Table of Contents
Advertisement
6.
Move carriage back and forth and repeat
adjustments as necessary until gib pressure
is acceptable.
7.
Hold set screws in place and tighten hex
nuts.
8.
Re-install backsplash.
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 two set screws.
Tools Needed
Hex Wrenches 4, 5, 13mm ..........................1 Ea.
To adjust half nut:
1.
DISCONNECT MACHINE FROM POWER!
2.
Disengage half nut and remove thread dial.
3.
Loosen hex nuts on set screws shown in
Figure 108.
Thread
Dial
Half Nut Lever
Figure 108. Half-nut gib set screws.
4.
Slide gib plate inward to desired amount.
5.
Tighten each set screw approximately
turn, then re-tighten hex nuts without moving
set screws.
Model G0949G (Mfd. Since 01/22)
Qty
Gib Plate
Set
Screws
⁄
of a
1
8
6.
Move carriage handwheel until half nut can
fully close, then open/close half nut several
times and notice how it feels. Half nut is cor-
rectly adjusted when you feel a slight drag
while opening and closing it. It should not feel
too stiff or too loose.
7.
Repeat Steps 3–5, if necessary, until you
are satisfied with half nut adjustment, then
re-install thread dial.
Leadscrew End-Play
Adjustment
After a period of time, you may find that the
leadscrew develops excessive end play. This
lathe is designed so that end play can be removed
with a simple adjustment.
Tool Needed
Spanner Wrench................................................ 1
To remove leadscrew end play:
1.
DISCONNECT MACHINE FROM POWER!
2.
Loosen outer spanner nut (see Figure 109).
3.
Place spanner wrench on end of leadscrew.
4.
Rotate carriage handwheel to move carriage
toward tailstock, then tighten inner spanner
nut (see Figure 109) until there is 0.001"–
0.002" of end play.
Leadscrew
Figure 109. Leadscrew and spanner nuts.
5.
Tighten outer spanner nut until it is snug
against inner spanner nut to secure setting.
Qty
Inner Spanner Nut
Outer
Spanner
Nut
-71-
Advertisement
Table of Contents
