Ensure that they meet the journal (transmission parts assembly journal) for bearing journal (journal bearing assembly) of coaxial, shaft parts is generally mutual positional accuracy requirements shaft parts, followed by the face and the axis for positioning The verticality there are certain requirements. These requirements are formulated based on the work performance of the shaft, on the part of the legend position tolerances. General accuracy of the shaft, with the journal bearing journal radial runout is generally 0.01 ~ 0.03mm, high-precision axis of 0.001 ~ 0.005mm. (2) With the increase of surface roughness and precision levels increase faster operating speed of the machine, the surface roughness of shaft parts are also increasing. Surface roughness is generally supported by the journal Ra0.63 ~ 0.16um automotive shafts, surface roughness with the journal of Ra2.5 ~ 0.63um. Materials are generally used shaft parts shaft parts 45 steel, and according to different operating conditions with different heat treatment process. For moderate precision, high speed shaft parts mechanical shaft parts, can choose 40Cr alloy. 1. ⑴ shaft parts materials commonly used material 45 steel shaft parts precision shaft parts, high precision shafts can be used 40Cr, bearing steel GCr15, spring steel 65Mn, ductile iron can also be used; for high-speed, heavy-duty shaft selection 20CrMnTi, 20Mn2B, 20Cr and other low-carbon steel or 38CrMoAl nitrided steel. ⑵ common shaft rod blank material and forgings; large shaft or axis adopts the structure of complex castings. After heating the forging blank, make the metal inside the fibrous tissue along the surface evenly distributed, obtain a higher tensile, bending and torsional strength. Shaft parts repair | 2015 Fuyuan gear the whole network lowest price | shaft parts provided by Luoyang Fuyuan Gear Machinery Limited. Luoyang Fuyuan Gear Machinery Co., Ltd. (www.lyfycl.com) is a leader in Luoyang, Henan Province, gear over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Fuyuan gear in leadership with the staff warmly welcome all inquiries negotiations to create a better future Fuyuan gear.