Workholding on The Lathe

Collets

Small workholding devices that locate the work very accurately repeatedly. They can only hold round, hex, and square stock.

Spindle

The part of the lathe that rotates the workholding device. The workholding device is mounted via a threaded spindle type, cam lock type, or long taper type.

Jacob's chuck

This chuck can be used on a lathe to hold extremely small diameter workpieces. It can also be mounted in the tailstock for drilling operations.

A ____ chuck can hold irregular shape work as each jaw has individual movement.

4-jaw independent

Approximate alignment of lathe centers can be determined by checking ____.

Witness lines at the base of the tailstock, centers visually by bringing them together, and diameters on a sample turned section.

The jaws on a 4-jaw independent chuck ____ to hold larger diameter work.

can be reversed.

The tailstock ____.

can support the workpiece with a center or have a hole-making tool mounted into it

The jaws on a universal chuck

close at the same time

The swing of a lathe indicated the largest ____.

diameter work that can be turned over the ways

lathe dog

drives the workpiece when turning between centers

The longest piece of work that can be turned between centers is equal to the length of the bed minus the space taken up by the ____.

headstock and tailstock.

The lathe operates on the principle ____.

of the work revolving against the controllable cutting tool.

The spindle on a lathe is hollow and tapered internally to ____.

permit long stock to be turned without dangerous overhang, allow the use of a knockout bar, and receive tools and attachments with taper shanks.

Lathe size is determined by the ____.

swing and length of the bed.

Round and hexagonal stock will center automatically in a 3-jaw universal chuck because ____.

the jaws move simultaneously.

Turning between centers

the workpiece has center holes drilled on either end and is supported at the headstock and tailstock.

face plate

workpieces can be clamped directly to this device so that irregular shaped workpieces can be machined.