37mm dc gear motor: 1.Rated Voltage:3-24V 2.Speed: 3-1500RPM 3.Stall Torque: 50kg.cm 4.Reliable performance,Large torque 37mm dc motor with gear box,with planetary gearbox,Can be equipped with encoder 1.Widely used in robot,lock. Auto shutter, USB fan,Slot machine,Money detector, Coin refund devices,Currency count machine, Towel dispensers, Automai\tic doors,Peritoneal machine,Automatic TV rack, ...