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Old 9th July, 2008, 10:01 PM
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danrok danrok is offline
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Join Date: March 2003
Location: Great Britain
Posts: 18,917

Blades which cut plastics and non-ferrous metals have teeth set at a negative rake angle, unlike wood blades where the teeth are leaning forward. It means that the teeth are kind-of scratching at the plastic, instead of biting in to it, which causes snagging and splitting.
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