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The CB type element is a constricting configuration. In this design, the fabric reinforced elastomeric tube is integrally bonded to the rim I.D. The inward facing Friction Shoe Assemblies (FSA) are attached, via pins through a pad on the elastomeric tube. The FSAs are of a non-ventilating design. The retarding force originating at the friction surface is transmitted as shear through the tube and directly into the tube/rim bonded interface. Because the shear load is transferred through the elastomeric tube and the friction shoes are non-ventilated, these type CB series clutches and brakes are best suited to high speed, low torque applications.
The CB style clutch utilizes an integral rim/tube construction. This unique concept provides versatility and the ability to compensate for less than perfect alignment in the driving system while still delivering a smooth transfer of power. Reliability, low inertia and simplicity of design make the ELASTA-FLEX CB an excellent choice for numerous high-speed, cyclical clutch operations and low-to-medium torque systems. |
 "CB" Clutch Series
 CB & VC Hubs, Drums and Spiders
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"CB" Series Element
 Click on the Size to find the corresponding Part Numbers |
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Dimensions in Inches |
|
Size |
Torque Rating (Tr)(1) (LBS-IN) at 75 PSI |
Max Speed RPM |
A |
A1 |
B(4) |
C |
C1 |
D (BOLT)(2) |
E(3) |
F |
F1 |
G (SHOE) |
|
NO. |
SIZE |
DEG. |
DEG. |
NO. |
WIDTH |
|
4CB |
1,000 |
2000 |
2.625 |
.094 |
7.248 |
6.688 |
4.125 |
8 |
.250 |
.188 |
45.0 |
22.50 |
6 |
2.00 |
|
6CB |
2,040 |
1800 |
2.938 |
.094 |
10.752 |
10.000 |
6.156 |
8 |
.375 |
.313 |
45.0 |
22.50 |
6 |
2.00 |
|
8CB |
4,290 |
1800 |
3.438 |
.094 |
12.875 |
12.125 |
8.156 |
8 |
.375 |
.313 |
45.0 |
22.50 |
8 |
2.50 |
|
10CB |
8,150 |
1800 |
4.125 |
.188 |
15.373 |
14.625 |
10.125 |
12 |
.375 |
.313 |
30.0 |
15.00 |
10 |
3.00 |
|
12CB |
13,300 |
1800 |
4.719 |
.188 |
17.625 |
16.875 |
12.125 |
14 |
.375 |
.313 |
25.7 |
12.86 |
12 |
3.50 |
|
14CB |
19,700 |
1800 |
5.375 |
.188 |
19.625 |
18.875 |
14.125 |
16 |
.375 |
.313 |
22.5 |
11.25 |
14 |
4.00 |
|
Dimensions in Millimeters |
|
Size |
Torque Rating (Tr)(1) (N-m) at 5,2 BAR |
Max Speed RPM |
A |
A1 |
B(4) |
C |
C1 |
D (BOLT)(2) |
E(3) |
F |
F1 |
G (SHOE) |
|
NO. |
SIZE |
DEG. |
DEG. |
NO. |
WIDTH |
|
4CB |
113 |
2000 |
66,8 |
2,39 |
180,1 |
169,9 |
104,8 |
8 |
6,5 |
4,8 |
45,0 |
22,50 |
6 |
50,8 |
|
6CB |
231 |
1800 |
74,7 |
2,39 |
273,1 |
294,0 |
156,4 |
8 |
9,5 |
8,0 |
45,0 |
22,50 |
6 |
50,8 |
|
8CB |
485 |
1800 |
87,4 |
2,39 |
327,0 |
308,0 |
207,2 |
8 |
9,5 |
8,0 |
45,0 |
22,50 |
8 |
63,5 |
|
10CB |
921 |
1800 |
104,6 |
4,78 |
390,5 |
371,5 |
257,2 |
12 |
9,5 |
8,0 |
30,0 |
15,00 |
10 |
76,2 |
|
12CB |
1,500 |
1800 |
119,9 |
4,78 |
390,5 |
371,5 |
257,2 |
14 |
9,5 |
8,0 |
25,7 |
12,86 |
12 |
88,9 |
|
14CB |
2,230 |
1800 |
136,6 |
4,78 |
498,5 |
479,4 |
358,8 |
16 |
9,5 |
8,0 |
22,5 |
11,25 |
14 |
101,6 |
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(1) |
The torque rating varies with applied air pressure and RPM dependent centrifugal force. For static torque multiply by 1.25. |
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(2) |
Single flange shown; dual flange construction available in 12CB and 14CB only. |
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(3) |
Clutch can be supplied with one, two or four side connections or quick release valves. |
|
(4) |
Tolerance |
SIZE |
INCHES or MM |
|
4CB |
+000/-003 inches or +0,000/-0,08 mm |
|
6CB thru 14CB |
+.000/-.005 inches or +0,000/-0,13 mm |
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Warranties are void on all applications which exceed these specifications. All rotating equipment must be protected to comply with OSHA standards. For new applications, Oil States accepts no responsibility and extends no warranty unless the application has been approved in advance. |
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"CB" Series Single Element
 Click on the Size to find the corresponding Part Numbers |
|

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|
Dimensions in Inches |
|
Size |
Torque Rating (Tr)(1) (LBS-IN) at 75 PSI |
Max Speed RPM |
A |
A1 |
B(4) |
C |
C1 |
D (BOLT)(2) |
E(3) |
F |
F1 |
G (SHOE) |
|
NO. |
SIZE |
DEG. |
DEG. |
NO. |
WIDTH |
|
16CB |
35,200 |
1550 |
6.625 |
.188 |
23.500 |
22.500 |
16.188 |
8 |
.50 |
.375 |
45.00 |
22.50 |
10 |
5.00 |
|
18CB |
44,000 |
1400 |
6.625 |
.188 |
22.500 |
24.375 |
18.188 |
12 |
.50 |
.375 |
30.00 |
15.00 |
11 |
5.00 |
|
20CB |
53,600 |
1300 |
6.625 |
.188 |
27.500 |
26.375 |
20.188 |
12 |
.50 |
.375 |
30.00 |
15.00 |
12 |
5.00 |
|
22CB |
62,300 |
1250 |
6.625 |
.188 |
29.500 |
28.375 |
22.188 |
12 |
.50 |
.375 |
30.00 |
15.00 |
13 |
5.00 |
|
24CB |
75,000 |
1200 |
6.625 |
.188 |
31.500 |
30.375 |
24.188 |
16 |
.50 |
.375 |
22.50 |
11.25 |
14 |
5.00 |
|
26CB |
92,400 |
1100 |
6.938 |
.250 |
34.000 |
32.750 |
26.188 |
16 |
.63 |
.500 |
22.50 |
11.25 |
16 |
5.25 |
|
28CB |
106,000 |
1000 |
6.938 |
.250 |
36.000 |
34.750 |
28.188 |
16 |
.63 |
.500 |
22.50 |
11.25 |
17 |
5.25 |
|
30CB |
121,000 |
950 |
6.938 |
.250 |
38.000 |
36.750 |
30.188 |
16 |
.63 |
.500 |
22.50 |
11.25 |
18 |
5.25 |
|
32CB |
137,000 |
900 |
6.938 |
.250 |
40.000 |
38.750 |
32.188 |
18 |
.63 |
.500 |
20.00 |
10.00 |
19 |
5.25 |
|
36CB |
172,000 |
800 |
6.938 |
.281 |
44.625 |
43.125 |
36.188 |
18 |
.75 |
.750 |
20.00 |
10.00 |
22 |
5.25 |
|
40CB |
211,000 |
750 |
6.938 |
.281 |
48.625 |
47.125 |
40.188 |
20 |
.75 |
.750 |
18.00 |
9.00 |
24 |
5.25 |
|
45CB |
260,000 |
670 |
6.938 |
.281 |
53.625 |
52.125 |
45.188 |
24 |
.75 |
.750 |
15.00 |
7.50 |
27 |
5.25 |
|
Dimensions in Millimeters |
|
Size |
Torque Rating (Tr)(1) (N-m) at 5,2 BAR |
Max Speed RPM |
A |
A1 |
B(4) |
C |
C1 |
D (BOLT)(2) |
E(3) |
F |
F1 |
G (SHOE) |
|
NO. |
SIZE |
DEG. |
DEG. |
NO. |
WIDTH |
|
16CB |
3,980 |
1550 |
168,3 |
4,78 |
256,9 |
571,5 |
411,2 |
8 |
12,7 |
9,5 |
45,0 |
22,50 |
10 |
127,0 |
|
18CB |
4,970 |
1400 |
168,3 |
4,78 |
647,7 |
619,1 |
462,0 |
12 |
12,7 |
9,5 |
30,0 |
15,00 |
11 |
127,0 |
|
20CB |
6,060 |
1300 |
168,3 |
4,78 |
698,5 |
669,9 |
512,8 |
12 |
12,7 |
9,5 |
30,0 |
15,00 |
12 |
127,0 |
|
22CB |
7,040 |
1250 |
168,3 |
4,78 |
749,3 |
720,7 |
563,6 |
12 |
12,7 |
9,5 |
30,0 |
15,00 |
13 |
127,0 |
|
24CB |
8,480 |
1200 |
168,3 |
4,78 |
800,1 |
771,5 |
614,4 |
16 |
12,7 |
9,5 |
22,5 |
11,25 |
14 |
127,0 |
|
26CB |
10,400 |
1100 |
176,2 |
6,35 |
863,6 |
831,9 |
665,2 |
16 |
15,9 |
12,7 |
22,5 |
11,25 |
16 |
133,4 |
|
28CB |
12,000 |
1000 |
176,2 |
6,35 |
914,4 |
882,7 |
716,0 |
16 |
15,9 |
12,7 |
22,5 |
11,25 |
17 |
133,4 |
|
30CB |
13,700 |
950 |
176,2 |
6,35 |
956,2 |
933,5 |
766,8 |
16 |
15,9 |
12,7 |
22,5 |
11,25 |
18 |
133,4 |
|
32CB |
15,500 |
900 |
176,2 |
6,35 |
1016,0 |
984,3 |
817,6 |
18 |
15,9 |
12,7 |
20,0 |
10,00 |
19 |
133,4 |
|
36CB |
19,400 |
800 |
176,2 |
7,14 |
1195,5 |
1095,4 |
919,2 |
18 |
19,1 |
19,1 |
20,0 |
10,00 |
22 |
133,4 |
|
40CB |
23,800 |
750 |
176,2 |
7,14 |
1235,1 |
1197,0 |
1020,8 |
20 |
19,1 |
19,1 |
18,0 |
9,00 |
24 |
133,4 |
|
45CB |
29,400 |
670 |
176,2 |
7,14 |
1362,1 |
1324,0 |
1147,8 |
24 |
19,1 |
19,1 |
15,0 |
7,50 |
27 |
133,4 |
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"CB" Series Dual Element
 Click on the Size to find the corresponding Part Numbers |
|

|
|
Dimensions in Inches |
|
Size |
Torque Rating (Tr)(1) (LBS-IN) at 75 PSI |
Max Speed RPM |
A |
A1 |
B(4) |
C |
C1 |
D (BOLT)(2) |
E(3) |
F |
F1 |
G (SHOE) |
|
NO. |
SIZE |
DEG. |
DEG. |
NO. |
WIDTH |
|
12CB |
26,600 |
1800 |
10.125 |
.188 |
17.625 |
16.875 |
12.125 |
14 |
.375 |
.313 |
25.70 |
12.86 |
24 |
3.50 |
|
14CB |
39,400 |
1800 |
11.125 |
.188 |
19.625 |
18.875 |
14.125 |
16 |
.375 |
.313 |
22.50 |
11.25 |
28 |
4.00 |
|
16CB |
70,400 |
1550 |
13.625 |
.188 |
23.500 |
22.500 |
16.188 |
8 |
.50 |
.375 |
45.00 |
22.50 |
20 |
5.00 |
|
18CB |
88,000 |
1400 |
13.625 |
.188 |
22.500 |
24.375 |
18.188 |
12 |
.50 |
.375 |
30.00 |
15.00 |
22 |
5.00 |
|
20CB |
107,200 |
1300 |
13.625 |
.188 |
27.500 |
26.375 |
20.188 |
12 |
.50 |
.375 |
30.00 |
15.00 |
24 |
5.00 |
|
22CB |
124,600 |
1250 |
13.625 |
.188 |
29.500 |
28.375 |
22.188 |
12 |
.50 |
.375 |
30.00 |
15.00 |
26 |
5.00 |
|
24CB |
150,000 |
1200 |
13.625 |
.188 |
31.500 |
30.375 |
24.188 |
16 |
.50 |
.375 |
22.50 |
11.25 |
28 |
5.00 |
|
26CB |
184,800 |
1100 |
14.250 |
.250 |
34.000 |
32.750 |
26.188 |
16 |
.63 |
.500 |
22.50 |
11.25 |
32 |
5.25 |
|
28CB |
212,000 |
1000 |
14.438 |
.250 |
36.000 |
34.750 |
28.188 |
16 |
.63 |
.500 |
22.50 |
11.25 |
34 |
5.25 |
|
30CB |
242,000 |
950 |
14.438 |
.250 |
38.000 |
36.750 |
30.188 |
16 |
.63 |
.500 |
22.50 |
11.25 |
36 |
5.25 |
|
32CB |
274,000 |
900 |
14.438 |
.250 |
40.000 |
38.750 |
32.188 |
18 |
.63 |
.500 |
20.00 |
10.00 |
38 |
5.25 |
|
36CB |
334,000 |
800 |
14.438 |
.281 |
44.625 |
43.125 |
36.188 |
18 |
.75 |
.750 |
20.00 |
10.00 |
44 |
5.25 |
|
40CB |
422,000 |
750 |
14.438 |
.281 |
48.625 |
47.125 |
40.188 |
20 |
.75 |
.750 |
18.00 |
9.00 |
48 |
5.25 |
|
45CB |
520,000 |
670 |
14.438 |
.281 |
53.625 |
52.125 |
45.188 |
24 |
.75 |
.750 |
15.00 |
7.50 |
50 |
5.25 |
|
Dimensions in Millimeters |
|
Size |
Torque Rating (Tr)(1) (N-m) at 5,2 BAR |
Max Speed RPM |
A |
A1 |
B(4) |
C |
C1 |
D (BOLT)(2) |
E(3) |
F |
F1 |
G (SHOE) |
|
NO. |
SIZE |
DEG. |
DEG. |
NO. |
WIDTH |
|
12CB |
3,010 |
1800 |
257,2 |
4,78 |
447,7 |
428,6 |
308,0 |
14 |
9,5 |
8,0 |
25,7 |
12,86 |
24 |
88,9 |
|
14CB |
4,450 |
1800 |
282,6 |
4,78 |
498,5 |
479,4 |
358,8 |
16 |
9,5 |
8,0 |
22,5 |
11,25 |
28 |
101,5 |
|
16CB |
7,960 |
1550 |
346,1 |
4,78 |
596,9 |
571,5 |
411,2 |
8 |
12,7 |
9,5 |
45,0 |
22,50 |
20 |
127,0 |
|
18CB |
9,940 |
1400 |
346,1 |
4,78 |
647,7 |
619,1 |
462,0 |
12 |
12,7 |
9,5 |
30,0 |
15,00 |
22 |
127,0 |
|
20CB |
12,100 |
1300 |
346,1 |
4,78 |
698,5 |
669,9 |
512,8 |
12 |
12,7 |
9,5 |
30,0 |
15,00 |
24 |
127,0 |
|
22CB |
14,100 |
1250 |
346,1 |
4,78 |
749,3 |
720,7 |
563,6 |
12 |
12,7 |
9,5 |
30,0 |
15,00 |
26 |
127,0 |
|
24CB |
17,000 |
1200 |
346,1 |
4,78 |
800,1 |
771,5 |
614,4 |
16 |
12,7 |
9,5 |
22,5 |
11,25 |
28 |
127,0 |
|
26CB |
20,900 |
1100 |
362,0 |
6,35 |
863,6 |
831,9 |
665,2 |
16 |
15,9 |
12,7 |
22,5 |
11,25 |
32 |
133,4 |
|
28CB |
24,000 |
1000 |
366,7 |
6,35 |
914,4 |
882,7 |
716,0 |
16 |
15,9 |
12,7 |
22,5 |
11,25 |
34 |
133,4 |
|
30CB |
27,300 |
950 |
366,7 |
6,35 |
956,2 |
933,5 |
766,8 |
16 |
15,9 |
12,7 |
22,5 |
11,25 |
36 |
133,4 |
|
32CB |
31,000 |
900 |
366,7 |
6,35 |
1016,0 |
984,3 |
817,6 |
18 |
15,9 |
12,7 |
20,0 |
10,00 |
38 |
133,4 |
|
36CB |
38,900 |
800 |
366,7 |
7,14 |
1195,5 |
1095,4 |
919,2 |
18 |
19,1 |
19,1 |
20,0 |
10,00 |
44 |
133,4 |
|
40CB |
47,700 |
750 |
366,7 |
7,14 |
1235,1 |
1197,0 |
1020,8 |
20 |
19,1 |
19,1 |
18,0 |
9,00 |
48 |
133,4 |
|
45CB |
58,800 |
670 |
366,7 |
7,14 |
1362,1 |
1324,0 |
1147,8 |
24 |
19,1 |
19,1 |
15,0 |
7,50 |
54 |
133,4 |
|
(1) |
The torque rating varies with applied air pressure and RPM dependent centrifugal force. For static torque multiply by 1.25. |
|
(2) |
Single flange shown; for dual flange construction multiply by 2 (12CB and 14CB only). |
|
(3) |
Clutch can be supplied with one, two or four side connections or quick release valves. |
|
(4) |
Tolerance |
SIZE |
INCHES or MM |
|
16CB thru 24CB, 28CB & 32CB |
+000/-005 inches or +0,000/-0,13 mm |
|
26CB & 30CB |
+.000/-.008 inches or +0,000/-0,20 mm |
|
36CB thru 45CB |
+.000/-.010 inches or +0,000/-0,25 mm |
|
Warranties are void on all applications which exceed these specifications. All rotating equipment must be protected to comply with OSHA standards. For new applications, Oil States accepts no responsibility and extends no warranty unless the application has been approved in advance. |
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