What Is a Rake Angle on a Saw Blade?
Blades for both power and hand saws are designed to pass through the working stock by making many small cuts instead of one big cut. Such blades are made with rows of teeth of a triangular shape on which the edge that makes contact with the stock has been machined to a sharp edge.
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Rake Teeth
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Saw teeth with a rake are tilted at a slight angle to the line the blade forms as it moves through the stock. The rake angle is the angle as measured between the face of the tooth and the body of the blade.
Rake Angles
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Saw blades are made with a variety of rake angles, depending on the material that is intended to be cut. Users term the rake angle positive if the tooth angles into the direction of the cut and negative if it angles away from the direction of the cut. Either a positive or negative tooth may be angled to the left or right.
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Zero Rake
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Zero-rake teeth are set in line with the body of the blade, whether a band saw or circular saw. Zero rake teeth are included in a blade to clean the waste material from the saw kerf.
Raker Blade
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A raker blade is a band saw blade designed for woodworking. Raker blades have repeated sets of three teeth: one set to the left, one set to the right and a third tooth with a zero-rake angle.
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References
- Photo Credit saw image by Stanislav Pepeliaev from Fotolia.com
