Accupro 12184940 Ball End Mill 0.4375 in 4 Flute Carbide

Product Description

The ACCUPRO 12184940 is a solid carbide ball end mill designed for precision milling operations in ferrous and non-ferrous materials. It carries a 0.4375-inch (7/16-inch) diameter with a 1-inch length of cut and a 4-inch overall length, placing it in the long-reach category. Four right-hand spiral flutes with a 40-degree helix angle promote efficient chip evacuation and smooth cutting action. Micrograin carbide construction provides wear resistance and edge stability under high-speed machining conditions. The uncoated finish makes it suitable for applications where coatings would be redundant or where regrinding is anticipated. This is a single-end tool with a right-hand cutting direction.

This end mill is used in CNC machining centers and manual milling machines for profiling, slotting, and contouring operations that require a ball-nose geometry. The long overall length of 4 inches supports deeper reach into pockets and cavities. It is appropriate for job shops, tool rooms, and production machining environments. The 7/16-inch shank diameter is a standard size compatible with common collet and end mill holder systems. Machinists and CNC operators handling precision metalwork are the primary users of this tool.

Key Features

• 0.4375-inch (7/16-inch) ball nose diameter with mill diameter tolerance of +0.000 to -0.002 inches
• Solid micrograin carbide construction for edge retention and rigidity
• 4 right-hand spiral flutes at a 40-degree helix angle for efficient chip removal
• Long series at 4 inches overall length with 1-inch length of cut
• Uncoated finish suitable for regrinding or dry machining applications
• Single-end design with right-hand cutting direction

Compatibility

Designed as a standard single-end ball end mill with a 7/16-inch shank diameter, compatible with collet chucks and end mill holders sized for 7/16-inch shanks in CNC and manual milling setups.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the 7/16-inch shank in a properly sized collet or end mill holder, ensuring adequate shank engagement depth per the toolholder specification. Verify spindle runout before committing to finish passes, as micrograin carbide is sensitive to vibration and interrupted cuts. Always power down and lock out the machine before changing tooling.