Accupro 12183268 Corner Radius End Mill 5/16 in 4 Flute

Product Description

The ACCUPRO 12183268 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and hard materials. Built from micrograin carbide and coated with AlTiN (aluminum titanium nitride), this single-end, centercutting tool delivers extended tool life in high-heat cutting environments. It features a 0.3125 inch mill diameter, a 0.010 inch corner radius, and a 40-degree helix angle. The four right-hand spiral flutes and extra-long 1-5/8 inch length of cut make it well-suited for deep-pocket and slot milling applications where rigidity and chip evacuation are critical.

This end mill is intended for use by machinists and tool-and-die professionals working on CNC machining centers and manual mills. The extra-long length of cut and 4 inch overall length allow access to deeper features without requiring extended-reach adapters in many setups. The AlTiN coating performs well in dry and semi-dry cutting of alloy steels, tool steels, stainless steel, and cast iron. The 5/16 inch shank diameter fits standard collets and end mill holders of the same bore size.

Key Features

• AlTiN coating for high-temperature resistance and extended tool life in ferrous materials
• Micrograin solid carbide construction for hardness and wear resistance
• 0.010 inch corner radius reduces stress concentration and chipping at cutting corners
• 40-degree helix angle promotes smooth chip flow and reduces cutting forces
• Centercutting design allows plunge milling directly into workpiece material
• Extra-long length of cut (1-5/8 inches) suited for deep pocket and slot operations

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide corner radius end mill compatible with standard 5/16 inch bore collets and end mill holders on CNC and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist familiar with toolholder torque procedures and runout specifications. Ensure the spindle and toolholder are clean and free of chips before seating the shank. Verify shank engagement depth meets the toolholder manufacturer minimum before operation. Always confirm spindle direction matches the right-hand cutting direction of this tool before starting the machine.