Accupro 12182809 Square End Mill 1/4 in 4 Flute Carbide Altin

Product Description

The ACCUPRO 12182809 is a 4-flute, solid carbide square end mill designed for precision milling in demanding shop environments. With a 1/4 inch cutting diameter and a stub-length profile, this tool delivers rigidity and reduced deflection in short-reach applications. The AlTiN (aluminum titanium nitride) coating improves heat resistance and tool life when cutting ferrous and hardened materials at elevated speeds. A 40-degree helix angle promotes smooth chip evacuation and reduces cutting forces. This end mill is suited for machinists, tool-and-die shops, and CNC operators working in production or prototype environments.

This end mill is designed for use in vertical machining centers, CNC mills, and manual knee mills accepting a 1/4 inch collet or end mill holder. The stub length and 3/8 inch length of cut make it well suited for slotting, profiling, and pocket milling in tighter workpiece geometries. It performs well in alloy steels, stainless steel, cast iron, and hardened materials where the AlTiN coating provides thermal protection. Right-hand cut and right-hand spiral flute geometry follow standard CNC toolpath conventions.

Key Features

• 1/4 inch cutting diameter with plus 0.000 / minus 0.002 inch tolerance
• AlTiN coating for extended tool life in ferrous and hardened materials
• 40-degree helix angle for efficient chip evacuation and reduced cutting force
• Centercutting design allows plunge entry into the workpiece
• Micrograin solid carbide substrate for hardness and wear resistance
• Right-hand cut, right-hand flute with spiral flute geometry

Compatibility

Designed as an OEM-style replacement or direct-use tooling for CNC and manual milling machines equipped with a 1/4 inch collet, ER collet chuck, or end mill holder accepting a 0.2500 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully powered down and the machine is in a safe state before loading or changing tooling. Use a calibrated torque wrench and the appropriate collet or holder to seat the shank securely, verifying runout with a dial indicator before beginning a cut. Confirm feed, speed, and depth-of-cut parameters are appropriate for the workpiece material before running the program.