Feature:1. Standard specification 550 high torque and low noise brushed motor for RC car and boat.2. The front part is ball bearing with high precision and long service life; Lengthened oil bearing shaft at tail, low noise and long service life.3. Extended oilbearing sleeve at the tail, low noise, builtin cooling fan, with degaussing sleeve outside.4. Internal rotor adopts multipole winding, with strong torque and lowspeed performance. Ordinary 3winding rotor motor has finer linearity.5. There are 4 different types available, you can choose by your needs.Specification:.Condition: 100% Brand NewItem Type: Brushed MotorMaterial: Metal Optional Type: 12T, 21T, 29T, 35T Size: 550Color: BlackAxle Diameter: D Axle 3.175mmOutput Shaft Length: Approx. 15mm / 0.6inOuter Diameter: Approx. 36mm / 1.4inBody Length: Approx. 60mm / 2.4inDistance of Mounting Hole: Approx. 25mm / 1inScrew Hole: Approx. 3mm / 0.1inFitment: Fit for 4 Series Car Model Fit for 6 Series Car Model 12TNo loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)314.436.270Efficiency(%)7351Output Power(W)78137RPM2250018600112500Torque(G.CM)41011902370Voltages(V)7.4VTemperature105021T No loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)1724.748.3Efficiency(%)7749.5Output Power(W)4091RPM12900113006450Torque(G.CM)35013702730Voltages(V)7.4VTemperature105029T No loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)16.32039.1Efficiency(%)72.847.8Output Power(W)3471RPM1050090505250Torque(G.CM)37013202630Voltages(V)7.4VTemperature105035T No loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)0.63.812.524.3Efficiency(%)76.149.7Output Power(W)2246RPM790068303950Torque(G.CM)31011302260Voltages(V)7.4VTemperature1050Package List:1 x Brushed MotorNote:1. Please allow 13mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Product wire shipped without welding, splashing proof, can not soak in water.4. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.