Bearing, 6004-2RS

The 6004-2RS dimensions match the spec sheet exactly, so it dropped right into the spindle housing with zero fuss. My micro mill's headstock runs quiet now, and the sealed rubber shields keep the dust out during aluminum jobs.

My spindle was getting noisy and after checking the spec sheet I saw this 6004-2RS is 20mm ID by 42mm OD, which matched perfectly. The shielded design kept the grease in place during installation, and the mill runs smoother than it has in months.

Replaced the old spindle bearing on my micro mill and the 20mm bore slid right onto the shaft with zero play. Runs smooth and quiet, and the 12mm width matches the original exactly.