Accupro 12180998 Corner Radius End Mill 1 in 5 Flute

Product Description

The ACCUPRO 12180998 is a solid carbide corner radius end mill designed for high-performance milling in ferrous and hardened materials. It features a 1-inch cutting diameter, a 0.06-inch corner radius, and 5 flutes with a right-hand spiral and right-hand cutting direction. The 40-degree helix angle promotes efficient chip evacuation and smooth surface finishes. The AlTiN coating provides thermal resistance and extended tool life in dry or high-speed cutting conditions. This is a single-end, centercutting tool, meaning it can be used for plunge cuts as well as peripheral milling. It is intended for use by experienced machinists and toolroom professionals.

This end mill suits production and job-shop environments where corner-radius geometry is required to reduce stress concentrations and produce blended floor-to-wall transitions. The 1-3/4-inch length of cut (1.125 inches decimal) and 4-inch overall length make it appropriate for moderate-depth pockets, slots, and profiling operations on vertical mills and CNC machining centers. The micrograin carbide substrate supports rigidity and edge retention at elevated cutting speeds. Variable index flute spacing helps reduce harmonic chatter during extended cuts.

Key Features

• 0.06-inch corner radius reduces stress risers and improves workpiece surface finish at floor-to-wall junctions
• AlTiN coating provides oxidation resistance and thermal hardness for dry and high-speed milling
• 5-flute variable-index design reduces chatter and improves feed rate capability
• 40-degree helix angle promotes smooth chip flow and efficient cutting action
• Centercutting geometry allows direct plunge entry without pre-drilling
• Micrograin solid carbide substrate delivers rigidity and edge retention in demanding materials

Compatibility

Designed as an OEM-style solid carbide corner radius end mill for use in standard 1-inch collet or end-mill-holder tooling on CNC machining centers and manual vertical mills.

Installation Notes

Installation should be performed by a qualified machinist. Secure the 1-inch shank in a properly sized collet, shrink-fit holder, or set-screw end mill holder, ensuring full shank engagement to the recommended grip depth. Confirm runout with a dial indicator before beginning a cut. Do not exceed the recommended length-of-cut depth per pass without verifying workpiece fixturing rigidity and spindle horsepower.