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G9729 Combination Lathe/Mill
The Model G9729 comes supplied with a mill-
ing vise that also serves as the compound for
the lathe. The 4-way tool post must be removed
before using the vise.
The milling vise can be aligned to the axis of the
lathe or at any angle desired. Care must be given
to setting the vise if a precision angle is needed.
The following instructions are given to make the
jaws parallel to the travel of the cross slide.
To make the jaws parallel to the cross slide
travel:
1. Loosen
and remove the lock handle and
slide the tool post off of the compound/vise.
2.
Loosen the swivel bolts on the compound/
vise so it can swivel, but not too freely.
Slight resistance will help keep the vise from
changing positions unexpectedly, and keep
grit from getting between the two surfaces.
Pivot the compound/vise so the jaws of
the vise are roughly aligned with the cross
slide.
3. Place
a dial indicator mounted to a mag-
netic base on the lathe bed using a parallel
clamped in the vise jaws (
Figure 59)
.
4.
Move the cross slide with the handwheel
and watch the dial. Note the direction the
needle is moving on the dial and by how
much.
Figure 59. Using a parallel in the vise jaws.
Machine Vise
Never use a vise for
milling unless it is rated
for milling machines.
Drill press or bench
vises are not designed
for the rigors of machin-
ing.
Vise failure during
a milling operation may
lead to serious personal
injury.
5. When the vise has moved so the indicator tip
is at the other end of the parallel, pivot the
vise one half the amount of motion detected
in Step 4.
6.
Move the vise to the starting position and
note the difference. Again, pivot the vise one
half the difference.
7.
Repeat Steps 4–6 until the dial remains sta-
tionary when the vise is moved.
8. Tighten
the pivot bolts on the base of the
vise and re-indicate to make sure that noth-
ing
has moved.