Section 6, Unit 1: Introduction to the Vertical Milling Machine

What measurement does each line represent on the graduated dials of the crank handles?

0.001"

Why is an endmill better suited for cutting grooves than other cutters?

Because an endmill can cut steel with either the bottom or side edges.

What is the common name used to describe most vertical ram and turret milling machines?

Bridgeport

Name three common operations, other than machining a rectangular shape, which can be done using a vertical milling machine.

Cutting slots and groves, and for various drilling operations.

Define the term DRO and explain how it is used.

Digital Read-out: tells the location of the machine table

Name the two cutting tools that are most often used for rapid material removal on the milling machine.

Face mill, Turbo mill

True or False: A milling machine with a step pulley drive must be running in order to change the spindle R.P.M.

False

True or False: An accurate way to measure a titled head on a vertical machine is by using a protractor.

False

True or False: Power quill feed is adjusted from a range of 0.0015" to 0.006".

False

True or False: The table can be moved up or down, manually or by power.

False

Machinists' maintenance responsibilities should include lubricating the vertical milling machine using what type of system? How frequently should this be done?

One-shot, and should be done once every couple of days

The standard taper for a vertical mill spindle is an _____.

R8

Name the part of the milling machine that can be moved up and down in order to drill holes conveniently.

The quill

What part of the vertical mill is used to control quill feed depth?

The quill stop

Describe two methods for holding a work piece on a milling machine.

The use of clamps or vises.

Explain the function of a drawbar.

To secure the cutter or accessory to the spindle

True or False: Angles can be cut on a vertical milling machine by tilting the head.

True

Explain the difference between a variable-speed head and step-pulley head.

Variable-speed head must have the machine running to change the speed, and a step-pulley must be off and manually changed.

Explain the basic difference between a horizontal milling machine and a vertical milling machine.

Vertical milling machine has a vertically oriented spindle.

Side to Side = __ axis

X

Front to Back = __ axis

Y

Up and Down = __ axis

Z

Name the adapter used to hold a straight-shank cutter in an R8 machine spindle.

a collet

A _________ locks the elevating crank in place after positioning the knee.

clamping lever

What is the normal direction of rotation for nearly all cutters used in a vertical milling machine?

clockwise

The ______ passes through the spindle and is used to secure toolholding devices into the machine spindle.

draw bar

The Y-axis moves ______ ___ ______ from the operator.

front and back

The X-axis moves to the ______ ___ ______ from the operator.

left and right

Name the milling accessory used to block a work piece up so that it clears the top or the vise jaws.

parallels

The _______ can be used to quickly stop spindle rotation or to lock the spindle to prevent rotation.

spindle brake

Identify the cutting tools that would usually be used to cut slots and grooves.

the endmill

Describe three other adjustments that can be made to the vertical milling machine, other than moving the table or the quill:

tilting the head front to back, moving the ram forward to backwards, and parallels