Promax US556135 Corner Radius End Mill 1/2 in 5 Flute

Product Description

The PROMAX US556135 is a 5-flute solid carbide corner radius end mill engineered for high-performance milling in demanding materials. Sized at 0.5 inches in diameter with a 1.25-inch length of cut and a 3-inch overall length, this tool carries a 0.060-inch corner radius and a 38-degree high-helix geometry. The PowerLayer coating extends tool life across aggressive roughing and finishing operations. It is a single-end, centercutting design with right-hand flute direction and right-hand cutting direction, suitable for use with standard straight-cylindrical toolholders. Machinists and CNC operators working in job shop, aerospace, and production environments are the primary users.

The US556135 is designed for milling steel, stainless steel, cast iron, superalloys, and titanium. Its short-length geometry and normal pitch make it well suited for general-purpose pocketing, profiling, and slotting where rigidity is a priority. The corner radius reduces edge chipping and improves surface finish at part corners, which makes it a practical choice for finishing passes on hardened or abrasive workpiece materials without sacrificing material removal rate on roughing passes.

Key Features

• 5-flute solid carbide construction in micrograin grade for rigidity and edge retention
• PowerLayer proprietary coating for extended tool life in steel, stainless steel, cast iron, superalloys, and titanium
• 0.060-inch corner radius with a tolerance of plus or minus 0.0010 inches to protect cutting edges and improve surface finish
• 38-degree high-helix angle promotes smooth chip evacuation and reduces cutting forces
• Centercutting design allows plunge entry without a pre-drilled hole
• Compatible with roughing and finishing operations in a single tool

Compatibility

Designed for use with standard straight-cylindrical toolholders. Primary workpiece materials include steel, stainless steel, cast iron, superalloys, and titanium (ISO material codes P, M, K, S).

Installation Notes

Installation is performed by a machinist or CNC setup technician. Secure the 0.5-inch straight-cylindrical shank in a properly sized toolholder and verify runout before cutting. Ensure the machine spindle is fully stopped before tool changes. Follow the tool manufacturer and machine builder guidelines for speed, feed, and depth-of-cut parameters appropriate to the workpiece material and machine rigidity.