Identified by voice, you need to experience. Must be able to identify adequate training to reach the voice bearing and non-bearing sound. For this reason, because as far as possible by professional people to carry out this work. Attached to the shell can clearly hear the sound by listening rod bearing. This method belongs to the working temperature by comparison method to identify limited to little change in the operating state of the occasion. So NA49115 needle roller bearings, the temperature must be continuously recorded. When faulty needle roller bearings, the temperature will not only rise, there will be irregular changes. The method of voice recognition method and use appropriate. With thin and long needle bearing roller (roller length of 3 to 10 times the diameter of the needle bearing NA6915 diameter generally not more than 5mm) NKI75 / 25 needle roller bearings, radial structure is compact and therefore, its diameter size and load capacity and other types of bearings, minimum diameter, especially for installation dimensions restricted support NA49115 needle roller bearings Needle roller bearings _ _ governance provided by the radial needle roller and needle bearings Linqing municipal plant. Linqing municipal and needle roller bearings plant (www.zhgzzc.com) 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 you hand needle and into the brilliant, for a better future!