Accupro 312149 Corner Radius End Mill 3/8 in 5 Flute

Product Description

The ACCUPRO 312149 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, five flutes, and an AlCrTiN coating that resists heat and wear at elevated cutting speeds. The overall length is 4 inches with a 1/2 inch length of cut and a 2.125 inch reach length, making it suitable for extended-reach operations where standard length tools fall short. Micrograin carbide construction and a variable index design contribute to reduced chatter and improved surface finish. This is a single-end, centercutting tool with right-hand flute direction and right-hand cutting direction.

This end mill is built for use in CNC machining centers and manual mills handling ferrous metals, hardened steels, and high-temperature alloys where AlCrTiN coating provides oxidation resistance. The extended reach geometry suits deep-pocket milling, slotting, and profiling where clearance between the spindle and workpiece is limited. It is appropriate for job shop, production machining, and tool room environments. The 38-degree helix promotes efficient chip evacuation in both climb and conventional milling passes.

Key Features

• AlCrTiN coating for high heat and wear resistance in ferrous and hardened materials
• Micrograin solid carbide substrate for rigidity and edge retention
• Five-flute variable index design reduces chatter and improves surface finish
• Extended reach of 2.125 inches with a reduced neck diameter of 0.356 inches
• Centercutting capability allows plunge entry into the workpiece
• Right-hand spiral flutes with 38-degree helix for effective chip evacuation

Compatibility

Designed as an OEM-style replacement or direct-application solid carbide corner radius end mill for use in 3/8 inch collets or end mill holders on standard CNC or manual milling equipment.

Installation Notes

Installation should be performed by a qualified machinist familiar with toolholder torque requirements and runout specifications. Ensure the shank is fully seated and clean in the collet or end mill holder before tightening. Verify spindle speeds and feed rates against the coating and substrate recommendations for the material being cut. Do not exceed the rated depth of cut for the length of cut dimension to avoid tool deflection or breakage.