Balancing

—In mechanics, the removal of irregularities in weight from those portions of a revolving body where it is in exce , in order to equalize the strains upon it due to momentum and centrifugal force. Hence, rapidly revolving pulleys and wheels are, where po ible, turned all over. When that is not practicable they are hung on a free spindle and the weight of the heaviest sides reduced in succe ion by drilling out holes, or in other ways removing superfluous metal. Such a pulley or wheel is then said to be balanced. Another mode of balancing is when a balance weight is attached to a driving or a flywheel to counter-balance the ma of a crank, or an eccentric sheave, or similar projecting portion on the axle. All good mechanisms and rapidly revolving parts are thus balanced.