Osg HP441-0984 Square End Mill 0.0984 in 4 Flute Carbide

Product Description

The OSG HP441-0984 is a solid carbide square end mill designed for precision milling operations in demanding shop environments. Part of the HP441 series, it features a 0.0984-inch (2.50 mm) mill diameter, a 0.315-inch length of cut, and four spiral flutes ground from micrograin carbide stock. The TiAlN coating improves heat resistance and tool life in ferrous and hardened materials. At 0.20 pounds, this is a compact, single-end tool suited for close-tolerance finishing and light profiling passes. It is installed and operated by machinists and CNC tooling professionals working on vertical and horizontal machining centers.

The HP441-0984 is sized for small-diameter work where tight radii and fine surface finishes are required. Its 35-degree helix angle promotes efficient chip evacuation and reduces cutting forces during slotting and peripheral milling. The centercutting geometry allows plunge entry, giving the operator flexibility in toolpath programming without requiring a pre-drilled pilot hole. Typical applications include die and mold work, aerospace component finishing, and precision part machining in steel, stainless, and similar alloys.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance in hard materials
• TiAlN finish extends tool life in high-temperature cutting conditions
• 4-flute spiral design with 35-degree helix for effective chip evacuation
• Centercutting capable — supports direct plunge entry without a pilot hole
• Right-hand cut, right-hand flute configuration for standard CNC spindle setups
• Single-end design; 3.00 mm shank diameter for collet or end mill holder mounting

Compatibility

Designed for use in CNC machining centers and manual mills equipped with collets or end mill holders accepting a 3.00 mm shank diameter. Part of the OSG HP441 series, suitable for length-of-cut applications in the 0.300 to 0.500 inch range.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down and lock out the spindle before inserting or removing the tool from the holder. Ensure the collet or holder is clean and free of debris before seating the shank, and verify runout with a dial indicator before beginning a production cut. Do not exceed the manufacturer-recommended depth of cut for the diameter and material being machined.