Accupro 12176900 Corner Radius End Mill 1/16 in 4 Flute

Product Description

The ACCUPRO 12176900 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking and machining applications. It features a 1/16 inch cutting diameter, a 0.015 inch corner radius, and 4 right-hand spiral flutes with a 30-degree helix angle. The cutting edge is centercutting-capable, allowing plunge entry into workpieces. An AlTiN (aluminum titanium nitride) coating improves heat resistance and extends tool life when cutting hard alloys, stainless steels, and high-temperature materials. This tool is used by CNC machinists and tool-and-die professionals running tight-tolerance finish and semi-finish passes.

This end mill is suited for small-feature milling operations such as slot milling, profiling, and contouring in ferrous and non-ferrous materials. Its 1/16 inch diameter and 3/16 inch length of cut make it appropriate for fine detail work and restricted-access pockets where larger tooling cannot reach. The 1/8 inch shank diameter fits standard ER and collet-style toolholders common in vertical machining centers and CNC routers. Micrograin carbide substrate provides rigidity and edge retention at small diameters. It is a single-end tool with right-hand cutting direction.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance at 1/16 inch diameter
• AlTiN coating for elevated heat and oxidation resistance during high-speed cuts
• 0.015 inch corner radius reduces stress concentration and improves surface finish at part edges
• 4-flute, 30-degree right-hand spiral design for efficient chip evacuation and smooth finish
• Centercutting geometry allows direct plunge entry without pre-drilling
• 1/8 inch shank fits standard collet toolholders without adapters

Compatibility

Designed as a direct-fit replacement-style solid carbide corner radius end mill for use in standard 1/8 inch collet or ER-style toolholders on CNC vertical machining centers, manual mills, and high-speed spindle systems.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and power is locked out before changing tooling. Seat the 1/8 inch shank fully into the collet and torque the nut to the toolholder specification before running. At 1/16 inch diameter, this tool is sensitive to runout and excessive side load — verify collet condition and minimize overhang to avoid breakage during operation.