Accupro 12180501 Corner Radius End Mill 0.5in 4 Flute

Product Description

The ACCUPRO 12180501 is a solid carbide corner radius end mill designed for precision milling of ferrous and hardened materials. It features a 0.5 inch diameter cutting profile with a 0.0100 inch corner radius that reduces edge chipping and improves surface finish on part corners. The 4-flute, right-hand spiral geometry paired with an AlTiN coating delivers heat resistance and extended tool life in high-speed machining environments. With a 1.25 inch length of cut and 3.0 inch overall length, this single-end centercutting tool handles both plunge and peripheral cutting operations. It is installed and operated by machinists in job shop, tool room, and production CNC environments.

This end mill is suited for milling steel, stainless steel, cast iron, and hardened alloys in vertical and horizontal CNC machining centers. The 0.5 inch shank diameter fits standard ER and end mill holders. The 40-degree helix angle promotes efficient chip evacuation during deep-pocket and slot milling operations. Variable index flute spacing helps reduce harmonic vibration, making it appropriate for both roughing and finishing passes where corner geometry control is critical.

Key Features

• 0.0100 inch corner radius reduces stress concentration and edge breakout on workpiece corners
• AlTiN coating provides oxidation resistance and hardness retention at elevated cutting temperatures
• 40-degree helix angle supports aggressive chip evacuation in deep slots and pockets
• Variable index flute geometry reduces chatter during high-speed machining passes
• Centercutting design allows direct plunge entry without a pre-drilled start hole
• Micrograin solid carbide substrate delivers rigidity and wear resistance

Compatibility

Designed as an OEM-style replacement and standard fitment for CNC machining centers accepting 0.5 inch shank end mill holders including ER32, ER40, and similar collet systems.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with CNC tooling setup and speeds-and-feeds calculations. Ensure the spindle is fully stopped and the machine is in an E-stop or lockout state before changing tooling. Seat the shank fully into the holder to the recommended engagement depth and torque the retention mechanism per the holder manufacturer specification. Confirm runout with a dial indicator before beginning the cut to protect both the tool and the workpiece.