Osg 20555003 Corner Radius End Mill 1/2 in 5 Flute Carbide

Product Description

The OSG 20555003 is a solid carbide corner radius end mill engineered for high-performance material removal in demanding machining applications. Built on OSG Series 2055, it features a 1/2 inch cutting diameter, a 0.0600 inch corner radius, and five flutes with a variable index and variable helix geometry. The EXO PVD coating provides enhanced wear resistance and thermal stability at the cutting edge. At 3 inches overall length with a 1 inch length of cut, this single-end, centercutting tool handles both roughing and finishing passes. It is installed by machinists and toolroom professionals in CNC machining centers and milling setups.

This end mill is designed for use in stainless steel, superalloys, titanium, and hard materials — workpiece material codes M, S, and H. The variable helix and variable index flute geometry help suppress chatter and improve surface finish on difficult-to-machine alloys. The right-hand flute direction and right-hand cutting action are standard for conventional CNC milling setups. The Weldon flat shank provides positive drive engagement in compatible toolholders, reducing pull-out risk under heavy lateral loads typical in aggressive stainless and titanium cuts.

Key Features

• 0.0600 inch corner radius reduces stress concentration and extends edge life in hard material applications
• Five-flute variable index and variable helix design suppresses vibration and chatter during cuts
• EXO PVD coating delivers superior hardness and oxidation resistance for stainless steel and superalloy machining
• Centercutting geometry allows plunge entry without a pre-drilled pilot hole
• Weldon flat shank provides secure, positive drive in standard toolholders
• Ultra fine micrograin solid carbide substrate supports sharp edges and long tool life in high-hardness materials

Compatibility

Compatible with standard toolholders accepting a 1/2 inch Weldon flat shank. Suited for CNC machining centers cutting stainless steel, superalloys, titanium, and hard materials (material codes M, S, H).

Installation Notes

Install and remove this end mill with the machine spindle fully powered down and locked out per facility lockout/tagout procedures. Seat the Weldon flat shank fully into the toolholder bore before tightening set screws to the toolholder manufacturer specification. Inspect the cutting edges and corner radius for chips or wear before each use — carbide is brittle and a damaged edge should not be run at full parameters. Confirm correct spindle direction (right-hand) before initiating a cut.