SPINDLE MOTOR

A spindle motor is disclosed, wherein the spindle motor is integrally formed by a one side-exposed cylindrical bearing housing by pressing a metal sheet plate to save material costs and to simplify an assembly process of constituent elements, whereby the manufacturing cost can be reduced, and a bearing housing is press-fitted or bonded to a base without caulking process to make a perpendicularity of the bearing housing against the base accurate, whereby a perpendicularity of a rotation shaft against the base is also accurate, and whereby noise and vibration are reduced, and the integral formation of the bearing housing inhibits oil discharged from the bearing from leaking toward a lower surface of the bearing housing, thereby prolonging the life of the product.