Z1–Z9TIANIU
Locking Assemblies .
Z1–Z9 Series Locking Assemblies (types to JB/T 7934-1999)
Tianiu locking assemblies for keyless shaft–hub connections: torque and axial force are transmitted by friction from tapered-ring interference. Type codes follow Chinese standard JB/T 7934-1999 (now GB/T 28701-2012). Z1 is a pair of tapered rings clamped by a pressure flange (shaft 10–500 mm, up to 278 kN·m); Z2 is the most widely used type (shaft 20–1,000 mm, up to 2,000 kN·m); Z3 is self-centring; Z4, Z5, Z8 and Z9 are assemblies with their own screws; Z7A–Z7C are shrink discs clamping the hub onto the shaft from outside, up to 8,300 kN·m; Z7D is a sleeve coupling rigidly joining two shafts.
Applications
- Keyless mounting of gears, pulleys and sprockets on shafts
- Connecting coupling hubs and flanges to shafts
- Shaft-mounted reducers with hollow shaft (Z7A–Z7C shrink discs)
- Rigid shaft-to-shaft connection (Z7D)
Specifications
- Types
- Z1, Z2, Z3, Z4, Z5, Z7A–Z7C (shrink discs), Z7D (shaft-to-shaft), Z8, Z9
- Shaft diameter
- 10–1,000 mm (Z1: 10–500 mm, Z2: 20–1,000 mm)
- Transmissible torque
- 0.007–8,300 kN·m (Z2 up to 2,000 kN·m, Z7B up to 8,300 kN·m)
- Axial force
- 1.4–21,840 kN
- Locking screws
- M6–M33, tightening torque 14–2,200 N·m
- Pressure on shaft
- up to 287 N/mm²
- Type standard
- JB/T 7934-1999 (superseded by GB/T 28701-2012)