electric dc motor 1)UL,CE 2)220v,150w,1900rpm,Dia:113mm 3)Widely ... used 4)High efficiency, easy adjust speed,low price electric ... and dyeing, metallurgy, rubber, fibre drawing, extrusion machinery, medical machinery, food processing, printing and packing.2)Outfitted with speed ... achieve stepless adjustment of speed with constant torsion. Electric DC motor