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Milwaukee 4079 Diamond Coring Motor The Milwaukee 4079 is a Diamond Coring Motor - 300 600 RPM 20 AMP w Shear Pin. Diamond coring motors are used w Vac - U - Rig® and Dymorig diamond core rigs to drill holes into reinforced con - Home/Family - Home Improvement 487654089 Milwaukee 4079 Diamond Coring Motor crete. This 20 amp model features 4. 8 peak horsepower w a 300 rpm or 600 rpm operating speed. The 4079 uses a shear pin to protect gears and motor against overload. Shear pins are replaced and pins are included w the unit. This unit will handle core bits from 4 to 14 - Inch diameter. Features 2 speeds 300 and 600 rpm 20 amp motor Shear pin protection protects gears and motor Built - in water swivel What's In the Box Milwaukee 4079 Diamond Coring Motor |