contact point demanding precision tapered bearing scraping

scraping, you should carefully check whether the journal is smooth, whether there is rust, bumps and other defects, if any, should first try to eliminate and then check the contact between the journal and the shaft, inspection methods, coated with a thin layer of the shaft shown agents (such as red lead powder, red Qian oil), followed by the journal mounted in the backing bearing with positive and negative direction of rotation twenty-three hand to turn the shaft out, check the bearing on the distribution of colored points, if the distribution is not normal or colored dot simply not turn to start scraping.scraping examination can show agents, but the contact point demanding precision tapered bearing scraping the last stage can not use the display agent. Because, painted display agent, coloring bearing point is too large and difficult to determine the actual exposure situation. At this point, you can wipe the journal, bearing directly on the check, and then remove the shaft, the bearing can be seen on the highlights, is the point of contact. And then the highlights for scraping until meet the technical requirement.