Accupro 95170364 Corner Radius End Mill 1/4 in 4 Flute

Product Description

The ACCUPRO 95170364 is a solid carbide corner radius end mill designed for precision milling in ferrous and hardened materials. It features a 1/4 inch cutting diameter and a 0.0300 inch corner radius that reduces stress concentrations at part edges and extends tool life compared to square-end geometry. The AlCrTiN physical vapor deposition (PVD) coating provides high heat and oxidation resistance, making this tool well-suited for dry cutting and high-speed machining applications. With 4 flutes, a variable index, and a variable helix design, it improves chip evacuation and reduces harmonic chatter during cuts. Machinists, tool-and-die professionals, and CNC operators install this tool in machining centers and manual milling setups.

This end mill is suited for short-reach profiling, slotting, and contouring operations where a tight corner radius and controlled surface finish are required. The short flute length of 5/16 inch (0.3125 inches) and 2 inch overall length make it appropriate for applications requiring rigidity and minimal deflection. It is centercutting, allowing plunge entry directly into the workpiece. The right-hand flute direction and right-hand cutting direction are standard for conventional CNC milling setups. It is sold as a single-end tool and ships in individual packaging.

Key Features

• 0.0300 inch corner radius reduces edge stress and improves part finish at workpiece corners
• AlCrTiN PVD coating provides oxidation and heat resistance for dry and high-speed cutting
• Variable index and variable helix geometry reduce chatter and improve surface finish
• Centercutting design allows direct plunge entry without pre-drilling
• Micrograin solid carbide substrate delivers rigidity and wear resistance
• Right-hand cut, right-hand spiral flutes suit standard CNC milling spindle direction

Compatibility

Designed as a direct-mount replacement or standard tooling selection for CNC machining centers and manual mills using a 1/4 inch straight-cylindrical shank with h6 shank diameter tolerance, compatible with ER collets, end mill holders, and similar toolholding systems sized for 1/4 inch shanks.

Installation Notes

Installation is performed by machinists or CNC setup technicians using a compatible collet chuck or end mill holder sized for a 1/4 inch shank diameter. Ensure the machine spindle is fully stopped and locked before inserting or removing the tool. Confirm runout does not exceed the specified TIR maximum of 0.0067 inches after seating in the holder to maintain dimensional accuracy and tool life. Follow the machine tool manufacturer and shop safety protocols when setting speeds and feeds for carbide end mills.