Abstract: A lapping apparatus lapping a work having a pre-machined surface comprises a lapping film which includes a thin substrate having a surface provided with abrasive grains, a shoe disposed at a back surface side of the lapping film, a shoe driving unit which drives the shoe toward the work in order to press the abrasive-grained surface of the lapping film to the pre-machined surface of the work, a rotational driving unit which drives the work rotationally, a detecting unit which detects the position of the rotating work in the rotating direction, and a controlling unit which controls the pressing force of the shoe driving unit so as to drive the shoe correspondingly to the position of the work in the rotating direction during machining.

Abstract: A film feeder (FF1) feeds a film (1), a first drive (20) rotates a work (W), a second drive (30) moves the work (W) relative to the film(1), a shoe set handler (40) handles the shoe set (2) to press the film (1) against the work (W), and a deterioration delayer (C) is configured to delay an abrasivity deterioration of the film (1).

Abstract: A rotary assembly for traction drives, including a plurality of rolling elements having a rotation axis and traction contact surfaces around the rotation axis and associating with each other to transmit a motive power between the rolling elements via a traction oil film formed between the traction contact surfaces, in which at least one of the traction contact surfaces has a microstructure with irregularities which sizes are larger than a thickness of the traction oil film. The process for the traction contact surface is also disclosed.

Abstract: A low friction sliding element for reciprocating engine parts, including a sliding contact surface that is in sliding contact with a counterpart during relative sliding motion of the sliding element and the counterpart. The sliding contact surface has microscopic recesses and plateaus interrupted by the recesses. The recesses have depths regularly varying in a sliding direction of the sliding element.

Abstract: A rotary assembly for traction drives, including a plurality of rolling elements having a rotation axis and traction contact surfaces around the rotation axis and associating with each other to transmit a motive power between the rolling elements via a traction oil film formed between the traction contact surfaces, in which at least one of the traction contact surfaces has a microstructure with irregularities which sizes are larger than a thickness of the traction oil film. The process for the traction contact surface is also disclosed.

Abstract: A rotary assembly for traction drives, including a plurality of rolling elements having a rotation axis and traction contact surfaces around the rotation axis and associating with each other to transmit a motive power between the rolling elements via a traction oil film formed between the traction contact surfaces, in which at least one of the traction contact surfaces has a microstructure with irregularities which sizes are larger than a thickness of the traction oil film. The process for the traction contact surface is also disclosed.

Abstract: A low friction sliding element for reciprocating engine parts, including a sliding contact surface that is in sliding contact with a counterpart during relative sliding motion of the sliding element and the counterpart. The sliding contact surface has microscopic recesses and plateaus interrupted by the recesses. The recesses have depths regularly varying in a sliding direction of the sliding element.