Accupro 12177392 Corner Radius End Mill 3/8 in 7 Flute

Product Description

The ACCUPRO 12177392 is a solid carbide corner radius end mill designed for high-performance milling in demanding machining applications. It features a 3/8-inch diameter, a 0.03-inch corner radius, and 7 flutes with a right-hand spiral and right-hand cutting direction. The micrograin carbide substrate is coated with nACRo, a nanocomposite coating that supports higher cutting speeds and extended tool life in hardened steels and abrasive materials. With an overall length of 6 inches and a 1/2-inch length of cut, this tool is suited for machinists and tooling specialists working on precision milling operations.

This end mill fits residential shop, production, and job shop environments where corner radius geometry is required to reduce stress concentrations at part features. The extended reach design, with a 3-1/8-inch reach length and a 0.355-inch neck diameter, allows access to deeper pockets and recessed features without tool interference. The centercutting design permits plunge entry, and the variable index flute spacing helps reduce chatter during aggressive cuts. Single-end construction with a 3/8-inch shank diameter makes it compatible with standard collet chucks and end mill holders.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• nACRo nanocomposite coating for performance in hardened and abrasive workpiece materials
• 7-flute variable index design reduces chatter and improves surface finish
• 0.03-inch corner radius with a tolerance of plus or minus 0.0015 inches
• Extended reach with 3-1/8-inch reach length and 0.355-inch neck diameter for deep pocket access
• Centercutting geometry allows direct plunge milling

Compatibility

Designed as an OEM-style replacement and standard fitment for 3/8-inch collet chucks and end mill holders used in CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully powered down and the machine is in a safe state before mounting or removing the tool. Use a properly sized collet or end mill holder and torque the retention mechanism according to the machine manufacturer specifications. Verify runout with a dial indicator after installation before commencing any cut.