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CB
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Catalog excerpts

CB - 1

Single Flange Element The type CB element assembly is designed and built to provide dependable clutch or brake service in the most exacting industrial applications. It is suited to high speed, cyclic operations, as well as for coupling and general power transmission. CB design, construction and operation is quite simple. A neoprene rubber tube reinforced with several plys of cord is bonded on its outside diameter to a steel rim. Friction shoes are attached to the tube’s inside diameter by pins which in turn are held in position by lockwires, except for sizes 3CB150 through 5CB200 which have friction material bonded to the rubber tube. Pressurizing the tube forces the friction shoes to engage around a cylindrical drum. Element torque capacity is dependent upon the applied pressure and rotating speed. Catalog ratings are given at 75 psi (5.2 bar) Dual Flange Element and zero rpm. Maximum recommended pressure is 110 psi (7.6 bar). Adjustment for speed is explained under Selection Procedure. 16CB500 and larger have rims with two flanges. CB elements are grouped and described as being single flanged or dual flanged elements. CB elements are available in 20 sizes which are identified by the drum diameter in inches on which they constrict and the width in inches of its friction lining. For instance, size 16CB500 is designed to constrict on a 16 inch diameter drum and has a friction lining width of 5 inches. The smallest CB element will constrict on a 3 inch (76mm) diameter drum and the largest on a 45 inch (1143mm) diameter drum. Two dual flanged elements can be bolted together to form a dual element having twice the torque capacity of a single element. Dual elements can be furnished in sizes 12CB350 through 45CB525. Element sizes 3CB150 through 10CB300 have rims with one flange. Element sizes 12CB350 and 14CB400 are normally furnished with rims having one flange; however, they can also be furnished, when specified, with two flanges. Element sizes Because the rubber tube is the connecting member between the driving and driven shafts, the CB design offers the following features in addition to the constricting features described earlier in this section. Copyright Eaton Corporation, 1995, All rights reserved.

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CB - 2

CB Features Split Elements One moving component The tube is the only moving component. There are no springs or sliding parts. Cushioned action The tube transmits the torque through its side walls, cushioning damaging shock loads thereby protecting drive components. The rubber tube construction dampens the effects of torsional vibrations. Element sizes 6CB200 and up are available in a split configuration. They are used in applications where there is limited axial space for maintenance or where the drum is mounted between bearings and the shaft cannot be moved for maintenance. Sizes through...

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CB - 3

Component Description Optional - Quick Release Valve Muffler Compression Ring Air Connection Gasket Optional - Quick Release Valve Assembly Elbow Assembly Friction Shoe Assembly Air Tube Group (Dual Mounted) Spacer Group (Dual Mounted) Shoe Pin Lockwire Friction Shoe Replacement Kit Ê This option not available for sizes 3 thru 14. Ë These items are not applicable to sizes 3 thru 5. The friction material is bonded to the rubber tube and is not replaceable. Copyright Eaton Corporation, 1995, All rights reserved.

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CB - 4

CB Element Part Numbers A double alpha suffix is added to the basic element part number to completely describe the element configuration. Alpha Suffixes for 3 thru 14 CB Elements No. of Valves or Special Rim Fea- Alpha Suffixes Side Connections Type of Lining tures Valves Only Standard With Side Connections The basic element part number is shown on the element catalog pages. Alphas for the more common element configurations are shown on this page. The element part number used in the above example identifies a 16CB500 element equipped with standard friction linings and one side connection....

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CB - 5

Single CB Elements Form CB-401 Technical Data – Sizes 3 to 14 Ê Refers to basic part number only. When ordering, the number of air inlets and type of connection must be specified. Ë Dynamic torque shown, static torque approxi- mately 25% greater. Torque in each application is dependent upon air pressure and speed. Part Number Maximum Speed Cs Centrifugal Loss Constant Weight Mass Friction Area Friction Lining Thickness New Minimum Drum Diameter 74 Î Maximum rpm is dependent upon operating conditions and varies for each application. Consult factory for applications exceeding these speeds. Ï...

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CB - 6

Single CB Elements Form CB-401 Dimensional Data – Sizes 3 to 14 Torque Rating Copyright Eaton Corporation, 1995, All rights reserved.

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CB - 7

Single CB Elements Form CB-402 Technical Data – Sizes 12 to 45 lb⋅in @ 75 psi Part Number Ê Refers to basic part number only. When ordering, the number of air inlets and type of connection must be specified. Ë Dynamic torque shown, static torque approxi- mately 25% greater. Torque in each application is dependent upon air pressure and speed. Maximum Speed Cs Centrifugal Loss Constant Friction Area Í American National Pipe Thread. Sizes 12 and 14 available with one or two air inlets. All other sizes available with one, two or four air inlets. Friction Lining Thickness New Minimum Drum...

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CB - 8

Single CB Elements Form CB-402 Dimensional Data – Sizes 12 to 45 D2 lb⋅in Dimensions in inches @ 75 psi Part Number Torque Rating Copyright Eaton Corporation, 1995, All rights reserved.

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CB - 9

Dual CB Elements Form CB-403 Technical Data – Sizes 12 to 45 lb⋅in @ 75 psi Cs Centrifugal Loss Constant Minimum Drum Diameter Friction Area Part Number Torque Rating Ê Refers to basic part number only. When ordering, the number of air inlets and type of connection must be specified. Ë Dynamic torque shown, static torque approxi- mately 25% greater. Torque in each application is dependent upon air pressure and speed. Maximum Speed Í American National Pipe Thread Sizes 12 and 14 available with two air inlets. All other sizes available with two or four air inlets. Friction Lining Thickness...

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