Accupro 12176908 Corner Radius End Mill 0.0781in 4 Flute

Product Description

The ACCUPRO 12176908 is a single-end corner radius end mill manufactured from micrograin solid carbide and coated with AlTiN (aluminum titanium nitride) for extended tool life in demanding cutting applications. The cutter measures 0.0781 inches in diameter with a 0.01-inch corner radius and runs four right-hand spiral flutes at a 30-degree helix angle. Centercutting geometry allows plunge entry. The AlTiN coating provides thermal resistance and hardness, making this end mill well suited for high-speed dry or near-dry machining of ferrous and hardened materials. Licensed machinists and CNC tooling specialists are the primary users.

This end mill is designed for precision profiling, slotting, and contouring operations in machining centers and CNC mills. The 0.0781-inch diameter and 0.01-inch corner radius make it appropriate for fine-detail work and tight-tolerance features where sharp inside corners must be slightly radiused to reduce stress concentration. A 0.25-inch length of cut and 1.5-inch overall length suit shallow-to-moderate depth passes in ferrous alloys, stainless steel, titanium, and similar difficult-to-machine materials. The 0.125-inch straight shank fits standard ER and collet-style toolholders commonly found in production and job-shop environments.

Key Features

• Micrograin solid carbide substrate for rigidity and wear resistance in hard materials
• AlTiN coating supports high cutting speeds and dry machining conditions
• 0.01-inch corner radius reduces chipping risk at cutting edges and part stress risers
• Four right-hand spiral flutes at 30-degree helix for efficient chip evacuation
• Centercutting design allows direct plunge entry without a pre-drilled hole
• Single-end configuration with 0.125-inch shank diameter for collet or ER toolholder use

Compatibility

Designed as an OEM-style cutting tool for use in CNC machining centers and manual mills accepting a 0.125-inch straight shank via collet, ER, or set-screw toolholders. No specific machine model compatibility was provided by the manufacturer for this part number.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully stopped and the machine in an e-stop or locked-out state. Seat the 0.125-inch shank fully into the toolholder and torque the collet nut to the toolholder manufacturer's specification — do not rely on hand-tight alone at this diameter. Verify runout with a dial indicator before production cuts, as runout beyond 0.0002 inches at this cutter diameter significantly accelerates wear. Follow your shop's established feeds-and-speeds parameters for the workpiece material; do not extrapolate from larger-diameter end mill data without adjustment.