Stihl 046 Instruction Manual - Page 47

Maintaining and Sharpening Saw Chain Correctly sharpened chain A properly sharpened chain slices through wood effortlessly and requires very little feed pressure. Do not work with a dull or damaged chain as it will increase the physical effort required, produce unsatisfactory results and a higher rate of wear. Clean and check your chain for cracks in the links and damaged rivets replace any damaged or worn parts of the chain and match the new parts to the shape and size of the original parts. Important: It is absolutely imperative to comply with the angles and dimensions specified below. If the saw chain is incorrectly sharpened - and in particular if the depth gauge is set too low - there is a risk of increased kickback of the chainsaw, with resulting danger of injury. Select the appropriate sharpening tools for the chain pitch. See "Technical Data" for the permitted chain pitches. 3/8 The chain pitch (e.g. 3/8) is marked on the depth gauge side of each cutter. Use only special saw chain files Other files have the wrong shape and cut. Select file diameter according to chain pitch - see table at the end of this chapter. You must observe certain angles when resharpening the chain cutters 689BA020 KN 689BA021 KN A B A = Filing angle B = Side plate angle Chain type Rapid-Micro (RM) Rapid-Super (RS) Picco-Micro (PM/PMN) Angle (°) AB 30 85 30 60 30 85 Cutter shapes: Micro = Semi-chisel Super = Full chisel Specified angles A and B are obtained automatically if recommended files or sharpening tools and correct settings are used. 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. 45