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　　The Z17A type expansion coupling sleeve is composed of an open double-cone inner ring, an open double-cone outer ring and two double-cone compression rings. It is tightened with an inner hexagonal bolt, and the elastic ring is not axially relative to the hub when tightened. Moving, the same pressing force can generate greater radial pressure and transmit...

　　The Z18 type expansion coupling sleeve (referred to as the expansion sleeve) is an advanced basic component widely used in the world for mechanical connection under heavy loads. In the connection between the wheel and the shaft, it is produced by tightening the high-strength seat bolts. A kind of pressure and friction to achieve load transmission...