Z Type Shrink Disc

Z1 Type Locking Assembly is a double conical‑ring keyless locking assembly designed for shaft‑hub connection. It is supplied without integrated flange and clamping screws, requiring an external thrust‑ring assembly to provide axial compression force.
 
This design allows multiple assemblies to be stacked in series to increase torque capacity. Z1 type is widely used in power transmission machinery and equipment where reliable keyless connection, high coaxial accuracy, and easy installation are required.
 
- Double conical‑ring keyless connection

- Self‑centering design ensures high coaxial accuracy

- Supplied without flange and clamping screws

- External thrust‑ring assembly required for axial compression

- Multiple assemblies stackable to increase torque capacity

- Maximum 4 assemblies for single‑side compression

- Up to 8 assemblies for double‑side compression

- Easy installation, adjustment and disassembly

- No key‑way required, avoids shaft weakening

- Overload‑protective, slipping occurs under overload

- Suitable for applications with limited radial space
 
Specifications
Standard: JB/T 7934‑1999
Type: Z1 Locking Assembly
Structure: Double conical ring
Connection: Keyless friction connection
Centering: Self‑centering
Flange: No built‑in flange
Clamping Screws: No built‑in clamping screws
Installation: Requires external thrust‑ring assembly
 
Recommended Tolerances:
‑ Shaft diameter ≤ 38 mm: Shaft h6, Hub bore H7
‑ Shaft diameter ≥ 40 mm: Shaft h8, Hub bore H8
 
Surface Roughness:
‑ Rz ≤ 16 μm
 
Stacking:
‑ Multiple assemblies can be stacked in series
‑ Torque capacity increases with stacking, but not linearly

Note:
Z1 locking assembly has no built‑in gas‑tight sealing function.