Accupro 39781083 Ball End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The ACCUPRO 39781083 is a solid carbide ball end mill designed for precision milling operations in metalworking and machining applications. With a 1/4 inch diameter and a 0.2130 inch length of cut, this single-end tool delivers accurate ball-nose profiles for contouring, slotting, and finishing passes. The four-flute geometry with variable index improves chip evacuation and reduces chatter. An AlTiCrN coating provides heat resistance and extended tool life when cutting ferrous and hardened materials. Machinists and CNC operators working in job shops, tool rooms, and production environments rely on this style of end mill for tight-tolerance work.

This ball end mill is suited for milling steel, stainless steel, cast iron, and similar materials in both manual and CNC machining centers. The 1/4 inch shank diameter fits standard collets and end mill holders. With an overall length of 2.5 inches and a neck length of 1.125 inches, it provides reach for pocketing and contour work while maintaining rigidity. The single-end design means the cutting end is fixed, optimizing balance and concentricity for finish milling operations.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding materials
• AlTiCrN coating improves heat resistance and extends tool life in ferrous cutting
• Four-flute design with variable index reduces harmonics and chatter during cuts
• 0.2130 inch length of cut suited for shallow profiling and contouring passes
• 1.125 inch neck length provides access to deeper pockets while maintaining stability
• Single-end configuration optimizes balance and runout performance

Compatibility

Designed for use in CNC machining centers and manual mills equipped with standard 1/4 inch collets or end mill holders accepting a 1/4 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or holder to the recommended insertion depth and torque the retention nut according to the toolholder manufacturer specifications. Inspect the cutting edges for chips or damage before use and confirm runout with a dial indicator where tolerance is critical.