ITEM NAME:3-6V DC Short shaft torque reducer speed Transmission Engine N6F1 3-6V DC Short shaft torque reducer speed Transmission Engine N6F1 Voltage range: 3-6V DC No load speed: 40 +/- 10% RPM Ambient temperature: -5 to 40 Celsius Rotation: Positive pole contact "+" negative pole "-" contact idle current: 0.018A (0.036A Max.) Load Torque: 0.5 kg. cm Charging current: 0.06A (0.09A Max.) Loading twist: 31.4 +/- 10% RPM Rotor Current: 0.29A Rotor Torque: 2.3 kg. cm Axial clearance: 0.3 mm or less Motor idle current: 0.030A Idle engine speed: 11,500 RPM +/- 10% Shaft length: Approx. 0.25 / 6.35 mm Shaft diameter: 0.12 inch / 3 mm Total size (L x W x T): Approx. 1.3 x 0.5 x 0.4" / 3.2 x 1.2 x 1 cm Material: copper + aluminum Package includes: 1 x engine gearbox Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.