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Tooth Config / Pitch Primer | Bandsaw Blades

What tooth pitch should you use?

Here you’ll find some helpful tips for optimizing tooth pitch, averaging variable pitch, and items that influence tooth pitch selection.

Remember…

  • Selecting the correct tooth pitch is important for optimized cutting results.
  • The tooth pitch results from the engaged length of the blade in the material.
  • If the tooth pitch is too small, irregular cutting may result. Chips may clog the cutting length, forcing the blade from its cutting line.
  • If the tooth pitch is too large, teeth may break out because the cutting pressure acting upon individual teeth becomes too high.
  • At least 3 teeth are recommended to be engaged to achieve an optimum cutting result.

As always, if you have any questions give us a call, or send us a message!

ITEMS THAT INFLUENCE TOOTH PITCH SELECTION

Material Shape

  • Complex shapes can easily strip teeth. It is best to use a blade with less face rake angle when cutting structurals and other complex shapes.

Chip Formation

  • Hard materials require a small, strong tooth shape.
  • Soft materials make large chips that fill up the gullet quickly. Select a large gulleted blade.

Chip Length

  • The longer the tooth is in the cut, the more chip that will be generated, and the more gullet area that will be needed to hold the chip.
  • Cutting stops when the gullets are full.

OPTIMIZING TOOTH PITCH

Always strive for a minimum of 3 teeth and a maximum of 24 teeth in the cut. (6 to 12 teeth in the cut at any time is the optimum)

Soft materials (example: carbon) ……… 3-6 teeth in the cut average.

Hard materials (example: die steels) ……… 18-24 teeth in the cut average.

Tough materials (example: Inconel) ……… 12-18 teeth in the cut average.

AVERAGING VARIABLE PITCH TEETH

PITCH AVERAGE # OF TPI
3-4 PITCH 3-1/2 TPI
4-6 PITCH 5 TPI
5-8 PITCH 6-1/2 TPI
6-10 PITCH 8 TPI

EXAMPLE:

4″ bar stock – using a 3-4 TPI blade
Avg. TPI = 3 + 4 ÷ 2 = 3.5
(Bar stock size, multiplied by the average TPI = no. of teeth in the cut)
(4 x 3.5 = 14)

3-4 pitch would give us 14 teeth in the cut
4-6 pitch would give us 20 teeth in the cut
5-8 pitch would give us 26 teeth in the cut
6-10 pitch would give us 32 teeth in the cut