Stihl 009 Instruction Manual - Page 45

Furthermore, the angles must be the same on all cutters. If angles are uneven: Chain will run roughly, not in a straight line, wear quickly and finally break. 85° 70° 90° 60° 80° 30° 35° 10° 0° 90° 689BA025 KN 689BA022 KN 689BA018 KN As these requirements can be met only after sufficient and constant practice: : Use a file holder* A file holder must be used for manual resharpening of Super chain. The correct filing angle is marked on the file holder. For checking angles STlHL filing gauge* (see table). A universal tool for checking the filing and side plate angles, depth gauge setting and cutter length. Also cleans the guide bar groove and oil inlet hole. File correctly : If you use a file holder, the FG 1 or FG 3: Leave the chain on the bar. : Clamp the bar in a vise if necessary. : Lock the chain - push hand guard forward. : To rotate the chain - pull hand guard against handle. : Sharpen chain frequently, take away as little metal as possible - two or three strokes of the file are usually enough. : Always file from the inside to the outside of the cutter. : The file only sharpens on the forward stroke - lift the file off the cutter on the backstroke. * Special Accessory * Special Accessory 43