Lubricating oil for rolling bearing in high-speed rotating equipment and bearing lubricated with the same lubricating oil

A rolling bearing for a high-speed rotating equipment, said rolling bearing being provided with a rolling bearing element constructed of an outer ring, an inner ring, rolling elements and a retainer to rotatably support at least a rotary shaft thereon, wherein:

• (i) said retainer is made of a non-porous metal or synthetic resin;
• and
• (ii) said retainer is lubricated with a lubricating oil comprising a nondrying vegetable oil.

A rolling bearing for a high-speed rotating equipment, said rolling bearing being provided with a rolling bearing element having an outer ring, an inner ring, rolling elements and a retainer to rotatably support at least a rotary shaft thereon, wherein:

• (i) said retainer is composed of a molded porous synthetic resin body having, at least in a part thereof, a porous portion of a communicated structure;
• and
• (ii) said retainer is lubricated with a lubricating oil comprising an oil-absorbing agent, which is composed of oil-absorbing synthetic resin particles, and a nondrying vegetable oil.

A lubricating oil for a rolling bearing in a high-speed rotating equipment, said lubricating oil comprising at least one nondrying vegetable oil selected from the group consisting of olive oil, arachis oil and oleysol oil, and wherein said nondrying vegetable oil comprises oil-absorbing synthetic resin particles.

A lubricating oil for a rolling bearing in a high-speed rotating equipment, said lubricating oil comprising at least one nondrying vegetable oil and wherein said nondrying vegetable oil comprises at most 5 wt. % of saturated and unsaturated fatty acids not combined with glycerin (free fatty acids) and said nondrying vegetable oil comprises oil-absorbing synthetic resin particles.