Z7a type locking connection plate (produced by JB / T 7934-1999)

● The Z7 expansion sleeve is a keyless coupling between the shaft and the sleeve. This device can exert a clamping force from the outer sleeve to form a mechanical compression fit between the shaft and the sleeve, and transmit torque and The sleeve itself does not pass any moments and loads.

• When the expansion sleeve is secured to the appropriate position of the hub, the bolts are tightened at a given moment, and the tapered inner ring applies radial force to the sleeve. This forced friction connection allows safe transmission of large torque and load

● expansion sleeve clamping, the mating surface pressure is very large and completely sealed, to avoid the surface with the rust. When disassembling, loosen the bolt, the mating surface is automatically loosened, the sleeve and the conical ring automatically return to the original size

● This device is easy to disassemble, suitable for low-speed transmission torque

■ tag example

Diameter d = 140mm, outside diameter D = 230mm Z7B type expansion joint: expansion sleeve Z7B-140 × 230 JB / T7934-1999

■ Z7 expansion sleeve is divided into three series

● Z7A type - light series double cone lock disc type

● Z7B type - standard series double cone locking disc type, preferred series

● Z7C type - heavy series double cone locking disc type

Install the reference example

• Z20 type expansion joint sets
• Z12C type expansion sleeve