The square threads are usually found on

Q. The square threads are usually found on:

1. Spindles of bench vices
2. Railway carriage couplings
3. Feed mechanism of machine tools
4. Screw cutting lathes

Answer: Feed mechanism of machine tools

• A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force.
• The square thread form is a common screw thread form, used in high load applications such as leadscrews and jackscrews. It gets its name from the square cross-section of the thread. It is the lowest friction and most efficient thread form, but it is difficult to fabricate.

The “feed” is the rate at which the bit passes through the material. The “speed” is the RPMs of the bit. The faster the feed, the higher the speed to get the same amount of chipload.