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