According to the motion mode and load requirements, robot bearings are mainly divided into rolling bearings and sliding bearings:
Rolling bearings: With low friction and smooth rotation, they are widely used in joints of humanoid robots.
Common types include:
Deep groove ball bearings: suitable for linear joints and low load rotating joints
Four point contact bearing: capable of withstanding bidirectional axial loads, commonly used in linear joints of lead screws
Angular contact bearings: suitable for rotating joints, high load-bearing capacity
Cross roller bearings: compact structure, high load capacity, high precision, suitable for high-precision rotating joints
Needle roller bearings and cone bearings: commonly used in RV reducers and planetary reducers to meet complex transmission requirements
Sliding bearings: reduce friction through sliding motion, suitable for low-speed heavy load scenarios, but with high starting resistance






