Osg 4400300 Ball End Mill 0.5in 4 Flute Cobalt Long

Product Description

The OSG 4400300 is a cobalt ball end mill designed for milling operations requiring a full-radius cutting profile. With a 0.5 inch cutting diameter, 2 inch length of cut, and 4 inch overall length, this tool is built for long-reach slotting, profiling, and contouring in ferrous and non-ferrous materials. The 4-flute, right-hand cutting geometry provides a balance of chip evacuation and surface finish quality. The uncoated cobalt construction offers good toughness and heat resistance without a coating, making it suitable for regrinding. Single-end configuration is standard for this series.

This ball end mill is suited for job shop and production machining environments where long-length reach is needed in vertical or horizontal machining centers and CNC knee mills. The Series 440 long-length designation means the tool can access deeper cavities and pockets compared to standard-length end mills. It is typically used by machinists working with molds, dies, and complex 3D contoured workpieces. Coarse pitch spacing and a 30-degree helix angle support stable cutting across a range of materials.

Key Features

• 0.5 inch cutting diameter with full ball-end radius for 3D contouring
• 4 flutes with right-hand cutting and right-hand flute direction
• 2 inch length of cut for extended reach into deep pockets
• Cobalt construction for improved heat and wear resistance versus high-speed steel
• Uncoated finish suitable for regrinding and general-purpose use
• Series 440 long-length designation with coarse pitch geometry

Compatibility

Designed as an OEM-style replacement or direct-use tool for standard 1/2 inch shank tool holders, collet chucks, and end mill holders used in CNC machining centers and manual mills.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Verify the 0.5 inch shank seats fully and evenly in the tool holder and that set screws or collet nuts are torqued to the tool holder manufacturer specification. Confirm runout with a dial indicator before beginning a cut to protect both the tool and the workpiece.