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ETP Classic from Lenze Ltd

General purpose locking bush

ETP-CLASSIC is used in a wide variety of applications to fix hubs, cams, gears and sprockets to shafts. The connection is steplessly adjustable, both radially and axially, and backlash free.  ETP-CLASSIC suits shafts from 15 to 100mm.

ETP-CLASSIC consists of a double walled, hardened steel sleeve (filled with a pressure medium), a seal, a piston and a flange with retaining screws.

When the screws are tightened, the sleeve expands evenly along the shaft and hub and creates a secure connection. After the screws are slackened, the sleeve returns to its original dimensions and can be easily removed.

For dimensions and performance data go to Support & Links and click on CAD-File.


  • Compact installation dimensions and moderate surface pressure allow small outside hub diameter.
  • Fast assembly and disassembly
  • Precise hub setting can be carried out during assembly.
  • Low screw-tightening torque and few screws allow the simplest assembly.
  • Good concentricity accuracy, even after being fitted and removed multiple times
  • ETP-CLASSIC is equipped with socket screws, however hexagon bolts are also available as accessories.