WHAT IS BALANCING OF INERTIA FORCES?

The high speeds of rotation at which modern machines and engines are required to operate, has made it increasingly important that all revolving and reciprocating parts are as completely balanced as possible. Not only are the bearing loads and stresses in components increased by out of balance dynamic forces but there is also the possibility of causing significant harmful vibrations. On the railways these were called "Hammer Blows" and they were reduced by casting Balancing weights into the driving wheels. These can be clearly seen in the photograph at the bottom of the wheels

On road transport wheels are routinely balanced by adding small weighs around the rim. These improve wheel bearing life but more importantly prevent vibrations being set up in the steering system which are at best unpleasant and at worst very dangerous.

BALANCE AT SAME PLANE

BALANCE AT DIFFERENT PLANE