Promax 129-86414 Corner Radius End Mill 1 in 4 Flute

Product Description

The PROMAX 129-86414 is a solid carbide corner radius end mill designed for high-performance milling of ferrous and hardened materials. Built on PROMAX Series 129, it features a 1 inch cutting diameter, 1-3/4 inch length of cut, and a 1/8 inch corner radius that reduces stress concentration at the cutting edge and extends tool life. The AlTiN coating provides excellent heat resistance and lubricity at elevated cutting temperatures. With a 40-degree helix angle and right-hand spiral flute geometry, this tool delivers efficient chip evacuation and smooth surface finishes in demanding machining operations. Micrograin carbide construction ensures edge retention under high feeds and speeds.

This end mill is suited for milling operations on steel, stainless steel, cast iron, and high-temperature alloys in CNC machining centers and manual mills. Typical applications include profiling, slotting, and contouring where a radiused corner is required to reduce part stress risers or meet print-specified edge break requirements. The single-end configuration and 1 inch shank diameter make it a direct fit for standard ER or side-lock toolholders used in production and job-shop environments.

Key Features

• 1/8 inch corner radius reduces edge chipping and part stress concentration
• AlTiN coating delivers thermal resistance for dry and high-speed cutting
• 40-degree helix angle promotes efficient chip evacuation and reduced cutting forces
• Micrograin solid carbide substrate provides rigidity and edge retention
• Right-hand cut and right-hand flute direction compatible with standard CNC spindle rotation
• Single-end design with 4 inch overall length for reach in deeper setups

Compatibility

Designed as an OEM-style replacement and standard-production corner radius end mill for CNC machining centers and milling machines accepting a 1 inch shank diameter toolholder.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool changer or quill is locked before inserting or removing the tool. Seat the shank fully and evenly in the toolholder to the recommended gauge length and torque the retention mechanism per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning a cutting pass, as excessive runout accelerates wear and degrades surface finish.