Accupro 312591 Corner Radius End Mill 3/8 in 7 Flute

Product Description

The ACCUPRO 312591 is a solid carbide corner radius end mill designed for high-performance milling in demanding metalworking applications. It features a 3/8-inch diameter with a 0.060-inch corner radius, seven flutes, and a right-hand spiral flute configuration. The tool carries an AlCrTiN coating for improved heat resistance and tool life at elevated cutting speeds. With a 1-inch length of cut and a 2.5-inch overall length, this end mill is well-suited for finishing passes and contour milling where edge integrity and surface finish matter. It is a single-end, non-centercutting tool on a straight cylindrical shank.

This end mill is used in CNC machining centers and manual milling operations across job shops, production facilities, and tool rooms. The micrograin solid carbide construction handles hardened steels, stainless, and high-temperature alloys. The 38-degree helix promotes chip evacuation in deep-pocket and side-wall operations. The non-centercutting design means it is intended for side milling and profiling rather than plunge cutting. Machinists and CNC programmers working on precision components will find the seven-flute count beneficial for fine surface finishes at higher feed rates.

Key Features

• 3/8-inch diameter with 0.060-inch corner radius for controlled edge blending
• 7-flute, right-hand spiral configuration for superior surface finish and higher feed rates
• AlCrTiN coating provides elevated heat resistance and extended tool life
• Micrograin solid carbide substrate for rigidity and wear resistance
• 38-degree helix angle aids chip evacuation in side-wall and contour milling
• Straight cylindrical shank compatible with standard ER and end mill holders
• Non-centercutting design optimized for profiling and peripheral milling

Compatibility

Designed as a direct-fit replacement for 3/8-inch straight-shank corner radius end mill applications in standard end mill holders and collet chucks accepting a 3/8-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the holder to the minimum recommended grip depth and torque set screws or collet nuts per the holder manufacturer specifications. Verify runout with a dial indicator before beginning a production cut, as excessive runout reduces tool life and degrades surface finish.