Schaeffler North America


Technical Product Information | 2014-10
HMZ Locknuts
simple and reliable locking devices


HMZ locknuts allow precise and secure axial location of bearings on the shaft and are already in use in a large number of wind turbines.

  • No retention groove on the shaft required (no notch effect, higher strength, reduced costs)
  • Simplified mounting as fitting of the retaining element is no longer required
  • Secure retention due to axial clamping screws
  • Bearings can be locked in any axial position
  • Full interchangeability with conventional locknuts


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