This standard specifies the dimensions of the metric four-row tapered roller bearings and the width of the inner and outer spacers. It is suitable for the design, manufacture and selection of four-row tapered roller bearings.
GB/T 300-1995 history
2023GB/T 300-2023 Rolling bearings—Four-row tapered roller bearings—Boundary dimensions
2008GB/T 300-2008 Rolling bearings.Four row tapered roller bearings.Boundary dimensions
1995GB/T 300-1995 Rolling bearings--Four row tapered roller bearings--Boundary dimensions