Osg 424-0312-BN11 Ball End Mill 4FL Tialn Carbide Stub

Product Description

The OSG 424-0312-BN11 is a solid carbide ball end mill from OSG's 424BN series, designed for precision milling in demanding metalworking applications. Measuring 0.0313 inches in mill diameter with a 1/8-inch straight-cylindrical shank, this stub-length tool delivers tight tolerances in confined cutting environments. The four-flute, right-hand helical configuration with a TiAlN (titanium aluminum nitride) PVD coating resists heat and wear, making it well-suited for high-speed cutting across a broad range of workpiece materials. With an overall length of 1.5 inches and a reach length of 0.0781 inches, the 424-0312-BN11 is built for accurate roughing and finishing work where tool rigidity is critical.

This end mill is suited for machining steel, stainless steel, cast iron, non-ferrous metals, and hard materials, covering ISO material groups P, M, K, N, and H. The stub length design reduces deflection during aggressive cuts, making it a reliable choice for CNC machining centers and manual mills where small-diameter, high-precision toolpaths are required. Its double-end configuration and consistent OSG tolerancing make it a practical option for production environments focused on part accuracy and tool life.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• TiAlN PVD coating improves heat resistance and extends tool life at elevated cutting speeds
• Four-flute, right-hand helical design with 30-degree helix angle for smooth chip evacuation
• Stub length reduces overhang and minimizes deflection for precise small-diameter cuts
• Double-end design provides two usable cutting ends per tool
• Mill diameter tolerance of +0.0000/-0.0020 inches ensures consistent, repeatable results

Compatibility

Designed as an OEM-style solid carbide ball end mill for use in CNC machining centers and compatible manual milling setups accepting a 1/8-inch straight-cylindrical shank.

Installation Notes

Installation and tool changes should be performed by a qualified machinist following the machine tool manufacturer's guidelines. Ensure the spindle is fully powered down and at rest before changing tooling. Use a proper collet or end mill holder rated for the 1/8-inch shank diameter to ensure secure seating and minimize runout. Verify tool projection and reach prior to running the first pass, especially given the small mill diameter.