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　　The Z2 type expansion 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 does not move axially relative to the hub when tightening. , Compared with the Z1 type, the same pressing force can produce greater radial pressure...

　　The inner and outer cone rings of the Z3 type expansion sleeve are tightened with hexagon socket bolts, which can transmit large loads, and there is a disassembly threaded hole on one cone ring; the joint surface is longer, the neutrality is good, and it is suitable for high rotation accuracy requirements and large transmission Load occasions....