... 2008 certified 3.12vdc,37.5rpm,5kgf.cm 4.reduction ratio:from1/15 to 1/1051 25mm diameter gear motor is ... voltae:12VDCrotation direction:CW(viewed from output shaft side)reduction ratio:1/217no load speed: 43.8rpm+/-12%no load current ... 50°C and 10~90%RHOther reduction ratio of 25mm gearbox: gearbox length(mm)stadgereduction ratio 1941/15,1/202151/26,1/34 ... ,1/796,1/1051 25mm dc gear motor various ratio