Knowledge of the role of a balancing machine purchase, balancing machine: a balanced rotor produces a pressure on its support structure and the rotor itself in its rotation, and cause vibrations. Thus, the balance of the rotor is very necessary. Rotor balancing machine is to be carried out under the state balancing check rotation, balancing the role are:? To improve the quality of products consisting of a rotor and reduce vibration noise reduction to improve the support member (bearing) reduce the life???? ? user discomfort reduce the power consumption of two goods, jargon balancing machines: the initial imbalance is defined as: pre-balanced rotor unbalance exists. The minimum achievable residual unbalance (Umar) is defined as: balancing machine enables the rotor reaches the minimum residual unbalance. Is a measure of the maximum balance balancing machine performance. When the indicator is represented by the imbalance degrees, called the minimum achievable residual unbalance. (Units gmm / kg) reduced the rate of unbalance (URR) is defined as: a balance correction after the reduction in the initial unbalance unbalance the ratio. It is a measure of the efficiency of the balancing machine performance, expressed as a percentage: URR (%) = (U1-U2) / U1 = (1-U2 / U1) X 100 where ': U1- initial unbalance; U2- a balance residual imbalance corrected