Stihl MS 193 C-E Product Instruction Manual - Page 46
Maintaining and Sharpening, the Saw Chain
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English Maintaining and Sharpening the Saw Chain Sawing effortlessly with a properly sharpened saw chain A properly sharpened saw chain cuts through wood effortlessly even with very little pushing. Never use a dull or damaged saw chain - this leads to increased physical strain, increased vibration load, unsatisfactory cutting results and increased wear. N Clean the saw chain N Check the saw chain for cracks and damaged rivets N Replace damaged or worn chain components and adapt these parts to the remaining parts in terms of shape and level of wear - rework accordingly Carbide-tipped (Duro) saw chains are especially wear-resistant. For an optimal sharpening result, STIHL recommends STIHL servicing dealers. WARNING Compliance with the angles and dimensions listed below is absolutely necessary. An improperly sharpened saw chain - especially depth gauges that are too low - can lead to increased kickback tendency of the chain saw - risk of injury! Chain pitch a The chain pitch marking (a) is embossed in the area of the depth gauge of each cutter. Marking (a) 7 1 or 1/4 6, P or PM 2 or 325 3 or 3/8 4 or 404 Chain pitch Inches mm 1/4 P 6.35 1/4 6.35 3/8 P 9.32 0.325 8.25 3/8 9.32 0.404 10.26 The diameter of file to be used depends on the chain pitch - see table "Sharpening tools". The angles of the cutter must be maintained during resharpening. 689BA027 KN 689BA021 KN Sharpening and side plate angles A B A Sharpening angle STIHL saw chains are sharpened with a 30° sharpening angle. Ripping chains, which are sharpened with a 10° sharpening angle, are exceptions. Ripping chains have an X in the designation. B Side plate angle The correct side plate angle results automatically when the specified file holder and file diameter are used. Tooth shapes Micro = semi-chisel tooth, e. g., 63 PM3, 26 RM3, 36 RM Super = full chisel tooth, e. g., 63 PS3, 26 RS, 36 RS3 Ripping chain, e. g., 63 PMX, 36 RMX Angle (°) AB 30 75 30 60 10 75 The angles must be identical for all cutters in the saw chain. Varying angles: Rough, uneven running of the saw chain, increased wear - even to the point of saw chain breakage. 44 MS 193 C