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ETP Techno from Lenze Ltd

Precision locking bush

ETP-TECHNO is specially designed for applications where high precision together with frequent changes and adjustments are needed.  ETP-TECHNO locking brush gives very high concentricity and can be mounted/dismounted thousands of times.  Shaft sizes are 15 to 100mm.

ETP-TECHNO is made up of a double wall, hardened steel sleeve filled with a pressure medium and a flange part. In the flange there is a press/pressure mechanism, which consists of a screw and piston with a double sealing function, an O-ring and a steel ball, which press against a spherical seat. The outside (D) and inside diameter (d) and the plane surface of the hub-side flange are machined for extremely smooth running. The piston and the cylinder are designed to cope with several thousand assembly/disassembly cycles.

When the pressure screw is tightened, the double walled sleeve extends evenly along the shaft and hub and creates a secure connection. After the pressure screw is slackened, the ETP-TECHNO returns to its original dimensions can be easily removed.


Thanks to the unique hydraulic principle, this system offers a number of advantages:

  • Fast assembly/disassembly. Only one screw has to be tightened.
  • Extremely good concentricity accuracy, even after several assemblies
  • Can be assembled/disassembled more than 1000 times
  • Can even be fitted in installations where space is at a premium. The pressure screw is tightened radially to the shaft
  • Small mounting dimensions
  • The hub can be easily and accurately adjusted.