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Do I need a positive or negative rake angle?

Posted on December 17, 2012 at 5:55 AM

The rake or hook angle is the angle of lean on the front of the tooth. You can check it by placing a straight edge between opposite teeth and going through the centre of the blade. The steeper the hook angle the more aggressive the cut - i.e. it bites into the material more.

Woodcutting on portable and table saws typically requires a positive hook.

Negative hook gives resistance to feed so will not climb into the cut, this avoids 'grabbing'. Ideal for cutting using chopsaws and radial arm machines for crosscutting.

There are exceptions to these general rules so refer to your machine's reference guide unless replacing blades like for like or if you are cutting new or unusual materials - aluminium and plastics can be a problem

Categories: TCT Blades