Second Method:

In this method, rather than neutralising centrifugal force, the eccentricity or radius 'r' is dropped. By doing this, we intend to drop the magnitude of the centrifugal force. This technique is utilized for thicker discs as flywheel where this is possible to take out mass through shallow drilling. The side of the disc that consists of centre of gravity is known as heavy side as illustrated in Figure 3(a). The opposite side to the heavy side is known as light side. As heavy side consists of more mass, the mass M₁ as given by the Equation (5) may be taken out by drilling a shallow hole of diameter 'd' and depth 'b' is specified by the following relation

 Where 'b' is equal to less than thickness of the disc and ρ is equal to density of material.