Bis Certification For Self - Aligning Roller Bearings BIS has Introduce IS 6454:1972 which pertains to self-aligning roller bearings. These types of bearings are constructed to adapt to misalignment of the shaft and housing which occurs in cases where deflection of the shaft is present or mounting errors occur. With this standard, self-aligning roller bearings will be produced with the necessary accuracy, load capacity, and reliability required for operations. It is a prerequisite for all manufacturers intending to market these types of bearings in India that they first secure BIS certification which confirms compliance with the standards of quality and safety guidelines set at the national level. In addition, each bearing must be marked with ISI indicating that it is certified by BIS which validates its self-credibility.