Headquartered in Gothenburg, Sweden, SKF is the world's largest bearing manufacturer with more than 500 million annual productions and an annual turnover of more than $5 billion. The company was founded in 1907, and invented the following bearings: In 1909, the invention of self-aligning ball bearings: invented spherical roller bearings in 1920; in 1939 launched spherical roller thrust bearings; in 1987 invented CARB bearings, and In the same year, the patent was obtained. CARB bearings are designed to accommodate both angle-to-error and axial displacement and can withstand loads up to 30% higher than the most rugged bearings previously involved. It is a bearing that reduces size, reduces weight and reduces manufacturing costs.
The main structure and characteristics of CARB bearings
CARB bearings are mainly composed of outer ring, roller, cage and inner ring. The biggest structural feature of this type of bearing is that the roller has a large length and a waist drum shape, and the radius of the curved surface is much larger than that of the single or double row spherical roller bearing.
The center of curvature of the CARB bearing outer ring raceway is not located on the axis of the bearing like a spherical roller bearing. Obviously, this optimized point surface radius can make the load distribution more reasonable and reduce the friction. In addition, the self-guide of the roller is obtained by a good match between the roller and the geometry of the inner and outer ring raceways. The roller is long and the contact angle is zero.
It is well known that spherical roller bearings allow angular alignment errors, but do not allow internal axial displacement; short cylindrical roller bearings allow axial displacement, but angular alignment errors are not allowed; needle bearings are compact and do not allow misalignment. In fact, CARB bearings concentrate on the advantages of spherical rollers, short cylindrical roller bearings and needle bearings, mainly in: He can withstand the eccentricity and large radial load like spherical roller bearings, like cylindrical roller bearings. Can withstand axial displacement; he is small in size, light in weight and large in carrying capacity.
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