Abstract: A process which allows the entering or retrieval of data without the concern of the units attached to the data. This is achieved by converting the input data into an internal data format, the internal data format having a numeric value and units which are equivalent to the input data. To retrieve data, the user selects the desired units, and the system converts the internal data to the desired units, and then outputs the result.

Abstract: A method of preloading the upper ball bearing of a spin casting machine. Spring force is used to lift the inner bearing race and preload the bearing upward. Spring force is applied against a bearing collar which rests against the lower surface of the inner bearing race. The rotor shaft has a sliding fit within the inner race and the bearing collar. The rotor shaft is frictionally coupled to the inner bearing race by the force of the preloading spring through the bearing collar.