Overview
The FEETECH SM80BL Servo Motor is an RS485 serial bus brushless servo available in two variants: SM-80BL-C001 (12V, 80kg.cm peak stall torque) and SM-80BL-C002 (24V, 85kg.cm peak stall torque). It features a 4 Pole Brushless motor, steel gear train, ball bearings, and an aluminium case. The servo provides comprehensive feedback (load, position, speed, input voltage, current, temperature), a 25T/OD5.9mm horn gear spline, and a 40CM connector wire, making it suitable for precise, durable actuation in robotics and automation.
Key Features
- RS485 serial bus control with Half Duplex Asynchronous Serial Communication
- 4 Pole Brushless motor with steel gears and ball bearings
- Peak stall torque up to 80kg.cm@12V (C001) and 85kg.cm@24V (C002)
- No limit angle; 360° running degree with high-resolution position sensing
- Comprehensive feedback: load, position, speed, input voltage, current, temperature
- 25T/OD5.9mm horn gear spline; aluminium case; 40CM connector wire
- Communication speed adjustable from 38400bps to 1 Mbps; ID range 0–253
Specifications
| Parameter | SM-80BL-C001 | SM-80BL-C002 |
|---|---|---|
| Product Name | 12V 80kg RS485 Serial Bus Servo | 24V 85kg RS485 Serial Bus Servo |
| Storage Temperature Range | -30℃~80℃ | -30℃~80℃ |
| Operating Temperature Range | -20℃~80℃ | -20℃~60℃ |
| Size | A:46.5mm B:28.5mm C:34mm | A:46.5mm B:28.5mm C:34mm |
| Weight | 97.5±1g | 97.5±1g |
| Gear Type | Steel | Steel |
| Limit Angle | No limit | No limit |
| Bearing | Ball bearings | Ball bearings |
| Horn Gear Spline | 25T/OD5.9mm | 25T/OD5.9mm |
| The Rocker Phantom | 0° | 0° |
| Case | Aluminium | Aluminium |
| Connector Wire | 40CM | 40CM |
| Motor | 4 Pole Brushless motor | 4 Pole Brushless motor |
| Operating Voltage Range | 12V | 24V |
| Idle Current (at stopped) | 45mA@12V | 40mA@24V |
| No Load Speed | 0.161sec/60° (62RPM)@12V | 0.142sec/60° (70RPM)@24V |
| Running Current (at no load) | 280mA@12V | 180mA@24V |
| Peak Stall Torque | 80kg.cm@12V | 85kg.cm@24V |
| Rated Current | 1475mA@12V | 975mA@24V |
| Rated Torque | 20kg.cm≤@12V | 21kg.cm≤@24V |
| Stall Current | 5.9A@12V | 3.9A@24V |
| Command Signal | Digital Packet | Digital Packet |
| Protocol Type | Half Duplex Asynchronous Serial Communication | Half Duplex Asynchronous Serial Communication |
| ID Range | 0-253 | 0-253 |
| Communication Speed | 38400bps ~ 1 Mbps | 38400bps ~ 1 Mbps |
| Running Degree | 360°(when 0~4095) | 360°(when 0~4096) |
| Feedback | Load, Position, Speed, Input Voltage, Current, Temperature | Load, Position, Speed, Input Voltage, Current, Temperature |
| Position Sensor Resolution | 0.088°(360°/4095) | 0.088°(360°/4096) |
Applications
- Humanoid Robots
- Robotic Arms
- Exoskeletons
- Quadruped Robots
- AGV Vehicles
- ARU Robots
Manuals
SM85CL Product_structure_diagram.pdf
SM85CL Product_Specification.pdf
Details



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