Accupro 310085 Corner Radius End Mill 1/4 in 4 Flute Carbide

Product Description

The ACCUPRO 310085 is a solid carbide corner radius end mill designed for precision milling in demanding machining environments. It features a 1/4 inch diameter, a 3/8 inch length of cut, and a 2 inch overall length. The AlCrTiN coating provides heat and wear resistance suited for high-speed cutting of hardened steels, stainless, and other difficult materials. With 4 flutes, a right-hand cutting direction, and a variable index design, this end mill delivers smooth chip evacuation and reduced chatter. It is centercutting-capable, allowing plunge entry without a pre-drilled pilot hole. Machinists and CNC operators in tool and die, aerospace, and general metalworking shops are the primary users.

This end mill is appropriate for finishing and semi-finishing passes where a radiused corner profile is required to reduce stress concentrations at the base of a feature. The 0.030 inch corner radius produces a controlled blend between the floor and wall of a pocket or slot. The straight cylindrical shank accepts standard ER collets and end mill holders with a 1/4 inch bore. The 38 degree helix angle promotes efficient chip flow on ferrous and non-ferrous materials in both horizontal and vertical machining centers.

Key Features

• AlCrTiN coating for extended tool life in high-heat cutting applications
• Solid micrograin carbide substrate for rigidity and edge retention
• 0.030 inch corner radius reduces part stress and extends workpiece life
• Variable index flute spacing reduces harmonic vibration and chatter
• Centercutting design allows direct plunge milling without pilot entry
• 38 degree helix angle promotes efficient chip evacuation

Compatibility

Designed for use in standard 1/4 inch straight-bore end mill holders, ER collet chucks, and hydraulic tool holders on vertical and horizontal machining centers requiring a corner radius end mill with a straight cylindrical shank.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the full recommended gauge depth in the holder and torque the retention mechanism to the tool holder specification. Verify runout with a dial indicator before beginning the cut, as excessive runout will accelerate edge wear on carbide tooling.