Osg HP421-5000 Square End Mill 0.5in 2 Flute Tialn Carbide

Product Description

The OSG HP421-5000 is a solid carbide square end mill designed for high-performance material removal in precision machining applications. Built on OSG's HP421 series platform, it features a 0.5 inch cutting diameter, a 1 inch length of cut, and a 35-degree helix angle with a TiAlN finish for extended tool life under elevated cutting temperatures. The micrograin carbide substrate provides rigidity and wear resistance suited to demanding milling operations. This tool is centercutting capable and runs with right-hand cut and right-hand spiral flute geometry. Machinists and tool-and-die professionals working in job shops, production machining, or maintenance environments are the primary installers and operators of this tool.

The HP421-5000 is well suited for slotting, peripheral milling, and plunge operations on ferrous and non-ferrous materials. Its 2-flute configuration provides effective chip evacuation in full-slot and deep-pocket cuts. The 0.5 inch shank diameter matches directly to standard ER collet chucks, end mill holders, and hydraulic toolholders in that bore size. With a 3 inch overall length and no extended-reach designation, this mill fits standard setups where rigidity is prioritized over reach.

Key Features

• TiAlN coating for heat resistance and extended tool life at elevated cutting speeds
• Micrograin solid carbide substrate for rigidity and edge retention
• 35-degree helix angle promotes smooth cutting action and chip evacuation
• Centercutting geometry allows direct plunge entry into the workpiece
• Right-hand cut, right-hand spiral flute configuration for standard CNC and manual milling setups
• 2-flute design supports chip clearance in slotting and pocket milling

Compatibility

Designed as an OEM-specification solid carbide square end mill for use in standard 0.5 inch bore end mill holders, ER collet chucks, and hydraulic toolholders on CNC machining centers and manual knee mills.

Installation Notes

Installation is performed by a machinist or toolroom professional. Ensure the machine spindle is fully stopped and the tool is secured in a properly sized and clean toolholder before tightening. Verify runout with a dial indicator after clamping, as excessive runout accelerates edge wear and degrades surface finish. Follow machine manufacturer torque guidelines for the collet nut or toolholder retention hardware.