Balancing machine connected in series with driving unit

PURPOSE: A balancing machine serially connected to a driving unit is provided to directly transmit the torque of the driving unit without loss, thereby improving the reliability of a test. CONSTITUTION: A balancing machine serially connected to a driving unit includes a rotary shaft(110), a driving unit(120), and a connection unit(130). The rotary shaft is inserted into a rotator. The driving unit is interlocked with the rotary shaft and applies the torque to the rotary shaft. One side of the connection unit is connected to the rotary shaft, and the other side of the connection unit is connected to the driving unit. The connection unit transmits the torque to the rotary shaft. The connection unit includes a joining unit(140) and a fastening unit(150). The joining unit includes an insertion unit(141) in which the rotary shaft is inserted and joined on one end. [Reference numerals] (120) Driving unit