Selecting Blades - Grizzly T28366 Owner's Manual

Selecting Blades

Selecting the right blade for the cut requires an
understanding of various blade characteristics.
Grizzly recommends the T28368 10" x 160T cold
cut saw blade (see Figure 39 on Page 29), which
is designed for cutting rectangular, square, and
round metal workpieces.
Blade Terminology
B
D
F
C
E
Figure 24. Blade terminology.
A. Blade Size (Diameter): The overall diameter
of the blade.
B. Pitch: The distance from the tip of one tooth
to the tip of the next. Typically given in Teeth
Per Inch (TPI).
C. Gullet: The shallow area between the tips of
the teeth.
D. Front Rake Angle: The measurement of the
angle formed between the tip of the blade
tooth and a line tangent to the perimeter of
the blade.
E. Rear Rake Angle: The measurement of the
angle formed between the face of the tooth
and the diameter of the blade.
F. Tooth Depth: The distance from the tip of the
tooth to the bottom of the adjacent gullet.
G. Kerf: The width of the cut created by the
blade.
Model T28366 (Mfd. Since 04/18)
Blade Pitch
The most important consideration when selecting
a blade for the Model T28366 is blade pitch, which
is typically measured in "teeth per inch" (TPI).
Proper TPI for any cut depends on the cross-sec-
tion size and wall thickness of the workpiece.
If the blade pitch is too coarse for the cut, there
will be too few teeth making the cut at any given
time. This results in broken blade teeth and rough
cuts due to excessive strain applied to both the
blade and the workpiece (see Figure 25). Use a
blade pitch that keeps at least three teeth in the
workpiece at any time.
A
G
Conversely, if the blade pitch is too fine for the
cut, teeth will remain in the workpiece and remove
more material than the blade gullet can hold. This
buildup of chips prevents the teeth from cutting
effectively and results in poor cutting efficiency,
overheating, and rapidly rounded-off teeth (see
Figure 26).
Blade
(TPI Too Coarse)
Broken
Tooth Tip
Workpiece
Figure 25. TPI too coarse for workpiece.
(TPI Too Fine)
Gullet
Excessive
Chip Buildup
Figure 26. TPI too fine for workpiece.
Blade
Workpiece
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