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Model G0747/G0748 (Mfg. Since 8/12)
-25-
Spindle Break-In
Complete the spindle bearing break-in pro-
cedure to prevent rapid wear and tear of
spindle components once the mill is placed
into operation.
The bearings and gears used in the mill are man-
ufactured to very close tolerances. Before opera-
tional stress is placed on these and other moving
parts in the mill, complete this break-in procedure
to conform these components to one another and
ensure trouble-free performance from the mill.
To perform the spindle break-in procedure:
1. Successfully perform all the steps in the Test
Run section beginning on Page 23.
2. Make sure the spindle is at a complete stop.
3. Set the spindle speed to the low range (refer
to Page 33 or 35 for detailed instructions).
4. Start the spindle rotation at a medium speed
and let the mill run for 20 minutes.
5. Stop the spindle rotation and allow the spin-
dle to come to a complete stop by itself.
6. Set the spindle speed to the high range, then
start the spindle rotation at a medium speed
and let the mill run for another 20 minutes.
7. Stop the spindle rotation, and turn the mill
OFF.
The spindle break-in is now complete!
Since the mill head has been moved around
for shipping purposes, you will need to tram
the spindle with the table to ensure a 90°
alignment. Refer to the Tramming Spindle
section on Page 54 for detailed instructions.
Inspections &
Adjustments
The following list of adjustments were performed
at the factory before the machine was shipped:
• Gib Adjustments .............................. Page 51
• Leadscrew Backlash
Adjustments ..................................... Page 52
Be aware that machine components can shift
during the shipping process. Pay careful atten-
tion to these adjustments during operation of the
machine. If you find that the adjustments are not
set according to the procedures in this manual or
your personal preferences, re-adjust them.