How to sharpen the carpenter's saw?

1. Explain that the grindstone is a double-sided grindstone (one side is thick and the other side is thin). Hold the planer with both hands and press down. Grind the plane to a 40-degree cross section with the rough surface on the reverse side of the grindstone, and pull it back and forth in parallel (the plane and the grindstone form 30 degrees).

2, rough grinding first, after grinding, in a place with strong light, until you see a little cutting edge on the blade, and then use a fine grinding stone mill. If you look closely, you will know that there is no sand hole in the blade.

3, or there are several scratches on the hand, if it feels like Mao Mao, it means success; If it feels slippery, you must grind it again. Then turn off the lights slowly with the reverse side. (Be sure to use even force when polishing, and polish it twice with water before polishing).

4, avoid by all means: do not use power tools to polish, otherwise the plane is easy to fade, and the faded steel is scrap iron. It is best to polish the planer with a special tool.