Machining And Production Management In A Precision Part Project

How End Mill Helix Angle Impacts Overcutting?

The helix angle of an end mill plays an important role in managing tool vibration and preventing overcutting during machining. Because it greatly influences machining performance.

The influence of the helix angle on the machining effect can be analyzed from several aspects, including the characteristics of the material being cut, cutting resistance, machining accuracy, and tool life.

Material Characteristics

Low-hardness materials: Large-helix-angle tools (e.g., 45° three-flute end mills) are preferred due to their sharper edges and larger rake angles.
High-hardness materials: Small-helix-angle tools are ideal as they offer stronger edge rigidity due to smaller rake angles.