CD® Double Flex Coupling

Available in 1.85" to 12" diameters (47mm to 305mm), with continuous torque to 47,200 inch pounds (5,333Nm).
Misalignment up to 3° angular, 0.137" (3.5mm) parallel and 0.500" (12.7mm) axial.

The double disc pack coupling is recommended in applications where shafts are double-bearing supported or where additional parallel misalignment is present in the system.

The coupling's large misalignment capability makes installation simple and lends itself to a wide variety of industrial applications.

Available with Low Inertia Aluminum Hubs

Performance Information

Set Screw Dimensions Chart

Clamp Style Dimensions Chart

Double Flex Performance Information

6P18 6P22 6P26 6P30 6P37 6P45 6P52 6P60 6P67 6P77 6P90 6P105 6P120
Max. HP/100 RPM .29 .43 .75 1.27 2.54 3.97 5.65 10.08 16.34 24.75 39.67 55.37 74.89
Continuous
Rated Torque
in-lbs (Nm)		 180
20		 270
30		 475
53		 800
90		 1600
181		 2500
282		 3560
402		 6350
718		 10,300
1164		 15,600
1763		 25,000
2825		 34,900
3944		 47,200
5333
Torsional
Stiffness
in-lbs/Deg. (Nm./Rad)		 850
5,500		 1310
8,482		 1500
9,712		 3231
20,923		 5051
32,700		 9317
60,324		 12,682
82,109		 20,196
130,763		 30,159
195,265		 45,815
296,634		 78,213
506,395		 118,889
769,756		 159,730
1,034,187
Maximum Speed
                         
A & B Hub (RPM) 14000 12000 10500 9000 7400 6100 5100 4600 4300 3300 2800 2500 2100
Clamp Hub (RPM) 12000 11000 9500 8000 6700 5600 4800 4400 4100        
Misalignments:
                          
Angular
Degrees
 3 3 3 3 3 3 3 3 3 3 3 3 3
Parallel:
Inch (mm)
 .022
0.56		 .026
0.66		 .030
0.76		 0.039
1.0		 0.049
1.2		 0.052
1.3		 0.062
1.6		 0.069
1.8		 0.076
1.9		 0.089
2.3		 0.101
2.6		 0.126
3.2		 0.137
3.5
Axial:
Inch (mm)
 .060
1.5		 .072
1.8		 .086
2.2		 0.100
2.5		 0.140
3.6		 0.180
4.6		 0.220
5.6		 0.260
6.6		 0.300
7.6		 0.320
8.1		 0.360
9.1		 0.420
10.7		 0.500
12.7
A Hub
                         
Unit Weight
at Max Bore
Lb. (kg.)
 .47
0.21		 1.10
0.50		 1.66
0.75		 2.5
1.1		 4.5
2.1		 7.9
3.6		 12.8
5.8		 18.4
8.4		 26.2
11.9		 38.5
17.5		 61.4
27.9		 101
45.9		 150
68.2
Unit Inertia
at Max Bore
lb-in2 (kg-cm2)
 .19
0.56		 0.66
1.94		 1.19
3.47		 2.5
7.3		 7.5
21.8		 19.1
55.9		 41.6
122		 79.3
232		 141
413		 273
799		 596
1744		 1362
3986		 2600
7609
B Hub
                         
Unit Weight
at Max Bore
Lb. (kg.)
1.18
0.54		 1.66
0.75		 3.0
1.3		 5.1
2.3		 8.7
4.0		 13.7
6.2		 21.5
9.8		 30.7
14.0		 45.8
20.8		 74.1
33.7		 118
53.6		 167
76.0
Unit Inertia
at Max Bore
lb-in2 (kg-cm2)
0.82
2.41		 1.46
4.28		 3.5
10.2		 9.8
28.6		 24.5
71.7		 52.5
154		 109
319		 193
565		 381
1115		 857
2508		 1888
5525		 3646
10,670
Clamped Hub
                         
Unit Weight
at Max Bore
Lb. (kg.)
 1.02
0.46		 1.45
0.66		 2.10
0.95		 3.37
1.53		 6.29
2.85		 9.15
4.15		 14.1
6.4		 21.1
9.6		 30.8
14.0		  
Unit Weight
at 1/2 Max Bore
Lb. (kg.)
 0.86
0.39		 1.66
0.75		 1.83
0.83		 2.52
1.14		 5.30
2.41		 8.8
4.0		 12.1
5.5		 17.9
8.1		 22.9
10.4
Unit Inertia
a Max Bore
lb-in2 (kg-cm2)
 0.49
1.43		 0.90
2.62		 1.72
5.03		 3.74
10.95		 11.52
33.68		 22.5
65.7		 48.2
140.9		 93.5
273.6		 174
508
Unit Inertia
at 1/2 Max Bore
lb-in2 (kg-cm2)
 0.31
0.90		 0.71
2.07		 1.23
3.59		 2.32
6.79		 8.10
23.69		 18.9
55.3		 36.5
106.8		 71.0
207.5		 115
336

Notes:

  • Peak torque is two times the continuous torque rating.
  • Weight and Inertia data are for maximum bore in Style "A" and Style "B" hubs.
  • Consult factory for speeds higher than those listed and balancing requirements, if necessary.
  • Consult factory for higher torque and higher torsional stiffness couplings.
  • Sizes larger than 6" (152 mm) in diameter are not stocked and will require longer delivery times.
 

Double Flex Dimensional Information

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Dimensions are for keyway/setscrew style hubs. Click here for Clamp Style Hub

 
Double Flex Dimension Information

6P18 6P22 6P26 6P30 6P37 6P45 6P52 6P60 6P67 6P77 6P90 6P105 6P120
A
 Inch
(mm)		 1.85
47.0		 2.25
57.2		 2.59
65.9		 3.00
76.2		 3.75
95.3		 4.50
114		 5.25
133		 6.00
152		 6.75
171		 7.75
197		 9.00
229		 10.50
267		 12.00
305
B
 Inch
(mm)		 .625
15.9		 .938
23.8		 1.06
27		 1.25
31.8		 1.44
36.5		 1.69
42.9		 1.94
49.2		 2.44
61.9		 2.75
69.9		 3.13
79.4		 3.75
95.3		 4.25
108		 4.75
121
C
 Inch
(mm)		 .803
20.4		 .956
24.3		 1.03
26.3		 1.42
36.1		 1.67
42.4		 1.85
47.0		 2.11
53.5		 2.41
61.2		 2.70
68.7		 3.15
80.1		 3.58
91.0		 4.42
112		 4.82
123
Max Bore
Ea
"A" Hub
 Inch
(mm)		 .625
16		 .625
16		 .750
19		 1.000
25		 1.250
32		 1.625
42		 1.875
48		 2.250
60		 2.625
66		 2.875
75		 3.000
76		 3.750
95		 4.250
110
Max Bore
Ga
"A" Hub
 Inch
(mm)		 1.125
28.6		 1.219
31		 1.502
38.2		 1.71
43		 2.19
56		 2.69
68		 3.31
84		 3.67
93		 4.29
108		 4.61
117		 5.38
137		 6.11
155		 7.34
186
Max Bore
Eb
"B" Hub
 Inch
(mm)
1.000
26		 1.250
32		 1.375
35		 1.813
46		 2.250
60		 2.625
66		 3.000
76		 3.375
85		 3.875
100		 4.500
115		 5.125
130		 6.000
152
Max Bore
Gb
"B" Hub
Inch
(mm)
1.88
47.6		 2.16
54.8		 2.50
64		 3.13
79		 3.75
95		 4.38
111		 5.00
127		 5.63
143		 6.46
164		 7.50
190		 8.75
222		 10.00
254
H
 Inch
(mm)		 .790
20.1		 .907
23.8		 1.00
25.4		 1.21
31		 1.51
38		 1.81
46		 2.10
54		 2.42
61		 2.72
69		 3.13
79		 3.62
92		 4.23
107		 4.83
123
L
 Inch
(mm)		 2.05
52.1		 2.83
71.9		 3.16
80.2		 3.92
100		 4.55
115		 5.23
133		 5.98
152		 7.29
185		 8.20
208		 9.40
239		 11.08
281		 12.92
328		 14.32
364
X
 Inch
(mm)
.51
13		 0.39
9.9		 0.39
9.9		 0.68
17.3		 0.91
23.1		 0.73
18.5		 0.69
17.5		 0.41
10.4		 0.89
22.6		 1.39
35.3		 1.92
48.8		 1.48
37.6
Y
 Inch
(mm)		 .48
12.2		 .64
16.3		 .47
12		 0.68
17.3		 0.95
24.1		 1.35
34.3		 1.10
27.9		 1.42
36.1		 1.11
28.2		 1.40
35.6		 1.47
37.3		 2.64
67.1		 2.14
54.4
Notes:
  • "X" and "Y" dimensions are minimum bolt travel required beyond the hub to disassemble the disc packs and/or intermediate member from the Hubs.
  • Rotating equipment is potentially dangerous.  The user should be sure suitable guarding is provided and applicable safety codes are met.
  • For applications such as man lifts, ski/tow lifts, freight/passenger elevators or escalators, consult factory.

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The right to make engineering refinements on all products is reserved.
Dimensions and other details subject to change.
When dimensions are critical, detailed drawings should be obtained from the factory.

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