Osg 5201100 Square End Mill 0.5in 2 Flute Cobalt 3in Oal

Product Description

The OSG 5201100 is a cobalt square end mill designed for general-purpose milling in metal-cutting applications. Built from M42 cobalt high-speed steel, it delivers improved heat and wear resistance compared to standard HSS tooling, making it well-suited for cutting harder workpiece materials. The tool features a 0.5 inch cutting diameter, a 1 inch length of cut, and a 3 inch overall length with a 0.5 inch straight shank. Its two-flute, spiral design with a 30-degree helix angle provides efficient chip evacuation and smooth cutting action. The uncoated finish is standard for cobalt tooling intended for regrinding or use with cutting fluids.

This end mill is used in vertical milling machines, knee mills, and CNC machining centers for slotting, profiling, and peripheral milling operations on steel, stainless steel, cast iron, and similar materials. The centercutting geometry allows plunge milling in addition to standard side and slot cuts. It is a regular-length tool suitable for general-purpose setups where extended reach is not required. Machinists, tool-and-die makers, and maintenance technicians commonly select this series for everyday shop work.

Key Features

• M42 cobalt HSS construction for improved heat resistance over standard HSS
• Centercutting design enables plunge, slot, and peripheral milling
• 30-degree helix angle promotes chip flow and reduces cutting forces
• Right-hand cut with right-hand spiral flute, compatible with standard spindle rotation
• Uncoated finish suitable for use with cutting fluids and compatible with regrinding
• Two-flute configuration provides chip clearance in softer or gummy materials

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for standard 0.5 inch collet chucks, end mill holders, and milling machine spindles accepting a 0.5 inch straight shank.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Secure the shank firmly in a collet or end mill holder to the full shank engagement depth before use. Ensure the machine spindle is fully stopped and locked out before changing tooling. Follow applicable shop safety procedures and manufacturer feeds-and-speeds recommendations for the workpiece material.