Restored three dummy bits for the screwdriver 15 min
Even a bit of good steel, sooner or later wear on splines screws and tighten their stops. Then it can be thrown away or to reanimate.
I have 3 found worthless bits Phillips tip, one of which lay 8 years old, the other - 4 years, and the third is quite fresh - last year. And each of them "health" could improve.
How it was
I enjoyed the only homemade elektronazhdakom, I described earlier. But this is not necessarily enough to have on hand, emery wheel, file or a piece of coarse sandpaper. In short, we need some kind of a grinding material or tool.
Take the first cue ball and grind lap lapped screws spout about 2-3 mm - to the point where it ends production.
At first it seems that it is too much, but it's not so much that it becomes apparent after the next operation.
Slowly I grind each end of the crosspiece under the approximately same angle as worn sharpened edge. Here it is necessary not to overdo it and whittle them evenly at the same angle.
After completion of turning Phillips got the cue ball with the tip of a regular shape, visually can not be distinguished from the new. And of course immediately tried to screw screw it, what happened without any misfires.
With two other bits did the same regenerative cycle and here you are, check out the result - and all three live!
Manually grind bits while longer, but the chance to spoil them completely is much smaller. I think without the power it takes to 20 minutes.
Well, as it was, in fact, see in the video.
Evaluate material andsign upCanal.
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