There are special devices for sharpening dull or broken drill bits If they are not at hand then try under a rotating drill bit set suitable abrasive (e.g. abrasive wheel) at an angle of 30 or 45 degrees — and the drill will self-sharpening.
Recommend to read
TRAINING PILOTAGE
Control line model airplane. Analysis editorial reader mail shows that in recent years there has been increasing interest in modeling. We write and call the Pope in the memory of which...
Insurance for drill
Drill chuck, in particular manual, is not always able to keep the drill from turning when machining hard metals or release of the cutting edges of metal. It solves the problem of the...
