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Adjusting Half Nut
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 Ea
Open-End Wrench 8mm.................................... 1
To adjust half nut:
1.
DISCONNECT MACHINE FROM POWER!
2.
Open half nut and remove thread dial (see
Figure 79 on Page 53).
3.
Loosen hex nuts on set screws shown in
Figure 128.
Set Screws
w/Hex Nuts
Figure 128. Location of half nut gib set screws.
4.
Tighten each set screw approximately
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. 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.
6.
Repeat Steps 3–5, if necessary, until you
are satisfied with half nut adjustment, then
re-install thread dial.
Model G0782 (Mfd. Since 10/15)
This lathe is equipped with a feed rod clutch,
shown in Figure 129, which connects the feed
drive hub with the feed rod through a set of spring-
loaded internal steel balls. This clutch helps pro-
tect the apron feed system from overload. The
feed rod clutch comes set from the factory, and
Qty
unless there is a problem, it needs no adjustment.
Half Nut
The clutch may slip if the path for the carriage
or the cross feed is obstructed during turning
or facing operations, the tool bit crashes into
a workpiece shoulder, the carriage lock is left
applied when the feed selection lever is engaged,
or if too deep of a cut is taken, causing a sudden
binding of the tool and workpiece.
Note: The clutch is not a foolproof way of protect-
ing your lathe from damage if an operational mis-
take is made, a chuck-carriage crash occurs, or
general machine overloading occur on a regular
⁄
turn,
1
8
basis.
Never completely tighten feed clutch set
screws past normal setting outlined in this
procedure in an attempt to completely elimi-
nate clutch slip. Doing so will void the war-
ranty, and can lead to a non-slipping clutch,
resulting in catastrophic gearbox damage.
Adjusting Feed
Clutch
Feed Clutch
Set Screws
Figure 129. Feed rod clutch.
Feed Rod
-77-
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