English: A Small Corner Radius Can Make a Cutting Edge Stronger
Corner radius end mills are widely used in CNC roughing because the rounded corner spreads cutting stress more evenly than a sharp square corner. This improves edge strength and reduces the risk of chipping, especially in steel, stainless steel, hardened materials and interrupted cuts. For shops trying to improve carbide tool life, switching from a square end mill to a corner radius tool can be a practical first step.
The radius also changes how the tool leaves material in corners and shoulders. Programmers should account for the corner radius in CAM strategy, especially before finishing passes. A larger radius can support heavier roughing, but it may leave more stock in internal corners.
Selection guidance
Choose the radius according to material, rigidity and finishing allowance. If chipping appears near the tool corner, check runout, corner engagement and feed per tooth. Stable roughing depends on both tool geometry and process control.
中文：圆角铣刀如何减少 CNC 粗加工崩刃
圆角铣刀常用于 CNC 粗加工，因为圆角可以让切削应力分布更均匀，比直角刃更不容易崩刃。在钢件、不锈钢、硬化材料和断续切削中，圆角硬质合金铣刀通常能提升刃口强度和刀具寿命。
圆角也会影响角落和台阶处的残留材料。编程时需要在 CAM 策略中考虑刀尖圆角，特别是在精加工前。较大圆角有利于重切削，但内角位置可能留下更多余量。
Français : Fraises à rayon d’angle en ébauche CNC
Une fraise à rayon d’angle répartit mieux les efforts qu’une arête vive. Elle réduit les éclats et améliore la durée de vie de l’outil en ébauche, surtout dans l’acier et les coupes interrompues.
Русский: Концевые фрезы с радиусом угла
Радиус угла повышает прочность режущей кромки и снижает риск сколов при черновой CNC-обработке. Такой инструмент полезен при обработке стали, нержавеющей стали и прерывистом резании.
