1pcs UTE 7001 7001C H7001C 2RZ P4 12x28x8 Sealed Angular Contact Bearings Engraving Machine Speed Spindle Bearings CNC Bearing 1 pair axk 7001 7001c 2rz p4 db a 12x28x8 12x28x16 sealed angular contact bearings speed spindle bearings cnc abec 7