Osg VG441-6259 Square End Mill 5/8 in 4 Flute Solid Carbide

Product Description

The OSG VG441-6259 is a solid carbide square end mill designed for high-performance milling in demanding machining environments. With a 5/8-inch cutting diameter, a 3-inch length of cut, and a 6-inch overall length, this tool handles deep-reach profiling, slotting, and peripheral milling operations. The TiAlN coating provides thermal resistance and wear protection at elevated cutting speeds. A 35-degree helix angle improves chip evacuation and reduces cutting forces. Machinists and toolroom operators running CNC machining centers or manual knee mills in job shops and production environments rely on this end mill for consistent performance in ferrous and non-ferrous workpiece materials.

The VG441-6259 is suited for milling operations on steel, alloy steel, stainless steel, and similar materials where carbide tooling and a protective coating are required. The 5/8-inch shank diameter matches common ER collet and end mill holder sizes. The centercutting geometry allows plunge entry into the workpiece. Variable index flute spacing reduces harmonic vibration during interrupted cuts and full-slot operations. This tool is a single-end design, meaning it is replaced rather than reground when worn, which suits production environments focused on consistent tool life and repeatability.

Key Features

• Solid carbide micrograin substrate for rigidity and wear resistance
• TiAlN finish for high-temperature performance and extended tool life
• 35-degree spiral flute helix for efficient chip evacuation
• Centercutting design allows direct plunge milling
• Variable index flute spacing reduces chatter during aggressive cuts
• Right-hand cut, right-hand flute configuration for standard spindle rotation

Compatibility

Designed for use in CNC machining centers and manual milling machines with 5/8-inch ER collets or end mill holders. Part of the OSG VG441 series.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully into the collet or holder and torque the retention nut to the holder manufacturer's specification. Verify runout with a dial indicator before beginning the cut to maximize tool life and surface finish quality.