Abstract: A double-layer sliding bearing made of a sintered double-layer green compact comprises an inner layer and an outer layer. A circular bearing surface is formed on either an inner periphery of the inner layer or an outer periphery of the outer layer. Either the inner layer or the outer layer with the bearing surface has a higher forming density and a thinner wall thickness than the other layer without the bearing surface, resulting in notable radial differences in forming density and porosity between the inner layer and the outer layer.

Abstract: A method of molding a double-layer sliding bearing made of a sintered double-layer green compact comprises an inner layer and an outer layer. A circular bearing surface is formed on either an inner periphery of the inner layer or an outer periphery of the outer layer, wherein either the inner layer or the outer layer with the bearing surface is defined as a first layer that has a thinner wall thickness and a higher forming density than the other layer without the bearing surface defined as a second layer. The invention provides molding processes for the reinforced and perforated first layer and also for the double-layer green compact to combine a prepared first layer with a compressed powder forming the second layer.

Abstract: A ball bearing assembly includes at least two units being axially coupled together to allow at least one set of plural spherical balls adapted to be installed between at least one pair of two adjacent units of the at least two units.

Abstract: A ball bearing assembly includes at least two units being axially coupled together to allow at least one set of plural spherical balls adapted to be installed between at least one pair of two adjacent units of the at least two units.

Abstract: A double-layer sliding bearing comprises an inner layer and an outer layer. An inner periphery of the outer layer is integrated with an outer periphery of the inner layer through moulds for molding processes. A circular bearing surface is formed on either an inner periphery of the inner layer or an outer periphery of the outer layer. A layer having the bearing surface is arranged by a porous thin-wall layer with high forming density. The other layer not having the bearing surface is arranged by a porous thick-wall layer with low forming density.

Abstract: A ball bearing assembly includes at least two units being axially coupled together between which at least one set of plural spherical balls is installed to allow a shaft adapted to be run through and supported by the at least one set of plural balls.

Abstract: A bush assembly includes a porous inner unit being axially embedded in an outer unit adapted to be press-fitted with each other via mating surfaces at both ends of the embedded two units between which a storage chamber is formed to store lubricating media therein.