LATHE OPERATIONS - OD1645 - LESSON 1/TASK 2
(3) The workpiece is indexed by moving the crank from one hole in the
index plate to another. An index finger (figure 37 on the previous page)
can be set to indicate a certain number of holes thereby making the counting
of individual holes unnecessary.
(4) To determine the number of holes and the proper ring of holes for any
specific division of the workpiece refer to the appropriate Technical
Manual.
i.
Milling Operation.
(1) Plain milling, angular milling, face milling, form milling, keyway
milling, spline milling, gear cutting, and drilling and boring operations
can be successfully performed on the lathe by using the milling and grinding
lathe attachment.
(2) The basic difference between milling on a horizontal milling machine
and milling with the milling and grinding lathe attachment is that with the
milling machine the worktable reciprocates beneath a milling cutter; with
the attachment, the milling head feeds along the stationary workpiece.
(3) If a coolant attachment is available, flood the milling cutter and
workpiece with an appropriate cutting oil. If a coolant attachment is not
available, apply cutting oil generously from a hand oiler during the
operation.
j.
Lubrication and Adjustments.
(1) Lubrication.
(a) General. The internal mechanism of the Basic Unit is enclosed in an
oil-tight housing, which contains lubricating oil carefully selected for the
requirements of the high performance of the Basic Unit.
(b) After the first three or four weeks of use, the
oil should be
drained out, the oil reservoir half filled with kerosene, and
the basic unit
operated without a load for about five minutes. The kerosene
should then be
removed and clean oil provided. The oil level should be up
to the top of
the worm, with the basic unit in a vertical position.
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