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Scraping, should carefully check the shaft neck is smooth, if there is rust, scratches and other defects, if you should try to eliminate; then, contacts, check the shaft neck and the shaft inspection method, the shaft diameter is coated with a thin layer of display agent (such as red lead powder, red beauty oil), then the shaft neck is arranged on the KOYO bearing, rotate the two or three turned to positive and negative direction, the shaft removed, check the KOYO bearing colored point distribution, if the color distribution is not normal or simply not to move, to start scraping.
Scraping, should be based on the situation, adopts the principle of light, light weight, strong wind blowing leaves remain small after the first. The first few times, the hand can be heavier, more scrape some metal, quickly reach good contact. When the contact area reached 50%, you should blow gently. Each Guawan one, the tile surface wipe, and then displays the agent on the shaft neck Colonel nuclear inspection, according to the contact of scraping, until it meets the technical requirements. Scraping check can be used to display the agent, but requires a high precision KOYO bearing to the contact point, the final stage not scraping the use of agent. Because the display, coating agent, KOYO bearing coloring on a bit too big, not easy to judge the actual contact. At this time, the shaft neck wipe, directly put check in the KOYO bearing, and the shaft is removed, we can see that the KOYO bearings on the spot, is the point of contact. The bright spot was scraped, until it meets the technical requirements.
Scraping, not only to make the contact point to meet the technical requirements, but also to make the side clearance and contact angle meet technical requirements. The first general research points of contact, but also take care of contact angle, then scrape side clearance. However, the contact part and the non contact part should not have clear boundaries, and KOYO bearing surface rub with your fingers, should not aware of.
Open the oil groove to rely on the experience, but is the master key principles:
1, the lubricating oil from the oil film pressure minimum input KOYO bearing;
2, oil groove bearing area in non, otherwise it will reduce the carrying capacity of the oil film;
3, the oil groove axial cannot open, in order to avoid the oil from the oil tank end loss;
4, horizontal installation of KOYO bearing oil groove and half weeks, do not extend to the bearing area, around the oil tank should be near KOYO bearing end.
In addition, into the oil hole on the bearing at the top, oil groove around the oil inlet hole as the center, oil groove width and equal aperture shape can be taken, "-", "*" shape, "Wang" shape.

(1) installation: installed in the wheel shaft, must be installed and parallel, because the outer ring of TIMKEN bearings are fixed on the chassis, while the inner ring is active, so attention should be paid to the inner surface of the wheel not jam TIMKEN bearing clearance, set aside 0.2-0.5mm comparison between the ideal and the TIMKEN side of the inner side of the wheel bearing. If the guide wheel is arranged with the ball bearing TIMKEN, a special pad intermediate must be matched with a step, each wheel uses two gasket, clip in TIMKEN bearing inner ring, and locking nut.
(2) the usual maintenance: usually car process, should pay attention to maintenance, such as found in TIMKEN bearing to rotate a rustling sound or not very smooth, must take the TIMKEN bearing or roller tear open come down to clean, also in the car before, want to add lubricating oil to TIMKEN bearing, in order to further reduce the friction