A circular saw blade is a toothed disk that can cut a range of materials through a rotating motion. They can be installed on chainsaws that cut many materials, such as wood, masonry, plastic, or metal. Most circular saws come standard with a 7¼-inch diameter blade and a motor that can absorb 8 to 15 amps of power.
Blade diameter:
For safety reasons, it is very important that the diameter of the blade is adapted to your cutting requirements and the specific RPM (speed) of the blade and saw. This means that the diameter of the saw blade you choose must not exceed the maximum diameter designed for the saw blade. When choosing a blade, be sure to carefully read the size of the label and check the requirements of the power tool. The diameter of the saw blade is usually printed on the surface of the circular saw blade, as well as the size of the mandrel hole, the number of teeth, and the cut (thickness of the saw blade cutting)
A number of teeth:
TLDR; more teeth: smoother, finer cuts. Fewer teeth: faster and rougher cuts.
The correct number of teeth is very important to ensure that you achieve a smooth cut, optimal chip evacuation, and as little friction as possible when sawing. The correct number of teeth will also reduce the pressure on your equipment, thereby extending the life of the saw.
The size of the teeth:
Blades with larger pitches and larger pitches are ideal for tearing cuts (cutting in woodworking to cut a piece of wood parallel to the grain). This is because the large space between the teeth (esophagus) allows the sawdust to be expelled quickly. On the other hand, smaller teeth can achieve a better finish, so they are ideal for cross-cutting (cutting the texture of wood or materials).