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Help CenterPneumatic Clutch Mechanical Press
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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) and zero rmp. Maximum recommended pressure is 110 psi(7.6 bar). Adjustment for speed is explained under Selection Procedure.
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.
Element sizes 3CB150 through 10CB300 have rims with one flange. Element sized 12CB350 and 14CB400 are normally furnished with rims having one flange; however, they can also be furnished, when specified, with two flanges. Element sized 16CB500 and larger have rims with two flanges. CB elements are grouped and described as being single flanged or dual flanged elements.
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.
Because the rubber tube is the connect 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.
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