Accupro 311398 Corner Radius End Mill 3/16 in 5 Flute

Product Description

The ACCUPRO 311398 is a solid carbide corner radius end mill designed for high-performance milling operations in demanding shop environments. Built on the HS series platform, it features a 3/16 inch diameter, a 5-flute configuration, and an AlCrTiN coating that resists heat and wear during aggressive cuts. The corner radius end geometry reduces stress concentration at the cutting edge, extending tool life in hard materials. With a variable index design and right-hand flute direction, this end mill delivers improved chip evacuation and surface finish consistency. Licensed machinists and CNC operators will find it well suited to precision profiling and contouring work.

This end mill is intended for use in CNC machining centers and manual mills where tight tolerances and fine finishes are required. The 3/4 inch length of cut and 2-1/2 inch overall length make it a practical choice for shallow-to-medium depth profiling passes. The centercutting capability allows plunge entry, adding flexibility to the tool path. It is suited for use in steel, stainless, and other hard materials where an AlCrTiN-coated micrograin carbide tool provides a meaningful advantage over uncoated or HSS alternatives.

Key Features

• AlCrTiN coating provides high-temperature and wear resistance for extended tool life
• 5-flute, single-end corner radius geometry reduces edge chipping and improves surface finish
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Variable index flute spacing reduces harmonic vibration during cutting
• Micrograin solid carbide substrate delivers rigidity and edge retention
• Right-hand cut, right-hand spiral flute direction for standard CNC setups

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill for CNC machining centers and manual mills accepting a 3/16 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician. Ensure the spindle is fully de-energized and the machine is in a locked-out state before changing tooling. Use a properly sized collet or end mill holder matching the 3/16 inch shank diameter and verify runout with a dial indicator before beginning a production cut. Follow the machine manufacturer guidelines and applicable shop safety standards when setting tool length offsets and spindle speeds.