Accupro 12182798 Corner Radius End Mill 1/4 in 4 Flute Carbide

Product Description

The ACCUPRO 12182798 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and non-ferrous metals, hardened steels, and engineering alloys. It features a 1/4 inch mill diameter, a 3/8 inch length of cut, and a 0.045 inch corner radius that reduces stress concentrations at part features and extends tool life compared to sharp-corner geometry. The 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. With four flutes and a bright uncoated finish, this tool suits applications where base carbide hardness is sufficient and coating buildup on cutting edges must be avoided. Machinists and tool-and-die shops use this end mill on CNC machining centers and manual mills.

This end mill is suited for finishing and semi-finishing passes where a controlled corner radius is required by part geometry or drawing callout. The stub length type and 2 inch overall length provide rigidity in tight setups and short-reach applications. Centercutting capability allows plunge entry, adding flexibility in pocket milling and slotting operations. Right-hand flute direction and right-hand cutting direction are standard for conventional CNC spindle rotation.

Key Features

• 0.045 inch corner radius reduces edge chipping and improves surface finish at part corners
• Micrograin solid carbide construction for hardness and wear resistance
• 40-degree helix angle promotes efficient chip evacuation
• Centercutting design allows direct plunge entry
• Bright/uncoated finish suitable for non-ferrous metals and applications where coatings are not preferred
• Right-hand cut, right-hand spiral with four flutes for balanced cutting forces

Compatibility

Designed as a standard 1/4 inch shank corner radius end mill compatible with any CNC machining center, knee mill, or milling fixture accepting a 1/4 inch tool holder or collet.

Installation Notes

Installation should be performed by a qualified machinist. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the 1/4 inch shank fully and evenly in a clean, undamaged collet or end mill holder and torque the retention hardware per the tool holder manufacturer specifications. Verify runout with a dial indicator before beginning the cut to protect both the tool and the workpiece.