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
Candle-impromptu
It took a long warm-up fine detail, but what? Matches? Do not impossible to satiate, and uncomfortable, and the candle was not at hand. Rescued, as always in such cases, the savvy....
ISOTTA-FRASCHINI TIPO-8A
World renowned Italian firm Isotta-Fraschini, founded and 1900 H Isotta and the brothers Fraschini, initially engaged in sale of cars. However, after a few years it organized the...
