Choosing Blade Tpi - Grizzly G0561 Owner's Manual

Choosing Blade TPI

Selecting the right blade for the job depends on
a variety of factors, such as type, hardness, and
shape of the material being cut, machine capabil-
ity, and operator technique.
The chart in Figure 34 is a basic starting point
for choosing blade type based on teeth per inch
(TPI) for variable tooth pitch blades and for stan-
dard raker type bi-metal blades/HSS blades. As
a general rule, there should be at least 3 teeth in
contact with the workpiece at all times. However,
for exact specifications of bandsaw blades, con-
tact the blade manufacturer.
When cutting structural shapes such as angle iron
or I-beams, workpieces should be positioned to
maintain the same material width throughout the
cut, as illustrated in Figure 33.
Direction
Vice Jaws
(Side View)
Angle Iron
Positioned
For Cut
Figure 33. Structural workpieces positioned in
vise for cut.
Material Width
TOOTH SELECTION
mm 6
10-14
inch ⁄ ⁄
1 1
8 4
Model G0561 (Mfd. Since 01/08)
Saw
Blade
Vice Jaws
I-Beam
Positioned
For Cut
Teeth Per Inch
12 50
8-12 6-10 5-8
1 ⁄ 1 1 1 ⁄ 2
2 2
Figure 34. Material width and recommended teeth per inch.
To select correct blade TPI:
1. Measure material thickness. This measure-
ment is the length of cut taken from where the
tooth enters the workpiece, sweeps through,
and exits the workpiece.
2.
Refer to "Material Width" row of blade selec-
tion chart in Figure 34 and read across to
find workpiece thickness you need to cut.
3.
In the center row, find the TPI that corre-
sponds to the workpiece thickness.
100 150
3-4 2-3
3 4 5 6
200 250
1.4-2.5
7 8 9 10 11
300
12
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