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
