Osg HP441-3937 Square End Mill 10mm 4 Flute Solid Carbide

Product Description

The OSG HP441-3937 is a 4-flute solid carbide square end mill designed for high-performance milling in ferrous and non-ferrous materials. It carries a TiAlN coating that improves heat resistance and extends tool life in demanding cutting conditions. The cutting diameter is 10 mm (0.3937 inches), the length of cut is 25 mm (0.9843 inches), and the overall length is 70 mm. The 10 mm shank diameter matches the cutting diameter, making it compatible with standard collet and end mill holders of that bore size. A 35-degree helix angle promotes smooth chip evacuation and reduces cutting forces. This tool is installed by machinists and CNC operators in job shop, production, and toolroom environments.

The HP441-3937 is suited for finishing and semi-finishing operations on milling machines and machining centers. Its regular-length geometry and right-hand cut with right-hand flute spiral make it a general-purpose choice for slotting, profiling, and peripheral milling. The micrograin carbide substrate provides the hardness and rigidity needed for close-tolerance work in steel, stainless, cast iron, and similar materials. Single-end design means the tool is replaced rather than reindexed when the cutting edge wears.

Key Features

• 10 mm cutting diameter with matching 10 mm shank for direct collet mounting
• TiAlN coating for elevated heat resistance and extended tool life
• 4 flutes with 35-degree right-hand helix for efficient chip evacuation
• Micrograin solid carbide substrate for rigidity and wear resistance
• Center-cutting capable, allowing plunge entry into the workpiece
• Regular-length classification suitable for standard-depth milling applications

Compatibility

Designed as an OEM-style replacement or direct-use end mill compatible with standard ER collets, shrink-fit holders, and end mill holders bored to 10 mm shank diameter on CNC and manual milling machines.

Installation Notes

Installation is performed by a machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully in the holder and torque the collet nut or set screw to the holder manufacturer's specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates edge wear and reduces surface finish quality.