Osg HP441-1250 Square End Mill 1/8 in 4 Flute Tialn Carbide

Product Description

The OSG HP441-1250 is a 4-flute solid carbide square end mill designed for high-performance milling in ferrous and non-ferrous materials. It measures 1/8 inch in diameter with a 1/2-inch length of cut and a 1-1/2-inch overall length. The micrograin carbide substrate provides hardness and wear resistance, while the TiAlN coating extends tool life under elevated cutting temperatures. The 35-degree right-hand spiral helix promotes efficient chip evacuation and stable cutting. This tool is used by machinists and tool-and-die professionals in CNC machining centers and manual mills where tight-tolerance work in small-diameter applications is required.

The HP441-1250 is suited for slotting, profiling, and peripheral milling operations in precision machining environments. Its regular length configuration and 1/8-inch shank diameter make it well-matched for use in small-bore work, mold detail work, and finishing passes where a compact, rigid tooling setup is needed. The centercutting geometry allows plunge entry, adding flexibility across milling operations without the need for a pre-drilled start hole.

Key Features

• 1/8-inch mill diameter with matching 1/8-inch shank diameter for direct collet chuck mounting
• 4-flute spiral geometry with 35-degree right-hand helix for efficient chip evacuation
• TiAlN coating for extended tool life at elevated cutting temperatures
• Micrograin solid carbide substrate for hardness and dimensional stability
• Centercutting design allows plunge milling without a pre-drilled entry point
• Single-end, regular-length configuration suited for precision detail and finishing work

Compatibility

Part of the OSG HP441 series. Designed for use in CNC machining centers and manual mills accepting 1/8-inch shank tooling via ER collet, end mill holder, or equivalent workholding.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle and workholding are fully stopped and de-energized before changing tooling. Seat the shank fully into the collet or holder and torque the retaining nut to the workholding manufacturer's specification. Confirm runout with a dial indicator before beginning a cut, particularly important at this diameter where deflection affects dimensional accuracy.