Accupro 12183018 Corner Radius End Mill 1/4 in 4 Flute Altin

Product Description

The ACCUPRO 12183018 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking applications. With a 1/4 inch mill diameter and a 0.045 inch corner radius, it produces smooth, radiused inside corners that reduce stress concentrations in machined parts. The AlTiN coating delivers high heat resistance and extended tool life when cutting ferrous metals and hardened steels. Four right-hand spiral flutes with a 40-degree helix angle promote efficient chip evacuation and a fine surface finish. This is a centercutting, single-end tool with a long flute configuration, suited for slotting, profiling, and plunge operations.

This end mill is well suited for CNC machining centers and manual mills in job shops, tool rooms, and production environments. The 1-1/8 inch length of cut accommodates moderate-depth passes, while the 3 inch overall length allows clearance in many standard setups. The 1/4 inch shank diameter fits common collet and end mill holder systems. Machinists working with steel, stainless, cast iron, and similar materials will find the AlTiN coating and micrograin carbide substrate a reliable combination for extended run times at elevated cutting speeds.

Key Features

• Solid micrograin carbide substrate for rigidity and wear resistance
• AlTiN coating for high-temperature performance in ferrous and hardened materials
• 0.045 inch corner radius reduces stress risers in machined corners
• 40-degree helix angle promotes smooth chip flow and surface finish
• Centercutting geometry enables direct plunge entry
• Right-hand cut and right-hand flute direction for standard CNC and manual mill setups

Compatibility

Designed as a replacement or direct-use corner radius end mill compatible with 1/4 inch collets, shrink-fit holders, and end mill holders on standard CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully in the holder to the recommended gauge depth and torque the collet nut to the holder manufacturer specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates corner radius wear.