What is the tooth form characterized by evenly spaced teeth, wide gullets, and a positive rake angle called?

The tooth form characterized by evenly spaced teeth, wide gullets, and a positive rake angle is known as the hook tooth form. This design is especially advantageous for cutting various materials, as the positive rake angle improves cutting efficiency and decreases the effort required for the cutting process. The evenly spaced teeth help ensure a consistent feed while the wide gullets facilitate better chip removal, reducing the chances of clogging and improving overall cutting performance.

In contrast, the flat tooth form features teeth that are straight and provide a flat cutting edge, which may not be as effective for certain applications compared to the hook design. The variable pitch tooth form has teeth that are spaced unevenly, which can help reduce vibration but does not offer the same cutting advantages as the hook tooth form. Lastly, the round tooth form is usually not associated with efficient cutting in the same way, as it lacks the sharp cutting edges and the necessary clearance for chip removal found in hook tooth forms.