Accupro 12182811 Corner Radius End Mill 1/4 in 4 Flute Altin

Product Description

The ACCUPRO 12182811 is a solid carbide corner radius end mill designed for precision milling of ferrous and hardened materials. With a 1/4 inch mill diameter, a 0.015 inch corner radius, and a 40-degree helix angle, this tool reduces cutting forces and produces smooth floor and wall finishes in demanding applications. The AlTiN coating provides thermal resistance and extended tool life in dry or high-speed machining environments. It is a single-end, center-cutting design with right-hand flute direction and right-hand cutting direction. Machinists and toolroom professionals rely on this geometry for profiling, slotting, and contouring operations where edge integrity is critical.

This end mill is suited for use on CNC machining centers and manual mills in job shop, production, and toolroom environments. The stub length type and 3/8 inch length of cut make it appropriate for shallow-to-moderate depth passes where rigidity and minimal deflection are priorities. The micrograin carbide substrate supports tight tolerances and consistent performance across production runs in steel, stainless, cast iron, and similar materials. It ships individually and is sold in single units.

Key Features

• AlTiN coating for high-temperature resistance and extended tool life in ferrous materials
• Micrograin solid carbide substrate for rigidity and dimensional consistency
• 0.015 inch corner radius reduces stress concentration and improves edge durability
• 40-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Center-cutting design allows plunge entry without a pre-drilled hole
• Right-hand spiral flutes with stub length for maximum rigidity in short-reach applications

Compatibility

Designed as an OEM-style replacement or direct-use tooling for CNC and manual milling machines accepting a 1/4 inch shank diameter end mill with standard ER or collet-style toolholders.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for toolholder torque and runout specifications. Ensure the shank is fully seated and clamped to the correct depth in the toolholder before operation. Verify spindle RPM and feed rate settings match the material being cut before engaging the workpiece. Inspect the cutting edges for chips or wear before each use and replace the tool when corner radius integrity can no longer be maintained.