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G9729 Combination Lathe/Mill
Compound Gib: The gib on the compound
has two set screws to maintain tension on the
slide (see Figure 75). To adjust these to the
proper
tension, loosen the cap screw positioned
between them and turn the hand crank while
adjusting each screw. Tighten until extra effort
is required to move the slide then back off the
set screw a little. When needed, the slide can be
locked in place using the cap screw.
Figure 75. Gib adjustment set screws.
Apron Gib: There are 2 set screws that tension
the saddle gib (see Figure 76). Before making
adjustments
to the saddle gib, ensure that the
front lock lever is loose by turning it counterclock-
wise.
It is important that the set screws are tight-
ened
evenly. A slight drag should be detected
while turning the hand crank on the apron.
Figure 76. Apron gib set screws.
NOTICE
When adjusting gibs, keep in mind that
the goal of gib adjustment is to remove
unnecessary movement from the slides
movement without causing them to bind.
Loose gibs may cause poor finishes on the
workpiece and undue wear on the slide, nut
and lead screw. Over tightening will make
turning the handwheel difficult.