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An angular contact ball bearing uses axially asymmetric races. An axial load passes in a straight line through the bearing, whereas a radial load takes an oblique path that tends to want to separate the races axially. So the angle of contact on the inner race is the same as that on the outer race. Angular contact bearings better support "combined loads" (loading in both the radial and axial directions) and the contact angle of the bearing should be matched to the relative proportions of each. The larger the contact angle (typically in the range 10 to 45 degrees), the higher the axial load supported, but the lower the radial load. In high speed applications, such as turbines, jet engines, and dentistry equipment, the centrifugal forces generated by the balls changes the contact angle at the inner and outer race. Ceramics such as silicon nitride are now regularly used in such applications due to their low density (40% of steel). These materials significantly reduce centrifugal force and function well in high temperature environments. They also tend to wear in a similar way to bearing steel—rather than cracking or shattering like glass or porcelain. Most bicycles use angular-contact bearings in the headsets because the forces on these bearings are in both the radial and axial direction. Angular contact ball bearings have raceways in the inner and outer rings that are displaced with respect to each other in the direction of the bearing axis. This means that they are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads. The axial load carrying capacity of angular contact ball bearings increases with increasing contact angle. The contact angle a is defined as the angle between the line joining the points of contact of the ball and the raceways in the radial plane, along which the load is transmitted from one raceway to another, and a line perpendicular to the bearing axis. SKF angular contact ball bearings are produced in a wide variety of designs and sizes. Those commonly used and included in this catalogue are – single row angular contact ball bearings – double row angular contact ball bearings – four-point contact ball ADD:ROOM1012, Tak Hay Bldg,Tak cheong Street,Yau Tsim Mong,Kowloon,HK. FAX:00852 31828510 WEB:STOCKSKFBEARING EMAIL:sales@srg-bearings.com
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Četiri točke kontakta ležajevi su Jednoredni kutni kontakt kuglična i stoga zahtijevaju znatno manje prostora u aksijalnom smjeru nego dvoredni dizajne. Ležajevi čine čvrste spoljašnji, split unutarnjim prstenima i loptu i kavez sklopova sa mesing ili poliamid kaveza. Treba da se...Više Jednostruki kuglični ležajevi i kuglični ležaji sa dvostrukim pravcem mogu da zadovolje veliki aksijalni opterećenj, ali ne smeju biti podložni radijskom opterećenju. Tokom rada ovi ležajevi moraju biti konstantno podložni određenom aksijalnom opterećenju. Sastoji se od dva ravna podloška sa trkačima, lopticama i kavezom. The ...Više