Accupro 12178690 Square End Mill 1/4 in 7 Flute Solid Carbide

Product Description

The ACCUPRO 12178690 is a 7-flute solid carbide square end mill designed for high-efficiency milling in demanding machining applications. It features a 1/4 inch cutting diameter, a 3/4 inch length of cut, and a 2-1/2 inch overall length. The AlTiN finish provides heat resistance and extended tool life at elevated cutting speeds. A 37.5-degree spiral helix angle promotes smooth chip evacuation and reduces cutting forces. The micrograin carbide substrate delivers hardness and wear resistance suited for ferrous and non-ferrous materials. This end mill is a center-cutting design, allowing direct plunge entry into the workpiece.

This end mill is intended for use in CNC machining centers and manual mills across job shop, production, and tool-and-die environments. The 7-flute configuration increases the number of cutting edges in contact with the workpiece, supporting higher feed rates and improved surface finish in finish-milling passes. Right-hand cut and right-hand flute geometry follow standard spindle conventions. Typical applications include profiling, slotting, and finishing operations on steel, stainless, cast iron, and hardened alloys where tool rigidity and surface quality are priorities.

Key Features

• 7-flute design supports higher feed rates and improved surface finish compared to 4-flute tools
• AlTiN coating provides thermal and oxidation resistance for dry and high-speed cutting
• 37.5-degree helix angle promotes efficient chip flow and reduced radial cutting forces
• Center-cutting geometry allows plunge milling without a pre-drilled entry point
• Micrograin solid carbide substrate for superior hardness and edge retention
• Mill diameter tolerance of +0.000 / -0.002 inches for precise fit and consistent cut quality

Compatibility

Designed as a standard 1/4 inch shank square end mill compatible with any milling machine or machining center collet, end mill holder, or toolholder accepting a 1/4 inch straight shank.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank to the full recommended insertion depth in the holder to prevent tool pullout under load. Verify runout with a dial indicator after clamping before beginning a cut.