Selecting Bearings Without a Catalog 851510

This paper describes the capabilities and underlying theory of The Timken Company's electronic tapered roller bearing catalog SELECT-A-NALYSIS. “SELECT-A-NALYSIS,” a computer program created to aid designers in selecting and analyzing tapered roller bearing applications, is available through an international time-sharing network.
The manual bearing selection process is reviewed first to determine its ability to find an optimal solution based on the designer's constraints and objectives. This procedure is then examined and tempered by the expertise of bearing application engineers into a new procedure suitable for computerization and, within the constraints of the input, guaranteed to find an optimal solution (or identify the constraint which prohibits a solution). Finally, principles of information management are discussed as a means for improving the efficiency of the computerized selection procedure.
The discussions contained herein pertain to single-row tapered roller bearings supporting a shaft at two positions. Bearing life calculations are limited to the effects of load and speed to simplify the discussion; however, the bearing selection procedure developed can be extended to account for other environmental effects such as load zone, lubrication and alignment.


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