Grizzly Vertical Milling Machines G0728 - Manual (Page 22)

-20-
Models G0728–31 (Mfg. Since 11/11)
3. let the mill run at this speed for 20 minutes,
then turn the spindle OFF and wait for it to
stop.
4. turn the spindle direction switch to the rEv
position, and let it run for another 20 minutes.
5. set the spindle speed at 1650 rpM (g0728/
g0729), or 1720 rpM (g0730/g0731), then
repeat
Steps 2–4.
6. turn the mill OFF. the spindle break-in is
now complete and the machine is ready for
operation.
Spindle break-In
it is essential to closely follow the proper break-in
procedures to ensure trouble-free performance of
this mill.
To perform the spindle break-in procedure:
1. adjust the pulleys to set the spindle speed
to 230 rpM (g0728/g0729), or 270 rpM
(g0730/g0731) (see
page 27 for detailed
instruction on Adjusting Spindle Speed).
2. turn the switch to the FWD position.
do not attempt to perform the spindle break-
in until successful completion of the Test
Run section on page 19. failure to complete
the test run of the machine increases the
chance for serious injury or property dam-
age.
Successfully complete the spindle break-in
procedure to avoid rapid wear of spindle
components when placed into operation.
NOTICE
Complete the Initial lubrication procedures
on page 18 before proceeding. failure to
follow reasonable lubrication practices as
outlined in this manual could lead to pre-
mature failure of your mill and will void the
warranty.