MILLING MACHINE OPERATIONS - OD1644 - LESSON 1/TASK 1
FIGURE 6.
INDEXING FIXTURE.
spindle, or may be fitted directly into the taper spindle recess of some
indexing fixtures.
(3)
There are many variations of the indexing fixture.
The name
universal index head is applied to an index head designed to permit power
drive of the spindle so that helixes may be cut on the milling machine.
"Gear cutting attachment" is another name for an indexing fixture; in this
case, one primarily intended for cutting gears on the milling machine.
d.
High-Speed Milling Attachment.
The rate of spindle speed of the
milling machine may be increased from 1 1/2 to 6 times by the use of the
high-speed milling attachment.
This attachment is essential when using
cutters and twist drills which must be driven at a high rate of speed in
order to obtain an efficient surface speed.
The attachment is clamped to
the column of the machine and is driven by a set of gears from the milling
machine spindle.
e.
Vertical Spindle Attachment. This attachment converts the horizontal
spindle of a horizontal milling machine to a vertical spindle.
It is
clamped to the column and driven from the horizontal spindle.
It
incorporates provisions for setting the bead at any angle, from the vertical
to the horizontal, in a plane at right angles to the machine spindle. End
milling and face milling
15
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