This standard specifies the classification and structure, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage requirements of cylinder block bearing boring machines. This standard applies to boring machines for repairing engine cylinder block bearings of automobiles, tractors, motorcycles, etc.
GB/T 17421.1 General rules for inspection of machine tools Part 1: Geometric accuracy of machine tools under no-load or quasi-static conditions*, 2023-08-06 Update