03-0670 through 03-0679: These fine-pitch carbide roughing end mills come in two styles: a 30-degree helix, and a 45-degree helix version. Both are designed to cut exotic materials, such as stainless steels, nickel alloys, and titanium.
The Titanium Aluminum Nitride (TiAlN) coating makes them the perfect choice for rough milling applications on all steels up to HRc45, as well as the exotic materials listed above.
The lower helix-angle version has a larger core, to enhance the strength of the cutter to better resist deflection. The higher helix-angle version produces smaller chips due to less engagement length, and therefore can evacuate the chips more efficiently, especially given the lower RPM necessary on the nickel and titanium alloys. The corners also have a reinforced cutting edge, and all sizes are center-cutting.
03-0680 through 03-0684: These fine-pitch carbide roughing end mills feature a 20-degree helix, and a modified Aluminum Chromium Nitride (AlCrN) coating that make them the perfect choice for rough milling applications on pre-hardened steels up to HRc55, mold and die steels, and cast iron.
The low helix angle enhances the strength of the cutter, because the core is larger to better resist deflection. The corners have a 45-degree angle to reinforce the cutting edge, and all sizes are center-cutting.
Recent upgrades include higher-quality raw material, the use of a proprietary advanced honing technology, and a modified Aluminum Chromium Nitride (AlCrN) coating. All together, these upgrades improved wear resistance an average of 67% in testing on HRc35 mold steel.
The aluminum chromium-based coating has very high thermal shock stability and great wear resistance. It remains thermally stable up to 1100 degrees Celsius, so it’s good for wet or dry machining, and excellent in high-speed machining applications.