Accupro 12178789 Square End Mill 9/32 in 2 Flute Carbide

Product Description

The ACCUPRO 12178789 is a solid carbide square end mill designed for precision milling operations in metal and hard-material applications. It features a 9/32-inch (0.2812-inch) cutting diameter, a 1/2-inch length of cut, and a 5/16-inch shank diameter, with a 2-inch overall length. The two-flute spiral design with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting performance. The nACRo finish provides enhanced wear resistance for extended tool life in demanding materials. This end mill is centercutting, allowing plunge entry, and is ground from micrograin carbide stock for consistent edge integrity.

This end mill is suited for machining ferrous and non-ferrous metals, alloys, and hardened materials in CNC milling centers and manual mills. The right-hand cut and right-hand flute configuration is standard for conventional spindle setups. The 5/16-inch shank fits common collet and end mill holder sizes used in both production and toolroom environments. It is typically installed by machinists and tool and die professionals in job shop, production, and maintenance machining applications.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• nACRo finish for extended tool life in hard and abrasive materials
• 40-degree helix angle promotes efficient chip flow and reduced cutting forces
• Centercutting design allows direct plunge entry without a pilot hole
• Two-flute spiral geometry balances chip clearance and edge strength
• Right-hand cut and right-hand flute for standard CNC and manual mill setups

Compatibility

Designed for use in standard 5/16-inch collets, end mill holders, and tooling chucks on CNC machining centers and manual vertical mills.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully into the collet or holder to the recommended grip depth and torque the retention hardware per the holder manufacturer specification. Verify runout with a dial indicator before beginning the cut, as excessive runout reduces tool life and surface finish quality.