CD® Double Flex Spacer Coupling

Available in 1.85" to 12" diameters (47mm to 304.8mm), 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.

 
General purpose spacer couplings are recommended where easily removable spacers simplify servicing of seals and bearings without moving connected equipment. Standard spacer lengths are from 3.5" to 9.5" (88.9mm to 299mm)

Performance Information

Set Screw Dimensions Chart

Clamp Style Dimensions Chart

Double Flex Performance Information

6S18 6S22 6S26 6S30 6S37 6S45 6S52 6S60 6S67 6S77 6S90 6S105 6S120
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)		 740
4,780		 1125
7,284		 1425
9,226		 3057
19,792		 4778
30,932		 8813
57,063		 11,996
77,671		 19,105
123,695		 28,529
184,710		 43,339
280,600		 73,985
479,022		 112,463
728,022		 151,096
978,285
Maximum Speed
                         
A & B Hub (RPM) 11000 8200 5300 6700 4000 3900 4100 3600 3400 2900 2500 2200 1800
Clamp Hub (RPM) 11000 8200 5200 6700 4000 3900 4100 3600 3400        
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.)
 1.04
0.47		 1.60
0.73		 2.34
1.06		 3.3
1.5		 6.1
2.8		 10.4
4.7		 16.2
7.4		 24.5
11.1		 33.5
15.2		 49.5
22.5		 82.9
37.7		 132
60.0		 193
87.7
Unit Inertia
at Max Bore
lb-in2 (kg-cm2)
 0.43
1.26		 0.96
2.81		 1.76
5.16		 3.4
10.0		 10.5
30.7		 26.5
77.6		 56.4
165		 110
322		 193
565		 372
1089		 846
2476		 1847
5405		 3521
10,303
B Hub
                         
Unit Weight
at Max Bore
Lb. (kg.)
   1.68
0.76		 2.34
1.06		 3.8
1.7		 6.7
3.0		 11.3
5.1		 17.1
7.8		 27.6
12.5		 38.1
17.3		 56.8
25.8		 95.6
43.5		 148
67.3		 210
95.5
Unit Inertia
at Max Bore
lb-in2 (kg-cm2)
   1.12
3.28		 2.04
5.98		 4.4
12.8		 12.8
37.5		 31.9
93 		67.2
197		 140
410		 245
717		 481
1408		 1107
3240		 2373
6944		 4567
13,365
Clamped Hub
                   
Unit Weight
at Max Bore
Lb. (kg.)
 1.37
0.36		 1.95
0.88		 2.90
1.32		 4.21
1.91		 8.56
3.88		 11.7
5.3		 17.6
8.0		 27.2
12.3		 38.2
17.3
Unit Weight
at 1/2 Max Bore
Lb. (kg.)
1.21
0.55		 1.78
0.81		 2.63
1.19		 3.36
1.52		 6.88
3.12		 11.3
5.1		 15.6
7.1		 24.0
10.9		 30.3
13.7
Unit Inertia
a Max Bore
lb-in2 (kg-cm2)
0.60
1.75		 1.20
3.49		 2.31
6.74		 4.65
13.59		 14.6
42.6		 29.9
87.4		 62.9
183.9		 125
364		 225
658
Unit Inertia
at 1/2 Max Bore
lb-in2 (kg-cm2)
0.42
1.22		 1.01
2.95		 1.82
5.31		 3.23
9.44		 11.1
32.6		 26.3
76.9		 51.2
149.85		 102
298		 167
487
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 with standard spacer length.
  • 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 Spacer Dimensional Information

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

 
Double Flex Spacer Dimension Information

6S18 6S22 6S26 6S30 6S37 6S45 6S52 6S60 6S67 6S77 6S90 6S105 6S120
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)		 .63
15.9		 .94
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		 3.12
79.4		 3.75
95.3		 4.25
108		 4.75
121
C Inch
(mm)		 3.50
88.9		 3.50
88.9		 3.50
88.9		 3.50
89		 3.50
89		 3.50
89		 4.38
111		 5.00
127		 5.00
127		 7.00
178		 8.00
203		 8.00
203		 9.50
241
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)		 1.13
28.6		 1.22
31		 1.50
38.2		 1.71
43		 2.19
56		 2.69
68		 3.31
84		 3.67
93		 4.29
109		 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
191		 8.75
222		 10.00
254
H Inch
(mm)		 .790
20.1		 .91
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)		 4.75
120.6		 5.38
136.5		 5.62
142.8		 6.00
152		 6.38
162		 6.87
175		 8.26
210		 9.87
251		 10.50
267		 13.26
337		 15.00
381		 16.50
419		 19.00
483
X Inch
(mm)
.51
13		 .39
9.9		 0.39
9.9		 0.68
17.3		 0.91
23.1		 0.73
18.6		 0.69
17.6		 0.41
10.4		 0.89
22.6		 1.39
35.3		 1.92
48.8		 1.48
37.6
Notes:
  • "X" dimension is minimum bolt travel required beyond the hub to disassemble 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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