When drilling the center hole, the center of the lathe tailstock is inconsistent with the rotation center of the workpiece, or excessive force, high plasticity of the workpiece material, and chip clogging. It often causes the center drill to break in the center hole and is not easy to remove.
If the method of enlarging the central hole is adopted, the central hole will change its original size and fail to meet the quality requirements. At this time, as long as a sharpened steel wire is used, insert the tip into the chip pocket of the drill tip in the center hole. After a few strokes, when the drill tip moves, it will be sucked by the magnet or magnetic table base and broken in the center hole. The center drill tip inside is taken out.
