RB Crossed Roller Bearing

Design principle The rollers are arranged orthogonally to form an X-shaped contact line, maximizing the contact area and reducing local stress. The integral structure of the inner and outer rings enhances rigidity, making it suitable for heavy-load impact working conditions. Performance Characteristics: High Load-bearing Capacity: The basic dynamic load rating (Cr) is 2.9-1350 kN (depending on the model). Impact Resistance: The GCr15 material undergoes surface hardening treatment, increasing the fatigue life by 25%. Easy Installation: The integral design reduces assembly errors and is suitable for standardized shaft-hole fits.

1.Core Structural Design The rollers are arranged orthogonally and crosswise at a 90° angle in an X - shape. Cylindrical rollers are evenly distributed on a single raceway, enabling the bearing to simultaneously bear radial, bidirectional axial, and moment loads and reducing stress concentration. The inner ring is of an integral type and undergoes integrated precision grinding to ensure consistent roller movement trajectories. The outer ring is of a split type, facilitating installation and pre - load adjustment and reducing assembly errors. 2.Load Distribution and Rigidity Enhancement Radial loads are dispersed through the vertical contact between the rollers and the raceways. Axial loads are borne by the contact between the roller end faces and the side walls of the raceways, eliminating the need for additional thrust bearings. Diagonal rollers transmit moments. Compared with traditional bearings, the anti - overturning capacity is increased by approximately 3 to 4 times. The cross - layout increases the contact area. Combined with GCr15 high - carbon chromium steel, it significantly enhances rigidity and reduces deformation. 3.Lubrication and Sealing For grease lubrication, long - acting grease is used, which is suitable for high - temperature or vacuum environments. For oil lubrication, a circulating oil system is employed for ultra - high - speed or heavy - load scenarios to reduce frictional temperature rise. There are two types of sealing: open type, suitable for clean environments, and contact rubber sealing (UU/U), applicable to dusty, humid environments or when both protection and heat dissipation need to be considered. 4.Installation and Fit RB series models are equipped with M3 - M12 mounting bolt holes, facilitating fixation to the equipment base. The tolerances of the inner and outer rings vary depending on the inner diameter range.