Accupro 12183074 Corner Radius End Mill 3/8 in 4 Flute Altin

Product Description

The ACCUPRO 12183074 is a solid carbide corner radius end mill designed for precision milling operations in metalworking and machining environments. It features a 3/8 inch diameter with a 0.09 inch corner radius, producing a consistent radius blend where walls meet floors in milled pockets and profiles. The 4-flute, right-hand spiral geometry with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. An AlTiN (aluminum titanium nitride) coating provides thermal resistance and hardness at elevated cutting temperatures, extending tool life in ferrous and hardened materials. This tool is installed and operated by machinists and CNC programmers in production and job-shop environments.

This end mill is suited for finish and semi-finish milling of ferrous metals, alloy steels, and hardened materials where corner radius geometry is required to reduce stress concentration in milled features. The long-length configuration, with a 1-1/8 inch length of cut and 3 inch overall length, supports deeper axial engagement in pockets and slots. The centercutting design allows plunge entry directly into the workpiece. The 3/8 inch shank diameter is compatible with standard collet and end mill holder systems used on vertical machining centers and CNC mills.

Key Features

• 0.09 inch corner radius for consistent radius blending at pocket floors and walls
• AlTiN coating for high-temperature wear resistance in ferrous and hardened materials
• 4-flute right-hand spiral with 40-degree helix for efficient chip flow and surface finish
• Centercutting geometry allows direct plunge milling without pre-drilling
• Micrograin solid carbide construction for rigidity and edge retention
• Single-end configuration with long-length reach for deeper pocket applications

Compatibility

Designed as an OEM-style replacement or standard tooling selection for 3/8 inch collets and end mill holders on CNC vertical machining centers and manual knee mills requiring a corner radius end mill with a 3/8 inch shank diameter.

Installation Notes

Installation is performed by a machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or holder to the recommended grip depth and torque the retention mechanism per the holder manufacturer specification. Verify runout with a dial indicator before cutting to confirm proper seating.