Lathe Components and Accessories, Lathe Operations, Milling and Drilling Flashcards
If you want to raise the turrit tool post you must
Shim-it
Why should you use parallels under a workpiece when plunge cutting a through-hole
to prevent cutting into the table
An infeed of .050 on a direct reading cross-slide results in a diameter reduction of?
.050 (same)
An O-ring grove would be cut with?
A form tool
Cutting fluids on a lathe are used mainly for?
decreasing heat and friction
When a vise is being aligned on the table of a knee and column milling machine, how should a magnetic base dial indicator be mounted?
Dial base on column, pointer on the vise’s solid jaw and move the table
The result of knurling is?
A work piece slightly larger in diameter
What type of grinding wheel is best suited for grinding cemented carbide?
Silicon carbide
What are the tapping threads procedures? name them in order sequence?
- Taper
- Plug
- Bottoming
When using a sensitive drill press what should you do as the drill breaks through the workpiece?
Ease up on the pressure
What is the use of the tang on a drill?
is for removal only, not for transmitting torque
Other than it’s magnetic base and its ability to transport around the shop and to the floor. What is another advantage that a magnetic-base drill offers?
The ability to drill, tap, and ream
Why should you clean and lightly oil milling machine tables?
to prevent rusting, which results in loss of accuracy
A centre installed in the tailstock is a?
dead centre
What is the amount of taper on a taper pin?
1/4
Never climb mill on a milling machine unless it has a?
Backlash eliminator
What is the floating reamer holder?
it reduces the effect of reamer misalignment because of its self centering when entering the hole
The compound rest can swivel up to?
360°C
What is one of the best methods use when drilling holes in two mating parts?
is to clamp the two pieces together and drill them as one
A soft material drill have an included angle of?
60° - 90°
The process of enlarging the top of an existing hole to accept the head of a bolt or screw?
Counter boring
To achieve a good knurl you should?
flood the work piece with coolant, because it must fully lubricate
What are the two types of shanks?
- Straight shank
* Taper Shank
The weight of the machine refers to the rigidity of the bed it refers to?
the machine’s ability to resist a deflection on the heavy load, rather than the actual weight in pounds or kilograms
How are metric taper design?
as a ratio
A reamer is used to?
Produce a smooth accurate hole
Taper mandrels or arbors range from?
.006 to .008 taper per foot
Before changing the back gear on a lathe you must?
lockout the power supply and disconnect the machine
Which type of machine tap pushes the chip out ahead of the tap?
Spiral point (gun)tap
Sensitive drill presses have no?
Power Feed
How are Radial arm drilling machines size?
they are sized by the column diameter and by the greatest distance from the spindle axis to the edge of the column, when the drilling head is extended to the maximum distance along the radial arm
The four styles of milling cutters are?
- Solid high speed steel
- Solid carbide
- Carbide cutting edges brazed onto a solid shank
- Indexable inserts clamped in a holder
What are the main categories of cutting fluids?
- cutting oils
- emulsifiable oils
- chemical cutting fluids
The lip relief/ clearance angle on a drill should be?
8° + 12°
When grinding a work piece between centres you feed?
with the carriage feed
What are the two ways of sizing a sensitive or upright drill press?
- by the distance from the column to the tool
* by the larges diameter of workpiece that can be centered under the tool
The hand drill is quicker and more versatile than any drill press for?
Drilling small non-vertical holes
What is the main purpose of stop blocks
to keep the workpiece from shifting under heavy cutting pressures
Most lapping is now done on?
flat surfaces
The manual oil pump on the carriage pumps oil to?
the ways
The included point angle of a countersunk hole for most flathead screws is?
82°
Cutting speed refers to?
Peripheral speed the cutting tool moves
When grinding HSS, you must remember to?
Quench
A pilot counter bore is usually how much of an inch smaller than the hole diameter?
.002 and .005 of an inch smaller than the hole
The pitch of a thread cut on a lathe is controlled by the?
lead screw
The three methods used for hole location transfers are the?
- Twist drill method
- Transfer punch method
- Transfer screw method
A hard materials drill have included angles of?
150°
The finish on a thread can be enhanced by using?
cutting oil
A face mill produces a surface that is?
Flat and perpendicular to the axis of the spindle
How can you convert a horizontal milling machine into a vertical milling machine?
By using vertical milling attachments
List the different standards used to size a drill or twist drills?
- Fractional size
- Number size
- Letter size
- Metric size
What must you ensure when attaching a collet in to the nut?
Make sure it snaps on
A followers rest has how many jaws?
2 adjustable jaws
The size of the lathe is determine by the?
maximum distance between centres and the amount of swing
Once you have set a taper attachment to the desired angle, what important step must you follow?
take a trial cut and measure the taper
Explain the two main advantages of a four jaw chuck
- is more accurate than the 3 jaw chuck
* it can hold square or oddly shape work pieces
To remove a taped shank twist drill from the drill press spindle, use a?
Drill drift
What is the abbreviations used to express the feed rate on a drill press?
IPR
Electric hand drills are limited by?
The Amount of Feed Pressure (and RPM) that can apply to large-diameter drills
What holds a milling machine arbor securely in the spindle?
Draw bolt
Turning is usually done with a
right hand tool
The process of squaring the surface of a work piece to a drilled hole?
Spotfacing
The length of a keyseat it doesn’t include?
Any runout or radius left by the cutter
The factor that determines RPM and feed rates, are?
- work piece materials
- cutting tool materials
- operation being perform
Cutting speed refers to?
Peripheral Speed
What are the different end-mill shank?
- Straight
- Weldon
- Threaded
- Double end
The tail stock has two piece adjustable casting to permit?
taper turning
Small drills require a higher ______ than larger ones
RPM and less feed per revolution than larger drills
The most common lathe operations is?
turning
What is a shim used for, on a milling machine?
to fill the gap under the workpiece
The main parts on an engine lathe
- the bed
- headstock
- the quick change gearbox
- the carriage
- the tailstock
- the ways
- back gears
How do you size knee and column type milling machines?
They are sized according to the range of movement possible and horse power rating of the main motor
Metric cutting speed formula
RPM=(CS(m)x320)÷Diameter of Cutter
The headstock of a lathe is located on the?
left and contains spindle
Most screw heads have an included angle of?
82°
A lathe dog is used to?
transmit drive power to a mandrel or work piece held between centres
The thread chasing dial when threading even numbers, at what graduation would you engage the split nut?
any graduation
A general-purpose drill for drilling metals has an included point angle of?
118°
The thread chasing dial is used to?
time engagement of the split nut when cutting a thread
Milling machine spindles have a standard steep machine taper of?
3-1/2 inch taper per ft (TPF)
Imperial cutting speed formula
RPM=(CSx4)÷Diameter of Cutter
The chuck best suited for holding odd shape pieces is the?
four jaw chuck
Cutting a taper with the compound rest has what major disadvantage?
there is no power feed
Which variable is the most important when determining spindle speed?
Diameter of the Drill
During what milling operation would you use a backlash eliminator?
For Climb milling
The six basic components to a knee and column milling machines are?
- base
- column
- overarm
- saddle
- knee
- table
What are the six approaches when drilling a hole or drill a hole?
- Drilling work held in a vise
- Drilling to an accurate layout
- Drilling large holes
- Drilling holes in matting parts
- Drilling round work
- Deep hole drilling
The quick change gearbox on the engine lathe is used to?
feed and speeds
What are the types of milling machines arbors?
- A arbors
- B arbors
- C arbors
What are the two main features on a plain horizontal?
- the main spindle is horizontal
* the table does not swivel; rather , it moves at only right angles to the spindle
A revolving centre is installed in the?
tailstock
The thread-chasing dial?
tells you when to engage the split nut
What is boring?
enlarging an existing hole, but can not start a new one
A centre installed in the headstock is a?
live centre
A drill press spindle has a #2 morse taper. A twist drill with a #3 morse taper shank must be mounted in the spindle. How do you secure the drill in the spindle?
use a drill socket
Name the drill presses commonly found millwright shops
- sensitive drill press
- upright drill presses
- hand drills
- magnetic base drills
- radial drilling machine
To cut an angle of 60° on a work piece using a lathe you must set the tool post at what degree?
30° angles - because cuts are made at included angles
Any mechanical surface on a drill press that could rust must be?
Kept clean and oiled
Lathe are considered to be more dangerous than other machine because?
they have not evolved with safety features like most machines
The boring operation on a lathe is?
increasing the diameter of a hole in a work piece
When grinding on a lathe you should?
cover the ways with ply-wood
The apron hand wheel moves the carriage by means of?
rack and pinion
How does the feed in speed of a reamer is compare to a drill?
RPM is lower and feed is faster
The jacob taper per foot ranges from what sizes?
.591 to .979 inch taper per foot
The table on universal milling machines can swivel how many degrees?
up to 45° in either direction
Why should you store end mills separate from one another?
to protect their cutting edges from chip and wear
When a single point tool is used to machine on an internal feature is called the?
Boring
The depth of each cut varies with?
- the pitch of the thread
- the material being cut
- the type of cutting tool
- the rigidity of the set-up
The type of machine tool spindles include?
- lathe headstock spindles
- lathe tailstock spindles
- milling machine spindle
- drilling machine spindle
The four main parts of the carriage are?
- apron
- cross-slide
- saddle
- compound rest
When using power feed the workpiece must be?
clamped to the table
What is the maximum depth of cut for an end-mill?
1/2 the cutters diameter
A twist drill is divided into three parts which are?
- The point
- The body
- The shank
The thread chasing dial when threading odd numbers, at which graduation would you engage the split nut?
any main graduation
What is the negative result of using a tool post grinder on a lathe?
the dust destroys the ways
What type of taper is used in the tail stock?
a morse taper (self holding)
When filing a work piece in a lathe
hold the file in your left hand
What are the four main types of knee and column milling machine?
- Plain horizontal
- Universal horizontal
- Standard vertical
- Ram-type vertical
When finishing a work piece using an emery cloth, how should you hold it in position?
the end held in your left hand passes under the work piece and the end coming over the top is held in your right hand
The tailstock is locked in position on the ways of the lathe with the?
tailstock clamp
How is feed on a milling machine specified?
Inches Per Minute (IPM)
What is affected when drill bit tapers get damage?
the alignment and locking capabilities
