This standard specifies the minimum chamfer dimensions of flat retaining rings of single row cylindrical roller bearings of diameter series 0, 2 and 3 and rings without ribs. These chamfer dimensions are the same as the minimum chamfer dimensions specified in GB/T 273.3-1988 different.
GB/T 20057-2006 history
2012GB/T 20057-2012 Rolling bearings.Single-row cylindrical roller bearings.Chamfer dimensions for loose rib and non-rib sides
2006GB/T 20057-2006 Rolling bearings.Single-row cylindrical roller bearings.Chamfer dimensions for loose rib and non-rib sides