Osg HP421-1968-BN Ball End Mill 0.1969 in 2 Flute Carbide

Product Description

The OSG HP421-1968-BN is a solid carbide ball end mill engineered for high-performance metal removal in demanding machining applications. Part of the OSG Hy-Pro-Carb HP421BN series, it features a 0.1969-inch (5 mm) mill diameter, a 2-flute helical design with a 35-degree helix angle, and a TiAlN PVD coating applied over a submicron carbide grade. The coating extends tool life by resisting heat and wear at elevated cutting speeds. With a 0.6299-inch (16 mm) length of cut and single-end geometry, this tool is suited for both roughing and finishing passes in a single setup. Licensed machinists and CNC operators install this tool in vertical or horizontal machining centers.

This ball end mill is designed for use across a wide range of workpiece materials, including steel, stainless steel, cast iron, superalloys, titanium, and hard materials (ISO material groups P, M, K, S, and H). The straight-cylindrical shank with h6 tolerance ensures secure, accurate toolholder engagement. Its standard length profile and compact 51 mm (approximately 2.008 inches) overall length make it well suited for close-tolerance cavity, profile, and contour milling where rigidity and surface finish control are critical.

Key Features

• Solid submicron carbide substrate for superior wear resistance and edge retention
• TiAlN PVD coating extends tool life in high-temperature cutting conditions
• 35-degree medium helix angle balances chip evacuation and cutting stability
• 2-flute ball nose geometry supports both roughing and finishing in a single tool
• Right-hand cut, right-hand flute, single-end configuration
• Straight-cylindrical shank with h6 shank diameter tolerance for precise toolholder fit

Compatibility

Rated for cutting steel, stainless steel, cast iron, superalloys, titanium, and hard materials (ISO groups P, M, K, S, H). Fits standard toolholders accepting a 5 mm straight-cylindrical shank with h6 tolerance.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the spindle before changing tooling. Seat the shank fully in a collet or end mill holder rated for the shank diameter and torque the retention mechanism to the toolholder specification. Verify runout with an indicator before commencing a cut, as excessive runout accelerates edge wear and reduces surface finish quality on ball-nose tools.