The new MMPRD is a purpose built lightweight portable drill weighing only 4.8 kg (10.5 lbs) powered by a quiet, easy starting, powerful, reliable but lightweight 27cc two-stroke motor driving one of our hard-wearing water lubricated diamond tipped drill bits. The lightweight motor develops 0.8kW (1.1 HP) and drives through a 2 speed gearbox giving optimal drilling speeds of 910 or 2710 RPM . The optimum drilling speed for 1″ diamond corers is about 2500 rpm in medium to soft rocks and about 1000 RPM for very hard rocks. One customer reports using the same drill bit for 3 major collecting trips (over 1000 cores) and it “still had plenty of life left in it”. The MMPRD is controlled by a convenient finger trigger on the rear handle and there is a button operated lock to keep the throttle partially open when starting from cold. The front handle can be left or right hand mounted and the fuel tank has a large capacity allowing long periods of uninterrupted drilling.
The MMPRD comes complete with a pressurised water container and quick release hose fittings.
Wide selections of suitable diamond core bits up to 4” in diameter are available at competitive prices. Non-standard core bits can be supplied at short notice.