctuating
torque Tkw of the selected size.
fe＝
Rectifying and lateral screws, propellers, paddles
κ（Ⅰ１A ＋Ⅰ１B ）［cpm］
κ ：Dynamic torsional spring constant of coupling〔N・m/rad〕
ⅠA ：Inertial moment of driving side［㎏・m2］
ⅠB ：Inertial moment of driven side［㎏・m2］
ⅠB
ⅠA
Aprons, assemblies and belts
1.0
Chains, flats, screws
1.0
Buckets
1.25
Rib rolls, shakers, reciprocating type
3.0
¡Compressors
Centrifugal system
1.0
Rope or rotary
1.25
Reciprocating type
For direct coupling
＊
Without flywheel
＊
Flywheel between compressor and motor
With gear
Less than 2 cylinders and less than 2 cycles
3.0
Less than 3 cylinders and less than 1 cycle
3.0
Less than 3 cylinders and less than 2 cycles
2.0
More than 4 cylinders and less than 2 cycles
1.75
¡Pug mills (Ceramics)
1.75
¡Purifiers or classifiers
1.0
¡Screens
κ
119
Air purifiers, intake type
1.0
Coal and gravel rotary presses
1.5
Vibrating type
2.5
P103_120_センフレ
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●Corrected coefficient by operating hours: K2
¡Washers or rotary polishing machines
2.0
¡Ship pullers
2.0
Hours/per day 8≧
10
1.0
1.1
K2
12
14
16
18
20
1.3
1.2
22
24
1.4
1.5
¡Blowers
Centrifugal type
Blade type
1.0
1.25
¡Tumbling barrels
1.75
¡Dynamometers
1.0
●Corrected coefficient by misalignment: K3（＝Kε×Kθ）
(1) CENTAFLEX CF-A
Parallel offset［mm］
¡Generators(Exciting machines)
Kε
Constant force
1.0
Hoists or railways
1.5
Load fluctuations (Welders)
2.0
¡Hammer mills
2.0
¡Pulverizers
2.0
Hammer mills, hogs
1.75
Rollers
1.5
Angular misalignment［°］
Kθ
0.3
1.0
1.0
0.5
1.0
0.5
1.0
1.2
1.0
1.1
0.8
1.3
1.5
1.5
1.3
1.0
1.5
2.0
2.0
1.5
1.5
2.0
―
2.5
1.8
3.0
2.0
All sizes excluding the following sizes
1.0
1.2
1.5
2.0
―
―
012, 022, 028, 050,
080, 140, 250, 400
(2) CENTAFLEX CF-H
0.3 or less
1.0
Parallel offset［mm］
Kε
Centrifugal type
1.0
Cooling towers
2.0
0.5 or less
1.0
Kθ
(3) CENTAFLEX CF-X
0.05 or less
1.0
0.5 or less
1.0
Parallel offset［mm］
For forced ventilation
Across line start
1.5
Fluids or with electromagnetic clutch
1.0
Gas circulator
Tumbler control or with blade cleaner
1.25
Without control
2.0
Kε
Angular misalignment［°］
Kθ
Corrected coefficient
1.25
Centrifugal type
1.0
(5) CENTAMAX
Gears, rotary or blade type
1.25
¡Feeders
Reciprocating
¡Plastic extruders
1.0
2.5
0.1
1.5
1.0
1.5
(4) CENTAFLEX CF-B
0.2
Kε
Parallel
0.3
offset［mm］ 0.5
0.25
Kθ
Angular
0.5
misalignment［°］
1
Aprons, belts, discs, screws
0.4
1.1
Angular misalignment［°］
¡Fan
Size
016∼400
001∼012
Size
CF-B
CF-B-H
1.0
1.1
1.2
1.0
1.0
1.1
1.1
1.2
―
1.0
1.1
―
¡Pumps
Reciprocating
Kε
Angular misalignment［°］
2.0
2 cylinders 1 cycle
2.0
2 cylinders 2 cycles
1.75
More than 3 cylinders
1.5
1.5
Kθ
●Corrected coefficient by ambient temp.: K4（＝St）
Temp.［℃］ -20 -10 0
¡Mixers
1.0
CF-A
1.75
Crushing
1.5
1.0
* Items marked * require consultation.
* The indicated values are general recommended values.
* The indicated values are applicable to motors, stream turbines and internal combustion
engines with more than four cylinders.
* Add 0.7 to the indicated values for internal combustion engine drive with single cylinder.
Add 0.3 to the indicated values for internal combustion engine drive with two or three
cylinders.
Centaflex
Concrete
¡Woodworking machines
10 20 30 40 50 60 70 80 90 100
1.1 1.2 1.4 1.6 ―
1.0
CF-H
CF-X
CF-B
CF-B-H
Centa-Max
1.3
1.2
1.0
1.0
1.2
1.1
1.0
1.0
1.8
1.5
1.3
―
1.1
1.1 1.2 1.4
―
120
Centaflex
1 cylinder 1 or 2 cycles
¡Winches
0.5 or less
1.0
0.5 or less
1.0
Parallel offset［mm］