... steel material 2)Low noise, low vibration 3)Low price,good quality Needle roller bearing 1)Chrome steel material2)Low noise, low vibration3)Low ... price,good quality 4)Demension(d,D,B): 40mm,68mm,15mmsimple in strucure ... motors, general machinery, industrial gearboxes, pumps, agricultural machinery, etc. Needle roller bearing