4U-1A potato machine is matched with the hand tractor,it has the high working efficiency,low breakage rate,simple structure and long useful life. The technical paraments for this machine is as follows: Model 4U-1A Row number Single row(with hand tractor) Row spacing(cm) 50-60 Productivity(mu/hr) 3-5 Total weight(KG) 100 Matching power(HP) 8-15 Working depth(cm) 20 Working width(m) 0.53 Potato-exposing rate >96% Breakage rate <2% REV of power take-off shaft(RPM) 1000 Overall dimension(cm) 90*70*70 Packing size(cm) 85*70*65