Promax 101-02014 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The PROMAX 101-02014 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 5/16-inch diameter with a 3/4-inch length of cut and a corner radius range of 0.04 to 0.05 inches, which reduces stress concentration at the tool corner and extends tool life compared to a sharp-corner end mill. The four-flute, right-hand cutting geometry is combined with an AlTiN coating and a high-helix design to support higher feed rates and improved chip evacuation. This tool is installed and used by machinists and CNC programmers running mills, machining centers, and similar equipment.

This end mill is suited for finish milling, slotting, and profiling passes where a controlled corner radius is required on the finished part. The centercutting capability allows plunge entry, giving the operator flexibility in toolpath strategies without requiring a pre-drilled start hole. With a 2-1/2-inch overall length and a 5/16-inch shank diameter, it fits standard collets and end mill holders commonly found in vertical and horizontal machining center setups. The fine pitch and high-helix geometry make it a practical choice for applications in hardened steels, stainless, and high-temp alloys where the AlTiN coating provides thermal resistance.

Key Features

• Corner radius of 0.04 to 0.05 inches reduces corner chipping and improves surface finish at part edges
• AlTiN coating provides heat and oxidation resistance for cutting harder materials at elevated temperatures
• High-helix, four-flute geometry promotes efficient chip evacuation and smooth cutting action
• Centercutting design allows direct plunge entry without a pilot hole
• Right-hand cut and right-hand flute direction for standard CNC spindle operation
• Solid carbide construction delivers rigidity and dimensional stability throughout the cut

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 5/16-inch collets and end mill holders across vertical machining centers and CNC milling machines accepting a 5/16-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Power down and lock out the spindle before loading or changing the tool. Seat the shank fully in the collet or holder to the recommended gauge line and torque the retention hardware per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning the cut, as excessive runout accelerates wear and degrades surface finish.