How to sharpen a chainsaw chain
Choose a round file suitable for repairing the saw chain. The cutting teeth, size, and arc of various types of saw chains are different. Each type of chain requires a certain round file standard. There are detailed instructions in the manual, and you must pay attention to them.
Pay attention to the direction and angle of the file. The file should be repaired in the direction of the cutting edge. When pulling back, it should be light. Do not use force back and forth as much as possible. Generally, the angle of the cutting edge of the saw chain is about 30 degrees, and the front is high and the back is low. The included angle is about 10 degrees. These angles vary according to the hardness of the material being sawed and the usage habits of the saw. At the same time, attention should be paid to the symmetry of the left and right cutting teeth. If the deviation is too large, the saw will run off and the saw will be oblique.
Pay attention to the height of the limit tooth. A part of the front of each cutting tooth protrudes, this is the limit tooth, which is 0.6---0.8 mm lower than the upper edge of the cutting edge, and the cutting amount per tooth is so thick. When filing the cutting edge, pay attention to its height. If the cutting edge is repaired more, the relative cutting edge of the limit tooth will become higher, and the cutting amount will be smaller each time, which will affect the cutting speed. If the cutting edge is lower than the limit tooth, it will produce no wood, Unable to cut, the limit tooth repair file is too low, and each tooth is too thick each time, it is likely to cause the "knife" and the saw will not move.
The maintenance of the saw chain
The saw chain runs fast. Taking a 3/8 saw chain as an example, the number of sprocket teeth is 7 teeth. When the engine speed is 7000 rpm, the running speed of the saw chain is 15.56 meters per second. The driving force of the sprocket and the reaction force during cutting are concentrated on the rivet shaft. The working conditions are bad and the wear is serious. If you do not pay attention to maintenance, the saw chain will be quickly scrapped.
Maintenance is carried out from the following aspects:
- Always pay attention to adding lubricating oil;
- Keep the cutting edge sharp and the symmetry of the left and right cutting teeth;
- Adjust the tension of the saw chain frequently, not too tight or too loose. After adjusting the saw chain, when the chain saw chain is lifted up, there is only one middle guide tooth that completely exposes the guide plate slot;
- Clean and clean the guide plate groove and the dirt of the saw chain in time, because the guide plate and the saw chain will be worn during sawing, and the worn-down iron filings and fine sand will accelerate the wear, and the gums on the trees, especially the grease on the pine trees. , During the sawing process, the heat and melting will adhere to the saw chain, making each joint sealed, hard, and oil can't get in, it can't be lubricated, and it will accelerate wear. It is recommended to remove the saw chain after daily use and soak it in kerosene for cleaning.