Osg 402-4375-BN11 Ball End Mill 0.4375 in 2 Flute Carbide

Product Description

The OSG 402-4375-BN11 is a solid carbide ball end mill designed for high-performance milling in demanding machining environments. Part of the OSG 402BN series, it features a 0.4375 inch (7/16 inch) mill diameter, a 1 inch length of cut, and a 2-flute helical configuration with a 30-degree helix angle. The TiAlN PVD coating improves heat resistance and tool life during aggressive cuts. At 2.75 inches overall length with a straight-cylindrical shank, this end mill suits both roughing and finishing operations. Machinists and tool-and-die professionals install this type of cutter in CNC machining centers and manual mills across production and job-shop environments.

This ball end mill is suited for use on a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. The single-end, right-hand cutting and right-hand flute direction make it compatible with standard spindle configurations. It is a practical choice for contour milling, profiling, and slotting operations where a ball nose profile is required. The 402BN series is positioned as an economical solid carbide option that maintains consistent tolerancing across production runs.

Key Features

• 0.4375 inch mill diameter with a plus 0.0000 / minus 0.0020 inch diameter tolerance
• TiAlN PVD coating for elevated heat resistance and extended tool life
• 2-flute helical geometry with a 30-degree medium helix angle for chip evacuation
• 1 inch length of cut and 0.2188 inch nose radius for ball-profile contouring
• Single-end, right-hand cutting direction with straight-cylindrical shank
• Rated for roughing and finishing across steel, cast iron, superalloys, and hard materials

Compatibility

Designed for use on steel (P), stainless steel (M), cast iron (K), non-ferrous metals (N), superalloys and titanium (S), and hard materials (H) as defined by ISO workpiece material codes. Suitable for standard CNC and manual milling setups with right-hand spindle rotation and a 7/16 inch collet or tool holder.

Installation Notes

This end mill is installed by machinists in CNC machining centers or manual knee mills using a compatible collet, shrink-fit holder, or hydraulic chuck sized for a 7/16 inch shank. Ensure the spindle and machine are fully stopped and locked out before changing tooling. Verify runout at setup to stay within the specified diameter tolerance. Follow the machine manufacturer and tooling guidelines for feeds, speeds, and depth of cut appropriate to the workpiece material.