Accupro 12180429 Square End Mill 1/4 in 4 Flute Carbide

Product Description

The ACCUPRO 12180429 is a 4-flute square end mill designed for precision milling in a wide range of metalworking applications. Built from micrograin solid carbide and coated with AlTiN (aluminum titanium nitride), this tool delivers high heat resistance and extended tool life in demanding cutting environments. The 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. With a 0.2500 inch cutting diameter and a 0.3750 inch length of cut, it is suited for finishing and light-to-medium roughing passes. Licensed machinists and CNC operators in job shops, manufacturing, and maintenance environments rely on this class of end mill for tight-tolerance work.

This end mill is configured for right-hand cut with right-hand spiral flutes and is centercutting, allowing plunge entry into the workpiece. The 1/4 inch shank diameter fits standard ER collet systems and compatible toolholders. The 2 inch overall length keeps the tool rigid and minimizes deflection in typical milling setups. It is well suited for steel, stainless steel, cast iron, and high-temperature alloys where AlTiN coating provides a thermal barrier at the cutting edge.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance
• AlTiN coating provides high heat resistance for dry or minimal-coolant machining
• 40-degree helix angle promotes chip evacuation and reduces cutting forces
• Centercutting geometry allows direct plunge milling
• Right-hand cut, right-hand flute configuration for standard CNC spindle use
• Tight diameter tolerances: +0.000 / -0.002 inches on mill diameter; -0.0001 / -0.0004 inches on shank diameter

Compatibility

Designed as a standard 1/4 inch shank square end mill compatible with ER collet chucks, shrink-fit holders, and other 1/4 inch bore toolholding systems used on CNC machining centers and manual mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator familiar with toolholder torque and runout requirements. Ensure the spindle and toolholder are clean and free of chips before seating the shank. Confirm collet nut torque is within the toolholder manufacturer's specification before beginning a cut. Never exceed the tool's rated depth of cut or feed rate for the workpiece material.