Chapter 14 - Lathe

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

4-jaw independent

If a lathe dog binds on the faceplate slot, the piece being turned will ____.

ALL OF THE ABOVE; be pulled off-center, not be concentric with the center hole, and be eccentric with the center hole.

Collets can ____.

ALL OF THE ABOVE; center work automatically, maintain accuracy over long periods of hard usage, be expensive because a different size collet is needed for each different size or stock shape.

The lead screw transmits power from the quick change gear box to the ____.

NONE OF THE ABOVE; headstock, back gears, and tailstock

A ____ is seldom used on modern lathes.

threaded spindle nose.

There are a number of factors that must be considered when determining the correct cutting speed and feed rate, including the ____.

ALL OF THE ABOVE; kind of material being machined, condition of the lathe, and cutting tool material.

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

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

The tailstock ____.

ALL OF THE ABOVE; permits taper turning to be done, is necessary to support long work being turned, and is essential for drilling operations on a lathe.

The finish cut brings the work to ____.

ALL OF THE ABOVE; size using high spindle speed, a sharp cutting tool, and fine feed, the required diameter, and the required surface finish.

Which of the following actions are considered dangerous when operating a lathe?

ALL OF THE ABOVE; using compressed air to clean the machine, measuring with work rotating, and wearing loose clothing and jewelry.

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

ALL OF THE ABOVE; witness lines at the base of the tailstock, centers visually by bringing them together, and diameters on a sample turned section.

Cutter bits are ground to cut ____.

It depends on the tool.

The spindle will have to be ____.

NONE OF THE ABOVE; lubricated each time the machine is used, removed with a knockout bar, and adjusted to be in alignment with the tailstock center when necessary.

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

can be reversed.

When moved, the variable speed control will ____.

change spindle speed

Parting is the operation of ____.

cutting off material after it has been machined.

The swing of a lathe indicated the largest ____.

diameter work that can be turned over the ways

If the live center on a lathe does not run true, the work will have diameters that are ____.

eccentric.

Slower speeds with greater power are obtained on some lathes by ____.

engaging back gear.

If the cutting speed is too slow, ____.

extra time will be needed to complete the job.

The bent-tail standard dog ____.

has the setscrew exposed

A bent-tail safety lathe dog ____.

has the setscrew recessed.

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.

Never attempt to part stock that is held ____.

mounted between centers

Assuming that power is being transmitted through the gearbox, if the quick-change gearbox is changed, the cutting tool will ____.

move faster or slower if the carriage is engaged to the lead screw.

The lathe operates on the principle ____.

of the work revolving against the controllable cutting tool.

The chief function of any lathe, no matter how complex, is to ____.

rotate the work against a controllable cutting tool

When facing stock, a rounded "nubbin" of face material results if the cutting tool is ____.

slightly above center.

When facing stock, a square shoulder "nubbin" of face material results if the cutting tool is ____.

slightly below center.

Lathe size is determined by the ____.

swing and length of the bed.

If the cutting speed is too high, ____.

the cutting tool will dull rapidly.

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

the jaws move simultaneously.

The jaws on a 3-jaw universal chuck ____.

cannot be reversed to hold larger diameter work.