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Locking Cylinders



Locking or bolting cylinders are safety devices on cranes. They are used to bolt the boom extension or the main boom. The necessary bolts are integrated in the design of our cylinders.


  •    -  Very reliable anti-leakage features
  •    -  Visually appealing and robust construction
  •    -  For use under the harshest conditions
  •    -  Low-temperature service
  •    -  Good cost-effectiveness for the customer

Technical Data

Piston diameter mm Rod diameter mm Stroke length mm Locking­-bolt diameter, max. mm
38…50 20…36 110 170

The above details are guideline values taken from previously developed products. If your requirements do not fit into this framework, we will find the best solution for your application.


  •    -  Double-acting cylinder with locking bolts
  •    -  Bolts manufactured from high-strength steels, in line with their vital safety-related function
  •    -  Optional positioning device for proximity switch
  •    -  Optional integral linear position-measurement system
  •    -  With optional version for low-temperature service
  •    -  Optional integral check valves
  •    -  Rod options: induction hardened and hard-chrome-plated to size or nitrided


  •    -  Telescopic booms