Accupro 12181550 Corner Radius End Mill 3/4 in 2 Flute Altin

Product Description

The ACCUPRO 12181550 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining applications. It features a 3/4 inch diameter, a 1-1/2 inch length of cut, and a 1/8 inch (0.1250 inch) corner radius that reduces stress concentrations and extends tool life on radiused-pocket and contour work. The micrograin solid carbide substrate is coated with AlTiN (aluminum titanium nitride) for high heat resistance and wear performance in hardened steels, stainless, and high-temp alloys. This is a single-end, centercutting tool with a right-hand cutting direction and 40-degree helix, making it suitable for both peripheral and plunge entry cuts.

This end mill is used in CNC machining centers and manual vertical mills across job shops, tool-and-die, aerospace, and general precision manufacturing environments. It is well-suited for profiling, slotting, and pocket milling where a radiused corner is required to reduce notch stress in the finished workpiece. The 4 inch overall length and 3/4 inch shank diameter fit standard ER and end mill holders commonly found in production and prototype machining setups.

Key Features

• Solid micrograin carbide substrate for rigidity and wear resistance in ferrous and non-ferrous materials
• AlTiN coating provides high oxidation resistance and extends tool life in dry and semi-dry cutting conditions
• 1/8 inch corner radius reduces edge chipping and stress risers on radiused pockets and contour profiles
• 40-degree helix angle promotes smooth chip evacuation and reduces cutting forces
• Centercutting geometry allows direct plunge entry without pre-drilling
• Right-hand flute direction and right-hand cutting for standard CNC spindle rotation

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for CNC machining centers and vertical mills accepting a 3/4 inch shank end mill holder or collet chuck.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer torque specifications for the collet or end mill holder in use. Ensure the spindle is fully stopped and locked out before loading or removing the tool. Verify runout at the tool tip after seating to confirm proper holder engagement. Follow applicable shop safety and machine guarding procedures during setup and operation.