326 Flashcards
A universal horizontal milling machine differs from a plain horizontal milling machine in that it has
A table swivel
The spindle of a horizontal milling machine is on the
Column
On a horizontal milling machine, the table and saddle are supported by the
Knee
A vertical milling attachment is bolted directly to the milling machine’s
Column
The purpose of a vertical milling attachment is to enable you to mount cutters
In a vertical position
A milling machine’s spindle speed is always expressed in
Rpm
Cutter speed is the rate at which a particular tooth
Passes over the workpiece surface
In order to compute spindle speed, you must have the
All of the above
Round shafts to be milled are usually mounted in a(n)
V block
The graduations on the swivel base of a milling machine vise allow you to
Accurately align the workpiece at any angle
A slab milling cutter is designed to make ______ cuts
Heavy
A right-hand helix means that the
Cuter teeth spiral to the right
A left-hand cut means that the
Feed is from left to right
A Style B arbor has a
Bearing sleeve
A Style B arbor is held in the spindle with a
Drawbar
You should never tighten the arbor nut unless the arbor support is in position because
The arbor can be sprung
According to the formula rpm = sfpm x 4, what would be Dthe spindle speed in rpm if the cutter speed is 70 sfpm and the cutter diameter is 3 in.?
93.33 rpm
Which of the following is NOT a factor in making a rough cut efficiently?
Length of workpiece
If you stop the automatic feed before a cut is finished, always
Stop the cutter rotation
In order to increase surface quality on a finish slab milling cut, lower the feed rate and
Maintain the spindle speed
The first machining step in milling a T-slot is to mill
A slot or groove in the workpiece
In a horizontal setup, what kind of cutter is used to mill the vertical slot?
Side mill
To align the cutter exactly over the top of the intended slot, you must subtract half the cutter width from the
Distance between the slot’s centerline and the workpiece edge
You can fit a T-slot cutter into the horizontal spindle by using a(n)
Adapter
When you are completing a T-slot with the T-slot cutter held in the horizontal spindle, you must
Set the workpiece on its side
To bevel the edge of a workpiece in a horizontal setup, what kind of cutter is used?
Single-angle mill
What kind of cutter is use to mill a slot in a vertical setup?
End mill
When milling a T-slot with a vertical setup as compared with a horizontal setup, you should use
the same T-slot cutter
To angle mill a workpiece in a vertical setup, what kind of cutter would you use?
End mill
The difference between milling a T-slot and milling a dovetail is the difference between the
Cutter shapes
In straddle milling, the distance between the cuts is controlled by the
Spacers between the cutters
In straddle milling, there must be adequate clearance between the workpiece and the
Spacers
The greatest advantage in a straddle milling is that you
Save time
In straddle milling, in order to balance the thrust load on the arbor, the half side milling cutters should have
Opposite helixes
The cutter used to mill an angled step must be wide enough to
Cut the wide end of the step
Which of the following is the most precise method of finding out how wide the end of an angled step measures?
Trigonometry
When you select a cutter for an angled step, you should always select the smallest cutter that will cut the wide end of the step because it
Is less expensive
When milling a step on a workpiece that is mounted at an angle, you must advance the crossfeed an amount that is _____ the desired width of the step (measured on the workpiece).
Less than
What kind of an arbor is used for shell end mill?
Style C
Why should a face mill be wider than the area to be cut?
To avoid surface lines
If you cut a keyseat for square key using an arbor-mounted side milling cutter, you will produce
Feathered ends on the keyseat
Woodruff keyseats and keys are
Standardized
The last two digits on a Woodruff number show the cutter diameter in
Eighths of an inch
What would you use to make a plunge cut?
Two-fluted end mill
A plunge cut allows you to use the cutter in the same way you would use a
Drill bit
The best way to mill squares on round work without using a dividing head is to use _____ milling
Straddle
To find out the largest square that can be cut from a rounded shaft, multiply the diameter by
0.707
If the space between two straddle cutters is slightly too narrow, you can increase it by installing
Shims
The procedures for milling a tang are basically the same as the procedures for milling a
Square
A single flat surface on a round shaft is usually machined with a
Plain milling cutter
