INA Bearings India Pvt. Ltd. Manufactures Balance Shaft Damper Used to Reduce Vibrations. INA Bearings India Pvt. Ltd. Is an ISO / TS 16949:2002 and ISO 9001:2008 certified company. Balance Shaft Damper Used to Reduce Vibrations is generally chain-driven. The damper can be integrated both into the driving chain pulley on the crankshaft and into a pulley which drives the balance shaft. There are usually only minor modifications required to adjacent parts. In principle, Balance Shaft Damper Used to Reduce Vibrations comprises a chain pulley and hub between which bow springs exert a slight rigidity.