Parvalux has added a range of planetary gearboxes and combined motors to its range. The high torque motor and gearbox combinations are available in diameters of 28mm, 36mm, 45mm, 56mm, 72mm and 82mm, with up to four stages offering reduction ratios from 3.7:1 up to 720:1. They offer a high torque-to-size ratio, producing in excess of 120Nm frmo the larger 82mm diameter unit, at input speeds of up to 4,000rpm. Various lengths of motor are available in each diameter, with shaft options to suit customer’s individual requirements.