Ah analysis of the factors involved in the high-speed operation of needle hearings including stresses due to maneuvering loads, def-ormations due to operation at high temperatures, and internal forces within the hearing is presented. An expression for end thrust vas derived wherein end thrust was found to be approximately equal to the external load multiplied by an over-all equivalent coefficient of friction. This equivalent coefficient of friction was experi¬mentally obtained over a wide range of operating conditions.
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