The angles

The choice of angles is very important because it determines :

  • The penetration power of the blade into the wood
  • The rigidity of the tooth
  • The cutting strength

Given that the sum of the 3 angles equals 90°, each angle determines the other.

a) Rake angle Â

It should be as wide as possible in order to easily cut the wood fibres. It varies between 25° (hard wood) and 35° (soft wood).

NB : The hook angle depends on the tool support and the type of wood to be cut (see table below).

b) Nose angle β

It ensures the rigidity of the tooth and varies between 40° and 55°.

c) Clearance angle D

It varies between 8° and 12°

Band saw blades simple and double cut