LATHE OPERATIONS - OD1645 - LESSON 1/TASK 2
(c) After the initial change, the oil should be changed every three to
four months, depending on the amount of use. Cleaning and flushing the oil
is important, since the oil is subject to heat and wear the same as the oil
of an automobile.
(d) To change the oil, remove the cover plate, which is held on the main
casting with eight screws.
(e) For general use, the basic unit should be filled with oil up to the
top of the worm to ensure that the worm and the gear will be lubricated in
all operating positions. In production installations where the main spindle
will remain horizontal, the oil may be reduced to 1 inch in depth, which
will give an even cooler operation on continuous runs.
(f) Ordinary cylinder oils may not provide the film necessary to
properly protect the fine precision finish of the worm and gear. Use ONLY
Gargoyle Oil, Almo #5 or its nearest equivalent available.
In military
installations, the first choice should be oil conforming to specification:
MIL-L-15019A-type #4065. Second, use Federal Specification #VV-L-765 SAE 80
or 90.
(g) A light film of oil should he kept on the posts to preserve their
finish. This will be sufficient lubrication for the post sleeves. The lead
screw and the lead screw collar should be occasionally lubricated with a
good grade of machine oil.
(h) The motor bearings have been packed with high grade ball bearing
grease sufficient for about two years of average operation.
To regrease,
remove the set screws from each hub and insert a good grade of ball bearing
grease. Then replace the set screws.
(2) Adjustments.
(a) Tightening the Belt.
1 The belt tension and the center distance are adjusted by moving
the motor in or out along the motor bracket. Tightening the socket head cap
screws which serve as the motor mount pivot bolts will lock the motor in
position. These should be loosened when adjusting the belt tension and to
provide slack for shifting the belt.
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