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HEU Hydraulic Expansion Unit


DYNASET HEU Hydraulic Expansion Unit uses the hydraulic power of mobile machinery for rock bolt expansion.

It is a compact easy to install unit to provide bolt expansion for bolters and other mining and tunneling machinery. HEU can be used for manual or fully automatic bolting.

HEU is easy and fast to use. It automatically monitors the expansion and provides reliable expansion of the bolt.


HEU can be installed on to any drilling machine. It is compact, easy to install. Only hydraulic pressure, return lines and water supply are need to be attached. The expansion head is available either for manual pistol use or as an attachment on to the bolter.


HEU Hydraulic Expansion unit uses base machine’s hydraulic system. When the hydraulic oil flow is turned on the unit is ready to operate and the expansion can be started. The HEU unit monitors the expansion and releases the bolt automatically when correct pressure level is reached.


HEU enables rock bolt usage for large variety of mining machinery. With the compact design, it fits even into the smallest machines. HEU unit can be installed for manual, hand operated, use or for automatic operation. It is reliable, fast and easy to use.

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