Accupro 311574 Corner Radius End Mill 3/8 in 5 Flute

Product Description

The ACCUPRO 311574 is a solid carbide corner radius end mill designed for precision milling operations requiring a radiused corner profile. Built from micrograin solid carbide and coated with AlCrTiN for extended tool life at elevated temperatures, this single-end mill features a 0.090-inch corner radius and a 38-degree helix angle. It is centercutting, allowing direct plunge entry into workpieces. With 5 flutes and a variable index design, it reduces harmonic vibration during aggressive cuts. This tool is installed by machinists and CNC operators in production and job-shop environments.

The 311574 is suited for high-speed finishing and semi-finishing passes on ferrous and hardened materials where corner integrity and surface finish are critical. The AlCrTiN coating performs well in dry and semi-dry cutting conditions. With a 3/8-inch diameter, 1-1/4-inch length of cut, and 3-inch overall length, it fits standard 3/8-inch toolholders and collet chucks commonly used on vertical machining centers and CNC mills.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance
• AlCrTiN coating extends tool life in high-temperature cutting applications
• 0.090-inch corner radius reduces stress concentration at workpiece edges
• 5-flute variable index design dampens vibration for improved surface finish
• Centercutting geometry allows direct plunge milling
• Right-hand cut, right-hand spiral flute configuration

Compatibility

Designed for use in standard 3/8-inch diameter toolholders and collet systems on CNC vertical machining centers and milling machines requiring a single-end corner radius end mill with a 3/8-inch shank.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The tool should be seated fully in a clean, burr-free collet or end mill holder and torqued to the toolholder manufacturer's specification. Verify runout with a dial indicator before commencing cuts. Inspect the corner radius and cutting edges for chips or wear at regular intervals, as micrograin carbide is brittle under impact loading from interrupted cuts.