KB120AR0 Large-scale Automated Rotary Table Thin-section Bearing

The KB120AR0 is an open-type, constant-section bearing with a 30° contact angle, featuring GCr15 rings, a brass cage, and precision steel balls.Featuring a large-aperture, lightweight hollow structure, it offers excellent load-bearing capacity and smooth, high-precision rotation, making it widely suitable for large industrial robots, aerial gimbals, and medical imaging rotation equipment.

Slim section bearings are composed of four parts: inner ring, outer ring, rolling elements, and cage. The cross-sectional dimensions of the inner and outer rings are uniform, the cross-section is standard square, and the wall thickness is uniform and thin. The inner and outer ring raceways are integrally formed, the raceway size is fixed, and the cross-sectional specifications remain unchanged when the inner diameter changes. The rolling elements are small steel balls, evenly arranged between the inner and outer raceways; the cage separates the steel balls, limits the distance between the rolling elements, and avoids mutual friction. There is no widening or thickening structure in the inner and outer rings, the overall wall thickness is consistent, the raceway surface is regular, and the cross-sectional parameters of the parts are uniform. The entire set of bearings only differs in inner diameter among specifications, and the rest of the structural cross-section dimensions are exactly the same.

There are two main types of lubrication for thin section bearings: grease and lubricating oil.Grease has strong adhesion and is suitable for low-speed working conditions. It can form a protective oil film on the raceway for a long time to reduce wear. Lubricating oil has good fluidity and fast heat dissipation, and is mostly used in high-speed operation scenarios. The filling amount needs to be controlled when filling. Too much grease will increase the running resistance and increase the temperature. Too little grease can easily cause dry grinding and scratch the raceway. High-precision bearings such as P4 and P2 need to use clean special lubricating media to avoid impurities from damaging the precision surface. Reasonable lubrication can reduce friction, stabilize rotation accuracy, and effectively extend the service life of bearings.

Thin section bearings have the core characteristics of uniform cross-section thickness, lightness and thinness, and high rotation accuracy, which can greatly save equipment installation space. The compact structure of this bearing makes it suitable for various small precision rotating parts: Industrial robot joints use it to reduce joint volume; optical and semiconductor testing equipment use high-precision models to ensure stable positioning; medical imaging equipment relies on thin-wall design to streamline the body; small aviation instruments use lightweight to reduce their own weight. When selecting the model, the specifications should be matched based on the load and accuracy requirements to meet the operation requirements of various precision equipment.