Which of the following angles would impact how efficient a saw blade is in cutting?

The tooth rake angle significantly impacts the efficiency of a saw blade during cutting. This angle is the angle between the cutting edge of the tooth and an imaginary line that is perpendicular to the blade's surface. A positive rake angle means the cutting edge is tilted forward, which helps in efficiently removing material by creating a sharper and more aggressive cutting action. This leads to better chip flow and less drag on the blade, resulting in quicker cuts and reduced wear.

Having the right rake angle can enhance the blade's performance in terms of speed and smoothness of the cut. If the tooth rake angle is incorrect, it can lead to increased friction, heat generation, and resistance while cutting, which can cause premature wear or damage to the blade and affect the overall quality of the cut.

In contrast, the tooth set angle, tooth pitch angle, and tooth back angle also play roles in cutting efficiency but are not as directly related to the cutting action itself as the tooth rake angle. The tooth set angle refers to how much the teeth are positioned away from the blade body, affecting the kerf width, while the tooth pitch angle relates to the spacing between the teeth. The tooth back angle involves the geometry of the tooth's back and primarily contributes to the blade's durability