Osg 20556252 Corner Radius End Mill 5/8 in 5 Flute Carbide

Product Description

The OSG 20556252 is a solid carbide corner radius end mill engineered for high-performance material removal in stainless steel, superalloys, and titanium. With a 5/8 inch cutting diameter, a 0.06 inch corner radius, and five flutes in a variable helix configuration, this tool balances chip evacuation with surface finish quality across both roughing and finishing operations. The EXO PVD coating — a TiAlN-based finish applied by physical vapor deposition — provides thermal resistance and edge hardness at elevated cutting temperatures. Single-end geometry and a Weldon flat shank make it straightforward to set up in a standard toolholder.

This end mill is intended for use in CNC machining centers handling difficult-to-cut workpiece materials including stainless steel, nickel-based superalloys, titanium, and other hard materials. The variable helix angle reduces harmonic vibration during long cuts, making it well suited for aerospace, medical, and precision manufacturing applications where tool life and dimensional control in tough alloys are critical requirements. It is a single-end tool classified under OSG Series 2055, designed as a regular-length end mill for toolholder mounting.

Key Features

• 0.06 inch corner radius protects the cutting edge and improves fatigue resistance in finished workpiece corners
• Variable helix and variable index geometry dampen vibration for more stable cuts in difficult materials
• EXO PVD TiAlN coating delivers elevated thermal and wear resistance for stainless steel and superalloy applications
• Ultra fine micrograin solid carbide substrate for superior edge integrity at high cutting speeds
• Center-cutting capable with right-hand flute direction and right-hand cutting for standard CNC setups
• Weldon flat shank prevents axial pullout in heavy-engagement milling passes

Compatibility

Designed for use with standard toolholders accepting a 5/8 inch Weldon flat shank. Primary workpiece materials are stainless steel, superalloys, titanium, and hard materials (ISO material codes M, S, and H). Part of OSG Series 2055.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the toolholder. Verify Weldon flat alignment with the toolholder setscrew before tightening to prevent radial slippage. Confirm runout with a dial indicator after setup, as excessive runout accelerates edge wear in hard-material applications.