FEETECH FT870B Servo Motor

The FT-870B-C001 is a high-performance 7.4V 75KG-class digital servo driven by an advanced 4-pole brushless motor and housed in a rugged aluminum case for optimized cooling and structural strength. Engineered for heavy-duty applications, it features ultra-durable titanium gears with a 1/356 gear ratio, smooth ball bearings, and a standard 25T/5.9mm horn gear spline. Supporting a flexible 6–9V operating voltage range, it delivers a massive peak stall torque of 75kg.cm and a rated torque of 18.75kg.cm at 8.4V, achieved at a rapid no-load speed of 0.142sec/60° (70RPM). Controlled via a digital comparator system using pulse width modulation (500–2500 µsec), this smart servo ensures a highly precise 180°±5° running degree with counterclockwise rotation, a dead band width of ≤4 µsec, and no mechanical limit angles. Weighing 78.8±1g with a 30±0.5CM connector wire, it offers an exceptional power-to-weight ratio for competitive robotics, industrial automation, and heavy-duty unmanned vehicles.

Common use cases: Humanoid robot knee and hip joints, heavy-duty robotic arm elbow actuators, large-scale UAV payload gimbals, competitive combat robots, and RC crawler/truck steering systems requiring 75kg.cm torque with brushless longevity and titanium gear durability.