Welcome to the store! High Torque Rotor Design: The brushless motor features a 4-pole 12-slot high-torque rotor design, offering low friction, low noise, high accuracy, strong torque, and stable output. Applicable: The motor has a 3.175mm shaft, suitable for all 1/10 brushless cars, with M3 screws for various installation methods. Aluminum CNC Shell: This brushless motor boasts a high-hardness aluminum CNC shell, high-temperature resistant copper coil, and 0.35mm thick silicon steel sheet for high magnetic permeability, high silicon content, good insulation, and heat resistance. Built-in Temperature Sensor: The brushless motor includes a built-in explosion-proof rotor, high-toughness stainless steel shaft, and high-precision premium bearings for super durability. The motor has a built-in temperature sensor and interface, which can be used with the ESC for motor overheat protection. Detachable: The detachable structure design is convenient for cleaning and maintenance, effectively extending the motor's lifespan and improving work efficiency. Item Type: RC Car Brushless Motor Material: Aluminum Alloy, Copper, and Steel Gross Weight: 188g/6.6oz Model: F540 Color: Black and Red KV (RPM/Volt): 3930KV Output Power: 820W Maximum Voltage: <13V Maximum Current: 63A Number of Motor Poles: 4 IO: 2.2A Resistance (Ω): 0.0191 Maximum Speed: 50000 Motor Diameter: 35.8mm/1.4in Motor Length: 50mm/2.0in, without shaft Shaft Diameter: 3.175mm/0.125in Shaft Length: 15mm/0.59in Applicable: For all 1/10 brushless cars 1 x F540 Brushless Motor 4 x Screw 1 x Instruction