Terminology (Lubricants)

• Flash point is the temperature at which an oil or grease gives off inflammable vapours.
• Flash point is the temperature at which an oil or grease gives off inflammable vapours.
• Burning point is the temperature at which the oil catches fire.
• Burning point is the temperature at which the oil catches fire.
• Cold point is the temperature at which any grade of oil or grease will freeze.
• Cold point is the temperature at which any grade of oil or grease will freeze.
• Friction creates heat, and heat in sufficient quantity will reduce the wearing properties of a bearing lining to a point where rapid deterioration, or even entire breakdown, of the lining may occur.
• Friction creates heat, and heat in sufficient quantity will reduce the wearing properties of a bearing lining to a point where rapid deterioration, or even entire breakdown, of the lining may occur.
• Oil clearance is the space between the journal and the bearing.
• Oil clearance is the space between the journal and the bearing.
• The properties of cohesion and adhesion play an important part in fluid film formation.
• The properties of cohesion and adhesion play an important part in fluid film formation.
• Cohesion is the force that holds a substance together.
• Cohesion is the force that holds a substance together.
• Grease is more strongly cohesive than oil, and oil is more strongly cohesive than paraffin.
• Grease is more strongly cohesive than oil, and oil is more strongly cohesive than paraffin.
• Adhesion is the ability of one substance to cling or stick to another material.
• Adhesion is the ability of one substance to cling or stick to another material.
• Oil strongly adheres to steel, while water does not.
• Oil strongly adheres to steel, while water does not.
• A film pressure with sufficient adhesive strength will separated the journal and bearing surfaces, and the journal would turn with no interlocking of the protruding parts.
• A film pressure with sufficient adhesive strength will separated the journal and bearing surfaces, and the journal would turn with no interlocking of the protruding parts.
• With the help of fluid motion, the journal would turn freely with a minimum of friction.
• With the help of fluid motion, the journal would turn freely with a minimum of friction.
• The high adhesive strength of the oil would cause layers of molecules to cling to the two metal surfaces.
• The high adhesive strength of the oil would cause layers of molecules to cling to the two metal surfaces.
• The low cohesive strength of the lubricant would allow the molecules in the intermediate layers.
• Viscosity depends on the design and function of the bearing.
• Viscosity depends on the design and function of the bearing.