To counter this friction, bearings are applied round the shafts. It decreases the friction by rolling movement, which decreases the usage of energy. Equally the counter and primary shafts get the job done With all the aid in the bearing. It had been first launched in 1939 for cars. https://deanxlxlp.mybuzzblog.com/13505639/not-known-factual-statements-about-gearbox