Spindle Brake - Grizzly G9901 Owner's Manual

7.
Refer to the table below for power downfeed
rates, and turn the power downfeed rate dial
to the correct setting for your operation (see
Figure 41).
Dial Position Feed Rate (inches/spindle
1
2
3
Figure 40. Power downfeed rates.
Figure 41. Power downfeed rate dial.
8.
Observe the fine handwheel movement, then
fully push in or pull out the power downfeed
direction pin to select the correct quill direc-
tion for your operation.
Note: When the spindle speed range is
changed, the spindle direction will reverse
and so will the power downfeed direction.
9. To engage the power downfeed, move the
downfeed clutch lever to the left.
Note: When using the power downfeed, the
spindle will automatically return to the top
when the quill dog reaches the downfeed
stop. The accuracy of the power feed to the
downfeed stop is ±0.010".
NOTICE
To avoid damage to the downfeed gearing,
DO NOT use the power downfeed system
for spindle speeds over 2400 RPM.
Model G9901/G9902/G9903 Milling Machine
revolution)
0.0019
0.0035
0.0058

Spindle Brake

After the spindle has been turned OFF, move the
spindle brake lever left or right to bring the spindle
to a full stop (see Figure 42 & 43).
To evenly wear the brake pads, alternate the
direction you move the lever.
Figure 42. Model G9901/G9902 spindle brake
lever.
NOTICE
To avoid premature wear of the brake pads,
use the spindle brake ONLY after power to
the spindle has been turned OFF.
Figure 43. Model G9903 spindle brake lever.
Spindle Brake
Lever
Spindle
Brake
Lever
-37-