TPC 325 Flashcards
The jaws of the three-jaw universal chuck operate in?
Unison
The jaws of the four-jaw independent chuck can be?
Reversed, hold irregularly shaped workpieces, adjusted independently
The three-jaw universal chuck is ______ to set up and convenient to use.
Quick
The size of the lathe chuck is designated by its?
Diameter
Before picking up the chuck, place a _____ across the lathe bed and ways
Board
Never use ______ to install a chuck on the spindle threads.
Power of any kind
The two main objectives when installing work in a chuck are to have the work centered properly, and to have the work axis parallel to the?
Centerline of the lathe
How can you install and center irregular or oddly shaped work in a chuck?
Using a dead center
What method is limited to small diameter workpieces with a finished outside diameter?
Using a collet chuck
Where is the mandrel mounted at in a lathe?
Between centers
What does facing the rough workpiece do?
Gives a reference surface as well as square ends for later machining operations
Because cutting is done on the side of the facing tool, what is the most important angle?
The side rake angle
Tool alignment for facing
Set the tools cutting edge on the centerline of the workpiece
Many times a larger area will need to be faced, in such a case how should you feed the tool?
Automatically
What does rough turning the workpiece do?
This operation removes the bulk of material quickly
Rough cutting must leave enough material to?
Make a good finishing cut
A roughing tool will not?
Produce a good finish
The proper use of cutting fluids allows you to?
Increase cutting speed, deeper cuts, saves time
The basic difference between the finishing tool and the rough turning tool is the?
Finishing tools rounded point
What procedure do you use to make a trail finishing cut?
The same procedures that are used for trail rough cuts
Boring does what to a hole?
Makes the hole larger and trues it
A bored hole is always _________ with the circle in which the workpiece or cutting tool is rotating.
Concentric
You must allow for more end clearance when boring because?
It prevents the heel of the tool from rubbing against the workpiece
Always use a boring bar with the?
Largest diameter that is practical for the job
The cutting tool profile determines the type of _______ at the end of the bore.
Corner
When installing the boring bar and bit adjust the compound rest to a?
60 degree offset
When completing the rough boring, if necessary ____________ and clean out the chips
Stop the lathe completely
What increases the inside diameter at one end of an existing hole, forming a recess in the workpiece surface
Counterboring
Counterboring procedures are the same as?
Boring procedures
The counterbore that produces this recess must be ________ with the hole you have just bored
Concentric
What does machining a recess between two sets of internal threads do?
This recess provides chip clearance
The diameter of the hole must equal the minor diameter of?
the finished threads
Internal threading requires tool clearance at?
The bottom of a bored hole
The thread cutting tool must be ground to meet the?
Particular thread form
For right hand thread cutting
Rotate the compound rest 29 degrees to the left of the cross feed centerline
You can bore an internal taper using either of two methods?
The compound rest method
The taper attachment method
When using the compound rest method for boring tapers rotate the compound rest so that?
It is at a 3 degree angle with the centerline of the workpiece
When using the compound rest method for boring tapers set the tool post and tool holder in line with?
The compound rest centerline
What is the most accurate way to machine a taper on a lathe?
Using the taper attachment method
The telescopic taper attachment works the same way as a plain taper attachment except?
That it has a cross-feed screw that telescopes internally to different lengths
A faceplate provides a ___________ that is perpendicular to the lathes spindle axis.
Reference surface
For truing a faceplate, you need to select a?
Broad-nosed finishing tool
For large workpieces that pose mounting problems mount the work on a?
Faceplate and hold it with face-plate jaws
You must clamp this workpiece to the face-plate, the clamps are inserted into the open?
Ends of the faceplate slots
What does a driver do for the cutting tool?
It prevents the workpiece from shifting backwards from the force of the cutting tool against it
Some workpieces cannot be held against the vertical surface of a faceplate. Their shapes prohibit this kind of mounting. In such cases use an?
Angle plate to mount and hold the workpiece
If a job requires an angle plate to be mounted far out toward the edge of the faceplate, what must be used?
A counterweight must be used
V-block angle plates, each half of the clamp has?
A set of V-shaped jaws
A specialized mandrel for machining eccentric circular areas has more than one set of?
Center holes
The workpiece is a cast housing. Because of its size and shape, the workpiece must be mounted on?
The lathe carriage for boring
