Product Description:
Extra ball Extra life Bearing
In many cases involving bearing selection during the initial design of a machine, obtaining a satisfactory rating life is the prime consideration. The shaft size is usually decided first, based on allowable working stress and deflection. This establishes the bearing bores. Fortunately for the equipment designer, standard bearings can be found with different O.D.s and widths for a given bore size. As the bearing envelope volume increases with O.D. and width, dynamic capacity increases accordingly, yielding increased rating life.
Once the loads and speeds have been determined, the question now becomes, “How many hours of rating life are needed for a well-designed machine?” Sometimes, this is spelled out either by specific industry standards or company policy based on the industry and customer expectations. It may be perfectly acceptable in one industry for the end user to overhaul their equipment, replacing bearings, seals, etc. once every year. In another industry, it may be expected that the bearings last ten years minimum. Also to be taken into consideration when determining the value of the minimum desired rating life is how often the equipment is in use. Does it run intermittently or full time during a work shift? How many shifts per day and how many days per week
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