Step 2: Sharpen both sides of the chain one after the other
Guide the file by holding the handle with one hand and moving the file in a forwards motion past the cutting tooth with the other hand. Start with the guide tooth and set it. File into the cutting tooth in such a way that the file can be guided along it using pressure from the inside to the outside.
Always file at right angles to the guide rail. The right sharpening angle depends on the saw chain and the wood that you want to cut. The sharpening angle will generally be between 25° and 35° – the harder the wood, the greater the angle. To maintain the correct angle, we recommend that you use a sharpening grid or a filing gauge as an aid.
When filing, make sure that the file only grips in the forwards stroke and that you lift it slightly when pulling it back again. Turn the file at regular intervals so that it does not become worn on one side.
The perfect filing result and therefore the perfect sharpness is achieved when you see a continuous burr on the cutting edge that does not reflect light.
Repeat the filing process for each tooth until you reach the guide tooth again. Make sure that you file all teeth to the same length. Then turn the saw by 180° and work on the other side of the saw chain.