LATHE OPERATIONS - OD1645 - LESSON 1/TASK 2
to wipe off the arbor with a slightly oiled clean cloth before inserting the
arbor into the spindle.
(2) The arbor is drawn into the spindle taper by a draw bar with a right
hand thread. The draw bar is operated by the small hex head screw located
at the rear of the unit, under the motor mount boss.
The draw bar is
tightened by placing the socket key at the side of the draw bar wheel to
prevent its turning, and then rotating the worm sheave to the rear by hand
until the arbor is firmly seated in the spindle.
(3) To remove the arbor, the draw bar wheel is turned to the left, until
the arbor is freed from the taper.
The arbor may then be turned out by
hand. Use the socket key, turning the worm spindle to the front, reversing
the procedure for tightening or to release the arbor.
f.
Mounting and Removing Cutters from Arbors.
(1) Bore type of cutters such as side milling cutters should be mounted on
the arbor before the arbor is placed in the spindle, and should be removed
only after the arbor has been removed from the spindle.
(2) Particular care should be taken to avoid sharp hammering blows on the
arbor or spindle that may be transmitted against the face of the gear teeth
and thereby causing damage to their fine precision finish.
g. Mounting Workpieces for Milling on the Lathe. Workpieces are supported
in the lathe between centers, against a faceplate, or in a chuck fixed to a
headstock spindle.
A lathe dog is used to secure the workpiece to the
driving faceplate if the workpiece is mounted between centers.
If long
workpieces are chuck-mounted, a steady rest or a follower rest is used to
support the free end of the workpiece.
h.
Indexing Workpieces for Milling on the Lathe.
(1) Indexing is the process of controlling the rotational position of a
workpiece which is mounted axially.
Workpieces mounted in the lathe for
milling with the milling and grinding lathe attachment (versa-mil) are
indexed with the indexing head, a part of the attachment.
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