Grizzly G0651 - Manual (Page 43)

model g0651/g0652 (mfg. since 1/10)
-41-
Riving Knife
the riving knife works in the same manner as
the spreader on the blade guard assembly. it is a
metal plate that prevents the newly cut workpiece
from pinching the backside of the blade and caus-
ing kickback.
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the key difference between the spreader and the
riving knife is that the riving knife mounts below
the blade's highest point of rotation, as shown in
Figure 55.
Figure 55. height difference between riving knife
and blade.
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 riving knife acts as a barrier behind the blade
to reduce the risk of hands being pulled into the
blade if kickback occurs.
the riving knife must be kept within the range
shown in
Figure 56. For that reason, a 10" blade
is required for operations that use a riving knife.
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Figure 56. allowable top and bottom distances
between riving knife and blade.
In order to work properly, the riving knife
cannot be bent or misaligned with the
blade. If the riving knife gets accidentally
bent, take the time to straighten it or just
replace it. using a bent or misaligned riving
knife will increase the risk of kickback!
When to use the Riving Knife
use the riving knife for all non-through cuts made
with a standard table saw blade (i.e., dadoes or
rabbet cuts, and when using a tenoning jig), or
when using a 10" diameter dado blade.
also, use the riving knife for those special opera-
tions where the blade guard or its components
get in the way of safe operation, such as with very
narrow cuts.
how to Install the Riving Knife
the riving knife is installed in a similar manner
to the blade guard and spreader. refer to
Blade
Guard on page 38 for installation instructions.
When Not to use the Riving Knife
do not use the riving knife with a dado blade that
has a diameter smaller than 10". otherwise, the
riving knife height will exceed the blade height and
the workpiece will hit the riving knife during the
cut, forcing the operator into a dangerous situa-
tion of trying to turn the saw off with the workpiece
stuck halfway through the cut.
in addition, although it is possible to use the riv-
ing knife for through cutting operations, the blade
guard assembly offers far more injury protection
and risk reduction than the riving knife. therefore,
we strongly recommend that you use the blade
guard assembly instead of the riving knife for
through cuts.
To ensure that the riving knife works safely, the
specifications listed in Blade Requirements
on page 36 MuST be met when installing new
blades.
The riving knife MuST be aligned/adjusted
to blade. These requirements do not apply to
dado blades.