Nsk Corporation

Yukio Ohura

Susumu Tanaka

Kiyotoshi Ueda

Toshikazu Yabe

Takahiko Uchiyama

Manabu Ohori

Susumu Takano

Toshimi Takajo

Fumio Ueki

Yasuhisa Terada

Magozou Hamamoto

Hisashi Kawamura

Akio Fujii

Takanori Yamada

Shigeaki Abe

To provide a rolling bearing for a man-made satellite which is free from the damages, e.g., formation of the band mark on the surfaces of the rolling elements, and the losing of the luster of the surfaces thereof. There is provided a rolling bearing, which is used mainly for a man-made satellite, includes an outer ring, an inner ring, and rolling elements. The parent material of those components is martensitic stainless steel. Of those components, at least the rolling elements are processed to have nitride surface layers formed over their surfaces. A hardness of the nitride surface layer is Hv1200 to 1500.

Rolling bearing

The pockets to in the bearing are arranged along the circumference (A), and the central points (P &tilde;P ) of the pockets to are displaced from the uniform arrangement points of the pockets, that is from the central points on the circumference (A) of the pockets to when the arrangement space of the pockets to is uniform, on the side remote from the reference point (P ) on the circumference (A).

Of a pair of rolling bearings provided for protection of magnetic bearings which support a rotatable shaft in a non-contact condition, such that the rolling bearings for protection are arranged together with the magnetic bearings, and used for supporting the rotatable shaft upon rotation stoppage, one of the rolling bearings for protection is provided on the side where thrust load is received or on the side where positioning in the axial direction is carried out, and comprises a double row, angular ball bearing which has inner and outer races one of which is installed on the rotatable shaft side and of an integral type.

Bearing unit with magnetic bearing protection upon rotation stoppage

A fine nitride layer comprising a compound layer and a diffusion hardened layer of hardness being Hv900 or higher is formed, through a low temperature nitriding method at temperature in the range of 300 to 400&deg; C., in a guiding part. The guiding part guides the circumferential surfaces of retainers to and is formed at any one part of inner ring raceways to and outer ring raceways to as well as the inner circumferential surfaces of the outer rings to , to thereby realize such rolling bearings at low cost, having excellent abrasion resistance, and good corrosion resistance, if needed.

Rolling bearing and method of making the same

A synthetic resin cage for use in a bearing is provide to have a circular ring section and a column section with a plurality of columns, wherein only the base ends of the columns (,) are continued to the circular rig section (,) with the tip ends of the columns (,) being free, and some of the columns (,) have their tip ends connected to each other within a circumferential connecting frame portion (,), and e.g. part of the connecting frame portion (,) aces the end face of the rollers (,) to prevent the cage (,) from dropping out of the bearing.

Synthetic resin cage for roller bearing

An anti-electrolytic corrosion rolling bearing having at least an outer race, an inner race, and rolling elements interposed between the outer and inner races, which has an insulating body on at least one of the outer peripheral surface of the outer race, the inner peripheral surface of the inner race, and the side surfaces of the outer race and inner race, said insulating body being composed of an insulating film or insulating member each containing at least one of a thermoplastic synthetic resin, a rubber, and a thermoplastic elastomer as a base material and having a resistivity of not less than 1.times.10.sup.13 .OMEGA..multidot.cm and a thermal conductivity of not less than 0.5 W/m.multidot.K.

Growing community of inventors

Kanagawa, Japan

Yukio Ohura