NAX1223Z Combined Needle Roller With Thrust Ball Bearing 12x21x23mmNKX12Z Combined Needle Roller With Thrust Ball NKX12Z Combined Needle Roller With Thrust Ball Bearing 12mm x 21mm x 23mm NAX1223Z Combined Needle Roller With Thrust Ball Bearing 12x21x23mm 12mm x 21mm x 23mm VXB Bearing NAX1223Z 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,