Hydraulic Nut PG 12
The distinguishing feature of the Hydraulic Nuts of product group 12 is that the axial pretensioning force is produced by a differential piston and is maintained by an incorporated lock nut and that the hydraulic pressure may be released.

Main Features


  • single-stage
  • also used to generate axial displacement forces
  • mechanical locking
  • differential piston

Advantages of PG
  • smaller geometric dimensions compared with PG 11
  • short thread overhang
  • high pre-tensioning force at smallest outer diameter
  • stable piston guidance
  • pre-tensioning force is maintained without pressure

Examples of Applications
  • wherever shortest possible assembly or disassembly
    times are required
  • mining
  • press construction

More Hydraulic Nuts

We distinguish our Hydraulic Nuts into 5 different product groups (designs)
which, in principle, have all the same function.