Accupro 12182837 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 12182837 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 5/16-inch diameter with a 0.09-inch corner radius and four right-hand spiral flutes, producing a radiused edge that reduces stress concentration and improves surface finish at part corners. The stub-length geometry and 40-degree helix angle promote chip evacuation and cutting stability. The bright uncoated finish is suited for applications where coating-free tool contact is preferred or required. Machinists and tool-and-die professionals select this style of end mill when corner geometry needs to match a tight blueprint tolerance.

This end mill is appropriate for general-purpose milling, profiling, slotting, and finishing passes on CNC machining centers and manual mills. The centercutting design allows plunge entry, adding flexibility to the operation. The stub flute length of 1/2 inch keeps deflection low when working in tighter workpiece features. With a 2-inch overall length and 5/16-inch shank, it fits standard ER and set-screw toolholders commonly used in job-shop and production environments.

Key Features

• 0.09-inch corner radius reduces stress concentration and improves corner surface finish
• Four right-hand spiral flutes with 40-degree helix for efficient chip evacuation
• Solid micrograin carbide construction for rigidity and wear resistance
• Centercutting design permits direct plunge entry into the workpiece
• Bright uncoated finish suitable for non-ferrous and coating-sensitive applications
• Stub length geometry minimizes deflection in shallow-depth milling passes

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers and manual mills accepting a 5/16-inch shank diameter in ER collets, set-screw holders, or equivalent 5/16-inch toolholding systems.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for toolholder torque and runout inspection. Verify shank seating depth and runout with a dial indicator before initiating cuts. Ensure the spindle is fully stopped and the machine is in a safe state before changing or adjusting tooling. Do not exceed the recommended depth of cut or feed rate for the material being machined.