Accupro 12183986 Ball End Mill 0.3281 in 2 Flute Carbide

Product Description

The ACCUPRO 12183986 is a solid carbide ball end mill designed for precision milling operations in metal fabrication and machining shops. With a 0.3281-inch cutting diameter and a 0.875-inch length of cut, it handles contoured surfaces, slots, and profiling passes on ferrous and non-ferrous materials. The 2-flute geometry and 40-degree helix angle promote chip evacuation and reduce cutting forces, making this tool well-suited for both roughing and finishing passes in tight geometries. Micrograin carbide construction delivers edge retention and rigidity in demanding cutting conditions. This tool is installed and operated by machinists and CNC programmers in production and job-shop environments.

This end mill is used in CNC machining centers and manual knee mills for 3D contouring, die and mold work, and radius-floor pocketing. The 3/8-inch shank diameter fits standard ER and end mill holders. Its 2.5-inch overall length keeps overhang minimal, improving rigidity in close-tolerance setups. The uncoated finish makes it a cost-effective option for aluminum, brass, and other non-ferrous materials where coatings are not required or where re-grinding is planned.

Key Features

• 0.3281-inch (21/64-inch) ball nose cutting diameter for contour and radius milling
• Micrograin solid carbide construction for edge retention and rigidity
• 40-degree right-hand spiral helix promotes efficient chip evacuation
• 2-flute geometry balances chip clearance with cutting edge strength
• Uncoated finish suited for non-ferrous materials and re-grindable applications
• Single-end design with 3/8-inch shank for standard toolholder compatibility

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers and manual mills accepting a 3/8-inch shank end mill holder or collet chuck.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the machine spindle is fully powered down and locked out before loading or unloading the tool. Seat the shank fully into the holder to the recommended gauge-line depth and torque the drawbar or collet nut according to the toolholder manufacturer specifications. Verify runout with a dial indicator before initiating a cutting pass, particularly for close-tolerance profiling work.