Accupro 312662 Corner Radius End Mill 1/2 in 7 Flute Carbide

Product Description

The ACCUPRO 312662 is a solid carbide corner radius end mill designed for high-performance milling in demanding materials. Built from micrograin carbide and coated with AlCrTiN for heat and wear resistance, this tool delivers extended tool life in hardened steels, stainless, and high-temperature alloys. It runs a 7-flute, right-hand spiral configuration with a 38-degree helix angle, offering improved chip evacuation and surface finish in deep-cavity and long-reach applications. The 0.060-inch corner radius reduces stress concentration at the cutting edge, minimizing chipping in aggressive passes. Installed by machinists and toolroom technicians on CNC machining centers.

This end mill is suited for roughing and semi-finishing operations where extended reach is required. The 3.250-inch length of cut and 6.000-inch overall length make it appropriate for deep-pocket milling and tall-wall part features. The straight cylindrical shank at 1/2 inch diameter fits standard ER and end mill holders. Non-centercutting geometry means this tool is intended for side milling and ramping entry strategies rather than direct plunge cuts. Applicable in aerospace, die-mold, and general precision machining environments.

Key Features

• AlCrTiN coating provides high-temperature hardness and oxidation resistance for extended tool life
• 7-flute design increases feed rates and improves surface finish compared to standard 4-flute configurations
• Micrograin solid carbide substrate delivers superior rigidity and edge retention
• 0.060-inch corner radius reduces edge chipping and stress concentration during aggressive cuts
• 38-degree helix angle promotes efficient chip flow and reduces cutting forces in deep pockets
• Non-centercutting construction — requires side entry, ramping, or helical interpolation for pocket entry

Compatibility

Designed as an OEM-style replacement and general-purpose tooling option for CNC machining centers and manual mills accepting a 1/2-inch straight cylindrical shank end mill holder.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with CNC tooling setup. Ensure the spindle is fully stopped and the machine is in an e-stop or lockout state before loading or unloading tooling. Verify holder runout with a dial indicator before committing to a production setup, as excessive runout will accelerate edge wear on a 7-flute geometry. Because this tool is non-centercutting, program entry moves as a ramp or helical interpolation — never a straight Z-axis plunge.