Osg HP441-7874-BN Ball End Mill 4 Flute Solid Carbide

Product Description

The OSG HP441-7874-BN is a solid carbide ball end mill from the HP441BN Hy-Pro-Carb series, engineered for extended tool life in demanding machining environments. It features a 0.7874-inch (20 mm) cutting diameter, a 1.4961-inch (38 mm) length of cut, and four helical flutes at a 35-degree helix angle. The cutting geometry is right-hand with a single-end configuration and a straight-cylindrical shank. A TiAlN (Titanium Aluminum Nitride) PVD coating adds heat and wear resistance, making this tool well-suited for aggressive material removal and finish passes in one tool.

This end mill is designed for use across a broad range of workpiece materials including steel, stainless steel, cast iron, superalloys, titanium, and hard materials. It handles both roughing and finishing operations, making it a versatile choice for tool-and-die shops, aerospace component machining, and general precision machining centers. The submicron carbide grade substrate supports edge integrity at elevated cutting speeds typical in these applications.

Key Features

• Solid carbide submicron-grade substrate for superior edge retention
• TiAlN PVD coating for extended tool life in high-heat cutting conditions
• 4 right-hand helical flutes with 35-degree helix angle for efficient chip evacuation
• Ball nose geometry supports both roughing and finishing in a single tool
• Straight-cylindrical shank with h6 tolerance for consistent runout in standard toolholders
• Compatible with steel, stainless steel, cast iron, superalloys, titanium, and hard materials

Compatibility

Rated for use on workpiece materials coded P (steel), M (stainless steel), K (cast iron), S (superalloys and titanium), and H (hard materials) per ISO material classification. Suitable for CNC machining centers with standard straight-bore toolholders accepting a 20 mm shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe state before tool changes. Use a properly sized collet or toolholder with adequate clamping force to minimize runout; excessive runout accelerates edge wear on carbide tooling. Confirm cutting parameters against the material being machined and the machine spindle rating before operation.