A couple of years ago witnessed a familiar locksmith sharpening drill a very easy way. First, I do not quite understand what he did do, but he later explained to me that it is improvised express - method of sharpening drills "in haste." Using this method, I want to tell you below.
I have over time had accumulated a lot of blunt drills. Some dumb before that even wood drill refuse. ) I decided to try to sharpen the express - way familiar locksmith.
So, what will it take?
Require a low speed drill or screwdriver, a piece of sandpaper on a fabric basis with an average grain size, and of the drill itself, you want to sharpen. In my hand I was here such sandpaper A-120, and it has taken for the experiment. But I think that it is possible and a little bigger, the better.
Nazhdachku attached with screws on the wooden bar that she had not rolled on the sides during sharpening. I chose the most blunt of drills to 8 mm. Before starting the experiment tried to drill them to the board. Really do not drill, but a lot of smoke as from the engine))
The process of sharpening ...
He clamped in the drill chuck and screwdriver included reverse (reverse) therein. Then begin to drill into the back of the sandpaper until it hole. So consistently and do a number of holes, one by one. Thus the need to drill holes 20 - 30. After all these manipulations should be sharpened drill.
Turn the screwdriver to reverse and try again to drill the same board, which was trying to drill before sharpening.
As seen in the photos, the chips are large, decent quality holes, drill drill quite well. Screwing on the speed is not great, if the drill to insert a normal vysokooborotisty drill, the drill will be even better.
On specially adapted quality sharpening would certainly better, but they are not always at hand when needed. Therefore, this method of sharpening drills not be discounted. At the right moment, when there is no equipment, you can always sharpen the drill bit in the "field".