Accupro 12183691 Corner Radius End Mill 3/8 in 4 Flute Carbide

Product Description

The ACCUPRO 12183691 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining environments. With a 3/8 inch diameter, a 1-1/2 inch length of cut, and a 0.02 inch corner radius, it delivers a controlled blend between a square end and a ball nose profile, reducing stress concentrations at workpiece corners. The 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. At 6 inches overall length, this is an extra-long configuration suited for reaching into deeper pockets and cavities. It is single-end, centercutting, and finished bright/uncoated. Machinists and CNC operators running ferrous and non-ferrous materials will find this tool a reliable choice for profiling and slotting work.

This end mill is applied in CNC machining centers and manual mills where a small corner radius is required to reduce notch stress or match a part print callout. The extra-long 6 inch overall length extends reach into deep pockets and stepped features where standard-length tools cannot access. The bright/uncoated finish makes it suitable for a range of materials without the thermal sensitivity that some coatings introduce. It is typically selected by machinists in job shops, aerospace component shops, and general precision manufacturing.

Key Features

• Solid carbide micrograin construction for rigidity and edge retention
• 0.02 inch corner radius reduces stress concentration and extends part life
• 40-degree helix angle promotes chip evacuation and reduces cutting forces
• Extra-long 6 inch overall length for deep pocket and extended-reach applications
• Centercutting design allows plunge and ramp entry
• Right-hand cut, right-hand spiral, single-end configuration

Compatibility

Designed as a direct-fit replacement or standard selection for CNC machining centers and manual knee mills using 3/8 inch collets or end mill holders. No specific machine model compatibility was provided in the product data.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The machine spindle must be stopped and locked out before inserting or removing the tool from the holder. Use a calibrated torque wrench and the appropriate collet or end mill holder rated for 3/8 inch shank tooling. Verify runout with a dial indicator after seating to confirm proper holding before beginning any cut.