CD® Single 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, 0.040" (1mm) parallel and 0.250" (6.4mm) axial.

The single disc pack coupling is an excellent choice for servo motor applications, use in pairs for floating shaft applications, and many other uses where a small amount of parallel misalignment is needed and where precise alignment is difficult to achieve.

This is also available with Low Intertia Aluminum Hubs.


Performance Information

Set Screw Dimensions Chart

Clamp Style Dimensions Chart

 

Single Flex Performance Information

6A18 6A22 6A26 6A30 6A37 6A45 6A52 6A60 6A67 6A77 6A90 6A105 6A120
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)		 1800
11,650		 2680
17,352		 3100
20,100		 6638
42,976		 10,374
67,167		 19,138
123,909		 26,049
168,656		 41,485
268,595		 61,948
401,084		 94,107
609,303		 160,653
1,040,162		 244,204
1,581,120		 328,095
2,124,275
Maximum Speed
                         
A & B Hub (RPM) 14000 12000 10500 9000 7400 5200 4800 4500 4300 3900 3600 3300 3000
Clamp Hub (RPM) 12000 11000 9500 8000 6700 5200 4800 4500 4300 3900 3600 3300 3000
Misalignments:
                          
Angular Degrees
 3 3 3 3 3 3 3 3 3 3 3 3 3
Parallel:
Inch (mm)
 .004
0.10		 .006
0.15		 .008
0.20		 0.010
0.3		 0.013
0.3		 0.015
0.4		 0.018
0.5		 0.020
0.5		 0.022
0.6		 0.025
0.6		 0.030
0.8		 0.035
0.9		 0.040
1.0
Axial:
Inch (mm)
 .030
9.8		 .036
0.9		 .043
1.1		 0.050
1.3		 0.070
1.8		 0.090
2.3		 0.110
2.8		 0.130
3.3		 0.150
3.8		 0.160
4.1		 0.180
4.6		 0.210
5.3		 0.250
6.4
A Hub
                         
Unit Weight
at Max Bore
Lb. (kg)
 0.43
0.2		 0.88
0.4		 1.37
0.62		 2.0
0.9		 3.6
1.6		 6.4
2.9		 10.5
4.8		 15.3
7.0		 22.0
10.0		 31.3
14.2		 49.9
22.7		 81.5
37.0		 124.0
56.4
Unit Inertia
at Max Bore
lb-in2 (kg-cm2)
 0.16
0.47		 0.49
1.45		 0.93
2.72		 1.9
5.5		 5.6
16.3		 14.6
42.7		 32.4
94.8		 61.3
179		 111
325		 209
612		 461
1349		 1046
3061		 2054
6011
B Hub
                         
Unit Weight
at Max Bore
Lb. (kg.)
 NA 0.96
0.44		 1.37
0.62		 2.5
1.1		 4.2
1.9		 7.2
3.3		 11.4
5.2		 18.4
8.4		 26.5
12.0		 38.5
17.5		 62.6
28.5		 98.3
44.7		 141.0
64.1
Unit Inertia
at Max Bore
lb-in2 (kg-cm2)
 NA 0.66
1.92		 1.21
3.54		 2.8
8.3		 7.9
23.0		 20.0
58.5		 43.2
126		 90.6
265		 163
477		 318
931		 722
2113		 1572
4600		 3100
9070
Clamped Hub
                         
Unit Weight
at Max Bore
Lb. (kg.)
 0.91
0.41		 1.23
0.56		 1.81
0.82		 2.88
1.31		 6.04
2.74		 7.65
3.47		 11.93
5.41		 18.0
8.2		 26.6
12.1		        
Unit Weight
at 1/2 Max Bore
Lb. (kg.)
 0.76
.034		 1.06
0.48		 1.54
0.70		 2.03
0.92		 4.36
1.98		 7.31
3.31		 9.89
4.49		 14.9
6.7		 18.7
8.5		        
Unit Inertia
a Max Bore
lb-in2 (kg-cm2)
 0.44
1.29		 0.73
2.13		 1.47
4.29		 3.11
9.11		 9.62
28.13		 18.0
52.5		 38.9
113.8		 75.6
221.0		 143.69
420.24		        
Unit Inertia
at 1/2 Max Bore
lb-in2 (kg-cm2)
 0.26
0.76		 0.54
1.59		 .98
2.86		 1.69
4.95		 6.20
18.14		 14.4
42.2		 27.3
79.9		 53.0
155.0		 85.1
249.0		        

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 time.

 
 

 

Single Flex Dimensional Information

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Dimensions are for keyway/setscrew style hubs. Click here for Clamp Style Hub
Single Flex Dimension Information

6A18 6A22 6A26 6A30 6A37 6A45 6A52 6A60 6A67 6A77 6A90 6A105 6A120
A Inch
(mm)		 1.85
47.0		 2.25
57.2		 2.59
66		 3.00
76.2		 3.75
95.3		 4.50
114		 5.25
133		 6.00
152		 6.75
172		 7.75
197		 9.00
229		 10.50
267		 12.00
305
B Inch
(mm)		 .625
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		 3.13
79.4		 3.75
95.3		 4.25
108		 4.75
121
C Inch
(mm)		 .276
7.0		 .31
7.8		 .31
7.8		 0.46
11.7		 0.52
13.3		 0.58
14.8		 0.65
16.4		 0.77
19.5		 0.86
21.8		 1.01
25.7		 1.13
28.8		 1.45
37.1		 1.54
39.0
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)		 .79
20.1		 .91
23.1		 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)		 1.53
38.8		 2.18
55.4		 2.43
61.7		 2.96
75		 3.40
86		 3.96
101		 4.52
115		 5.64
143		 6.36
162		 7.26
185		 8.63
219		 9.95
253		 11.04
280
X Inch
(mm)		 0.0
0		 .51
13		 .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
Notes:   
  • For applications such as man lifts, ski/tow lifts, freight /passenger elevators or escalators, consult factory.
  • "X" dimension is the minimum bolt travel required beyond the hub to disassemble the disc pack from the hubs.
  • Rotating equipment is potentially dangerous.  The user should be sure suitable guarding is provided and applicable safety codes are met.

 

 
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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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