This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. for main bearing bushes and connecting rod bushes used in mini-car gasoline engines. This standard applies to main bearing bushes and connecting rod bushes (hereinafter referred to as bearing bushes) for minicar gasoline engines.
HBm 65.12-1988 history
1988HBm 65.12-1988 Specifications for Main Bearing and Connecting Rod Bearings of Miniature Automobile Gasoline Engines