Thin-walled bearings are a type of small, lightweight bearing with an ultra-thin cross-sectional structure. They are mainly divided into sealing forms such as rubber seal-RS and iron seal-ZZ, and are produced by manufacturers such as Luoyang Purui Sen. Their inner diameter to outer diameter ratio is ≤1.25, and they adopt an equal cross-section design to maintain high precision and strong load-bearing capacity. The structure covers various types such as thin-walled crossed roller bearings, deep groove ball bearings, and four-point contact ball bearings [1] [4] [6]. The product accuracy can reach P4 and P2 levels, and it is applied in industrial robots, medical equipment, aerospace, and other fields [1] [3-4].
