Low-wear grease for journal bearings

A heavy duty lubricating grease consisting essentially of a substantially uniform dispersion including:

• a. a multi-purpose heavy duty hydrocarbonaceous lubricant thickened by a calcium acetate complex to form a lubricating grease that is stable at high temperatures and has an ASTM worked penetration of no less than 265;
• and effective and synergistic amounts of:
• b. particles of molybdenum disulfide that are small enough to pass 100 percent through a 100 mesh screen and 85 percent through a 325 mesh screen,
• c. particles of antimony trioxide that are small enough to pass 100 percent through a 100 mesh screen and 90 percent through a 325 mesh screen,
• such that said heavy duty lubricating grease can be prepared to have a Shell 4-ball EP scar diameter of about 1.4 millimeters maximum after 5 minutes at 900 revolutions per minute under 500 kilograms load.

A heavy duty lubricating grease consisting essentially of a substantially uniform dispersion including:

• a. a multi-purpose heavy duty hydrocarbonaceous lubricant thickened by a calcium acetate complex to form a lubricating grease that is stable at high temperatures and has an ASTM worked penetration of no less than 265;
• and effective and synergistic amounts of:
• b. particles of molybdenum disulfide that are small enough to pass 100 percent through a 100 mesh screen and 85 percent through a 325 mesh screen;
• c. particles of metallic oxide consisting of a mixture of substantially equal parts of antimony trioxide, zinc oxide, lead oxide, nickel oxide, tungsten trioxide, vanadium pentoxide and copper oxide;
• said metallic oxide particles being small enough to pass 100 percent through a 100 mesh screen and 90 percent through a 325 mesh screen;
• such that said heavy duty lubricating grease can be prepared to have a Shell 4-ball EP scar diameter of about 1.4 millimeters maximum after 5 minutes at 900 revolutions per minute under 500 kilograms load.

A heavy duty lubricating grease consisting essentially of a substantially uniform despersion including:

• a. a multi-purpose heavy duty hydrocarbonaceous lubricant thickened by a calcium acetate complex to form a lubricating grease that is stable at high temperatures and has an ASTM worked penetration of no less than 265;
• and
• b. small particles of molybdenum dislufide in an amount of at least 7 percent by weight of said grease;
• said molybdenum disulfide particles having a range of particle sizes, including some fine particles and some coarse particles;
• and being small enough to pass 100 percent through a 100 mesh screen and 85 percent through a 325 mesh screen;
• c. small particles of metallic oxide in an amount of at least 5 percent by weight of said grease;
• said metallic oxide being selected from the group consisting of antimony trioxide;
• and a mixture of substantially equal parts of antimony trioxide, zinc oxide, lead oxide, nickel oxide, tungsten trioxide, vanadium pentoxide and copper oxide;
• said metallic oxide particles being small enough to pass 100 percent through a 100 mesh screen and 90 percent through a 100 mesh screen and 90 percent through a 325 mesh screen;
• such that said heavy duty lubricating grease has a Shell 4-ball EP scar diameter of about 1.4 millimeters maximum after 5 minutes at 900 revolutions per minute under 500 milograms load.