Compared with the Z4 type, the Z2 type expansion coupling sleeve has a long joint surface and high centering accuracy. It is used in the occasions where the rotation accuracy is higher and the transmission of larger loads is required. The Z4 type expansion sleeve is composed of a split double cone inner ring with different tapers, a split double cone outer ring and two double cone compression rings, which are locked with hexagon socket bolts.
Z3 type expansion coupling sleeve characteristics: Z3 type expansion inner and outer cone rings are tightened with hexagon socket bolts, which can transmit larger loads, and there is a disassembly threaded hole on a cone ring; Z3 type has a longer joint surface, good neutrality, and is applicable It is used in occasions where high rotation accuracy is required and large loads are transmitted.
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. In order to facilitate disassembly, the Z2 type expansion sleeve has screw holes for disassembly on a compression ring, with a total of 2 to 4 points along the circumference.