Overloading of the main points of the bearing selection and the selection of points of the high rigidity of the bearing is basically the same. Load bearing applications must be combined with the heavy bearing characteristics to consider. Overloaded bearings often work in high-stress state, and the bearings of high stress is very sensitive to all aspects of application technology should seek to mitigate the stress of the bearing stress mitigation very beneficial to extend the life of the bearing. Machine such as a high-load under the conditions allowed by the axial position, the fulcrum of the original with a single bearing doubled for the two radial load, while the impact of uneven load, in the same work under the conditions of the fulcrum two bearing life each is expected to improve much more than twice than the original single bearing. In fact, in the heavy machinery is often used in a fulcrum multiple bearing one or more columns bearing radial load.
   
1. Heavy bearing with clearance and lubrication with heavy bearing clearance and lubrication must be unified to consider. Order to mitigate the stress of heavy bearing, thicker lubrication film, so biased towards the use of the lubricating oil of high viscosity or high viscosity oil as the base oil, grease, and at the same time want to ensure good lubrication conditions, The lubricant viscosity caused by the friction torque is not too high. Heavy bearing swivel ferrule cooperated with profit than ordinary circumstances, which the raceway deformation as well as the bearing life has adverse effects, so in the hope that the appropriate reduction in the amount of interference possible, which requires lower mating surface roughness, while maintaining normal lubrication because the lubrication in case of failure, under heavy raceway surface friction torque with the surface creeping tendency, even slipping phenomenon, these phenomena occur in the outer ring - but serious The inner ring also can not help.
 
The outer ring of the actual with the Note should not appear too large gap, grease so as not to penetrate the surface, prompting the skid phenomenon, as well as the deformation of rings is easy to reduce the bearing load zone. Only after careful to take effective measures to allow interference with the appropriate reduction in the heavy-duty bearings, and the amount of interference, although a slight decrease, improve on the bearing stress state, of course, the thicker film, the greater the benefit. Under heavy load bearing rolling surface contact area with tight rings close to capacity and a large deformation, usually bearing clearance has also been made larger.
   
2. Bearing conditions of use host transmission chain drive shaft should be appropriate to take the higher speed from the host design to improve further to speed up the drive to the spindle, and leave the installation of spindle bearing parts should be large, easy to using more large bearings, these bearings are very favorable.



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