Accupro 12178754 Square End Mill 19/64 in 2 Flute Carbide

Product Description

The ACCUPRO 12178754 is a solid carbide square end mill designed for precision milling in ferrous and non-ferrous metals, alloys, and hardened materials. Built from micrograin carbide stock, it delivers a 19/64 inch (0.2969 inch) cutting diameter with a 3/4 inch length of cut and a 40-degree helix angle. The nACRo physical vapor deposition coating reduces friction and extends tool life in high-heat cutting environments. With two spiral flutes and a right-hand cut and right-hand flute configuration, it is suited for general-purpose slotting, profiling, and peripheral milling operations. Machinists and toolroom professionals working with CNC mills and manual knee mills are the primary users.

This end mill fits standard milling applications where a 5/16 inch shank diameter is required. The centercutting geometry allows direct plunge entry without a pre-drilled pilot hole, making it practical for pocketing and interpolation work. At 2-1/2 inches overall length, it maintains rigidity while reaching into moderate-depth features. The 40-degree helix promotes smooth chip evacuation and reduced chatter, which is particularly useful when milling stainless steel, alloy steel, and similar work materials at elevated spindle speeds.

Key Features

• Micrograin solid carbide construction for hardness and wear resistance
• nACRo coating for thermal protection and reduced built-up edge
• 40-degree spiral flute helix for efficient chip evacuation
• Centercutting design enables direct plunge milling
• Right-hand cut, right-hand flute — compatible with standard spindle rotation
• Mill diameter tolerance of +0.000 / -0.002 inches for consistent fit and finish

Compatibility

Designed as a direct-fit replacement or new-stock option for CNC machining centers and manual milling machines that accept a 5/16 inch straight shank end mill. No specific OEM system compatibility was stated in the product data.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down and lock out the spindle drive before seating or removing the tool from its holder. Use a properly sized collet or end mill holder matched to the 5/16 inch shank diameter to prevent runout. Inspect the shank and collet bore for chips or burrs before clamping, as contamination directly affects concentricity and tool life.