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The saddle gib is located on the bottom of the
back edge of the slide (see Figure 130). 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 130. Saddle gib components.
Tools Needed
Open-End Wrench 10mm .................................. 1
Hex Wrench 3mm .............................................. 1
Hex Wrench 6mm .............................................. 1
To adjust saddle slide gib:
1.
DISCONNECT MACHINE FROM POWER!
2.
Clean and lubricate lathe bedways (refer to
Page 66).
3.
If carriage lock (see Figure 129) is tight,
loosen it two turns.
4.
Loosen jam nuts on four set screws shown
in Figure 130, and adjust set screws same
amount as follows:
—To tighten carriage gib, tighten set screws.
—To loosen gib, loosen set screws.
5.
Move carriage back and forth and repeat
adjustments as necessary until the gib pres-
sure is acceptable.
6.
Hold set screws in place and tighten jam
nuts.
-78-
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 half nut:
1.
DISCONNECT MACHINE FROM POWER!
2.
Disengage half nut and remove thread dial.
3.
Loosen hex nuts on the set screws shown in
Qty
Figure 131.
Set
Screws
Figure 131. Half-nut gib set screws.
4.
Tighten each set screw approximately
turn, then retighten hex nuts without moving
set screws.
5.
Move carriage handwheel until half nut can
fully close, then open/close 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 half nut adjustment, then
re-install thread dial.
Half Nut
Model G0824 (Mfd. Since 12/16)
Qty
⁄
of a
1
8
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