Oil Pumps

An oil pump is a kind of light and compact pump, and it can be classified into the in-line type, distribution type and single type. The oil pump needs a power source to operate, and the camshaft below it is driven by the engine crankshaft gear. Pump is put forward a kind of has a shell made of alumina materials of oil pump and set in the shell of the movement of the molding, among them, the moving of the molding at least in part by a sintering, contains at least one kind of austenitic iron base alloy material, and one by the molding is made can be sintered materials at least for the shell of the thermal expansion coefficient of thermal expansion coefficient of 60%. A housing made from aluminum-containing material and a movable molded part arranged in the housing are provided are for oil pumps. The movable molded part is made from a sintered material containing at least one austenitic iron-based alloy, and the molded part made from a sinterable material has a thermal expansion coefficient of at least 60% of the thermal expansion coefficient of the casing.