Chapter 14 - Lathe Fill Ins & Short Answer

Why is knurling done?

It is used to provide a gripping surface, change the appearance of the work, or increase the work's diameter.

A(n) ____ type chuck is normally fitted in the tailstock for drilling.

Jacobs

What is the first step that should be performed before using a lathe?

The machine should be inspected for safe and proper operation.

What do long stringy chips indicate?

The tool is not properly sharpened.

Cutting speed and feed govern what conditions?

They determine the length of time required to machine a job and the quality of the surface finish.

A__ chuck can hold irregular shape work as each jaw has individual movement

4-jaw independent

What cutting speed is recommended when reaming on the lathe?

About two-thirds the speed used for a similar size drill.

What is a mandrel?

An accurately made cylindrical section of hardened steel that has been ground with a slight taper.

When parting material, how should the work be mounted in a chuck?

As close to the chuck as possible.

____ indicates the distance the work moves past the cutting tool per minute.

Cutting speed

____ is the distance the cutter moves longitudinally along the ways during a single revolution of the work.

Feed

How is a steady rest used?

It is bolted directly to the lathe ways and provides additional support for long, thin work pieces.

____ cuts are made to reduce work diameter to approximate size.

Roughing

What is the most accurate method for centering round stock in a 4-jaw chuck?

Using a dial indicator.

The ____ contains the drive mechanism to move the carriage along the ways using hand or power feed.

apron

Cutting speeds can be increased 300% to 400% by using ____________________ cutting tools.

carbide

The ____ controls and supports the cutting tool.

carriage

The ____ permits traverse tool movement.

cross-slide

To get the best cutting performance, a cutter bit must have a keen, properly shaped ____.

cutting edge

The ____ of cut refers to the distance the cutter is fed into the work.

depth

The swing of a lathe indicates the largest___

diameter work that can be turned over the ways

Slower speeds with greater power are obtained on some lathes by____

engaging back gear

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

headstock and tailstock

In most lathe operations, you will be using a single-point cutting tool made of ____

high-speed steel (HSS)

A common mistake when using a lathe is to remove too ____________________ (much/little) material at too slow a speed.

little

The lathe operates on the principle ____

of the work revolving against the controllable cutting tool.

The spindle speed when performing a parting operation is about ____ the speed used for conventional turning.

one-third

Angular cuts can be made using the compound ____.

rest

The chief function of any lathe, no matter how complex, is to____

rotate the work against a controllable cutting tool

The ____ is fitted to the carriage and slides along the ways.

saddle

A(n) ____ on a workpiece is the point where the diameters change.

shoulder

Lathe size is determined by the___

swing and bed length

Round and hexagonal stock will center automatically in a 3-jaw universal chuck because____

the jaws move simultaneously