big dc motor Voltage 18V At no load Speed 5580 rpm Current 0.73 amp At stall extrapolation Torque 4627.3 g.cm Current 16.018 amp At maximum efficiency Efficiency62.37 % Speed 4598 rpm Torque 814 g.cm Current3.419 amp Output38.452watts At maximum Output Speed2790 rpm Torque2313.6 g.cm Current8.374amp Output 66.313watts Efficiency43.99 %