Boart Longyear Canada


• Direct drive feed frame with 70kN pullback and 1.8m standard feed stroke. Optional 1m or 1.5m feed stroke for confined spaces.
• Standard Power Pack with 75kW electric motor. 55kW and 90kW electric motor or 99kW diesel engine are also available as options.
• Standard Self contained control panel with stand and e-stop.
• Standard Feed Frame Positioner and Turntable (option).
• HQ™ (HQ™ high torque optional) rotation unit with chuck assembly.
• HQ™ (PQ™ optional) rod clamp; spring close and hydraulic open.
• Semi-automated rod handler (optional).


The LM™75 is a mid-sized drill rig for underground diamond coring. It is equipped with a 70kN feed frame for medium hole depth. It is modular in design with a number of options which make it easier to tailor to specific needs and to upgrade when requirements change. With the assistance of a positioner and a turntable the drill is capable of drilling holes in all angles from vertically up to vertically down. The drill uses an electric motor (diesel engine optional) to power the hydraulics on the machine.


1. Load Sensing Hydraulics
Load sensing hydraulics maximize efficiency and reduce heat

2. Proportional Controls
Proportional controls and lock levers provide optimum control of rpm and feed

3. High Torque Breakout
Automated high torque break out device breaks most rod joints automatically

4. Fail Safe Rod Clamp
Hydraulic open and spring close rod clamp results in fail safe operation

5. Direct Coupled Feed Frame
Direct coupled feed frame results in lower maintenance and smoother feed transmission

6. Semi-Automated Rod Handling (Optional-Not Pictured)
Semi-automated rod handler (optional) makes handling of rods safer and easier.


LM™75 Underground Drill Technical Overview