lead screw

[ leed ]

/ lid /

(on a lathe) a rotating horizontal screw for moving the tool carriage along the work at a constant rate.

Words nearby lead screw

The carriage should not be disengaged from the lead-screw after starting the cut, the tool being returned by reversing the lathe.

Turning and Boring |Franklin D. Jones
As previously explained, lead-screw S is only used for feeding the carriage when cutting threads.

Turning and Boring |Franklin D. Jones
If, on the other hand, no movement takes place, it is an indication that the pitch of the lead-screw is correct.

Measuring Tools |Unknown
This is not the case, however, when the number of threads being cut is not a multiple of the number on the lead-screw.

Turning and Boring |Franklin D. Jones

By referring to the last column, we find that the lead-screw gear should have 84 teeth.

Turning and Boring |Franklin D. Jones

lead screw

/ (liːd) /

a threaded rod that drives the tool carriage in a lathe when screw cutting, etc