Accupro 312018 Corner Radius End Mill 1/8 in 5 Flute

Product Description

The ACCUPRO 312018 is a solid carbide corner radius end mill engineered for precision milling in demanding machining environments. It features a 1/8-inch diameter with a 3/16-inch length of cut and a 0.020-inch corner radius that reduces stress concentrations at the bottom of a cut and extends tool life in harder workpiece materials. The 5-flute, right-hand spiral geometry combined with a 38-degree helix angle promotes efficient chip evacuation and smooth surface finishes. An AlCrTiN coating provides thermal resistance and wear protection at elevated cutting speeds. This tool is centercutting and extended-reach capable, making it suited for deep-pocket and slotting applications where standard-length tools cannot reach.

The 312018 is used in CNC milling operations across job shops, tool-and-die, aerospace component, and precision parts manufacturing environments. Its extended reach design, with a 1/2-inch reach length and a reduced neck diameter of 0.118 inches, targets applications requiring access to deep features or thin-wall sections. It is a single-end tool with a 1/8-inch shank diameter, fitting standard 1/8-inch collets and toolholders. Machinists working with aluminum, hardened steels, stainless, and titanium alloys will find the micrograin carbide substrate and AlCrTiN coating suited to their cutting conditions.

Key Features

• AlCrTiN coating for high-temperature wear resistance in ferrous and non-ferrous materials
• 5-flute variable-index geometry reduces harmonic vibration during high-speed cutting
• 0.020-inch corner radius extends tool life and improves surface finish at floor transitions
• Extended reach with 0.500-inch reach length and 0.118-inch reduced neck diameter for deep-feature access
• Centercutting design allows direct plunge entry without pre-drilling
• Micrograin solid carbide substrate for rigidity and edge retention

Compatibility

Designed as an OEM-style solid carbide corner radius end mill for use in standard 1/8-inch collet chucks and milling toolholders on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in an e-stop or locked-out state before loading or removing the tool. Seat the 1/8-inch shank fully and evenly in a clean, undamaged collet to the recommended gauge-line depth before torquing the collet nut. Inspect the corner radius and cutting edges for chipping before each setup, as carbide tooling can be damaged by improper storage or handling.