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the saddle gib is located on the bottom of the
back edge of the slide (figure 126). this gib is
designed differently than the cross or compound
slide gibs. instead of being a wedge-shaped plate,
it is a flat bar. the gib pressure is applied by four
set screws. hex nuts secure these set screws in
place, so they will not loosen during operation.
set screws
figure 126. saddle gib components.
Tools Needed
Wrench 10mm ................................................... 1
hex 3mm ........................................................... 1
hex 6mm ........................................................... 1
To adjust the saddle slide gib:
1.
disConnECt LAthE FroM poWEr!
2.
Clean and lubricate the lathe bedways (refer
to page 64).
3.
if the carriage lock (figure 87) is tight, loosen
it two turns.
4.
Loosen the jam nuts on the four set screws
shown in figure 126, and adjust the set
screws the same amount as follows:
—to tighten the carriage gib, tighten the set
screws.
—to loosen the gib, loosen the set screws.
5.
Move the carriage back and forth and repeat
adjustments as necessary until the gib pres-
sure is acceptable.
6.
hold the set screws in place and tighten the
jam nuts.
-74-
Half Nut Adjustment
the half-nut mechanism can be adjusted if it
becomes loose from wear. the half nut is mount-
ed in ways with a gib exerting pressure between
components to reduce sloppy movement. the
half-nut gib is a flat bar-type gib, similar to the
saddle gib, and is tensioned with three set screws.
Tools Needed
hex Wrenches 2.5, 6mm .......................... 1 Each
Wrench 8mm ..................................................... 1
gib
To adjust the half nut:
1.
disConnECt LAthE FroM poWEr!
2.
disengage the half nut and remove the
thread dial.
Qty
3.
Loosen the hex nuts on the set screws shown
in figure 127.
set
screws
figure 127. half nut gib set screws.
4.
tighten each set screw approximately
turn, then retighten the hex nuts without mov-
ing the set screws.
5.
Move the carriage handwheel until the half
nut can fully close, then open/close the half
nut several times and notice how it feels. the
half nut is correctly adjusted when you feel
a slight drag while opening and closing it. it
should not feel too stiff or too loose.
6.
repeat Steps 3–5, if necessary, until you are
satisfied with the half nut adjustment, then re-
install the thread dial.
half nut
Model G0750G (Mfg. Since 11/12)
Qty
⁄
of a
1
8
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