Accupro 12183516 Corner Radius End Mill 5/16 in 4 Flute Altin

Product Description

The ACCUPRO 12183516 is a solid carbide corner radius end mill designed for high-performance milling in demanding machining environments. It features a 5/16 inch (0.3125 inch) mill diameter, a 0.015 inch corner radius, and four right-hand spiral flutes for efficient chip evacuation and smooth cutting action. The tool carries an AlTiN (aluminum titanium nitride) coating, which provides high heat resistance and extended tool life in hard and abrasive materials. With a 1 inch length of cut and 4 inch overall length, this is a long-length configuration suited for deeper reach applications. It is single-end, center-cutting, and built from micrograin carbide stock for tight tolerances and consistent edge integrity.

This end mill is used in CNC machining centers and manual mills for finishing and semi-finishing passes where a radiused corner is required to reduce stress concentrations or meet part geometry specs. The AlTiN coating makes it well-suited for cutting alloy steels, stainless steels, cast iron, and high-temperature alloys at elevated speeds. The corner radius geometry also helps prevent chipping at the cutting edge during interrupted cuts or side-milling operations. Machinists and tool-and-die professionals working in job shops, aerospace, and general metalworking will find this tool appropriate for tight-tolerance profiling and contouring work.

Key Features

• Solid micrograin carbide construction for high rigidity and edge retention
• AlTiN coating for extended tool life in hard and heat-generating materials
• 0.015 inch corner radius reduces edge chipping and meets radiused corner requirements
• Four right-hand spiral flutes for efficient chip removal
• Center-cutting design allows for direct plunge entry
• Long-length configuration with 1 inch LOC and 4 inch OAL for extended reach

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers and manual mills accepting a 5/16 inch straight shank end mill.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Secure the shank in a collet or end mill holder to the appropriate clamping torque per the toolholder manufacturer specifications. Verify runout at the spindle before cutting. Always power down and lock out the spindle before changing or inspecting tooling.