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The chart below is a basic starting point for
choosing blade type based on teeth per inch
(TPI) for variable tooth pitch blades and for
standard raker type bimetal blades/HSS blades.
However, for exact specifications of bandsaw
blades, contact the blade manufacturer.
Here are some general rules of thumb with
respect to bandsaw blade use.
• At least three teeth must contact the metal
at any phase of the cut. Otherwise, the
teeth can load up with metal, fracture, and
break off. If the TPI is too high, the teeth
can load up with material and overheat,
damaging the blade.
• For a faster but rougher cut, use a blade
with a lower TPI and a higher feed rate.
• For a slower but smoother cut, use a blade
with more TPI and a lower feed rate.
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(% Measure the material thickness. This
measurement is the length of cut
taken from where the tooth enters the
workpiece, sweeps through, and exits the
workpiece.
)% Refer to the "Material Thickness" row of
the blade selection chart in =`^li\)-, and
read across to find the workpiece thickness
you need to cut.
*% Refer to the "Shape" of metal and "Material
Type" columns, and find the shape and
material to be cut.
+% In the applicable row, read across to the
right and find the box where the row and
column intersect. Listed in the box is the
minimum TPI recommended for the variable
tooth pitch blades, and the TPI for bimetal
raker blades in parentheses.
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