Stihl HT 75 Instruction Manual - Page 40
Depth gauge setting, Lowering depth gauges, when the chain is sharpened because
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english 689BA047 KN : Rotate the file at regular intervals while filing to avoid one-sided wear. : Use a piece of hardwood to remove burrs from cutting edge. : Check angles with the filing gauge. All cutters must be the same length. If the cutters are not the same length, they will have different heights. This makes the chain run roughly and increases the risk of breakage of the chain. : Find the shortest cutter and then file all other cutters back to the same length - it is best to have this work done in a workshop on an electric grinder. Depth gauge setting a The depth gauge determines the height at which the cutter enters the wood and thus the thickness of the chip removed. Distance between depth gauge and cutting edge a = 0.018"(0.45 mm). This setting may be increased by 0.008" (0.2mm) for cutting softwood in mild weather season - no frost. 689BA023 KN 1 : Place a filing gauge (1) that matches the chain pitch on the chain - if the depth gauge projects from the filing gauge, the depth gauge has to be lowered. Lowering depth gauges The depth gauge setting is reduced when the chain is sharpened because the top plate of the cutter slopes downward towards the back. : Check the depth gauge setting every time you sharpen the chain. : File down the depth gauge until it is level with the filing gauge. 689BA051 KN HT 70, HT 75 39