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To check the depth gauge setting, use the appropriate filing gauge for the chain pitch. Step 3: Check the filing resultĪs you sharpen the saw tooth, the depth gauge setting will automatically decrease. Once you have sharpened all the cutting teeth, you must check the depth gauge setting and adjust it if necessary. This eliminates the need for time-consuming filing involving higher levels of material removal. We recommend that you file more frequently as part of your regular maintenance. File the master tooth until a perfect cutting edge is achieved. Guide the file so that a quarter of the file diameter protrudes beyond the top of the tooth. a file angle plate), you can easily orientate your movements to the markings on it to maintain the correct angle. STIHL saw chains are sharpened at a 30-degree sharpening angle as standard – if you use a filing aid (eg. Rotate the file at regular intervals to avoid one-sided wear of the file. The file should only sharpen on the forward stroke – lift the file off for the backstroke.
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Start with the master tooth and place the file in the tooth so that it can be guided along the tooth while applying pressure from the inside outwards.Īlways file at a 90-degree angle to the guide rail. Guide the file by holding the handle with one hand and passing the file in forward strokes past the tooth with the other . Once you have calculated the value, simply search for the corresponding saw chain file diameter in the STIHL conversion table: However, since the chain pitch is always in inches, you will still need to convert the result accordingly: one millimetre equals 0.039 inches, which means that you must multiply the measurement in millimetres by 0.039 to obtain the corresponding value in inches. For example, you would measure the distance from the centre of one riveted bolt to the centre of the next one using a calliper, and divide the result by two to obtain the chain pitch in millimetres. Alternatively, you can calculate the chain pitch. If the number on the depth gauge is no longer legible, the chain pitch can be determined by means of a chain reference guide. You can easily find out the chain pitch for all STIHL saw chains by checking the identification number on the depth gauge. You can then simply check the required file diameter in the STIHL conversion table. The chain pitch assigns a chain to certain chainsaw performance classes. Each chain pitch is assigned a specific round file diameter.Ĭhoosing t he right round file for sharpening your chainsaw The right round saw chain file to choose depends on the chain pitch of your saw chain. However, the tool you use has to match the saw chain.If you use the wrong file you can actually reduce the cutting performance of the chain. You can sharpen the cutting teeth of your chipper tooth saw chain yourself using a round file.