Accupro 12183209 Corner Radius End Mill 3/16 in 4 Flute

Product Description

The ACCUPRO 12183209 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining applications. It features a 3/16 inch diameter with a 0.0450 inch corner radius, providing controlled edge geometry that reduces stress concentration and extends tool life in demanding cuts. The 4-flute spiral design with a 40-degree right-hand helix promotes efficient chip evacuation and smooth surface finishes. With a 1-1/8 inch length of cut and a 3 inch overall length, this is an extra-long configuration suited to deeper reach applications. It is installed by machinists and CNC operators on vertical mills, machining centers, and manual knee mills.

This end mill is suited for profiling, slotting, and contouring operations on ferrous and non-ferrous materials where a radiused corner is required to prevent sharp-edge chipping or to match a blended fillet geometry. The bright uncoated finish makes it appropriate for use in aluminum and other softer alloys where coatings can cause material adhesion. The centercutting capability allows direct plunge entry into the workpiece without a pre-drilled pilot hole, supporting both ramping and full-depth plunge moves on CNC and manual equipment.

Key Features

• Solid carbide micrograin construction for rigidity and wear resistance in precision cuts
• 0.0450 inch corner radius reduces edge chipping and blends fillet geometry
• 4-flute, 40-degree helix for efficient chip evacuation and improved surface finish
• Extra-long configuration with 1-1/8 inch LOC and 3 inch OAL for deeper reach operations
• Centercutting design permits direct plunge entry without a pilot hole
• Bright uncoated finish suitable for aluminum and non-ferrous materials

Compatibility

Designed as an OEM-style replacement and standard-use corner radius end mill for CNC machining centers and manual mills accepting a 3/16 inch straight shank tool holder.

Installation Notes

Installation is performed by machinists using a compatible collet, end mill holder, or set-screw holder sized for a 3/16 inch shank. Ensure the spindle is fully powered down and locked before changing tooling. Confirm runout and tool projection length against the programmed depth of cut before beginning operation. Follow machine manufacturer guidelines and applicable shop safety standards when securing and torquing tool holders.