I like this Milwaukee 4096 Diamond Coring Motor 450/900 RPM, 20 Amp with Clutch

Milwaukee 4096

Diamond coring motors are used with Vac-U-Rig and Dymorig diamond core rigs to drill holes into reinforced concrete. This 20 amp model features 4.8 peak horsepower with a 450 rpm or 900 rpm operating speed. The 4096 has a clutch to protect gears and motor against overload. This unit will handle core bits from 2 in. to 10 in. in diameter. Speed Milwaukee 4096 - No Load (RPM): 450 / 900, Volts: Milwaukee 4096 120, Max This 20 Amp model features 4.8 peak horsepower with a 450 or 900 RPM operating speed Diamond coring motors are used with Vac-U-Rig and Dymorig diamond core rigs to drill holes into Milwaukee 4096 reinforced concrete Built-In Water Swivel, Water Hose Adapter Limited warranty, Milwaukee 4096 30-day no-risk trial ... »» Read more...

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