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HEU Hydraulic Expansion Unit

Key Benefits

A compact and easy to install unit to provide bolt expansion for bolters, and other mining and tunneling machinery.

  • Reliable bolt expansion
  • Easy to install
  • Can be used with different bolt sizes because of adjustable pressure level
  • Safe and easy to operate
  • Two-year or 2000 hour warranty


Hydraulic Expansion Unit can be operated manually with a pistol or by machine.


  • Rock bolt expansion

How Does The Hydraulic Expansion Unit Work?

HEU Hydraulic Expansion unit utilizes base machine’s hydraulic system as power source.

  1. Hydraulic oil flow is led to the unit through the pressure line
  2. The unit produces high-pressure water that is used for expanding rock bolts. The unit is connected to water supply for the operation.
  3. The unit monitors the expansion and releases the bolt automatically when the correct water pressure level is reached.
  4. The hydraulic oil is led back to carrier machine’s hydraulic oil tank through the return line

Suitable machinery

Mining Machines

Used in industries

Drilling, Mining and Quarrying

Technical details

  • Rock bolt expansion pistol (suitable for 30/40mm expander bolts)
  • Rock bolt expansion tools (stainless steel, water hydraulic controlled)
    Expander bolt size 30/40mm
  • Rock bolt expansion tools (stainless steel, oil hydraulic controlled)
    Expander bolt size 30/40mm


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