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
Georgia tourist
Georgia — the country is amazing, not just amazing, but, unfortunately, unfairly deprived of attention. Tourists in Tbilisi should visit the cable car, which immediately attracts...
AUDIO CONTROLLER
From Nickel-cadmium batteries with a life expectancy of 100-200 cycles of charge-discharge. Discharge below 1V per cell leads to a sharp reduction in the duration of battery life. How to...
