Makita XCU06Z XCU06T Instruction Manual - Page 17
Sharpening the saw chain
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NOTICE: Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result. To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts. Sharpening the saw chain Sharpen the saw chain when: • Mealy sawdust is produced when damp wood is cut; • The chain penetrates the wood with diffi- culty, even when heavy pressure is applied; • The cutting edge is obviously damaged; • The saw pulls to the left or right in the wood. (caused by uneven sharpening of the saw chain or damage to one side only) Sharpen the saw chain frequently but a little each time. Two or three strokes with a file are usually sufficient for routine resharpening. When the saw chain has been resharpened several times, have it sharpened in our authorized service center. Sharpening criteria: WARNING: An excessive distance between the cutting edge and depth gauge increases the risk of kickback. 2 1 2 1 3 1 - The best cutting results are obtained with following distance between cutting edge and depth gauge. • Chain blade 90PX : 0.65 mm (0.025″) 30 30 55 55 - The sharpening angle of 30° must be the same on all cutters. Different cutter angles cause the chain to run roughly and unevenly, accelerate wear, and lead to chain breaks. - Use a suitable round file so that the proper sharpening angle is kept against the teeth. • Chain blade 90PX : 55° File and file guiding - Use a special round file (optional accessory) for saw chains to sharpen the chain. Normal round files are not suitable. - Diameter of the round file for each saw chain is as follows: • Chain blade 90PX : 4.5 mm (3/16″) - The file should only engage the cutter on the forward stroke. Lift the file off the cutter on the return stroke. - Sharpen the shortest cutter first. Then the length of this shortest cutter becomes the standard for all other cutters on the saw chain. - Guide the file as shown in the figure. ► 1 . Cutter length 2. Distance between cutting edge and depth gauge 3. Minimum cutter length (3 mm (1/8")) - All cutter length must be equal. Different cutter lengths prevent the saw chain from running smoothly and may cause the saw chain to break. - Do not sharpen the chain when the cutter length has reached 3 mm (1/8") or shorter. The chain must be replaced with new one. - The chip thickness is determined by the distance between the depth gauge (round nose) and the cutting edge. 1 2 ► 1 . File 2. Saw chain 17 ENGLISH