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
DRY CLEANER
The kitchen electric air cleaner, installed in a visor over the stove top has two output Windows: one goes cleaned warm air. If you install them on a mesh tray, it will be possible to...
SNOW “PLANE”
From a young age was fond of technology and like most boys, dreamed of being a pilot. But, like many, for a number of reasons they did not, and acquired the specialty of a mechanic....
