Spindle Break-In - Grizzly G0720R Owner's Manual

Spindle Break-In

Before putting this machine into full service, the
Test Run must be completed and the spindle
bearings must be broken in.
DO NOT leave the area while break-in pro-
cedure is under way. You must be ready to
stop the machine if any problem occurs.
To break in the machine:
1. Move the MILLING & TAPPING mode switch
(see Figure 9) to the TAPPING position.
Milling &
Tapping
Mode
Switch
Spindle Rotation Direction Buttons
Figure 9. Tapping controls.
Model G0720R (Mfg. Since 11/10)
2.
Push the START button.
Note: When in tapping mode, the spin-
dle speed is reduced by half automatically,
and the speed range will be 50–800 RPM.
Tapping requires lower speeds than other
milling operations.
3.
Rotate the spindle speed dial so the spindle
runs at 500 RPM, and let it run for ten min-
utes.
4. Increase the speed to 800 RPM, and let it run
for another ten minutes.
5. Push the EMERGENCY STOP button, and
rotate the spindle speed dial counterclock-
wise to its minimum position.
6. Start the mill, and push one of the three but-
tons on the end of the downfeed handles to
reverse spindle rotation.
7.
Run the mill again at both speeds (as
described above) to finish the break-in proce-
dure.
8.
Move the MILLING & TAPPING mode switch
to the MILLING position, then run machine at
a speed of 1600 RPM for ten minutes.
9. Run the machine at 800 RPM for another 15
minutes to allow it cool down.
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