KOYO Thrust ball bearings Single direction With flat back faces, KOYO Bearing 51217, The thrust ball bearing comes in single-direction and double-direction type, with the former able to withstand axial load in a single direction, and the latter able to withstand load from both directions. thrust ball bearings are manufactured as single direction or double direction thrust ball bearings. They are designed to accommodate axial loads only and must not be subjected to any radial load.
In addition to the bearings presented in this section, KOYO supplies thrust ball bearings for special application requirements. This assortment includes bearings with Solid Oil and NoWear coated bearings.
can accommodate initial misalignment
KOYO Thrust ball bearings Single direction With flat back faces, KOYO Bearing 51217, are available in both single (fig. 3) and double direction designs
can be used together with a spheres seat washer adjacent to the housing washer (fig. 4 and fig. 5) or adjacent to a machine component manufactured with a spheres surface
Appropriate Sphere seat washers must be ordered separately (product tables). Depending on the bearing series, they have the basic designation U 2, U 3 or U 4 followed by a two-digit number, which identifies the size, e.g. Spheres seat washer U 320 for bearing 53320).
KOYO Thrust ball bearings Single direction With flat back faces, KOYO Bearing 51217, A thrust ball bearing unit has a pair of ringed cylindrical upper and lower casings, each casing being made of synthetic resin, a pair of upper and lower races, and a buffer interposed between the upper casing and the upper race or between the lower race and the lower casing. Alternatively, two buffers are interposed between the upper casing and the upper race and between the lower race and the lower casing respectively. The upper and lower casings have peripheral sealing portions which are in a labyrinth or contact seal relationship with each other.
A thrust ball bearing includes first and second circular ring shaped bearing disks arranged in spaced-apart disposition and moving eccentrically to one another so that bearing balls, arranged there between, roll on pertaining circular tracks. Both circular ring shaped bearing disks are made from a through-harden-able ferrous material to thereby permit realization of a particularly high fatigue strength.
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