Tc 9-524 fundamentals of machine tools

MILLING ON THE LATHE
Milling operations may be performed on the lathe by using
the Versa-Mil, which is discussed in Chapter 9, and by using
the lathe milling fixture. The lathe milling fixture
complements the Versa-Mil and adds to the basic capabilities
of the machine shop. If the Versa-Mil is out of action or being
used for another job, many milling operations can still be
accomplished by using the milling fixture (Figure 7-105).
Capabilities, functions, and uses are outlined in the
appropriate operator’s manual, either TM 9-3465-200-10 or
TM 9-3465-201-10.
7-66

---

TC 9-524
USING MICROMETER CARRIAGE STOP
The micrometer carriage stop, shown in Figure 7-28, is used
to accurately position the lathe carriage. Move the carriage so
that the cutting tool is approximately positioned. Clamp the
micrometer carriage stop to the ways of the lathe, with the
spindle in contact with the carriage. The spindle of the
micrometer carriage stop can be extended or retracted by
means of the knurled adjusting collar. The graduations on the
collar, which indicate movement in thousandths of an inch,
make it possible to set the spindle accurately. Next, bring the
carriage in contact with the micrometer spindle again. The
carriage can be accurately positioned within 0.001 inch. This
is very useful when you are facing work to length, machining
shoulders to an exact length, or accurately spacing internal
and external grooves. After making a cut, bring the tool back
to the start of the cut by means of the carriage stop. This
feature is very useful when you must remove a tool, such as
the internal recessing tool, from the hole to take measurements
and then reposition it to take additional cuts. Always bring the
carriage into contact with the stop by hand. Use power feed to
bring the carriage within 1/32 inch of the stop. Move the
carriage by hand the remaining distance.