All drilling machines operate on the same basic principle. ... connector, collet and sealing sleeve. The drill head is screwed to the drill tube by means of a four-start square thread. ... George ...

The fascinating process of creating a precise thread using a thread drill on a manual lathe is fully demonstrated. Watch as skilled craftsmanship turns raw material into a finely threaded piece ...

Screw threads are used for a variety of purposes and applications in the machine tool industry. They are used to hold or fasten parts together (screws, bolts and nuts), and to transmit motion (the ...