Accupro 12178889 Square End Mill 3/8 in 3 Flute Carbide

Product Description

The ACCUPRO 12178889 is a solid carbide square end mill designed for precision milling operations in metal-cutting and machining applications. Built from micrograin carbide stock, it runs a 3/8 inch cutting diameter with a 7/8 inch length of cut and a 2-1/2 inch overall length. The nACRo physical vapor deposition coating provides elevated hardness and heat resistance, extending tool life in demanding cuts. Three spiral flutes with a 40-degree helix angle promote efficient chip evacuation and a stable cutting action. Centercutting geometry allows plunge entry as well as peripheral milling. This tool is sized and configured for use in CNC machining centers, knee mills, and manual milling machines by machinists and toolmakers.

Typical applications include slotting, profiling, and pocket milling in ferrous and non-ferrous metals, as well as hardened alloys where a coated carbide tool is appropriate. The 3/8 inch shank diameter fits standard ER collets, milling chucks, and shrink-fit holders common in production and job-shop environments. The regular-length configuration suits most general-purpose setups without extended-reach concerns. Right-hand cut and right-hand flute geometry follow conventional spindle rotation standards.

Key Features

• 3/8 inch cutting diameter with plus 0.000 / minus 0.002 inch diameter tolerance
• nACRo coating for improved wear resistance and heat management
• 40-degree helix spiral flute for aggressive chip evacuation
• Centercutting design allows plunge milling and full-slot entry
• Micrograin solid carbide substrate for rigidity and edge retention
• Right-hand cut, right-hand flute — compatible with standard CNC and manual spindle rotation

Compatibility

Designed as an OEM-style replacement or standard-stocking solid carbide square end mill for 3/8 inch collet and chuck toolholding systems used in CNC machining centers and conventional milling machines.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down and lock out the spindle before loading or removing the tool. Seat the shank fully in the collet or chuck to the minimum recommended engagement depth per the toolholder manufacturer. Verify runout with a dial indicator before beginning a cut; excessive runout accelerates edge wear and can cause premature tool failure.