What type of angle influences tool wear rates and cutting edge strength?

Relief angles play a critical role in influencing both tool wear rates and the strength of the cutting edge. The relief angle is designed to prevent the tool from rubbing against the workpiece, which can cause friction and accelerate wear. By allowing the cutting edge to engage the material effectively, a proper relief angle minimizes thermal buildup and improves chip removal, which further affects the tool's longevity.

Additionally, the strength of the cutting edge is enhanced by an appropriate relief angle, as it helps to distribute the stresses experienced during cutting more evenly along the geometry of the tool. If the relief angle is not well-defined, it may lead to excessive wear or even chipping of the cutting edge.

Understanding how relief angles impact these factors is vital for optimizing tool performance and extending tool life in machining operations.