Accupro 311785 Corner Radius End Mill 3/4in 5 Flute Carbide

Product Description

The ACCUPRO 311785 is a solid carbide corner radius end mill designed for high-performance milling in demanding production environments. It features a 3/4 inch diameter, a 1-5/8 inch length of cut, and a 4 inch overall length. The cutting end carries a 0.030 inch corner radius and five flutes with a 38-degree helix angle and variable index geometry, which helps reduce chatter and improve surface finish. An AlCrTiN coating provides elevated heat resistance and extended tool life in ferrous and hardened materials. This tool is center-cutting and suited for plunging, slotting, and profiling operations. It is installed and used by CNC machinists and tool and die professionals.

The 311785 is intended for use in vertical and horizontal CNC machining centers where high-feed, high-speed milling of steel, alloy steel, stainless steel, and hardened materials is required. Its micrograin solid carbide substrate combined with the AlCrTiN coating makes it well suited for aggressive material removal and finishing passes in tool rooms, job shops, and production floors. The single-end configuration and 3/4 inch shank diameter allow direct mounting in standard tool holders sized for 3/4 inch bore.

Key Features

• 5-flute design with 38-degree helix angle for efficient chip evacuation and reduced vibration
• Variable index geometry minimizes harmonic chatter during heavy cuts
• AlCrTiN coating delivers high-temperature wear resistance for extended tool life
• Micrograin solid carbide substrate provides rigidity and edge retention
• 0.030 inch corner radius protects the cutting edge and reduces stress concentrations in workpiece corners
• Center-cutting capability allows direct plunge entry without a pre-drilled pilot hole

Compatibility

Designed for use in standard CNC machining center tool holders with a 3/4 inch bore. Verify holder runout and collet condition before installation to maintain diameter tolerance of +0.000 / -0.001 inches.

Installation Notes

Installation is performed by qualified CNC machinists or tooling setup personnel. Power down and lock out the spindle before changing tooling. Seat the shank fully in the holder and torque the retention mechanism per the tool holder manufacturer specifications. Inspect the cutting edges for chips or damage before each use, and confirm programmed feeds and speeds are appropriate for the workpiece material and machine rigidity.