Thread cutting (Focus 2)

Very often during the repair process there is a need to restore damaged threads or cut new ones.

Threads are cut quite easily in light alloy metals, since their hardness is not high, unlike steel. If it is impossible to cut a thread of the appropriate size, cut a larger thread.

Restoring a crushed, damaged thread or cutting a new one takes place in three stages, the thread is cut sequentially with three taps: first with a tap with the first number (it has one annular groove on the shank), then with a tap with the second number (with two annular grooves on the shank) and, finally, with a tap with the third number (with three annular grooves or without grooves). Before screwing in, the taps must be lubricated with oil.

To prevent the tap from breaking when cutting threads, screw it in periodically and turn it back to clear away any chips that form.