Accupro 12178935 Square End Mill 1/4 in 3 Flute Carbide

Product Description

The ACCUPRO 12178935 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. Built from micrograin carbide stock, it delivers the rigidity and edge retention that high-speed cutting demands. The tool features a 3-flute spiral configuration with a 40-degree helix angle and an nACRo coating, which reduces friction and improves wear resistance in demanding materials. With a 0.25-inch mill diameter and a 1.5-inch length of cut, it handles slotting, profiling, and peripheral milling at moderate depths. Machinists and CNC operators are the primary users of this tool in production and job-shop environments.

This end mill is suited for ferrous and non-ferrous material removal on CNC machining centers and manual mills. The centercutting geometry allows direct plunge entry without a pre-drilled hole. Right-hand cut and right-hand flute direction are standard for conventional spindle operation. The 0.25-inch shank fits standard ER collet chucks, end mill holders, and Weldon-style tool holders. The 4-inch overall length provides clearance for moderate-depth fixtures and workholding setups without sacrificing rigidity.

Key Features

• Micrograin solid carbide construction for high edge retention and resistance to deflection
• nACRo coating reduces friction and extends tool life in harder workpiece materials
• 40-degree helix angle promotes smooth chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge milling without pilot drilling
• 3-flute spiral geometry balances chip room with surface finish quality
• Right-hand cut and right-hand flute for standard CNC spindle compatibility

Compatibility

Designed as a direct-fit replacement for standard 1/4-inch shank square end mill applications using ER collet chucks, end mill holders, or Weldon-style tool holders on CNC machining centers and manual vertical mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the spindle fully stopped and the machine in a safe, locked-out state. Ensure the shank is clean and free of chips before seating in the tool holder, and torque the collet or set screw to the tool holder manufacturer specification. Confirm runout with a dial indicator before beginning a cut. Do not exceed the tool manufacturer recommended depth-of-cut or feed rate for the workpiece material.