Accupro 311369 Corner Radius End Mill 1/8 in 5 Flute Carbide

Product Description

The ACCUPRO 311369 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking applications. It features a 1/8-inch diameter, a 3/4-inch length of cut, and a 0.010-inch corner radius that produces controlled edge breaks and smooth floor transitions without secondary deburring. The 5-flute geometry with a 38-degree right-hand helix promotes efficient chip evacuation and higher feed rates compared to standard 4-flute designs. An AlCrTiN coating provides thermal resistance and extended tool life when cutting hardened steels, stainless alloys, and high-temperature materials. The single-end, centercutting configuration supports both plunge and ramp entry. Overall length is 2.5 inches.

This end mill is suited for finish and semi-finish milling in CNC machining centers and high-speed machining environments. The 1/8-inch diameter and 3/4-inch length of cut make it well-matched to small-feature profiling, slotting, and contour work in die and mold applications, aerospace components, and medical parts. The variable index geometry reduces harmonic chatter, making it a practical choice for long-reach operations or thin-wall features. It is installed and run by machinists and CNC operators working in job shop, production, and toolroom settings.

Key Features

• 5-flute solid micrograin carbide construction for rigidity and wear resistance
• AlCrTiN coating for high-heat performance in hardened and abrasive materials
• 0.010-inch corner radius reduces stress concentration and improves surface finish at floor edges
• 38-degree right-hand helix with variable index for chatter reduction and smooth cutting action
• Centercutting design allows direct plunge entry without pre-drilling
• Single-end configuration with 1/8-inch shank diameter for standard collet and end mill holder compatibility

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for CNC machining centers and manual mills accepting a 1/8-inch shank diameter with standard collet or end mill holder tooling.

Installation Notes

Installation is performed by a machinist or CNC operator. Secure the 1/8-inch shank in a properly sized collet or end mill holder and verify runout before cutting. Ensure the spindle and tool holder are clean and free of chips before seating the tool. Follow machine tool manufacturer guidelines for maximum RPM, feed rate, and depth of cut for the workpiece material and tool diameter being used.