Carbon brush dc motor Diameter 35.5mm,Length 50mm,Shaft 3.175mm Voltage: 3. ... motors models RS-540 or RS-545, Carbon brush dc motor, Cylinder, Diameter35.5 mm, length 50 mm; shaft 3.175 ... , fixing screw 2-M3.0 mm. Operating voltage: 3.6~60V, At no load Speed 2,000~25,000 r.p ... .040.09,2500.128,0650.6420016.5664.71,561 DC Motor RS-540 & RS-545