Osg 5667400 Square End Mill 3/32 in 4 Flute Cobalt

Product Description

The OSG 5667400 is a cobalt square end mill designed for milling operations in ferrous and difficult-to-machine materials. Built to Series 566 specifications, this double-end stub-length tool features a 3/32 inch (0.0938 inch) cutting diameter, a 9/64 inch (0.1406 inch) length of cut, and a 3/16 inch (0.1875 inch) shank diameter. The 4-flute geometry with a 30-degree spiral helix promotes efficient chip evacuation and smooth surface finish. Manufactured from M42 cobalt high-speed steel, the tool delivers heat and wear resistance suitable for production environments. Licensed machinists and toolroom professionals install this end mill in CNC machining centers and manual knee mills.

This end mill is suited for slotting, profiling, and peripheral milling in stub-reach applications where rigidity is a priority. The double-end configuration provides two cutting ends per tool, extending usable tool life. Its centercutting design allows direct plunge entry without a pre-drilled pilot hole. The uncoated cobalt construction makes it a practical choice for shops that re-sharpen tooling in-house. With a 2 inch overall length, it fits standard ER collet chucks and end mill holders used in both light-duty and production milling setups.

Key Features

• Double-end design provides two usable cutting ends per tool
• M42 cobalt steel construction for heat resistance and edge retention
• 4-flute spiral geometry with 30-degree helix angle for smooth chip flow
• Centercutting capability allows direct plunge milling
• Right-hand cut and right-hand flute configuration for standard spindle use
• Stub length (Series 566) maximizes rigidity in tight-reach applications

Compatibility

Designed as an OEM-style replacement and standard production end mill for use in CNC machining centers, manual mills, and toolroom equipment accepting a 3/16 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or toolroom professional. Secure the shank fully in a properly sized collet or end mill holder and torque the retention mechanism per machine manufacturer specifications. Verify spindle runout before cutting to protect both the tool and the workpiece. Never exceed the recommended depth of cut or feed rate for the workpiece material and machine rigidity class.