Includes hand-held,core drill(rig-mounted),and large stationary(pedestal)models.Core drills use hollow diamond core bits to extract intact cylindrical samples.Powered by hydraulic,electric,or pneumatic systems,providing smooth,high-torque output.Typically equipped with a water connection for wet drilling to cool the bit,reduce dust,and extend bit life.Large rigs are fixed to walls/floors via guide columns and clamps,ensuring perpendicular accuracy and safety.Stepless speed control adapts to different concrete hardness.
Specified by max drilling diameter(e.g.,Φ32mm,Φ100mm,Φ200mm,Φ500mm)and depth.Motor power ranges from 1.5kW to over 10kW.Spindle speed is adjustable,typically 200-3000 rpm.Core drills are also specified by column stroke(e.g.,400mm,1000mm)for single-pass depth.Weight ranges from tens to hundreds of kilograms.
Widely used in building installations(MEP penetrations),structural strengthening(rebar planting,anchors),quality testing(extracting cores for strength tests),tunnel construction(drainage holes,rock bolt holes),and municipal works(road coring).It is an essential tool for post-processing and modifying concrete structures.
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