Grizzly G4791 Lathe User Manual


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Lathe Bearing
Preload
I]^h aVi]Z ^h h]^eeZY [gdb i]Z [VXidgn l^i] i]Z
aVi]Zhe^cYaZWZVg^c\egZadVYegdeZganVY_jhiZY#>[
i]Zhe^cYaZZkZgYZkZadehZmXZhh^kZZcY"eaVnVcY
i]Z ldg`e^ZXZ [^c^h] hj[[Zgh! ndj XVc VY_jhi i]Z
WZVg^c\egZadVYidgZbdkZi]ZjccZXZhhVgnZcY"
eaVnVcY^begdkZi]Zldg`e^ZXZ[^c^h]#
Note: Lathe spindle end-play can be felt when
attempting to move the spindle toward and away
from the headstock.
Tools Needed Qty
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9^Va>cY^XVidgl^i]BV\cZi^X7VhZ##################### &
=ZVkn9ZVY7adl=VbbZg############################### &
LddYZc7adX`###################################################&
To adjust the lathe spindle bearing preload:
1. Gjc i]Z aVi]Z [dg Veegdm^bViZan '% b^cjiZh
dcV]^\]heZZYidWg^c\i]ZaVi]Zid^ihcdg"
bVadeZgVi^c\iZbeZgVijgZ#
2. 9>H8DCC:8IB68=>C:;GDBEDL:G
3. GZbdkZi]ZX]jX`dg[VXZeaViZ[gdbi]ZaVi]Z
he^cYaZ! i]ZcdeZc i]ZX]Vc\Z \ZVg XVW^cZi
id ZmedhZ i]Z djiWdVgY ZcY d[ i]Z he^cYaZ
hZZFigure 108#
4. ;aViiZc i]Z WZci iVc\ d[ i]Z heVccZg adX`
lVh]Zg l]ZgZ ^i Zc\V\Zh i]Z ^cYZci d[ i]Z
heVccZgcji hdi]Vi i]ZheVccZg cjiXVc WZ
gdiViZY#
5. AddhZci]ZheVccZgcjidcZ[jaaijgcXdjciZg"
XadX`l^hZ#
Note: You may have to tap on the outboard
spindle tube as explained in Step 6 to help
unload the spindle preload and break the
spanner nut loose.
6. EaVXZ V lddYZc WadX` dkZg i]Z djiWdVgY
ZcYd[i]Zhe^cYaZ!VcY]^i^ihdjcYanl^i]i]Z
]ZVknYZVYWadl]VbbZghZZFigure 109#
Ndjg\dVa^hidha^YZi]Zhe^cYaZ[dglVgY_jhi
Zcdj\] id ^cigdYjXZ he^cYaZ ZcY"eaVn i]Vi
ndjXVc[ZZaWn]VcY#
Note: Spindle end-play is felt when you can
move the spindle nose toward and away from
the lathe head.
Figure 109.>cigdYjX^c\YZiZXiVWaZhe^cYaZZcY"
eaVn#
Figure 108.AVi]Zhe^cYaZdjiWdVgYZcY#
HeVccZgCji
He^cYaZ
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