Stihl MS 150 C-E Instruction Manual - Page 42

689BA027 KN 689BA021 KN 689BA025 KN English Chain pitch Sharpening and side plate angles File holder A a B 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. 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. N Use a file holder Always use a file holder (special accessory, see table "Sharpening tools") when sharpening saw chains by hand. File holders have markings for the sharpening angle. Use only special saw chain files! Other files are unsuitable in terms of shape and type of cutting. To check the angles STIHL filing gauge (special accessory, see table "Sharpening tools") - a universal tool for checking sharpening and side plate angles, depth gauge setting, and tooth length, as well as cleaning grooves and oil inlet holes. 001BA203 KN 40 MS 150 TC