What are the selection of roller bearing clearance?
1. Roller bearing clearance: means that the idler bearing is not installed in the shaft or bearing housing; the one of the inner or outer ring is fixed; then the unfixed one is moved radially or axially. The amount of movement. According to the direction of movement; can be divided into radial clearance and axial clearance.
2. The size of the play during operation (referred to as the working clearance) affects the bearing's tumbling fatigue life, temperature rise, noise, oscillation and other functions when measuring the clearance of the bearing; in order to obtain a stable measurement value; usually The bearing imposes a regular measurement load. The measured value obtained is therefore larger than the actual clearance (called the theoretical clearance); that is, the amount of elastic deformation occurring by the measured load is increased but for the roller bearing; because of the elastic deformation The internal clearance of the front roller bearing is usually indicated by the theoretical clearance.
3, the selection of the idler bearing clearance: from the theoretical clearance minus the bearing device on the shaft or inside the casing, the expansion of the ferrule caused by the interference cooperation or the shortened clearance is called "device clearance in the device The clearance after the clearance is added or subtracted due to the dimensional variation of the internal temperature difference of the bearing is called the “useful clearance”. The bearing device has a mechanically acceptable clearance when the load is placed; that is, the useful clearance plus the bearing load occurs. After the amount of elastic deformation, it is called "work clearance"