Bis Certification For Double Row Cylindrical Roller Bearings The Bureau of Indian Standards (BIS) has specialized in double row cylindrical roller bearings with the IS 6458:1972 standard. These bearings are used in heavy rotating machines that require high radial load capacity and rigidity and precision accuracy. This type of bearing must be BIS certified to be sold in India, which proves that it meets all the criteria set by BIS in terms of safety, quality and operation. In addition, each certified bearing must have the ISI mark which proves its reliability and compliance.