Accupro 310987 Corner Radius End Mill 5/8 in 4 Flute

Product Description

The ACCUPRO 310987 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 5/8-inch diameter with a 0.030-inch corner radius and carries an AlCrTiN coating for elevated heat resistance and extended tool life in high-speed applications. The 4-flute, right-hand spiral configuration with a 38-degree helix promotes efficient chip evacuation and smooth surface finish. With a 6-inch overall length and a 4.125-inch reach, this extended-reach end mill handles deep-pocket and hard-to-reach features that standard-length tools cannot access. It is centercutting, allowing plunge entry, and is built from micrograin carbide stock for edge integrity under demanding cutting conditions.

This end mill is suited for moldmaking, die work, aerospace components, and general precision machining where a corner radius profile is required to reduce stress concentrations at the base of milled features. The extended reach and reduced neck diameter of 0.593 inches make it appropriate for deep-cavity work in vertical and horizontal machining centers. It is a single-end tool intended for CNC milling applications requiring consistent corner geometry and reliable coating performance at elevated spindle speeds.

Key Features

• AlCrTiN coating for high-temperature resistance and extended tool life
• Micrograin solid carbide construction for sharp, durable cutting edges
• Extended reach of 4.125 inches with reduced neck for deep-cavity access
• 0.030-inch corner radius reduces stress risers and improves surface finish at pocket floors
• Variable index flute spacing reduces harmonic chatter during cuts
• Centercutting design allows direct plunge entry without pre-drilling

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC vertical and horizontal machining centers accepting a 5/8-inch straight shank end mill.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the shank in a collet chuck or end mill holder rated for the shank diameter before powering the spindle. Verify tool runout with a dial indicator before cutting to protect both the workpiece and the cutting edge. Consult the machine tool manufacturer specifications and applicable shop safety procedures when setting spindle speeds and feed rates.