A special bisignal transducer has been developed which allows pressure and temperature measurements to be made (essentially) simultaneously. With this technique, it is possible to locate the contact zone temperature relative to pressure and evaluate the relationship between heat generation and pressure. Temperature and pressure data obtained using a synthetic mineral oil as the lubricant have been obtained for rolling and rolling-sliding contact in a disk apparatus. The temperature rise through the contact zone has been shown to be on the order of 20–40 C.

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