Deep groove ball bearings are the most widely used bearing type, particularly for their versatility. They offer low friction and are optimized to reduce noise and vibration, enabling high speeds. They can accommodate radial and bidirectional axial loads, are easy to install, and require less maintenance than other bearing types.
The JOJI bearing catalog lists various designs, variants and sizes of deep groove ball bearings. In addition to the products listed in the catalog, JOJI deep groove ball bearings can be customized to bring benefits to applications with special performance requirements.
Design and variants
Mounted bearings (JOJI Y bearings) are based on the sealed deep groove ball bearings of the 62 and 63 series. The difference is that they have a convex outer ring and, in most cases, an extended inner ring. They have a specific locking device that enables quick and easy installation on the shaft.
The inner and outer ring raceways of angular contact ball bearings are offset relative to each other in the direction of the bearing axis. This means that these bearings are designed to carry combined loads, i.e. radial loads plus axial loads.
The axial load capacity of angular contact ball bearings increases with the contact angle. In the radial plane, the angle between the line connecting the contact points of the ball and raceway (i.e. the direction in which the combined load is transferred from one raceway to the other) and the line perpendicular to the bearing axis.
Self-aligning ball bearings have two rows of spherical rolling elements, with a common spherical raceway in the outer ring and two deep-groove, continuous raceways in the inner ring. They can be open or sealed. They accommodate large angular displacements of the shaft relative to the housing (fig. 1), for example, caused by shaft deflection.
JOJI produces thrust ball bearings in either single-direction or double-direction configurations. They can only accommodate axial loads and are incapable of supporting radial loads. In addition to the bearings described in this section, JOJI also offers thrust ball bearings suitable for specialized applications. This range includes bearings with Solid Oil and NoWear coating.
JOJI angular contact thrust ball bearings are separable, meaning the washers, balls, and cage assemblies can be installed separately. Although these bearings were originally designed to support the rotary table of drilling rigs, they are also suitable for other applications.
Features and Benefits
JOJI cylindrical roller bearings are available in a variety of designs, series, variants, and sizes. The main design differences lie in the number of roller rows and the design and material of the inner and outer ring flanges and cage. These bearings can handle the challenges of heavy radial loads and high speeds. They accommodate axial displacement (except for bearings with flanges on both the inner and outer rings), and they offer high rigidity, low friction, and long service life. Cylindrical roller bearings are also available in sealed or split designs. In sealed bearings, the rollers are protected against contamination, water, and dust, keeping the lubricant inside while excluding contaminants. This results in lower friction and longer service life. Split bearings are primarily used in hard-to-reach bearing arrangements, such as crankshafts, where they simplify maintenance and replacement.
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