Spindle Break-In; Recommended Adjustments - Grizzly G4003G Owner's Manual

Spindle Break-In

Before subjecting the spindle to operational loads,
it is essential to complete the break-in process.
This helps maximize the life of spindle bearings
and other precision components by thoroughly
lubricating them before placing them under load.
After spindle break-in is complete, we recommend
changing headstock and gearbox oil to remove
any metal particles or debris that are present from
the assembly and break-in process.
The break-in must be performed in succession
with the Test Run procedure described in this
manual, as the steps in that procedure prepare
the lathe controls for the break-in process.
DO NOT perform this procedure indepen-
dently of the Test Run section. The lathe
could be seriously damaged if the controls
are set differently than instructed in that
section.
To perform the spindle break-in:
1. Successfully complete Test Run procedure
beginning on Page 25.
2. Run spindle at 70 RPM for 10 minutes in each
direction (first forward and then reverse).
3. Turn lathe OFF. Move spindle speed levers
to C and 1 for 200 RPM, and run lathe for 5
minutes in each direction.
Model G4003G (Mfd. Since 1/15)
4. Repeat Step 3 for remaining spindle speeds,
progressively increasing to highest speed.
5. Press Emergency Stop/RESET button to turn
lathe OFF.
Congratulations! The spindle break-in is com-
plete. We recommend changing the headstock
and gearbox oil before operating the machine
further (refer to Lubrication on Page 61).
Recommended
Adjustments
The following adjustments have been made at the
factory. However, because of the many variables
involved with shipping, we recommend that you
at least verify the following adjustments to ensure
the best possible results from the lathe.
Step-by-step instructions for these adjustments
can be found on the pages referenced below.
Factory adjustments that should be verified:
• Tailstock alignment (see Page 37).
• Backlash adjustment (see Page 70).
• Gib adjustments (see Page 71).
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