Accupro 12178821 Square End Mill 5/8 in 2 Flute Solid Carbide

Product Description

The ACCUPRO 12178821 is a 2-flute solid carbide square end mill designed for precision milling in metalworking and machining applications. Built from micrograin solid carbide, it delivers consistent edge retention and wear resistance across a range of ferrous and non-ferrous materials. The nACRo coating reduces friction and extends tool life in high-speed cutting conditions. With a 40-degree helix angle and right-hand spiral flute geometry, the tool promotes efficient chip evacuation and smooth cutting action. The centercutting design allows for direct plunge entry into the workpiece. This end mill suits CNC machining centers and manual mills operated by machinists and tool-and-die professionals.

This end mill is suited for slotting, profiling, and contouring operations on machining centers in job shop, production, and maintenance environments. The 5/8-inch diameter and 2-1/8-inch length of cut make it a capable choice for moderate-depth passes in steel, stainless, cast iron, and aluminum. Its solid carbide construction and nACRo finish make it well-matched to dry cutting or minimum-quantity lubrication setups where heat and abrasion resistance are priorities.

Key Features

• Micrograin solid carbide construction for superior hardness and edge retention
• nACRo finish reduces cutting friction and extends tool life in high-heat applications
• 40-degree helix angle promotes smooth chip flow and reduced chatter
• Centercutting capable — allows direct plunge milling without pre-drilling
• Right-hand cut, right-hand flute geometry compatible with standard CNC spindle direction
• Consistent tolerances: mill diameter +0.000 / -0.002 inches, shank diameter -0.0001 / -0.0004 inches

Compatibility

Designed as an OEM-style replacement and standard-fitment end mill for 5/8-inch collets and end mill holders on CNC machining centers and manual vertical mills accepting a 5/8-inch straight shank.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before securing the shank. Use an appropriate collet or end mill holder rated for the 5/8-inch shank diameter and torque the retention mechanism per the tool holder manufacturer specifications. Verify runout with a dial indicator after installation before beginning a cutting pass.