Output Torque
The torque delivered at the output shaft of a gearbox — the usable rotational force available after gear reduction, accounting for the gear ratio and efficiency.
Definition
Output torque is the torque actually delivered at the output shaft of a gearbox or drive system. It is derived from the input torque applied at the input, multiplied by the gear ratio and the efficiency of the gearbox. A higher gear ratio increases the output torque while proportionally reducing the output speed.
In drive technology, output torque is one of the central design parameters. It determines what load a drive system can actually move. When selecting a gearbox, the required output torque must be known in order to choose the appropriate rated torque of the gearbox and to avoid overload. Starting torques, peak loads, and continuous operation all factor into the calculation.
Practical Relevance
When designing gearboxes for conveyor systems, robot drives, or machine tools, output torque is the decisive parameter. It must always exceed the maximum required load torque, plus a safety factor of typically 1.5 to 2.0. Exceeding the rated output torque leads to premature wear or gearbox failure.