Accupro 12183557 Corner Radius End Mill 1/2 in 4 Flute Carbide

Product Description

The ACCUPRO 12183557 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous materials. It features a 0.5 inch mill diameter, a 1 inch length of cut, and a 0.03 inch corner radius that reduces stress concentrations at part edges and extends tool life compared to sharp-corner geometries. The 4-flute, right-hand spiral configuration with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. Micrograin carbide construction provides the hardness and wear resistance required for demanding production environments. This tool is installed by machinists and CNC operators in shop and manufacturing settings.

This end mill suits applications in general-purpose and long-reach milling scenarios where a corner radius profile is specified on part prints. The single-end, centercutting design allows plunge entry as well as peripheral and slot milling. The 4 inch overall length accommodates setups requiring additional reach, and the 0.5 inch shank diameter is compatible with standard ER and end mill holders. It is commonly used on CNC machining centers and manual knee mills for profiling, contouring, and pocket milling where a radiused corner is required on the finished part.

Key Features

• 0.03 inch corner radius reduces edge stress and improves part surface finish at corners
• Micrograin solid carbide substrate delivers hardness and wear resistance for extended tool life
• 40-degree helix angle promotes smooth cutting action and efficient chip evacuation
• Centercutting geometry allows direct plunge entry without a pre-drilled pilot hole
• Bright/uncoated finish suited for use with cutting fluids on a wide range of materials
• Long-length configuration with 4 inch OAL provides additional reach for deep-feature setups

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill for standard 0.5 inch end mill holders and ER collet chucks used in CNC machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before mounting. Seat the shank fully in the holder to the recommended gauge length and torque the retention mechanism per the tool holder manufacturer specifications. Verify runout with a dial indicator before production cuts to protect both the tool and the workpiece.