In machining, it is often necessary to drill holes in shaft-type workpieces. Here is a simple way to align the drill bit when drilling a shaft workpiece. First, the shaft workpiece is placed on the vise 4 to be clamped, and the double-sided blade 2 is placed on the workpiece 3 under the drill bit 1. The drill bit is adjusted so that the chisel edge is parallel to the axis of the shaft workpiece, and then the cross blade is lightly Light top knife
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