Accupro 12183058 Corner Radius End Mill 3/8 in 4 Flute

Product Description

The ACCUPRO 12183058 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining applications. Built from micrograin solid carbide and finished with a TiCN (Titanium Carbonitride) coating, it delivers extended tool life and reduced friction in demanding cuts. The cutter features a 3/8 inch diameter, a 1-1/8 inch length of cut, and a 0.01 inch corner radius that protects workpiece edges and reduces stress concentrations at corners. With 4 right-hand spiral flutes and a 40-degree helix angle, this end mill provides efficient chip evacuation and smooth surface finishes on ferrous and non-ferrous materials.

This end mill is suited for slot milling, profile milling, and peripheral finishing where a controlled corner radius is required. The centercutting geometry allows direct plunge entry, giving machinists flexibility in toolpath programming. The long-length configuration with a 3 inch overall length and 3/8 inch shank diameter fits standard ER and side-lock toolholders commonly found on CNC machining centers and manual knee mills. It is a single-end tool intended for right-hand cutting operations in job shop, production, and tool-and-die environments.

Key Features

• Micrograin solid carbide substrate for hardness and wear resistance in steel and alloy materials
• TiCN coating reduces friction and heat buildup, extending tool life compared to uncoated carbide
• 0.01 inch corner radius reduces edge chipping on workpieces and lowers stress at milled corners
• 4-flute, 40-degree right-hand spiral geometry promotes efficient chip evacuation and smooth finishes
• Centercutting design permits direct plunge milling without a pre-drilled entry hole
• Long-length configuration provides added reach for deeper pockets and stepped features

Compatibility

Designed as an OEM-style solid carbide corner radius end mill for use in standard 3/8 inch collet chucks, ER collet systems, and side-lock toolholders on CNC and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's toolholder torque and runout specifications. Ensure the spindle is fully stopped and the machine is in a safe state before changing or seating the tool. Verify shank seating depth and runout with a dial indicator before beginning a cut. Shank diameter tolerance is -0.0001 to -0.0004 inches, so use a clean, undamaged collet to maintain concentricity.