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Model G0853 (Mfd. Since 07/18)
Figure 85. Checking top and bottom riving knife
alignment with blade.
Top Alignment
Bottom Alignment
The riving knife should be parallel with the blade
along its length at both positions and should be in
the "Alignment Zone" shown in
Figure 86.
Figure 86. Verifying that riving knife is in the
alignment zone behind the blade.
Alignment
Zone
Spreader
Blade
Straightedge
If the riving knife is not aligned or parallel with the
blade, refer to
Riving Knife Mounting Block on
Page 93.
The riving knife included with this machine is
0.098" thick and is only designed for 12 " and 14"
diameter blades.
When choosing a main blade, make sure the
blade size meets the requirements listed below.
The thickness of the blade body and teeth can be
measured with calipers or any precision measur-
ing device.
Blade Size Requirements:
•
Body Thickness: 0.108"
•
Kerf (Tooth) Thickness: 0.118"
Blade Requirements
Use the riving knife for all non-through cuts
(defined on
Page 47) or 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.
When to Use Riving Knife
When Not to Use Riving Knife
Although it is possible to use the riving 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 and riving knife instead of just the
riving knife alone for through-cuts.
Minimum 3mm
Top Distance
Bottom Distance
Maximum 8mm
Minimum 3mm
Maximum 8mm
Figure 84. Allowable top and bottom distances
between riving knife and blade.
The riving knife also prevents the freshly cut sides
of the workpiece from pinching the blade and
causing kickback. For maximum effectiveness of
this safety design, the riving knife must be posi-
tioned within 3–8mm of the blade, as shown in
Figure 84.
Once the riving knife is properly positioned at the
correct distance from the blade, verify that it is
aligned with the blade by checking the alignment
with a straightedge in the top and bottom loca-
tions shown in
Figure 85.