Accupro 12183191 Corner Radius End Mill 1/8 in 4 Flute

Product Description

The ACCUPRO 12183191 is a solid carbide corner radius end mill designed for precision milling in metalworking and machining applications. It features a 1/8 inch diameter with a 0.045 inch corner radius and a 1 inch length of cut, providing a controlled edge geometry that reduces chipping and stress concentration at part corners. The 40-degree helix angle promotes smooth chip evacuation and reduces cutting forces. With four flutes and a bright uncoated finish, this tool is suited for high-precision work in ferrous and non-ferrous materials. It is installed and operated by machinists and CNC tooling professionals in production and job-shop environments.

This end mill is used in vertical machining centers, CNC mills, and manual mills where corner radius profiles are required on slots, pockets, and contoured surfaces. The single-end, centercutting design allows plunge entry as well as standard peripheral and slot milling. The extra-long 3 inch overall length provides additional reach for deeper cavity work. The micrograin carbide grade supports tight tolerances and extended tool life in demanding cuts.

Key Features

• 0.045 inch corner radius reduces stress concentration and extends part life at milled corners
• Solid micrograin carbide construction for wear resistance and dimensional stability
• 40-degree helix angle promotes efficient chip evacuation and smooth cutting action
• Centercutting design allows direct plunge milling without a pre-drilled hole
• Bright uncoated finish suits applications where coating interaction with workpiece material is a concern
• Extra-long 3 inch OAL provides reach for deep cavities and extended-reach setups

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 1/8 inch collets and tool holders used in CNC and manual milling machines requiring a corner radius end mill profile.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. The machine spindle must be fully stopped and locked before changing or seating tooling. Use a properly sized collet or end mill holder matched to the 1/8 inch shank diameter; confirm runout with a dial indicator before cutting. Follow shop-standard torque procedures for collet nut tightening and verify tool projection matches the programmed reach before initiating a cut.