Promax 101-01614 Corner Radius End Mill 1/4 in 4 Flute Carbide

Product Description

The PROMAX 101-01614 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous metals. It features a 1/4 inch cutting diameter, a 3/4 inch length of cut (LOC), and a corner radius range of 0.04 to 0.05 inches, which reduces stress concentration at cutting edges and extends tool life in aggressive material removal. The 4-flute configuration paired with a 40-degree high helix angle promotes efficient chip evacuation and smooth surface finishes. An AlTiN coating provides thermal resistance and hardness at elevated cutting temperatures, making this end mill well suited for high-speed, dry, or semi-dry machining environments.

This end mill is intended for use in CNC machining centers and manual knee mills where corner radius geometry is required to meet part print tolerances or to strengthen a tool path transition. It is centercutting, allowing direct plunge entry into workpiece material without a pre-drilled pilot hole. Typical applications include slot milling, profile milling, and pocket milling in tool steels, alloy steels, stainless steels, and hardened materials. The 1/4 inch shank diameter fits standard ER or end mill holders commonly found in production and job shop environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN coating provides elevated heat resistance for dry and high-speed cutting
• Corner radius of 0.04 to 0.05 inches reduces edge chipping and part stress risers
• 40-degree high helix angle promotes chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge without a pre-drilled hole
• Fine pitch, right-hand cut, right-hand flute configuration for standard CNC toolpath compatibility

Compatibility

Designed as an OEM-style replacement or direct application end mill for CNC machining centers and manual mills accepting a 1/4 inch shank end mill holder.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and locked out per applicable shop safety procedures. Secure the 1/4 inch shank in a properly sized end mill holder or collet chuck, ensuring the shank is inserted to the full recommended engagement depth. Verify runout with a dial indicator before starting the cut, as excessive runout accelerates wear and degrades surface finish. Follow the tooling manufacturer and machine builder recommendations for speeds, feeds, and depth of cut appropriate to the workpiece material.