Page "Chainsaw" Paragraph 7
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* Cutting chain — Usually each segment in this chain ( which is constructed from riveted metal sections similar to a bicycle chain, but without rollers ) features small sharp cutting teeth.
Each tooth takes the form of a folded tab of chromium plated steel with a sharp angular or curved corner and two cutting edges, one on the top plate and one on the side plate.
Chains come in varying pitch and gauge ; the pitch of a chain is defined as half of the length spanned by any three consecutive rivets ( e. g., 0. 325 inch ), while the gauge is the thickness of drive link where it fits into the guide bar ( e. g., 0. 05 inch ).
Built into each tooth is a depth gauge or " raker " which rides ahead of the tooth and limits the depth of cut, typically to around 0. 025 ".
If left too high they will cause very slow cutting, if filed too low the chain will become more prone to kick back.
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