Abstract: A thrust roller bearing includes: a plurality of rollers which are radially arranged; a retainer having a pocket which is formed in a circular ring shape as a whole and rollingly retains the plurality of rollers; and at least one raceway ring which is provided with a race surface on which the plurality of rollers roll. The raceway ring includes an iron raceway ring and a resin raceway ring having insulating properties, and the iron raceway ring and the resin raceway ring are integrally assembled by being engaged with each other. In addition, the raceway ring may include a resin raceway ring having insulating properties and a pair of iron raceway rings disposed on both front and back surfaces of the resin raceway ring, and the pair of iron raceway rings and the resin raceway ring may be integrally assembled by being engaged with each other.

Abstract: A thrust roller bearing includes: a plurality of rollers which are radially arranged; a retainer having a pocket which is formed in a circular ring shape as a whole and rollingly retains the plurality of rollers; and at least one raceway ring which is provided with a race surface on which the plurality of rollers roll. The raceway ring includes an iron raceway ring and a resin raceway ring having insulating properties, and the iron raceway ring and the resin raceway ring are integrally assembled by being engaged with each other. In addition, the raceway ring may include a resin raceway ring having insulating properties and a pair of iron raceway rings disposed on both front and back surfaces of the resin raceway ring, and the pair of iron raceway rings and the resin raceway ring may be integrally assembled by being engaged with each other.

Abstract: A bearing for use in a water pump or similar apparatus and a method of assembling the bearing. The bearing has a stepped shaft and a counterbored raceway at the fan or pulley end which allows for use of a larger number of balls in the raceway at the fan or pulley end, and which allows for using larger balls at the impeller end. The method of assembly of the bearing includes assembling balls and a cage to form a ball and cage assembly, assembling ball and cage assembly into the outer race at its pulley end, then sliding the shaft, impeller end first, into the outer race through the pulley end such that the first inner raceway and the first balls align with the first outer raceway. The shaft is then displaced in a direction perpendicular to its axial centerline within the outer race. A second plurality of balls is inserted onto the shaft within the outer race at its second outer raceway end, and a second cage is inserted over the shaft and within the outer race to surround the second plurality of balls.

Abstract: A bearing for use in a water pump or similar apparatus and a method of assembling the bearing. The bearing has a stepped shaft and a counterbored raceway at the fan or pulley end which allows for use of a larger number of balls in the raceway at the fan or pulley end, and which allows for using larger balls at the impeller end. The method of assembly of the bearing includes assembling balls and a cage to form a ball and cage assembly, assembling ball and cage assembly into the outer race at its pulley end, then sliding the shaft, impeller end first, into the outer race through the pulley end such that the first inner raceway and the first balls align with the first outer raceway. The shaft is then displaced in a direction perpendicular to its axial centerline within the outer race. A second plurality of balls is inserted onto the shaft within the outer race at its second outer raceway end, and a second cage is inserted over the shaft and within the outer race to surround the second plurality of balls.

Abstract: An autotensioner for use in applying a tension to a moving belt, having a damper apparatus which can follow a sudden change in tension of the belt by improving the piston and plunger structure of the damper apparatus so that the viscous fluid has a liquid surface kept high even when the plunger rises its uppermost position to prevent air from entering underneath the piston.