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G9729 Combination Lathe/Mill
Figure 31. Setting the brass finger with an
indicator.
4. Lubricate
the brass finger surfaces with oil
prior to seating them on the workpiece and
occasionally during use.
5. Adjust
the brass fingers until they lightly
touch the workpiece. Note—To minimize
deflection of the part during set up, use the
method shown in (Figure 31). The indicator
is
set opposite to one of the brass fingers
and the brass finger is adjusted until the
needle on the dial moves, then it is backed
off to the original setting. Each brass finger
is adjusted this way.
1. Attach the follow rest to the leading edge of
the carriage.
2. Loosen the knurled thumb screws for each
brass
finger and turn the adjusting knobs
clockwise until they stop.
3. Secure
the workpiece between centers or
into a 3- or 4-jaw chuck with a center mount-
ed
in the tailstock.
The follow
rest is used on long narrow stock to
help keep deflection to a minimum. In normal use,
the cutter applies some pressure to the part. In
the case of slender parts (even those supported
by a center mounted in the tailstock) there is a
tendency for the part to deflect away from the
cutter. The follow rest keep this from happening
because the brass fingers support the workpiece
near the point of contact with the cutter. Figure
30 shows an example of follow rest use.
Follow Rest
Figure 30. Follow rest set-up.
NOTICE
The workpiece must be supported with a
center mounted in the tailstock when using
the follow rest! Damage to the tool
post, fol-
low rest, and workpiece may occur if this
notice
is ignored.