Things You Should Know About Your

Having a sharp blade on a chainsaw the chain link. The curve of the file should not only saves effort and wear on your fit the curve of the face of the cutting tip, Tips equipment, but makes using it more safe. and the top of the file should be nearly Here are some tips for sharpening your flush with the top of the tooth. • Buy the correct size file for your . own saw. Hold the file at the same angle that the • It is recommended that after a chain has been hand sharpened five times, it should be 1) Determine the size or of your cutter is ground or filed to begin with. The ground by a chainsaw shop to correct any saw's chain. You will need to buy either a standard angle is about 25 degrees on variations in tooth pitch that occurred during rotary grindstone or chainsaw file/rattail most . Special "ripping" chains may filing. file that matches your blade. Since there • Use a chainsaw file guide to maintain have a flatter angle, and it is essential to the correct angle of your file stroke when fil- are several sizes of chainsaw teeth, the match the angle the chain is originally ing your blade. grindstone or file you choose must be the machined to. • Look for wear on the drive links, the correct diameter for your saw. Typical 7) Slide the file across the face of the blade , and sprocket often. Chains can break and cause serious injury or death when sizes are 3/16, 5/32 and 7/32 inches in cutter, using a moderate twisting motion operated with worn or damaged parts. diameter. to discharge metal chips (filings) that are 2) Clean the chain thoroughly. You removed. There is some difference in opin- Warnings may use mineral spirits or a commercial ion as to the best direction for pushing the • It is recommended to wear gloves and degreasing detergent to remove oil, dirt, file, but usually you will push the file safety glasses during the sharpening process. and debris from your chain. Do not flood from the short side of the angle toward You are dealing with extremely sharp edges, or get excessive cleaner on the engine or the long point. This should leave a and without gloves a cut can happen easily. With a hand file, however, safety glasses are other components, since some of these smoother cutting surface. not a requirement. products can damage the plastic housing 8) Work each tooth with the same • Do not force the chainsaw file, it could or other parts. angle from one side of the chain around shatter if too much force is applied. • Sharpened or new chains require correct 3) Inspect the chain for damaged or the loop. As you progress around the practices and quality. It is recommended to overworn links and teeth. Individual teeth chain, you will want to spin it so the teeth fully saturate (soak) the cleaned or new chain may become chipped, broken, or bent, you are filing are on the flat top side of in the recommended oil.[l] making them dangerous to use. As a rule your bar. • Manufacturers recommend checking and readjusting chains often especially when first of thumb, the top plate (flat surface at the 9) Reverse sides of the saw, and pro- using a new chain (breaking-in). Oregon rec- top of cutting teeth) should be at least 1/4 ceed around the unfiled teeth angled in ommends checking frequently during the first inch in length. If it is worn shorter than the other direction. Keep an eye on the half hour of use. this, there is a risk it will break while • It may not be necessary to use the length of each flat top of the cutter. Some "brand name" chains as store/ distributor operating your saw. Any damaged, weak- manufacturers suggest measuring with brands are made by only a few manufacturers, ened, or overworn chains should be dis- calipers to ensure an equal "bite" as the and most do use the standard designed carded. saw is cutting, but if you have a good eye, chains, but original manufacturer's recom- mend using their own oil, chains and chain 4) Set your saw on a solid surface or you should be close enough to get fairly bars. Which is to be expected. Use the chain the bar in a . The saw must be good results. with the correct pitch, gauge, and profile stable and the blade must be supported in 10) Check the clearance of the rakers always. As long as these three parameters are correct, you will have no problem. a stationary manner to file your saw safely (depth gauge), the curved hook shaped • Not all chain bars are standard in how and accurately. Clamping the bar in a vise, links between the cutters. They should they are attached or adjusted, so be sure that with the jaws holding the bar and allow- clear each cutting edge about one tenth of those functions will work properly on your ing the chain to rotate freely is the ideal an inch lower than the cutter. This gauges saw. • Caution: For best readjustment adjust method of holding it. the amount of chip that the cutter removes when cooled as all chains tend to loosen as 5) Locate the leading cutter. This will on each pass through the . A special they are being used - even after "break-in" - be the shortest cutter on the chain. If all of that is laid on top of the blade is expanding from heat or wear. • If adjusted while hot, then when cool the cutters seem to be the same length, available from chainsaw dealers or hard- they will shrink and may bind and not operate you may start anywhere. The main con- ware stores. If the gauge is too high, and until loosened (so that is why they need to be cern is that you file each cutter so that the must be filed, this tool protects the adja- adjusted when cool). flat on top of the cutter is very nearly the cent tooth as you file the gauge down. Things You'll Need: same length, so that they each cut away 11) File any raker/depth gauges that the same amount of wood as they pass interfere with the cutter (that are too • Chainsaw (rattail) file. through the kerf of your cut. It also may high) with a flat mill bastard file (not like- • Flat, mill bastard file. help to mark the first tooth you file with a • File guide or gauge. ly to be needed, but possible as a defect). • Safety equipment. dab of white out or a permanent marker. Oil your chain (saturate/ soak with oil), • for adjusting your saw chain. 6) Set your file in the notch on the check the tension, and you should be • Cleaner and rags. front of the cutter. This is the angled ready to cut once again. "tooth" on the front of the flat surface of