Abstract: A grease composition for use in ball type constant velocity joints, which comprises the following components a base oil; a diurea thickener of the formula: R1—NH—CO—NH—C6H4-p-CH2—C6H4-p-NH—CO—NHR2 wherein R1 and R2 are alkyl groups having 8 carbon atoms, molybdenum disulfide; molybdenum dithiocarbamate of the formula: (R3R4N—CS—S)2—Mo2OmSn wherein R3 and R4 independently represent an alkyl group having 1 to 24 carbon atoms, m is 0 to 3, n is 4 to 1 and m+n=4, calcium salts or overbasic calcium salts of petroleum sulfonates, sulfur-phosphorus extreme pressure agent, and castor oil. The grease composition exhibits excellent wear-resistance and pitting-inhibitory effect.

Abstract: A vehicle-use bearing device having a double row rolling bearing fitted around an outer peripheral surface of a hollow shaft portion of a hub wheel, wherein a held portion between an axially intermediate position and a vehicle outer side in the hollow shaft portion of the hub wheel is axially held between the axially intermediate position of an outer ring shaft portion of a constant velocity joint and the vehicle outer side so that a cup-shaped cylindrical portion of an outer ring of the constant velocity joint is free of contact with a caulked portion in the hollow shaft portion of the hub wheel at the shaft end on the vehicle inner side in order to connect the hub wheel with the constant velocity joint without a clearance, whereby an excessive preload which can affect a rolling performance of the double row rolling bearing is not imparted on the bearing.

Abstract: A vehicle-use bearing device having a double row rolling bearing fitted around an outer peripheral surface of a hollow shaft portion of a hub wheel, wherein a held portion between an axially intermediate position and a vehicle outer side in the hollow shaft portion of the hub wheel is axially held between the axially intermediate position of an outer ring shaft portion of a constant velocity joint and the vehicle outer side so that a cup-shaped cylindrical portion of an outer ring of the constant velocity joint is free of contact with a caulked portion in the hollow shaft portion of the hub wheel at the shaft end on the vehicle inner side in order to connect the hub wheel with the constant velocity joint without a clearance, whereby an excessive preload which can affect a rolling performance of the double row rolling bearing is not imparted on the bearing.

Abstract: In a construction in which a double row rolling bearing and a constant velocity joint are mounted to a hub wheel, a fixing ring fixedly mounted to a vehicle-outer side opening of the hub wheel is sandwiched between a vehicle-outer side end face of an outer ring shaft of the constant velocity joint and a bolt integrally mounted to the shaft in the axial direction, thereby coupling the outer ring of the constant velocity joint to the hub wheel. In this case, a simple coupling operation only for mounting the bolt to the shaft suffices, and a pre-load that has been applied to the rolling bearing is maintained invariably.

Abstract: In a construction in which a double row rolling bearing and a constant velocity joint are mounted to a hub wheel, a fixing ring fixedly mounted to a vehicle-outer side opening of the hub wheel is sandwiched between a vehicle-outer side end face of an outer ring shaft of the constant velocity joint and a bolt integrally mounted to the shaft in the axial direction, thereby coupling the outer ring of the constant velocity joint to the hub wheel. In this case, a simple coupling operation only for mounting the bolt to the shaft suffices, and a pre-load that has been applied to the rolling bearing is maintained invariably.