NKS40 needle roller bearings, needle roller governance (certified), needle roller bearings supplied by Linqing municipal and needle roller bearings plant. Linqing municipal and needle roller bearings plant (www.zhgzzc.com) is specialized in "physical ring type needle roller bearings, bearing roller type needle roller bearings, needle roller bearings curve wheel class," the enterprise, the company adhering to the "integrity management , hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr.Song. The company has a sophisticated production equipment, perfect testing means of needle roller bearings, strong technical force, "to the credibility of development NK38 / 30 needle roller bearings, the quality of survival" for the purpose. Bearing in the work, which will be due to changes in the size and structure of the material changes. This shift by temperature, time and stress influence. In order to avoid work, due to structural changes in the material and is not allowed to change the size of NK38 / 20 needle roller bearings, bearing materials must be special heat treatment. Auxiliary rollers, the outer diameter of the secondary sleeve shaft diameter should be smaller than 0.1-0.3mm. When installing NK40 / 30 needle roller bearings, bearing outer ring first surface coated with grease, put the needle in the abutting surface mount (the last one into the needle should be a gap), then put in place of the journal or auxiliary roller bearing inner ring is pushed into the outer sleeve or the auxiliary holes, and make the end face of the shaft aligned with mounting surface or end surface of the bearing inner ring mounted on the shaft, and then use a hammer press or hand pressure.