ACCUCUT I4KES 1/4” Carbide Square End Mill- 4 Flute Milling Bit Set for Steel, Forge Hardened Steel, Copper, Alloys & Materials < HRC 50 - AlTiCrN Coating CNC Router Bit, 45 Degree Helix (5 pcs) — Open-Box, 38% Off

General Usage: Applicable with copper, copper alloys, cast iron, steels, carbon steels, alloy steels, pre-hardened steels, hardened steels, and stainless steel materials. Best use for materials HRC less than 50.

Solide Carbide: The material is European origin ultra fine grain carbide. We use the highest quality tungsten carbide powders and adjust the ratio of tungsten carbide and cobalt to meet the ideal hardness. It is stable and has excellent wear-resistance of the material. It significantly enhances the tool's lifespan and keeps the end mill sharp. It also helps keep the surface quality of your work-piece at the best level possible.

AlTiCrN Coating: Upgrades the traditional AlTiN structure with Chromium to significantly boost toughness and thermal resilience. Under extreme temperatures, it generates a self-protecting Al₂O₃ and Cr₂O₃ shield that insulates the tool substrate from thermal shock. Offering superior heat resistance and a drastically lowered risk of chipping, it guarantees long-term processing stability when tackling stainless steel, tool steel, and nickel-based superalloys in demanding high-feed or interrupted cutting conditions.

4 Flute Cutter: It has uniqe geometry and strong cutting edge. 4 flute is great for speedy cutting. Ideal for planar, step, groove, forming surface while the 45 degree helix design can perform smooth surface finish, better chip removal control than those with lower helix degree.

45° Helix: Specification - 1/4" diameter, 5/8" cutting length, 2" overall length, 1/4" shank, 45 helix degree