This series of disc feeder, mainly consists of the motor, the drive, the disc is composed of three parts. Feeder and belt conveyor driven by a drive, the drive clutch has realization of feeder opening, stops and both function conversion functions. Belt conveyor belt speed measurement is less than 1M/s, to measure speed with speed detection devices, in order to prevent the weighing rollers oblique have a test rod for adjustment. With energy conservation, less compact structure, small size, simple installation, low maintenance, and other notable features. Disc feeder is suitable for 20mm powder feeding device.