... middle of this century two distinct regimes of lubrication were generally recognized. The first of these was hydrodynamic lubrication. The development of the understanding of this lubrication regime ... characteristics of machine elements. Consequently, an adequate knowledge of theviscosity-pressure and viscosity-pressure-temperature relationships of lubricants is indispensable.Oil Lubrication Except ... Sons, Inc.CHAPTER 21 LUBRICATION OF MACHINE ELEMENTS Bernard J. HamrockDepartment of Mechanical EngineeringOhio State UniversityColumbus, OhioSYMBOLS 50821.1 LUBRICATION FUNDAMENTALS...