The overhead camshaft type valve actuating mechanism is generally preferred over the side camshaft type mainly of it’s because of it’s greater rigidity since the camshaft direct the operates the valve instead of operating through push rod and rocker arm. Due to this the valve is open and closely quicker with decreased vibrations and undesirable oscillation. This means increase of high lift, high acceleration cam profile, the valve operation in case of overhead camshaft is much more precise and smooth than in case of the side camshaft valve system. However in case of overhead camshaft with inverted bucker follower, the valve lift is equal to the cam lift, whereas in case of the side camshaft, the cam size has to be relatively larger for the same valve lift, which leads to higher cam to follower velocities and relatives rubbing velocities resulting inside thrust reaction caused by the cam action.
Help to people supply all information Machine and machine parts such as turbine, boiler , car, engine and so on