Clamp locking devices

Clamp locking devices allow the shaft integral connection with hub.

SIT-LOCK® Keyless locking devices

Calettatori per attrito ideali per ogni applicazione di collegamento albero-mozzo. Possono fissare qualsiasi corpo di mozzo, volani, ruote per catena, ingranaggi, leve, pulegge, giunti ecc. Disponibili a magazzino una vasta gamma di calettatori SIT-LOCK® che consentono di coprire una ampia gamma di applicazioni.


  • Cost reduction
  • Suitable for innovative applications
  • Excellent axial and angular positioning
  • Suitable for acceleration and deceleration management
  • Backlash-free
  • Easy mounting la riduzione dei costi dell’assieme

Self-locking bushing SERLOCK®

SERLOCK® is our patented innovative locking system that mixes the usual advantages of a standard clamping device with the versatility of taper bushings. This series grants full interchangeability with any type of taper bushing, including our SER-SIT® bushings.

Available sizes: 1108, 1210, 1610, 2012, 2517 and 3020, with bore diameters from 12mm up to 70mm.


  • Backlash-free
  • Easy mounting
  • Cost efficient, since no further machining is required

SER-SIT® taper bushings

SER-SIT® taper bushings allow to assemble and dismantle pulleys and other transmission units easily and quickly, using just an Allen wrench.


  • No clearance between shaft and bore
  • Easy and quick mounting
  • High interchangeability with other widespread taper bushings

If application is characterised by strong vibrations, we highly recommend to check at regular time intervals the tightening of screws after running a few hours. Manufacturer won’t and can’t be held responsible for any consequences deriving from accidental unscrewing during use. 
Our technical department is at your complete disposal for further information.  

Contact us for more information