Grizzly Gear-Head G9036 - Manual (Page 40)

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Model g9036 Mfg. 7/08+
threading controls
the purpose of this section is to orient you with
the controls used with threading and how to use
the threading dial on this machine.
feed direction lever
When the lathe is setup as shown on the thread-
ing charts, the leadscrew is engaged with the
gears in the headstock and will automatically turn
when engaged by the feed direction lever. the
leadscrew will not turn when the feed direction
lever is in the neutral position.
do not engage the half nut when the spin-
dle is operating over 200 rpm. disregarding
this warning may cause damage to the
leadscrew and bearings.
figure 60. Feed direction controls for threading.
Feed direction
lever
REV
Neutral
FWD
FWD = Feeds
Toward
Spindle
REV = Feeds
Away
from Spindle
figure 61. Feed change lever controls.
Feed Change
lever
Cross Slide
Neutral
Carriage
feed change lever
the feed change lever must be in the neutral posi-
tion for threading operations or the half nut will not
be able to engage with the leadscrew.
half nut lever
the half nut lever engages the carriage with the
leadscrew. typically, the longitudinal handwheel
must be moved slightly to help the half nut engage
on the leadscrew (
figure 62).
figure 62. half nut lever.
half nut lever
thread dial & chart
the numbers on the thread dial are used with
the thread dial chart to show when to engage/
disengage the half nut during sAe threading
operations. the thread dial must be engaged
with the leadscrew to work. to engage the thread
dial, loosen the mounting cap screw, pivot it into
the leadscrew so the gear teeth mesh with the
leadscrew, then tighten the cap screw.
figure 63. thread dial chart and thread dial.
thread dial Chart
thread dial