Osg 8556300 Corner Radius End Mill 12 Mm 4 Flute Carbide

Product Description

The OSG 8556300 is a solid carbide corner radius end mill designed for high-performance milling across a wide range of workpiece materials. Built to Series 8215 specifications, it features a 12 mm cutting diameter, a 2 mm corner radius, and a 26 mm length of cut. The variable helix geometry reduces harmonic vibration during cutting, supporting both roughing and finishing operations in a single tool. A Duarise PVD coating provides thermal and wear resistance, extending tool life in demanding applications. The straight-cylindrical shank measures 12 mm in diameter with an h6 tolerance, ensuring accurate fitment in standard toolholders. Installed by machinists and tool-and-die professionals, this end mill suits CNC machining centers and manual mills alike.

The OSG 8556300 is suited for milling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. Its centercutting design allows plunge entry, making it effective for slot milling, profiling, contouring, and pocket milling. The corner radius geometry distributes cutting forces away from sharp corners, reducing edge chipping and improving surface finish in both roughing and finishing passes. This end mill is well-matched to applications where tool life and dimensional consistency across mixed-material workloads are priorities.

Key Features

• 12 mm cutting diameter with 2 mm corner radius and 26 mm length of cut
• Variable helix flute geometry reduces vibration and chatter during aggressive cuts
• Duarise PVD coating for enhanced wear resistance and heat management
• Centercutting design enables direct plunge entry without pre-drilling
• Handles roughing and finishing in a single tool, reducing changeover time
• Right-hand cut and right-hand flute direction for standard CNC toolholder compatibility

Compatibility

Designed for use with standard straight-bore toolholders accepting a 12 mm shank diameter (h6 tolerance). Compatible with CNC machining centers and manual mills configured for right-hand rotation. Suitable for workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials (ISO material codes P, M, K, N, S, H).

Installation Notes

Installation is performed by machinists or toolroom technicians. Ensure the machine spindle is fully stopped and the tool-change cycle is complete before handling. Seat the shank fully into the toolholder and torque the retention mechanism to the toolholder manufacturer's specification. Verify runout at the tool tip before beginning production cuts, as excessive runout accelerates wear on a corner radius end mill and degrades dimensional accuracy.