In some special operating conditions

In some special operating conditions , deep groove ball bearings can be obtained in a longer life of traditional computing, especially under light load conditions . These special operating conditions is that when the rolling surface ( track and rolling elements ) are effectively separated and limit pollutants may cause damage to the surface of a lubricant film . In fact, under ideal conditions , the so-called permanent KOYO bearing  life is possible.
Rolling of life in revolutions ( or hours to work under a certain speed ) , definition: KOYO bearings within this life , should occur initial fatigue damage ( spalling or defect ) any bearing turbocharger bearings  on their laps or rolling . However, both in laboratory tests or in actual use , can be clearly seen , the same appearance under the same operating conditions of the bearing , the actual life different. There are also a number of  different definitions of deep groove ball bearings , " life " , one of which the so-called " working life ", which represents the actual life of a bearing damage can be achieved before by wear, damage is usually not caused by the fatigue , but is caused by wear and tear , corrosion, seal damage and Bearing life testing machine other reasons .
By mechanical means of the metal surface layer is plastically deformed to form a high hardness and high strength hardened layer , the surface strengthening method called surface deformation strengthening , also called hardening . Including blasting , sandblasting, cold extrusion, rolling, cold- milled and shock , explosion shock processing and so on. Features deep groove ball bearings of these methods are: strengthening layer increased dislocation density , sub- crystal structure refinement, making it the hardness and strength increased , the surface roughness value decreases, the surface can significantly improve the fatigue strength of parts and reduce fatigue notch sensitivity. This enhanced process is simple , the effect is significant , there is no clear boundaries between the hardened layer and the substrate , the structure of a coherent , easy to fall off in use. Most of the methods which have been applied in the bearing industry : rolling surface is applied to strengthen the impact of these methods , precision ferrule RCC has become a new and enhanced processing methods .