Upgrade your mechanical transmission systems with the Z21 Expansion Sleeve. This advanced connection component utilizes the mechanical wedge principle to create a powerful, rigid interference fit between the shaft and the hub such as gears, sprockets, or timing pulleys.

How It Works: By tightening the high-strength locking bolts, the inner and outer tapered rings slide against each other. This action converts the axial screw force into massive radial contact pressure, locking the components together purely through friction.