Advanced Machine & Engineering
Hydraulic RCH Rod Clamps

Key Features

  • Can Be Mounted to Any Machine Structure
  • Actuated by a spring/collet mechanism and unclamped by hydraulic pressure
  • Standard housing can be custom-designed to suit your application
  • Double-Acting

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AMLOK for Hydraulic Cylinders

The AMLOK Hydraulic Series RCH Rod Clamp has been developed to provide power-off clamping of rods and shafts. The type RCH Rod Clamps are actuated by a spring/collet mechanism and unclamped by hydraulic pressure. These rod clamps are designed to clamp components after the motion has stopped and to hold the position securely as long as the forces do not exceed the table values. For braking applications, contact us.

The mountings of the RCH AMLOK Rod Clamp have been designed to apply to standard heavy duty NFPA-style MF1 cylinders. The standard housing can be mounted to any machine structure or be custom-designed to suit your application.


The AMLOK Rod Clamp consists of an alloy steel housing containing a special locking mechanism actuated by a set of disc springs. The clamp is unlocked when hydraulic pressure actuates a piston that compresses the disc springs, and releases the locking device. Since the locking of the AMLOK Rod Clamp is accomplished mechanically and unlocked by hydraulic pressure, loss of hydraulic pressure to the rod clamp will cause the unit to lock.

The holding force depends upon the rod diameter and the amount of hydraulic pressure (PSI) available for unclamping. The AMLOK is preset at the factory to release at the specified hydraulic pressure. The available holding forces are listed in the chart and can be multiplied by adding additional AMLOK clamps to the same rod. Also, special SITEMA Safety Catchers and Locking Units can be provided to suit your needs.