Adjusting Hold-Down Height; Positioning The Workpiece - Grizzly G0642 Owner's Manual

Adjusting Hold-down
Height
The hold-downs must firmly hold the workpiece
during the boring operation. They are adjustable
to accommodate the thickness of your stock.
To adjust the height of the workpiece hold-
downs:
1.
DISCONNECT THE BORING MACHINE
FROM POWER!
2. Loosen the lock collar set screw so that the
collar moves freely on the hold-down shaft
(see Figure 17).
Lock
Collar
Figure 17. Workpiece hold-down (boring head
guard removed for photo clarity).
3. Lift the hold-down up until the bottom is just
slightly higher than your workpiece when the
boring head assembly is in the upper posi-
tion, then re-tighten the locking collar set
screw to secure the setting.
NOTICE
Make sure the hold-downs exert enough
pressure to keep the workpiece in place
against the rotational force of the boring
bits. Otherwise, the workpiece may move
during the boring operation, resulting in a
drilling line that is out of alignment.
-18-
The workpiece is positioned along the longitudinal
and cross paths to align the boring bits with the
desired line of drilling.
To position the workpiece for drilling:
1.
2.
Set Screw
Hold-down
fence from boring bit centers, as read on the
If both ends of the longitudinal fence are
not the same distance from the boring bit
centers, the drilled holes will not line up
correctly. Make sure that both ends of the
longitudinal fence are the same distance
from the boring bit centers before you tight-
en the locking levers.
Positioning the
Workpiece
Turn the machine OFF.
Unlock the longitudinal fence and move it
along the cross fences to reach the correct
distance from the boring bits along its entire
length, then use the locking levers to secure
it in place.
Note: The distance from the longitudinal
fence to the boring bit centers can be mea-
sured on the cross fence scale, as shown in
Figure 18.
Figure 18. Distance of 4" of the longitudinal
cross fence scale.
NOTICE
Model G0642 15-Bit Line Boring Machine