Osg HP441-6250 Square End Mill 5/8 in 4 Flute Solid Carbide

Product Description

The OSG HP441-6250 is a solid carbide square end mill designed for high-performance milling in demanding machining environments. With a 5/8-inch cutting diameter, 1-1/4-inch length of cut, and 4 spiral flutes ground from micrograin carbide, this tool delivers precise material removal and consistent edge integrity across a wide range of workpiece materials. The TiAlN (Titanium Aluminum Nitride) coating provides elevated heat resistance and extended tool life at higher cutting speeds. At 3-1/2 inches overall length with a 5/8-inch shank diameter, it fits standard milling chucks and collet systems commonly used in CNC machining centers and manual knee mills.

This end mill is suited for slotting, profiling, and peripheral milling operations in ferrous and non-ferrous materials. The 35-degree helix angle promotes smooth chip evacuation and reduces cutting forces, making it effective in both roughing and finishing passes. The centercutting geometry allows plunge entry without a pre-drilled pilot hole. It is used by machinists in job shops, tool rooms, and production machining environments where consistent dimensional tolerances are required.

Key Features

• 5/8-inch cutting diameter with 1-1/4-inch length of cut for standard slot and profile work
• Solid micrograin carbide construction for rigidity and wear resistance
• TiAlN coating for improved heat resistance and extended tool life at elevated cutting speeds
• 35-degree helix angle promotes efficient chip evacuation and reduced cutting forces
• Centercutting design allows direct plunge entry without a pilot hole
• Right-hand cut, right-hand flute spiral geometry compatible with standard CNC spindle rotation

Compatibility

Designed for use with standard 5/8-inch collets, end mill holders, and milling chucks on CNC machining centers and manual milling machines. Part of the OSG HP441 series.

Installation Notes

Installation should be performed by a qualified machinist following standard toolholding practices. Ensure the spindle is fully stopped and locked before inserting or removing the end mill from the holder. Seat the shank to the full recommended insertion depth in the collet or holder to prevent pullout under load. Verify runout with a dial indicator before production cuts when tight tolerances are required.