... screw, asymmetrical open flume type barrel. Configuration of the gearbox: strengthen thrust bearing, high torque output; the gear is ... hard teeth surface, grinding teeth; the gearbox is with high quality, big torque, high speed, low temperature, low noise, long ... /mindriving motor power: 3KW FUJI frequency inverter frequency-variable speed regulatorgearbox: slanted gear, hard teeth surface (China and ...