1.9mm Metric Ball End Mill

The 1.9mm ball nose cut through some hardened steel test pieces with zero chatter, which I didn't expect at this size. The spherical profile leaves a smooth finish that saves me from secondary sanding on tiny mold details.

I was pleasantly surprised by how cleanly this 1.9mm ball end mill cuts aluminum without chattering—the spherical profile leaves a smooth finish on tiny fillets. It handled my brass prototype details perfectly, and the 1.9mm size is just right for those tight corners.

Finally a ball end mill that fits my CNC's smaller collets without needing adapters. The spherical cutting profile leaves a nice smooth finish on aluminum, even at moderate speeds.