Osg VG441-6257 Square End Mill 5/8 Inch 4 Flute Solid Carbide

Product Description

The OSG VG441-6257 is a solid carbide square end mill designed for high-performance milling in ferrous and non-ferrous materials. It carries a 5/8-inch cutting diameter with a 1-5/8-inch length of cut and a 5-inch overall length, making it well-suited for pocketing, slotting, and peripheral milling operations. The micrograin carbide substrate provides edge retention under demanding cutting conditions, while the TiAlN coating adds heat and wear resistance. Four spiral flutes with a 35-degree helix angle promote efficient chip evacuation and smooth surface finishes. This tool is installed and operated by machinists and CNC programmers in production and job-shop environments.

The VG441-6257 fits standard 5/8-inch collets and toolholders on CNC vertical machining centers, horizontal mills, and manual knee mills. Its centercutting geometry allows plunge entry directly into a workpiece. The variable index flute spacing reduces harmonic chatter at higher feed rates, making it a practical choice for harder steels, stainless alloys, and cast iron where vibration control matters. The right-hand cut and right-hand spiral configuration suits conventional and climb milling passes.

Key Features

• Solid micrograin carbide construction for superior hardness and edge retention
• TiAlN finish improves heat resistance and extends tool life in dry or near-dry cutting
• 35-degree helix angle with spiral flutes for efficient chip evacuation
• Variable index flute spacing reduces vibration and chatter in demanding cuts
• Centercutting design enables direct plunge milling without pre-drilling
• Right-hand cut, right-hand flute configuration for standard milling setups

Compatibility

Designed for use in standard 5/8-inch collet chucks, end mill holders, and shrink-fit toolholders on CNC and manual milling machines. Part of the OSG VG441 series.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and locked out before loading or removing the tool. Seat the shank to the full recommended engagement depth in the toolholder and torque retention screws per the toolholder manufacturer specifications. Verify runout with a dial indicator before engaging the workpiece, particularly for tight-tolerance operations.