Abstract: A structure for mounting a boot for a homokinetic joint. The boot is mounted between an outer ring of the joint and a shaft with both ends thereof engaging the outer peripheries of the outer ring and the shaft. Fastening bands are put on the engaging portions. Further, rubber rings are fitted on the outer peripheries of the outer ring and the shaft. The boot is formed in both end portions thereof with a predetermined number of slits axially extending from its ends inwardly. The rubber rings are provided with protrusions adapted to engage both ends of the boot, which is engaged in a groove formed in the outer ring and the shaft.

Abstract: Improved greases for use in homokinetic joints are proposed which comprise a base oil, a thickening agent, and an organic molybdenum compound. Greases comprising a base oil, a thickening agent, an organic molybdenum compound, and an organic zinc compound are also proposed. These greases exhibit smaller friction coefficients than conventional greases used for this purpose. On the homokinetic joint lubricated with the grease according to the present invention, the axial force produced is reduced and vibrations generated on the engine are absorbed. The vehicle is prevented from vibrating. The use of an expensive organic metallic extreme-pressure additive is unnecessary.