Home / Standards / GB/T 6445 GB/T 6445 Active Rolling bearings—Needle roller bearing track rollers—Boundary dimensions, geometrical product specifications (GPS) and tolerance values 滚动轴承 滚轮滚针轴承 外形尺寸、产品几何技术规范（GPS）和公差值 Standard Type GBT ICS 21.100.20 CCS J 11 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会