Accupro 12178725 Corner Radius End Mill 3/4 in 7 Flute

Product Description

The ACCUPRO 12178725 is a 7-flute solid carbide corner radius end mill designed for high-performance milling in ferrous and hardened materials. It features an AlTiN coating that extends tool life under high heat and dry cutting conditions. The 0.03-inch corner radius reduces stress concentration at the cutting edge, making it well-suited for semi-finishing and finishing passes where edge sharpness and profile accuracy are critical. Variable index flute spacing reduces harmonic chatter during aggressive cuts. With a 3/4-inch diameter and 2.25-inch length of cut, it handles deep-cavity and shoulder milling across a range of CNC machining operations.

This end mill is used in vertical and horizontal CNC machining centers across job shops, production floors, and tool-and-die operations. The single-end, centercutting design allows plunge entry and flexible toolpath strategies including slot milling, peripheral cutting, and ramping. A 37-degree helix angle promotes efficient chip evacuation and smooth surface finishes. The micrograin carbide substrate supports use in steels, stainless, cast iron, and high-temperature alloys. It is appropriate for applications where corner geometry must be held to tight tolerances.

Key Features

• 7-flute geometry increases feed rates and improves surface finish over lower-flute-count tools
• AlTiN coating provides high heat resistance for dry and near-dry cutting in ferrous materials
• 0.03-inch corner radius with a tolerance of plus or minus 0.0015 inches for precise profile control
• Variable index flute spacing reduces vibration and chatter at high spindle speeds
• Centercutting design enables direct plunge entry without a pre-drilled pilot hole
• Micrograin solid carbide substrate for rigidity and edge retention in hard materials

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers using 3/4-inch collets, end mill holders, or shrink-fit toolholders with a 3/4-inch bore.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Use a torque-rated tool holder appropriate for 3/4-inch shank diameters and verify runout with a dial indicator after installation. Do not exceed the tool manufacturer-recommended depth of cut or axial engagement for the material being machined.