What is the best method of making unbalance compensation?

The unbalance is compensated first in design, then either by addition of weight or removal of weight. The design requirement of the component is the best guide to carry out the compensation. The weight can be removed for balancing by drilling, milling, grinding etc if the amount of unbalance compensation is less and there is a provision in the design. In case of heavy unbalance, the compensation weight is welded or bolted to the component, since removal of heavy unbalance may weaken the component and render it useless. From the safety point of view also, it may not be advisable to remove too much material.