Diameter of magnet wire= 0.5mm Number of turns of armature winding per slot = 28 turns The Shaft is 2mm knurl shaft Note I need Ball-bearing or oil bearing but sintetic materials and not Brass

It's 6V load voltage but I don't know this parameter, I use a Mabuchi RK-370-SD-5028 , I have disassembly this motor and the Diameter of magnet wire= 0.5mm Number of turns of armature winding per slot = 28 turns and the Shaft is 2mm knurl shaft