Very often, a broken drill should just throw it away because of the inability to even re-ground it. However, it can be converted into a punch. It is enough to the breaking point to make the angle marked in the figure. For such an operation better suited for the drill of large diameter. This punch will make it easier to obtain holes in concrete. Slightly after each hammer blow, the punch should be slightly rotated around the axis.
L. ANDARALO, M and n s K, Belarus
Recommend to read
SAVES REFRIGERATOR
Anyone who used spokoinym glue, you know that, after mixing with curing agent (with gloves and under the vents: glue is toxic!) after a short time, it thickens and hardens; often, the...
THE GAS TANK OF THE “CROWN”
Do not rush to dispose of the waste battery "Krona"! It will serve more on your model. No, not as a newly charged power source for radio remote controls. Her shell will not hide the...
