Accupro 2500346 Square End Mill 1/4in 6 Flute Carbide Altin

Product Description

The ACCUPRO 2500346 is a 6-flute, solid carbide square end mill designed for high-performance milling in demanding materials. It carries a 1/4 inch cutting diameter, a 3/4 inch length of cut, and a 4 inch overall length, placing it in the long-reach category. The AlTiN (aluminum titanium nitride) coating provides high-heat resistance and extended tool life when cutting hardened steels, stainless alloys, and cast iron at elevated speeds. Micrograin carbide substrate adds toughness and edge retention. The 25-degree helix angle and variable index flute geometry help reduce chatter and improve chip evacuation in deep-pocket and slotting operations. Machinists and tool-and-die professionals use this end mill in CNC machining centers and manual knee mills alike.

This end mill is suited for finish and semi-finish milling of ferrous metals, hardened steels, and high-temperature alloys in both production shop and job-shop environments. The long-reach geometry makes it appropriate for deep-cavity work, die pockets, and applications where standard-length tools cannot reach the floor of the cut. The 1/4 inch shank diameter fits standard collet chucks and end mill holders common to light-duty spindles and high-speed machining centers.

Key Features

• 6-flute design increases feed-per-tooth potential and improves surface finish compared to 4-flute geometry
• AlTiN coating delivers high-temperature hardness and oxidation resistance for dry and near-dry cutting
• Micrograin carbide substrate provides a fine, consistent cutting edge and improved wear resistance
• 25-degree right-hand helix promotes smooth chip flow and reduces radial cutting forces
• Variable index flute spacing reduces harmonic vibration and chatter during aggressive cuts
• Center-cutting capability allows plunge entry as well as peripheral and slot milling

Compatibility

Designed as an OEM-style replacement or direct-fit option for 1/4 inch collet chucks, end mill holders, and shrink-fit tooling systems accepting a 1/4 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Use a calibrated collet or end mill holder torqued to the tool holder manufacturer's specification to prevent pullout. Verify runout with a dial indicator after installation before beginning a cut, particularly for tight-tolerance finishing operations.