Promax 120-01822 Corner Radius End Mill 0.2813in 4 Flute Carbide

Product Description

The PROMAX 120-01822 is a solid carbide corner radius end mill designed for roughing and finishing operations in a single tool. It features a 0.2813-inch mill diameter with a 0.02-inch corner radius at the tip, a 4-flute configuration, and a 40-degree helix angle. The TiCN coating improves wear resistance and tool life in harder workpiece materials. The right-hand cut and right-hand flute direction are standard for conventional CNC milling setups. This tool is installed and operated by machinists and CNC programmers working in job shops, manufacturing facilities, and toolrooms.

This end mill is suited for milling steel, stainless steel, and harder alloys where a corner radius profile reduces edge chipping and stress concentration at the floor-to-wall transition. The stub-length configuration with a 0.5-inch length of cut and 2.5-inch overall length keeps the tool rigid for demanding cuts. The 5/16-inch shank with a Weldon flat accommodates side-lock tool holders, which is common in production environments where pullout resistance is critical.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• TiCN coating for extended tool life and reduced friction at the cutting edge
• 0.02-inch corner radius reduces stress concentration and edge chipping at floor-to-wall transitions
• 40-degree helix angle improves chip evacuation and surface finish
• Weldon flat shank for secure seating in side-lock holders, preventing pullout
• Centercutting design allows plunge entry directly into the workpiece

Compatibility

Designed for use in standard 5/16-inch side-lock or Weldon flat end mill holders on CNC machining centers and manual knee mills. Mill diameter tolerance of +0.000000 to -0.003000 inches and shank diameter tolerance of -0.0001 to -0.0004 inches are consistent with precision toolholding systems.

Installation Notes

Installation is performed by a machinist or CNC setup technician. Confirm the spindle is fully stopped and the machine is in an e-stop or lockout state before changing tooling. Seat the Weldon flat shank fully into the holder and torque the set screw to the tool holder specification. Verify runout with a dial indicator before running at full depth of cut or feed rate.