Osg 5220505 Square End Mill 3/8 in 2 Flute Cobalt Tin

Product Description

The OSG 5220505 is a cobalt square end mill designed for general-purpose milling operations in machine shop and production environments. Built from M42 cobalt high-speed steel, this double-end tool features a TiN (titanium nitride) coating and a 30-degree spiral flute geometry that promotes efficient chip evacuation and reduced cutting forces. With a 3/8 inch cutting diameter and a 9/16 inch length of cut, it handles slotting, profiling, and peripheral milling on a range of ferrous and non-ferrous materials. Two flutes and centercutting capability allow plunge entry without a pre-drilled hole. Installation and use follow standard CNC or manual mill setup procedures familiar to machinists and tool-and-die professionals.

The OSG 5220505 is suited for use on vertical and horizontal milling machines, machining centers, and manual knee mills. Its 3/8 inch shank diameter fits standard ER collets, end mill holders, and Weldon-style tool holders common in job shop and production settings. The regular-length body and 3-1/8 inch overall length make it appropriate for general milling work where extended reach is not required. Right-hand cut and right-hand flute configuration is the standard orientation for conventional and climb milling operations.

Key Features

• M42 cobalt HSS construction for improved heat and wear resistance over standard M2 tooling
• TiN coating reduces friction and extends tool life on ferrous materials
• 30-degree helix spiral flute promotes smooth cutting action and chip flow
• Centercutting design allows direct plunge milling without a pilot hole
• Double-end configuration provides two usable cutting ends per tool
• Right-hand cut, right-hand flute — compatible with standard spindle direction on most mills

Compatibility

Designed as a general-purpose replacement or production end mill fitting any milling machine or machining center with a 3/8 inch tool-holding capability in ER collet, end mill holder, or equivalent systems.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom practices. Power down and lock out the machine spindle before loading or unloading any end mill. Seat the shank fully in the collet or holder to the minimum recommended grip depth and torque the drawbar or nut per the tool-holder specification. Inspect the tool for coating damage or chipping before each use; do not run a visibly damaged cutter.