Abstract: A lubricant composition includes a perfluoropolyether as a base oil, a fluororesin as a thickener, and a polyol ester, a urea grease and a zinc dialkyldithiophosphate as additives, wherein a mass ratio of content of the perfluoropolyether to total content of the polyol ester and the urea grease ranges from 78/22 to 95/5, a mass ratio of content of the perfluoropolyether to content of the polyol ester ranges from 90/10 to 96.5/3.5, a mass ratio of content of the polyol ester to content of the urea grease ranges from 40/60 to 65/35, content of the fluororesin ranges from 15 mass % to 24 mass % based on a total amount of the lubricant composition, and content of the zinc dialkyldithiophosphate ranges from 0.5 mass % to 4 mass % based on the total amount of the lubricant composition.

Abstract: A lubricant composition includes a perfluoropolyether as a base oil, a fluororesin as a thickener, and a polyol ester, a urea grease and a zinc dialkyldithiophosphate as additives, wherein a mass ratio of content of the perfluoropolyether to total content of the polyol ester and the urea grease ranges from 78/22 to 95/5, a mass ratio of content of the perfluoropolyether to content of the polyol ester ranges from 90/10 to 96.5/3.5, a mass ratio of content of the polyol ester to content of the urea grease ranges from 40/60 to 65/35, content of the fluororesin ranges from 15 mass % to 24 mass % based on a total amount of the lubricant composition, and content of the zinc dialkyldithiophosphate ranges from 0.5 mass % to 4 mass % based on the total amount of the lubricant composition.

Abstract: The inner races 11 of ball bearings 7a, 7b are securely fitted by interference fit onto the portion of a rotatable shaft 5 whose outer diameter is not changed over the axial direction in order to support the rotatable shaft 5 in a motor case 4. In this state, the above respective ball bearings 7a and 7b are preloaded. The temperature of the above inner races 11 can reach 130? or a higher temperature in use. These inner races 11 are made of a steel containing its retained austenite in an amount of up to 4% by volume. The interference of the inner races 11 with the above rotatable shaft 5 is secured by inhibiting enlargement of the above inner races 11 in inner diameter due to the decomposition of the retained austenite. Accordingly, an air conditioning apparatus for automobile is realized with a structure which can be manufactured at a low cost, securing preload even in a high temperature environment, without giving riders discomfortable feeling.