Osg 5226200 Square End Mill 13/64 in 2 Flute Cobalt

Product Description

The OSG 5226200 is a double-end cobalt square end mill designed for milling ferrous and difficult-to-machine materials in metalworking applications. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention under demanding cutting conditions. The tool features a 13/64 inch (0.2031 inch) milling diameter, a 1/2 inch length of cut, and a 30-degree right-hand helix that promotes efficient chip evacuation. With two flutes and a bright uncoated finish, it suits general-purpose profiling, slotting, and contouring operations where coolant compatibility and surface visibility matter. The double-end design extends tool life by providing two usable cutting ends per shank.

This end mill is intended for use in CNC machining centers, manual knee mills, and tool-and-die operations where precise edge geometry is required. It is well-suited for cutting steel, alloy steel, stainless steel, and similar ferrous metals. The 3/8 inch shank diameter fits standard ER and milling collet systems commonly found in both production and job-shop environments. Center-cutting capability allows plunge entry without a pre-drilled pilot hole, adding versatility across milling routines.

Key Features

• M42 cobalt HSS construction provides superior heat and wear resistance compared to standard M2 HSS tooling
• Double-end design offers two cutting ends per tool, extending usable tool life
• 30-degree right-hand spiral helix promotes smooth chip flow and reduces cutting forces
• Center-cutting geometry allows direct plunge milling without a pilot hole
• Bright uncoated finish is compatible with a wide range of cutting fluids and lubricants
• Regular-length profile suits standard reach applications without sacrificing rigidity

Compatibility

Designed as an OEM-style replacement or direct-use cutting tool for 3/8 inch collet and milling chuck systems; part of the OSG Series 522 double-end cobalt end mill line.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the 3/8 inch shank fully into the collet or chuck and tighten to the tool holder manufacturer's specified torque range. Verify runout with a dial indicator before beginning a cut, and confirm proper cutting fluid flow if machining hardened or stainless steel grades.