Accupro 314661 Square End Mill 5/16 in 3 Flute Carbide Zrn

Product Description

The ACCUPRO 314661 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. It features a 5/16 inch (0.3125 inch) mill diameter with a 13/16 inch (0.8125 inch) length of cut and a 37-degree helix angle. The ZrN (zirconium nitride) coating improves surface hardness and wear resistance, extending tool life in demanding cutting conditions. With three flutes and a right-hand cutting direction, this end mill delivers efficient chip evacuation and clean edge geometry. It is a single-end tool made from micrograin solid carbide, suitable for high-speed finishing and moderate roughing passes.

This end mill is suited for use in CNC machining centers and manual mills handling ferrous and non-ferrous materials. The 5/16 inch shank diameter matches the mill diameter for direct collet or end mill holder mounting. The 37-degree helix and spiral flute geometry make it appropriate for profiling, slotting, and peripheral milling operations where surface finish and dimensional accuracy are priorities. Machinists and tool-and-die professionals working in job shop or production environments will find this tool applicable across a wide range of general-purpose milling tasks.

Key Features

• 5/16 inch mill diameter with micrograin solid carbide construction for rigidity and wear resistance
• ZrN coating for improved hardness and reduced tool wear in high-speed applications
• 37-degree helix angle promotes efficient chip flow and reduces cutting forces
• Three right-hand spiral flutes for clean cuts in profiling and slotting operations
• Centercutting capable, allowing plunge entry into workpiece material
• Single-end design with 2-1/2 inch overall length for standard reach applications

Compatibility

Designed as a standard 5/16 inch shank square end mill compatible with collet chucks, end mill holders, and tool holders sized for 5/16 inch straight shanks on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist following shop safety protocols. Ensure the spindle is fully stopped and the machine is powered down before inserting or removing the tool from the holder. Use an appropriate collet or end mill holder rated for the shank diameter and confirm runout with a dial indicator before cutting. Follow machine manufacturer feed and speed guidelines for carbide tooling and the specific workpiece material.