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Flexback
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The most common and inexpensive material. The teeth are hardened but the edge opposite the teeth (the back) is not hardened. Hence "flexback". Good for Ferrous Metals, Wood, Plastic, Aluminum and other non-ferrous metals.
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Hardback
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Same as flexback except the back is hardened. Useful
in applications where there is heavy feed, particularly on horizontal
metal-cutting machines. Good for Ferrous Metals, Wood, Plastic, Aluminum and other non-ferrous metals
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Bimetal
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The edge where the teeth are created first has a
strip of High Speed Steel electron beam welded to it. Then the teeth
are milled or ground leaving the HSS only on the points but not in the
gullets where its hardness would cause the blade to break. Useful in
high production or difficult to cut materials. Good for all materials - particularly Stainless Steel.
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Bimetal M42 or Cobalt
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Same process as above except the HSS is of a grade
that has more wear and heat resistance. Although it is often called
"Cobalt" both grades have the same percentage of cobalt but
the element that actually makes the difference is unpronounceable. Best for Stainless Steel and other hard to cut materials.
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Knife edge
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Needs no explanation except that it is Used on
paper, foam and similar materials.
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Wavy Edge
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The cutting edge has a sinusoidal like shape.
Useful
on foam.
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Scolloped
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A wide, shallow "U" shape that comes to a
point. Useful as above but the points make it more aggressive.
Useful
on foam.
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"V"
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Really aggressive on foam. Instead of having one
tooth every inch as Wavy or Scolloped there are 10 or 14 teeth every
inch. Useful
on foam.
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"V" double edge
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Same as above except there is no smooth edge. Useful
for making intricate patterns requiring backing out. Useful
on foam.
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Carbide grit, Diamond grit
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The application for these types is abrasive
materials when nothing else will work. Diamond should not be used on
ferrous metals because the affinity of the carbon in the diamond and
metal microscopically dissolves the diamond! Used on
ferrous metals
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Butcher and Fish band
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A thin blade that is distinctively shiny and is not
protected with any oils.
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