Accupro 317218 Corner Radius End Mill 1/2 in 8 Flute

Product Description

The ACCUPRO 317218 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining environments. Built from micrograin solid carbide with an AlCrTiN coating, it delivers extended tool life and heat resistance during high-speed cutting. The 317218 features an 8-flute single-end design with a 0.0300 inch corner radius, a 0.5 inch mill diameter, and a 1.25 inch length of cut. It runs in a right-hand cutting and flute direction with a 40-degree helix angle. This tool is installed by machinists and CNC operators in production and job shop settings.

This end mill is suited for finishing and semi-finishing cuts in ferrous and hardened materials where corner edge integrity is critical. The centercutting geometry allows for plunge entry, expanding its use in slotting, profiling, and pocket milling applications. The straight-cylindrical 0.5 inch shank fits standard ER and end mill holders used on vertical machining centers and CNC mills. The Series HS designation indicates it is built for high-speed machining applications where rigidity and coating performance matter.

Key Features

• AlCrTiN coating provides high heat resistance and wear protection during aggressive cuts
• 8-flute configuration increases feed rates and improves surface finish on finish passes
• 0.0300 inch corner radius reduces stress concentration at the cutting edge and extends tool life
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Micrograin solid carbide substrate offers superior hardness and edge retention
• 40-degree helix angle promotes efficient chip evacuation in deep pockets and slots

Compatibility

Designed as an OEM-style replacement-grade end mill compatible with standard 1/2 inch straight-cylindrical end mill holders and collet chucks used on CNC vertical machining centers and manual mills.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the spindle before securing or removing the tool from the holder. Use a calibrated torque wrench and appropriate end mill holder or collet to seat the shank fully, meeting the shank diameter tolerance of +0.000 / -0.002 inches. Inspect the cutting edges and coating for damage before each use and replace the tool if chipping or wear is visible at the corner radius.