Grizzly G0493 - Manual (Page 42)

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Model g0493 (Mfg. since 7/10)
the blade guard spreader and riving knife must
be correctly installed, adjusted, and aligned in
order to provide the maximum safety benefit.
aside from the height setting, the blade guard
spreader should be installed and adjusted in the
same manner as described for the riving knife.
the spreader/riving knife attaches to the mounting
block as shown in
figure 67.
Height Difference
Minimum 1mm
Maximum 5mm
figure 68. riving knife height setting below
blade.
Minimum 3mm
Top Distance
Bottom Distance
Maximum 8mm
Minimum 3mm
Maximum 8mm
figure 69. allowable top and bottom distances
between spreader/riving knife and blade.
blade guard spreader & riving Knife
installation & adjustment
secure the riving knife so that the top of it is
1–5mm below the top level of the blade, as shown
in
figure 68.
figure 67. installing spreader/riving knife on the
mounting block.
1
2
3
the height difference between the riving knife and
the blade allows the workpiece to pass over the
blade during non-through cuts (those in which the
blade does not cut all the way through the thick-
ness of the workpiece).
the spreader/riving knife prevents the freshly cut
workpiece from pinching the blade and caus-
ing kickback. For maximum effectiveness, the
spreader/riving knife must be positioned 3–8mm
from the blade, as shown in
figure 69.
once the spreader/riving knife is properly posi-
tioned behind the blade, verify that it is also
aligned with the blade by placing a straightedge
along the top and bottom locations shown in
figure 70.
figure 70. Checking spreader/riving knife
alignment with blade at the top and bottom.
Top Alignment
Bottom Alignment
the spreader/riving knife should be parallel with
the blade along its length at both positions and
should be in the "alignment zone" shown in
figure 71.
figure 71. verifying that spreader/riving knife is
in the alignment zone behind the blade.
Alignment
Zone
Spreader or
Riving Knife
Blade
Straightedge
if the spreader/riving knife is not aligned or paral-
lel with the blade, refer to
adjusting mounting
block on page 72.