Doga 259 series worm drive geared dc motors doga 259 3710 30 00 a brushed dc motor from the doga 259 series ideal for variable speed applications its worm drive gearbox provides an effective brake against turning or over run when power is switched off and free movement is undesirable doga 259 3710 30 00 24v dc geared motor 22rpm 20nm 50 1