scraping, should be under the circumstances

class = MsoNormal> 1, 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;
2, and then check the contact tapered bearing 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 bearing, with positive and negative direction of rotation twenty-three hand to turn the shaft out, check the Roller bearing on the distribution of colored points, if the distribution is not normal or colored dot simply not turn to start scraping.
3, scraping, should be under the circumstances, to take the first re-light, scraping heavy to stay light, scratch big to stay small principle. The first few times, the hand can be heavier, more scrape some metal to quickly achieve better {TodayHot} contacts.
4, when the contact area reaches 50%, it should scuffing. Every once scraped off, wipe the tile surface, and then displayed on the journal repellent check inspection, according to the conditions of exposure scraping until it meets the technical requirements so far.
5, scraping examination can show agents, but the contact point demanding precision Backing bearings  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.
Scraping, not only to make the contact points meet the technical requirements, but also to make the contact angle of the side clearance and technical requirements. Usually the first point of contact research, but also to take care of the contact angle, the last Zaigua backlash. However, the contact portion and the non-contact portion not have clear boundaries, wipe the bearing surface with fingers, no trace should be aware