NKX12Z Combined Needle Roller With Thrust Ball Bearing 12mm x 21mm x 23mm - Machined TypeNKX12Z Combined Needle Roller With Thrust Ball NKX12Z Combined Needle Roller With Thrust Ball Bearing 12mm x 21mm x 23mm NKX12Z Combined Needle Roller 12mm x 21mm x 23mm VXB Bearing NKX12Z combined Needle roller bearings with a thrust bearing. They can accommodate both radial and axial loads. They are particularly suitable for applications where other types of locating bearing arrangements occupy too much space, or where the axial loads are too heavy,