Could you tell me bearing stiffness is what mean? - bearing knowledge

Rigid bearing refers to the size of bearing force needed to generate unit deformation. The elastic deformation of rolling bearings is small, can not be considered in most of the machinery, but in some machinery, such as spindle, bearing rigidity is an important factor, generally should choose the cylindrical and conical roller bearing. Because of these two kinds of bearing under the load, the rolling element and raceway for line contact, elastic deformation small, rigid good. All kinds of bearing can also through the preloaded, achieve the goal of increasing bearing rigidity. Such as angular contact ball bearings and tapered roller bearings, to prevent the vibration of the shaft, increase the bearing stiffness, often impose certain axial force in advance when installation, make its mutual pressure. Prestressing quantity, of course, not too big, too will make bearing friction increases, higher temperature rise, affect the service life of bearing.