This standard applies to double-row spherical roller bearings with asymmetric rollers (hereinafter referred to as bearings), manufactured in accordance with GOST 520, and establishes their classification by design and mounting dimensions, instructions for use and operation, as well as technical requirements for this group of homogeneous products
GOST 5721-2022 history
2023GOST 5721-2022 Rolling bearings. Radial spherical double-row roller bearings with asymmetrical rollers. General technical requirements