Osg 5828300 Square End Mill 0.2165 in 2 Flute Cobalt

Product Description

The OSG 5828300 is a cobalt square end mill designed for milling, slotting, and profiling operations on ferrous and non-ferrous materials. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance in demanding cutting conditions. The tool measures 0.2165 inches in cutting diameter with a 1/2-inch length of cut and a 3/8-inch shank diameter, giving machinists a compact, rigid setup for precise work. The 30-degree helix spiral flute geometry promotes efficient chip evacuation. This double-end configuration extends usable tool life, making it a practical choice for production and job-shop environments. Licensed machinists and tool-and-die professionals are the primary users.

The OSG 5828300 suits light-to-medium milling applications in CNC machining centers and manual knee mills. The 0.2165-inch diameter makes it appropriate for small-feature work such as narrow slots, keyways, and contoured profiles. Its centercutting capability allows plunge entry directly into the workpiece without a pre-drilled hole. Right-hand cut and right-hand flute orientation follow standard conventions for most vertical milling setups. The Series 582 designation places this tool within OSGs regular-length cobalt end mill family. Overall length is 3-1/8 inches, providing adequate reach while maintaining stiffness at this diameter.

Key Features

• M42 cobalt HSS construction for elevated heat resistance and extended tool life
• Double-end design provides two usable cutting ends per tool
• Centercutting geometry allows direct plunge milling without pilot drilling
• 30-degree helix spiral flute promotes efficient chip flow and reduces cutting forces
• Uncoated finish suitable for use with conventional cutting fluids on a wide range of materials
• Right-hand cut and right-hand flute match standard spindle rotation on most milling machines

Compatibility

Designed as an OEM-style replacement and standard tooling option for 3/8-inch collet or end-mill holder setups on CNC machining centers and manual vertical mills requiring a 0.2165-inch diameter square end mill.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom procedures. Ensure the machine spindle is fully stopped and locked before inserting or removing the end mill from the holder. Seat the shank to the full recommended engagement depth in the collet or end-mill holder and torque the retention mechanism per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning the cut to avoid premature tool wear or workpiece damage.