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Grizzly g4003g Owner's Manual: Section 4: Operation; Spindle Speeds

Gunsmith's lathe.
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section 4: operation

to reduce the risk of
serious injury when using
this machine, read and
understand this entire
manual before operating.
damage to your eyes and lungs could result
from using this machine without proper pro-
tective gear. always wear safety glasses and
a respirator when operating this machine.
if you have never used this type of machine
or equipment before, We strongly rec-
ommend that you read books, review
industry trade magazines, or get formal
training before beginning any projects.
regardless of the content in this section,
grizzly industrial will not be held liable for
accidents caused by lack of training.
complete the test run & break-in proce-
dure on page 20, then replace the gearbox
oil before using this lathe for any cutting or
threading operations; otherwise, gear box
damage may occur.
Model g4003g (Mfg. since 4/08)

spindle speeds

never move levers while lathe is running,
and never force any lever when shifting.
the spindle speed or rpM is controlled by the
speed control levers (figure 18). use the chart in
figure 19, to find the best spindle speed required
for your task.
figure 18. spindle control levers.
the chart below shows the various combinations
of knob positions for achieving a desired speed.
to select a spindle speed of 600 rpM, move the
alpha lever until the indicator arrow points to c.
Move the numeric lever so it points to 3.
figure 19. speed chart.


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