Spindle Break-In - Grizzly G0793 Owner's Manual

Spindle Break-In

The spindle break-in procedure distributes lubri-
cation throughout the bearings to reduce the risk
of early bearing failure if there are any "dry" spots
or areas where lubrication has settled in the bear-
ings. You must complete this procedure before
placing operational loads on the spindle for the
first time when the machine is new or if it has
been sitting idle for longer than 6 months.
Always start the spindle break-in at the lowest
speed to minimize wear if there are dry spots.
Allow the spindle to run long enough to warm up
and distribute the bearing grease, then incremen-
tally increase spindle speeds and repeat this pro-
cess at each speed until reaching the maximum
spindle speed. Following the break-in procedure
in this progressive manner helps minimize any
potential wear that could occur before lubrication
is fully distributed.
Complete the spindle bearing break-in pro-
cedure to prevent rapid wear and tear of
spindle components once the drill press is
placed into operation.
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.
-20-
To perform spindle break-in procedure:
1. Set drilling/tapping switch to "drilling" position
(see Figure 14).
Speed
Control
Levers
Spindle
Speed/
Direction
Switch
Spindle
Stop Button
Figure 14. Drilling/tapping switch.
2. Run spindle at 60 RPM for 10 minutes (see
Setting Spindle Speed on Page 25 for
details on how to change speeds).
3. Reverse spindle rotation direction and run
spindle for an additional 10 minutes.
4. Run spindle for 5 minutes in each direction
of spindle rotation. Run following speeds: 90,
120, 260, 600, 1220, and 1740 RPM. Make
sure to only increase speeds in the order
shown.
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).
Model G0793 (Mfd. Since 02/15)
Drilling/
Tapping
Switch
Spindle
Start Button