22221 Large mechanical Excavator bearings from Japan

Brif introductions of 22221 bearings

Spherical roller bearings, sometimes termed barrel roller bearings, are single or two row self-aligning roller bearings. They comprise solid outer rings with a concave raceway. They have solid inner rings and a cylindrical or tapered bore and barrel-shaped (aka: spherical) rollers with separator cages. The cages are typically made of steel for high loading or of bronze for smoother performance.

Bearings 22221 is particularly suitable where high radial shock type loads occur and misalignments must be compensated for. Their axial load carrying capacity is relatively small. The oscillating motion of a vibrating screen, used in mining and oil extraction/exploration, is a perfect example of where these bearings come into their own.

Bearings 22221 has two rows of rollers, a common sphered outer ring raceway and two inner ring raceways inclined at an angle to the bearing axis. The centre point of the sphere in the outer ring raceway is at the bearing axis. Therefore, the bearings are self-aligning and insensitive to misalignment of the shaft relative to the housing, which can be caused, for example, by shaft deflection. Spherical roller bearings are designed to accommodate heavy radial loads, as well as heavy axial loads in both directions.

With th e same center as the bearing, 22221 bearings formed outer ring raceway can make self-alignment. Their rolling elements linearly come into contact with the raceways of inner ring and outer ring. The Spherical Roller Bearings can take greatradial load.

Specifications of bearings 22221

Type: Spherical roller bearing

Material:Chrome steel

Cage:Steel cage&E structure

Tolerance: ABEC3; ABEC5, ABEC7, ABEC9

Certificate: ISO9001: 2000, SGS

Lubrication: Self Lubricated (Grease)

Size:110X200X53MM

Dynamic load rating Cr:560KN

Static load rating Cor:640KN

limiting speed:4000RPM

Reference speed:3000RPM

Weight:7.56KG

Features of bearings 22221
1) Bearings 22221 is principally provided with two rows of symmetrical spherical rollers and a common sphere raceway in out ring, the two inner ring raceways are included at an angle to the bearing axia

2) Bearings 22221 has good self-aligning ability and can operate when the shaft deflection under load or the shaft deflection under load or the shaft misaligning in mounting, and their permissible aligning angle is 1 to 2.5 degree

3) This type of bearings 22221 has heavy load carrying capacity and anti-impact ability, in addition to radial loads, they also can carry axial loads in two directions

4)In general, this type of bearings permits a low limiting speed.

Applications of bearings 22221

5} Bearings 22221 is designed in such a way that it is self-aligning.That means that bearing can adjust itself and angular alignment tolerance between outer rings.Under normal load and working condition and inner ring rotates,the unsymmetrical value listed in below table is allowed.Achieving completely specifide value is subject to design and seal type of configured bearing.

Heavy machinery (e.g. construction and mining machines), rolling mills, gear boxes, shaker screens, etc.

 Model numbers of spherical roller bearings