Features 1、Applicability: The RC brushless motor supports universal installation, has a 3.175mm output shaft, and is suitable for all 1/10 brushless cars. There are M3 screws and other various installation methods. 2、High Torque Rotor: This RC motor adopts 4 poles 12 slot high torque rotor design, with low friction, low noise, high accuracy, strong torque and stable output power. 3、High Performance: The motor uses high hardness aluminum CNC shell, high temperature resistant copper coil and 0.35mm thick silicon steel sheet, which has high permeability, high silicon content and good insulation and heat resistance. 4、Overheat Protection: The built in temperature sensor and interface of the motor can realize the overheat protection function of the motor when matched with the electric regulator. 5、Durable: The motor adopts explosion proof rotor, high toughness stainless steel output shaft, high accuracy and premium bearing, and the removable structural design is convenient for cleaning and maintenance, effectively extending the service life of the motor and improving work efficiency. Item Type: RC brushless motor Material: Aluminum alloy, copper, steel Weight: Approx. 188g/6.6oz Model: F540 Color: Black red KV(RPM/V): 3100KV Output Power: 820W Maximum Current: 48A Number of Motor Poles: 4 IO: 1.6A Resistance(Ω): 0.0324 Maximum Speed: 50000 Motor Diameter: 35.8mm/1.4in Motor Length: 50mm/2in(Excluding shaft) Shaft Diameter: 3.175mm/0.13in Shaft Length: 15mm/0.6in Applicable: All 1/10 brushless car Package List 1 x RC Brushless Motor 4 x Screw 1 x Instructions