In order to make a bearing, such as a roller bearing, insensitive to a lack of maintenance lubrication or irregular maintenance lubrication while at the same time retaining its mechanical performance, at least one bearing part of the bearing is provided at least partially with an oleophilic adhesion promoter layer. The adhesion promoter layer binds a lubricant layer of the bearing to the bearing part provided with the adhesion promoter layer. The adhesion promoter layer is bonded to an elemental-iron-free surface of a bearing part body. The removal of free iron from the bearing part body surface is carried out with nitric acid, chromate solution and/or citric acid. The treated bearing part has an oleophilic anti-corrosion adhesion promoter layer. The bearing may be used in pressure-operated devices, in particular in turbine handpieces used by dentists, because the loss of the lubricant layer during operation of the device was particularly high.

There is provided a rotary seal capable of delaying a progress of corrosion of a steel-made member without increasing manufacturing cost even when a solution containing an electrolyte is present around a contact portion between a stainless steel-made member and the steel-made member. At least one of (i) a metal fitting portion A between a sleeve 2A of a stainless steel-made slinger 2 of a rotary seal 1A and an inner ring 12 that is a steel-made radially inner member, and (ii) an outside-air side surface of the slinger 2, which includes an outside-air side end portion of the fitting portion A, is provided with at least one of a silane-based adhesive layer containing powder of metal having a higher ionization tendency than iron, a thermosetting resin adhesive layer containing powder of metal having a higher ionization tendency than iron, and a coating film containing powder of metal having a higher ionization tendency than iron.

In order to make a bearing, such as a roller bearing, insensitive to a lack of maintenance lubrication or irregular maintenance lubrication while at the same time retaining its mechanical performance, at least one bearing part of the bearing is provided at least partially with an oleophilic adhesion promoter layer. The adhesion promoter layer binds a lubricant layer of the bearing to the bearing part provided with the adhesion promoter layer. The adhesion promoter layer is bonded to an elemental-iron-free surface of a bearing part body. The removal of free iron from the bearing part body surface is carried out with nitric acid, chromate solution and/or citric acid. The treated bearing part has an oleophilic anti-corrosion adhesion promoter layer. The bearing may be used in pressure-operated devices, in particular in turbine handpieces used by dentists, because the loss of the lubricant layer during operation of the device was particularly high.

[Problem] To provide a linear motion device using a highly reliable and environmentally friendly separator that improves a dimensional stability, ductility, and adhesion of greases based on poly-?-olefin oil, which are required for separators, and also prevents deformation at high speeds.

[Solution] Provided is a linear motion device including a linear motion body (15) that is fitted onto a screw shaft (11) and moves straight along the screw shaft (11), a large number of balls (B) held in a ball groove (14) formed on an inner surface side of the linear motion body (15) and rolling between the ball groove (14) and the screw shaft (11), a separator (100) interposed 10 between each ball (B), a circulation passage (18) formed in the linear motion body (15) and circulating the ball (B) from one end side of the ball groove (14) to the other end side, where at least one of the separator (100) and the circulation passage (18) is formed from polyamide 410 by injection molding.

A thrust bearing comprises an electromagnetic stator with a stator surface and a rotor disk with a rotor surface facing the stator surface. The rotor disk comprises a radially inner portion made of a first material directly and exclusively connected to a radially outer portion made of a second material. The first material is a corrosion resistant metal or metal alloy and the second material is a ferromagnetic metal or metal alloy.

A generator includes a sliding member, a first power generation element and a second power generation element. The sliding member is made of a biomass-containing material. The first power generation element is configured to slide with respect to the sliding member. The second power generation element is configured to generate electrical power by variation of its relative position with respect to the first power generation element.

Systems, apparatus, articles of manufacture, and methods are disclosed that include an air foil bearing, the air foil bearing comprising: a thrust disc coupled to a rotor shaft, the thrust disc and rotor shaft to rotate; a thrust pad aligned with a first side of the thrust disc, the thrust pad to engage with the thrust disc as the thrust disc rotates; and a micro lattice structure between the thrust disc and the thrust pad, the micro lattice structure to mitigate the thrust pad engaging with the thrust disc.

A linear motion device includes a linear motion body that is fitted onto a screw shaft and moves straight along the screw shaft, a large number of balls held in a ball groove formed on an inner surface side of the linear motion body and rolling between the ball groove and the screw shaft, a separator interposed between each ball, a circulation passage formed in the linear motion body and circulating the ball from one end side of the ball groove to the other end side, where at least one of the separator and the circulation passage is formed from polyamide 410 by injection molding.