Abstract: A solid lubrication roller bearing capable of stably transferring a lubricant from spacers and reducing wear of a solid lubrication film on the surfaces of rollers is provided. The solid lubrication roller bearing comprises a raceway member having two rolling surfaces, a plurality of rollers forming first members disposed between the rolling surfaces to carry a load and covered with a solid lubrication film, and spacers forming second members interposed between the rollers to hold intervals formed of a self-lubricating material and having a recessed surface in contact with the rollers. Metal balls with a hardness higher than that of the spacer forming third members with a diameter smaller than that of the rollers are interposed between the spacers in at least one position.

Abstract: In some preferred embodiments of the present invention, a long-life rolling element which prevents a solid lubrication film from being broken away near the roots is provided. In a rolling element coated with a solid lubrication film in the form of a molybdenum disulfide sputter film, the solid lubrication film 3 is divided into two layers, a boundary layer 3A corresponding to the boundary between the firm and a roller 2 and an upper layer 3B. The boundary layer 3B has an oxygen content of 5 to 30% in atomic concentration, and the upper layer 3B has an oxygen content of 3% or less in atomic concentration.

Abstract: A magnetic encoder for detecting the speed of an actuator adapted to carry out rotational movement or linear movement by a magneto-resistor is disclosed. This magnetic encoder is intended to carry out output conversion by using a stripe-shaped magneto-resistor located close to a magnetic medium with respect to a periodic magnetic field coming out of the magnetic medium on which at least one track of magnetization patterns are recorded by a pitch p in order to generate the periodic magnetic field depending on the required position reading accuracy. When the unit stripe length of the magneto-resistor is represented by l and the closest distance between the magnetic medium and the magneto-resistor is represented by g, the angle .alpha.