Osg 4550011 Square End Mill 0.5 in 3 Flute Cobalt Tialn

Product Description

The OSG 4550011 is a square end mill designed for precision milling operations in ferrous and hard materials. Built from cobalt high-speed steel and finished with a TiAlN coating, it delivers extended tool life under high-heat cutting conditions. The 3-flute geometry balances chip evacuation with a strong core, making it well-suited for slotting, profiling, and peripheral milling. At 0.5 inches in diameter with a stub-length design, this end mill provides rigidity and reduced deflection in tight-clearance applications. The 30-degree helix angle promotes smooth cutting action and efficient chip flow.

This end mill is intended for use in machining centers, CNC knee mills, and manual milling machines where stub-length rigidity is required. The centercutting capability allows plunge entry directly into the workpiece. Right-hand cut and right-hand flute configuration suits standard spindle rotation. Typical applications include die and mold work, stainless steel machining, and general-purpose ferrous metal removal where heat resistance and edge retention are priorities.

Key Features

• Cobalt HSS construction for heat resistance and wear life in tough alloys
• TiAlN finish increases surface hardness and oxidation resistance at elevated temperatures
• 3-flute design balances chip clearance with core strength for slotting and profiling
• 30-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Centercutting geometry enables direct plunge milling without a pre-drilled entry hole
• Stub length reduces overhang and deflection in close-tolerance work

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for standard 0.5 inch straight-shank tool holders, collet chucks, and end mill adapters used in CNC and manual milling applications.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or holder and torque set screws or collet nuts to the tool holder specification. Verify runout with a dial indicator before beginning a production cut to avoid premature tool wear or workpiece damage.