Change Gears - Grizzly G4000 Owner's Manual

Note: In the next step, the gears must prop-
erly mesh. It may be necessary to rock the
spindle back-and-forth by hand until the
gears mesh. Also, use one hand on the bot-
tom of the lever to apply sideways pressure
when moving it.
2. pull the lever knob out, slide the lever under
the correct hole, raise it up to align the lever
pin with the hole, then release the knob.
Note: Make sure the lever pin is firmly seated
into the hole before continuing the operation.

Change Gears

in addition to setting the feed rate lever, the
change gears shown in figure 48 work with the
feed rate lever to provide the various powered
feed rates for the carriage.
"a"
Change gears
120/127t
gears
"b"
Change
gear
figure 48. Change gears.
When configuring the change gears, follow
these rules to ensure good results:
•
When removing or replacing the change
gears, thoroughly clean the gears, bushings,
and the gear shafts with a stiff brush and min-
eral spirits. When dry apply a thin coat of light
machine oil to the gear teeth, the bushings,
and the gear shafts to prevent corrosion and
ensure smooth movement.
-36-
• Leave 0.002"–0.003" of backlash between
the gears when you mesh them together so
that they do not bind.
• to avoid restricting gear rotation, do not
overly tighten the fasteners that secure them.
this hardware is intended to just keep them
in place.
• Before starting the lathe, rotate the change
gears by hand to make sure they have proper
backlash and rotate freely.
to learn how to configure the change gears, per-
form the following instructions to set up the lathe
for the feed rate of 0.0078 in./rev. (inches of travel
per revolution of the spindle), which is referred
to in the grayed sections of the feed rate chart
in figure 49.
ins
pivot
Arm figure 49. sections of the feed rate chart greyed
Tools Needed
hex Wrench 5mm .............................................. 1
Wrench or socket 10mm ................................... 1
Flat head screwdriver #2 .................................. 1
To configure the change gears for a feed rate
of 0.0078 in./rev.:
1. disConnECt LAthE FroM poWEr!
2. open the change gear cover.
3.
Loosen the cap screw that secures the pivot
arm, then lower the 120/127t gears away
from the "a" gears (see figure 48).
4.
remove the E-clip that secures the "a" gears,
then remove the gears from the shaft (see
figure 50).
Lever 9
40
80
a 28
a
40
120
b 60
127
b
Feed 0.0047 0.0063 0.0078
illustrate the example.
Model G4000 (Mfg. Since 8/09)
5 1 1
28 28 42
60 60 60
0.012
Qty