Accupro 12179305 Ball End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The ACCUPRO 12179305 is a solid carbide ball end mill designed for precision milling operations in ferrous and high-temperature alloy materials. With a 1/4 inch cutting diameter and a 1-1/2 inch length of cut, it handles deep-cavity profiling, contour milling, and finish passes where a tight radius and accurate floor geometry are required. The 4-flute, right-hand spiral configuration paired with a 40-degree helix angle promotes efficient chip evacuation and stable cutting. An nACRo coating provides high-temperature oxidation resistance and reduces friction, extending tool life in demanding applications. Machinists and tool-and-die professionals install this end mill in CNC machining centers and manual knee mills.

This end mill is suited for milling operations on hardened steels, stainless alloys, cast iron, and similar materials where coating performance is critical. The single-end design concentrates rigidity in the cutting zone, making it appropriate for finish milling, die work, and contour passes on 3-axis and multi-axis CNC equipment. The 6 inch overall length provides clearance for deeper setups while the 1/4 inch shank diameter fits standard ER collet chucks and end mill holders commonly found in job shop and production environments.

Key Features

• 1/4 inch cutting diameter with mill diameter tolerance of +0.000 / -0.002 inches for accurate finish dimensions
• 1-1/2 inch length of cut supports cavity and contour milling with extended reach into the workpiece
• 4-flute, right-hand spiral geometry with 40-degree helix angle for stable cutting and efficient chip flow
• nACRo coating delivers oxidation resistance and reduced tool-to-chip friction in high-temperature cuts
• Micrograin solid carbide substrate provides hardness and wear resistance throughout tool life
• Single-end design with 6 inch overall length allows clearance in deep-setup configurations

Compatibility

Designed as a direct-fitment solid carbide ball end mill for use in standard 1/4 inch ER collet chucks, shrink-fit holders, and end mill holders on CNC machining centers and manual mills.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for tool holding and runout tolerances. Power down and lock out the spindle before inserting or removing the end mill from the holder. Confirm shank seating depth and holder torque according to the collet or holder manufacturer specifications before operation. Shank diameter tolerance is -0.0001 / -0.0004 inches — verify holder bore condition to maintain runout within acceptable limits.