Accupro 311448 Corner Radius End Mill 1/4 in 5 Flute

Product Description

The ACCUPRO 311448 is a solid carbide corner radius end mill designed for high-performance milling of ferrous and hard materials. It features a 1/4 inch diameter, a 1 inch length of cut, and a 3 inch overall length. The 5-flute, single-end design with a right-hand cut and right-hand spiral flute delivers efficient chip evacuation and smooth surface finishes. An AlCrTiN coating extends tool life in high-heat cutting environments. A 0.010 inch corner radius reduces edge chipping and stress concentration at workpiece corners. The 38-degree helix angle and variable index geometry help reduce chatter. This end mill is installed and used by machinists and toolroom professionals in CNC milling applications.

This end mill is suited for finish and semi-finish milling operations in ferrous alloys, hardened steels, and high-temperature alloys where heat resistance and edge durability are required. The centercutting design allows plunge cutting as well as conventional peripheral and slot milling. The 1/4 inch shank diameter fits standard collet chucks and end mill holders common to vertical machining centers and CNC mills. The Series HS designation indicates a high-speed, micrograin carbide substrate optimized for demanding material removal rates.

Key Features

• AlCrTiN coating for elevated heat and wear resistance in hard-material milling
• 5-flute configuration increases feed rate capability and surface finish quality
• 0.010 inch corner radius reduces stress concentration and edge breakout at part corners
• Variable index flute spacing reduces harmonic chatter during aggressive cuts
• Centercutting geometry allows direct plunge entry without a pilot hole
• Micrograin solid carbide substrate provides rigidity and edge retention

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill for 1/4 inch collet chucks and end mill holders on CNC vertical machining centers and manual knee mills.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and the control in a safe state. Seat the 1/4 inch shank fully into a clean, undamaged collet or end mill holder and torque the retention nut to the tool holder specification. Inspect the cutting edges and coating for chips or damage before each use. Follow your facility's tooling runout and setup standards to maximize tool life and part accuracy.