Grizzly G0509 - Manual (Page 33)

G0509 & G0509G 16" x 40" Lathe
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the half-nut lever ( figure 28) clamps and releases
the half-nut, which clamps around the leadscrew.
the lever is only engaged while cutting threads
and is not designed for general power feeding
operations. For general purpose feeding, use the
feed lever (
figure 28). this lathe uses inch lead
screws, and the thread dial chart shown in figure
29 is only used for inch threading. For all other
threading operations, the half nut lever must stay
engaged until the threads are complete.
note: If the apron feed lever (Figure 28), is
engaged, the halfnut lever is blocked from use;
and when the half-nut lever is engaged, the apron
feed lever is blocked from use. If both levers are
engaged at the same time, apron damage will
occur.
When the thumb knob ( figure 28) is loosened,
the thread dial housing pivots so its gear can
be engaged or disengaged from the lead screw.
When engaged, the dial turns with the lead screw
and spindle.
note: Always loosen the carriage lock (Figure
28) when threading or using the apron power
feed. The carriage lock is used only to increase
carriage stability during facing operations.
half-nut lever and
thread dial
figure 29. threading dial chart.
this column indicates
when you can use the
thread dial based on
which thread tpi is being
cut.
this column indicates
which position on the
thread dial you must
reengage the halfnut.
figure 28. threading dial and half-nut lever.
half-nut lever
dial
thumb Knob
threading
dial Chart
Carriage lock
Apron
Feed lever