For only drawn cup needle roller bearings, since the outer walls were very thin, do not hand hammer installation, needle roller bearings NA4903, pressed into the press should be used. Because the hand hammer needle bearing outer ring produce local deformation. Playing, needle roller bearings NKI17 / 20, uneven pressure, easy to make with needle bearings in the journal slowly move inward, needle bearings, roller auxiliary or secondary sleeve will slowly withdraw, until attached to the work So far location. Rely on the bearing inner ring shoulder and interference to achieve axial fixation. It applies to both ends of the fixed support structure. Needle roller bearing inner ring by the shaft shoulder and lock nut to achieve axial fixation. Friction surface temperatures on the rise, affecting the bearing sliding velocity V is much larger than the impact force P. Needle roller bearings NKIS17 | governance and needle (Online) | needle roller bearings supplied by Linqing municipal and needle roller bearings plant. Linqing municipal and needle roller bearings plant (www.zhgzzc.com) (www.zhgzzc.net) Shandong Liaocheng, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. Needle in governance and leadership with the staff warmly welcome all inquiries negotiations to create a better future governance and needle.