Promax US556134 Corner Radius End Mill 1/2 Inch 5 Flute

Product Description

The PROMAX US556134 is a solid carbide corner radius end mill engineered for demanding metal removal in steel, stainless steel, cast iron, superalloys, and titanium. It carries a 1/2-inch mill diameter, a 1-1/4-inch length of cut, and a 0.030-inch corner radius that reduces stress concentration at the cutting edge. The PowerLayer coating improves wear resistance and thermal performance during both roughing and finishing passes. Five flutes with a high helix, right-hand spiral geometry promote efficient chip evacuation and smooth surface finish. This tool is suited for machinists and toolroom professionals running CNC machining centers and manual mills.

The US556134 is designed for use in production and toolroom environments where a single end mill must handle both stock removal and finish passes on hard ferrous and exotic materials. The centercutting geometry allows plunge entry, and the straight cylindrical shank is compatible with standard collet-style and milling toolholders. With a 3-inch overall length and standard length classification, it fits most vertical and horizontal machining center setups without extended-reach concerns.

Key Features

• Solid micrograin carbide substrate for rigidity and edge retention in ferrous and superalloy materials
• PowerLayer coating enhances heat and wear resistance for extended tool life
• Five-flute, high-helix right-hand spiral for efficient chip evacuation and improved finish
• 0.030-inch corner radius reduces edge chipping and improves corner durability
• Centercutting design permits direct plunge entry without a pre-drilled pilot hole
• Capable of both roughing and finishing material removal in a single tool

Compatibility

Designed for use with standard collet-style milling toolholders accepting a 1/2-inch straight cylindrical shank. Primary workpiece materials are steel, stainless steel, cast iron, superalloys, and titanium.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is in an e-stop or lockout state before changing tooling. Seat the shank fully in the toolholder to the recommended gauge depth and torque the collet nut per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning cuts, as excessive runout accelerates wear and can cause premature tool breakage.