Import rolling bearings and preload preload
Internal clearance (original clearance) Bearing pre-installation and post-installation time to reach operating temperature bearing internal gap (known as work space) is different from the former large, with different applications, many of the requirements of running a negative gap, ie the load is applied, this in order to ensure the bearing preload is used at the time of mating under load conditions to prevent the damage caused by skidding.
Main functions: to raise import bearing stiffness, reduce operating noise, the running clearance compensation increased wear and tear, and improve the accuracy of the guide shaft, for this purpose to extend the service life of bearings.
Pre-pressure is often the main index (dynamic load rating Cr) coefficient, optimal preload needs to first calculate the preload force, determined after tests confirmed constantly revised normal value, the implementation of the regulation by different methods.
