Accupro 12179290 Ball End Mill 3/8 in 4 Flute Carbide

Product Description

The ACCUPRO 12179290 is a single-end ball end mill designed for precision milling of contoured surfaces, cavities, and 3D profiles in ferrous and hardened materials. The solid micrograin carbide construction provides rigidity and wear resistance well beyond standard high-speed steel tooling. With a 3/8 inch cutting diameter, 4-flute geometry, and a 40-degree right-hand helix, this end mill delivers high chip evacuation rates and smooth surface finishes in demanding cutting conditions. The nACRo coating adds thermal protection and lubricity, extending tool life in high-temperature alloy and stainless steel applications. It is installed and used by machinists and tooling professionals in CNC machining centers and manual mills.

This ball end mill suits a wide range of applications including die and mold work, aerospace component profiling, and general-purpose contouring in a shop or manufacturing environment. The 1-3/4 inch length of cut supports moderate-depth cavity work, while the 4-inch overall length allows reach into recessed features. The 3/8 inch shank diameter fits standard collet chucks and end mill holders commonly found in vertical and horizontal machining centers. Right-hand flute direction and right-hand cutting orientation make this a straightforward drop-in for conventional CNC programs.

Key Features

• Solid micrograin carbide construction for superior rigidity and edge retention
• nACRo coating provides thermal resistance and reduced friction in hard and abrasive materials
• 40-degree helix angle promotes aggressive chip evacuation and smooth cutting action
• 4-flute design balances chip load capacity with finish quality
• Single-end configuration with ball nose geometry for contouring and 3D surface work
• Mill diameter tolerance of +0.000/-0.002 inches and shank tolerance of -0.0001/-0.0004 inches for consistent fit

Compatibility

Designed as a direct-fit replacement for standard 3/8 inch shank ball end mill tooling in CNC machining centers and manual mills accepting ER collet chucks or end mill holders with a 3/8 inch bore.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and locked before inserting or removing tooling. Use a calibrated torque wrench on collet nuts to avoid over-tightening, which can damage the shank or collet. Verify runout with a dial indicator after seating to confirm proper tool engagement before beginning a cut.