Space rolling bearing and space strain wave gearing device

A space rolling bearing comprising:

• an inner ring, an outer ring, and a plurality of rolling elements disposed in a rollable state between the inner ring and the outer ring;
• lubricated by a solid lubricant coating or a solid lubricant powder;
• and configured to be used in a low-temperature vacuum environment,
• wherein
• the inner ring is formed from a bearing steel,
• the outer ring is formed from a martensitic stainless steel,
• the rolling elements are formed from ceramics,
• a surface of the inner ring has a first portion where the rolling elements roll and a second portion excluding the first portion where the rolling elements do not roll,
• a ceramic rust-preventive coating is formed on at least a part of the second portion and is not formed on the first portion which is free of any ceramic rust-preventive coating, and
• the ceramic rust-preventive coating is a ceramic coating formed by aerosol deposition.