chapter 14 the lathe

spindle

Various work-holding attachments can be fitted to the ______

RPM= CS*4/D

cutting speed formula for inches

sequence

when lubricating a lathe you should use the type and grade of lubrication and the specific lubricating ________ specified by the manufacturer

the diameters of the part will be eccentric

how will the work be affected if the headstock center does not run true when working between center?

bent-tail safety

The ________ lathe dog has a recessed setscrew

jacobs

a _____ chuck is normally fitted in the tailstock but can also be used to hold small-diameter work for turing if fitted into the headstock

threaded spindle nose

a ______ is seldom used on modern lathes

3-jaw universal

a _______ chuck automatically centers work. all of the jaws move simultaneously

round-nose

a ________ tool is ground flat on the face and designed for lighter turning

combination drill

a _________ and countersink are usually used to drill center holes

90 degrees to the work surface

at what angle is the cutoff blade set when parting on a lathe?

at 30 degrees from a right angle

at what angle should you set the compound rest when rough turning between centers?

drill center holes

before work can be mounted between centers a ________ must be crilled at each end of stock

RPM=CS*1000/D*3

cutting speed formula for millimeters

carbide cutting tools

cutting speeds can be increases by 300 % or 400% by using this

in either direction

facing cuts can be made _______

3-jaw universal, 4- jaw independent, jacob, collet

four types of lathe chucks

square, angular, fillited, undercut

four types of shoulders

driving the lathe, holding and rotating the work, holding, moving and guiding the cutting tool

into what three functional categories do the various parts of the lathe fall?

swing

lathe size is determined by _______ and the length of the bed

HSS

many lathe operations will us a single point cutting tool made of what?

collet, 3-jaw universal, 4-jaw independent, jacobs chuck

most work can be machined while supported by one of four methods

parting

never attempt to perform a _______ operation on work being turned between centers

maintain precise alignment of the headstock and tailstock and guide the travel of the carriage

purpose of ways on the lathe bed

back gear

some lathes come equipped with _______ , allowing for slower speeds with greater power

1/3

spindle speed is about __________ that of convection turning

ways

the V-shaped bearing surface of a lathe that aligns and guides the movable part of the machine is the ______

half-nuts

the _____ is engaged only for thread cutting

clamp-type

the _____ lathe dog is used for turning square or rectangular work

lead screw

the ______ transmits power to the carriage through a gearing and clutch arrangement.

bent-tail standard

the _______ lathe dog has an exposed setscrew

3-jaw universal

the jaws of a _______ chuck cannot be reversed to hold large diameter work

4-jaw independent

the jaws on a _________ chuck can hold irregularly shaped work because each jaw has individual movement

to the left

the shank of the left-hand toolholder points _______

maintain accuracy over long period of hard usage and the ability to center work automatically

what are the chief advantages of a collar chuck?

is equal to the length of the bed minus the distance taken up by the headstock and tailstock

what determines the largest piece that can be turned between centers on a lathe?

the chip/ feed rate is excessive, it shows to much heat at the point of contact with the work and cutting tool

what do blue chips mean?

the feed rate is too fast for the depth of the cut

what do thick and intertwined chips tell you?

if the cutting tool is slightly above the center

what does a rounded nubbin indicate?

index plate

the _______ provides instructions on how to set the lathe shift levers for various thread cutting and feed combination

back gear

the ________ on a lathe system provides slower speeds with greater power

roughing cuts

the deep cuts made to remove a large amount of material from a workpiece are called ________

receive tools and attachments with taper shanks

the spindle on a lathe is hollow and is tapered internally to ________

is used to mount the lathe center

the tailstock _____

reduce chip width and to prevent binding in the grooves

why is the concave rake ground on top of the cutter when used for parting operations?

tailstock center

you should check work frequently when matching between center because as the workpiece heats up it may damage the ________

chipbreakers

________ are used to break the long , continuous chips that are created when machining some metals

machine oil

to prevent rust from forming, a light coating of _____ should be applied to all, machined surfaces

the cutting tool is below center

what does a square-shoulder nubbin indicate?

the distance the work moves past the cutting tool (fpm or mpm)

what is cutting speed

the lathe operates with the rotating of the work against the edge of a cutting tool

what is the basic principle of lathe operation?

dial indicator

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

remove chuck key

what is the most important safety precaution to remember when using a chuck

work should be center drilled and supported with the tailstock center

what should be done to prevent springing when machining long work?

change the chip load and feed rate so that less heat is generated

what should you do if you see blue chips?

the irregular edge produced by grinding will crumble when used

what will occur is tools designed for machining steel are not honed?

paint-brush

when removing chips from a lathe, it is recommended that you use a ________

check centers visually by bring centers together, or check the witness lines on the base of the tailstock for alignment

when the work is turned between centers, a tapered piece will result if the centers are not aligned. what two methods are used to determine approximate alignment?