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Model G0756 (Mfg. Since 2/13)
-21-
Spindle Break-In
Before subjecting the spindle to operational loads,
it is essential to complete the break-in process.
This helps ensure maximum life of spindle bear-
ings and other precision components by thor-
oughly 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 drill press for the break-in process.
DO NOT perform this procedure indepen-
dently of the Test Run section. The drill
press could be seriously damaged if the
controls are set differently than instructed
in that section.
To perform the spindle break-in procedure:
1. Move the drilling & tapping switch to the drill-
ing position (see Figure 15).
Figure 15. Drilling/tapping switch.
Drilling and
Tapping
Switch
2. Position the speed control levers for 440
RPM.
3. Press the spindle start button.
4. Allow the machine to run for 10 minutes.
5. Press the spindle stop button.
6. Position the speed control levers for 870
RPM, and allow machine to run for 10 min-
utes.
7. Press the OFF button, and adjust the speed
control levers for 440 RPM.`
8. Press the spindle start button.
9. Press the button on the end of the downfeed
handle to reverse spindle rotation.
10. Run the machine at 440 RPM and then 870
RPM for 10 minutes each, as described
above.
11. Run the machine at 440 RPM for another 15
minutes to allow it cool down.
Spindle
Start Button
Congratulations! Spindle break-in is complete. We
recommend changing the headstock and gearbox
oil before operating the machine further (refer to
lubrication on Page 33).