Reply by SnowyRiver

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Posted on Tablesaw Blade 101

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51457 posts in 3476 days

#1 posted 12-24-2009 11:11 PM

If you put a straight edge from the center of the hole and out to the tooth tip, the angle of the cutting tooth in relation to the straight edge is the hook angle.

If there is a space there it is positive hook angle and if the tooth is partially behind the straight edge it is negative hook angle.

You would use a positive hook angle say 5 to 10 deg. for a table saw where you push the wood through the blade.

You would use a negative 6 deg. hook angle for a sliding mitre box or radial arm saw where the wood is held stationary and the blade is pulled through. With a positive hook angle in this application, the blade would try to climb through the wood on its own and the operator would have to actually hold the sliding arm from going too fast. This is very dangerous, having to slow down the moving blade, so a negative hook angle is a must.

-- Wayne - Plymouth MN

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