Gap Removal; Spindle Bearing Preload - Grizzly G9249 Owner's Manual

Gap Removal

the Model g9249 comes equipped with a gap
section below the spindle that can be removed for
turning large diameter parts or when using a large
diameter faceplate.
the gap is installed, then ground, at the factory
during lathe assembly for precise fit and align-
ment. Factors during the remaining assembly
apply additional forces to the gap making the
replacement of the gap to the original position
very difficult. If you choose to remove the gap,
we do not recommend attempting to replace
it.
Tools Needed
hex Wrench 8mm .............................................. 1
Wrench 12mm ................................................... 1
dead Blow hammer .......................................... 1
To remove the gap:
1.
disConneCt lAthe FroM poWer!
2. to release the taper pins from the gap, slowly
tighten the taper pin hex nuts (see figure
100), then remove the pins.
Cap
screws
figure 100. gap taper pins and cap screws.
3.
remove the four cap screws.
4. tap the outside of the gap with a dead blow
hammer to loosen it, then remove the gap
from the lathe.
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taper pins &
hex nuts
Spindle Bearing
Preload
the Model g9249 is shipped from the factory with
the spindle bearing preload properly adjusted.
however, if the spindle ever develops enough
end-play that the workpiece finish suffers, you
can adjust the bearing preload to remove the
end-play.
Adjusting the spindle bearing preload requires
using a spanner wrench or a punch and hammer.
you can either purchase the spanner wrench at
a tool store or fabricate one using the diagram
shown in figure 101.
7
32
1
4
3
32
figure 101. spanner wrench dimensions.
NOTICE
To fully understand the process of preload-
ing the spindle bearings, read this entire
subsection before performing any of the
steps.
Tools Needed
hex Wrench 5mm .............................................. 1
hex Wrench 8mm .............................................. 1
spanner Wrench, or hammer and punch ......... 1
test indicator ..................................................... 1
small sledge or heavy dead Blow hammer .... 1
Wooden Block ................................................... 1
To adjust the spindle bearing preload:
1. run the lathe for 20 minutes on a high speed
to bring the lathe to a normal operating tem-
perature.
g9249 12" x 37" Belt drive gap Bed lathe
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