Some have been lubricated bearing itself, called pre-lubricated bearings Needle roller bearings F3216, while most of the bearing lubricant, otherwise at high speed needle bearings F354325, due to the friction will not only increase energy consumption, even worse, it is easy to damage the bearing, such as motor bearing no consequences is simply not working. Since the shaft needle bearing F354316 possible motion in any direction, and the motor work requirements shaft only rotation. DF - IR inner ring (the ring) after heat treatment and precision machining, dimensional tolerances and geometrical precision in line with national standards, the inner ring raceway surface is generally a guide chamfered ends for installation. It applies to the shaft can not be heat treated, not directly as a raceway occasions. The inner ring and without inner ring needle roller bearings with reach normal operating clearance when in use. Needle roller bearings F303832, needle roller bearings, needle roller by LINQing municipal governance and needle roller bearings plant. Linqing municipal and needle roller bearings plant (www.zhgzzc.com) (www.zhgzzc.net) strong, credible, in other industries, Liaocheng accumulated a large number of loyal customers. The company better work attitude and constantly improve governance and innovative ideas will lead the needle into the brilliant and you work for a better future!