Types of Balance. Poor performance will be obtained regardless of the type of cutter head and knives you are running unless they are kept properly balanced at all times. Sets up vibration which will give poor quality work. Causes excessive and uneven pressure on the bearings which will greatly reduce their life. Causes much greater noise than properly balanced cutters.
Static balance is the balance of bodies at rest.
Thus, static balancing has to do with weight and its projection from the axis of rotation. In this case a projection of the knives on the head. Two cutters, mounted on a head statically balanced, could be of the same length, width, thickness, shape and weight. They could be bolted on the opposite side of the head, with the same projection, but not directly opposite each other, and they would be of static balance. However, they would not be of dynamic balance unless they were placed exactly opposite each other and were of the same projection, weight, etc. as mentioned above.