Feature:1. High‑purity copper windings can maximize efficiency, accuracy designed for maximum energy conversion.2. The precisely balanced rotor, with high smoothness, can achieve the best reliability and maximum speed.3. Double ball bearings, balanced speed, low noise, movable/replaceable structure, easy to clean and maintain.4. High‑strength magnets provide unparalleled brush motor performance, excellent and long life.5. Direct welding wiring guide, providing flexible welding options, high performance.Specification:Item Type: 550 Brushed MotorMaterial: Carbon Steel + CopperColor: BlackMotor Shaft Size: Approx. 3.175mm/0.125inShaft Length: Approx. 12mm/0.5inMotor Diameter: Approx. 35.9mm/1.4inMotor Length: Approx. 48.6mm/1.9inWeight: Approx. 252.0g/8.9ozNo-Load Speed: 13000 ± 12%RPMNo-Load Current: <1.3AVoltage: 7.4V-11.1VBlocking Current: 10.3-51.9ATorsion: ≥2190.4g.cmConnection: for CCWFitment:Fit for 1/10 RC CarFit for 1/12 RC CarInstallation and Maintenance:1. lf replacing the motor mounting screws , use the same type and size that your vehicle was equipped with originally2.Do not over-tighten the motor mounting screws . Doing so may strip the mounting hole threads.3.Connect the + and-motor leads to the corresponding leads on your Electronic Speed Control ( ESC ).4.To clean your motor , lightly brush dirt away on a regular basis paying particularly close attention to the areasaround the ball bearings . DO NOT spray cleaners or solvents into the motor.5.On a reqular basis , inspect the brushes to be sure they move freely within their hoods.6.When the brushes become worn , or if they display signs of color change, replace the