... 6,series :2-37,transmission ratio:≥3.838,model no.:R/RF/RM(17/27/37/47/57/67/77 ... /87/97/107/137/147/167)Products overview:1, R series ... .750.18-30.18-30.18-5.50.37-7.50.75-7.50.18-110.55 ... .5-5511-9011-160Transmission ratio3.83-74.843.37-135.093.33-134.823.83-176.884 ... .run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); R series helical gear motor