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
TO SWIM AND GO ON THE SPOT
It is known that rowing provides a good physical stress primarily the muscles of the hands and body, and the bike is hip and calf group muscles of the foot. I wanted to make morning...
“SYRINGE”-COULTER
The seeder is equipped with this opener, like a syringe: it can make seeds just under the soil, making a kind of "injection" at a given depth. This is due to the fact that swept the...
