40kg.cm Metal Serial Bus Servo, High Precision And Large Torque, With Programmable 360 Degrees Magnetic Encoder and Brushless Motor
40kg.cm Metal Serial Bus Servo, High Precision And Large Torque, With Programmable 360 Degrees Magnetic Encoder and Brushless Motor
The Waveshare ST3025 is a high-performance metal serial bus servo featuring a brushless motor, steel gearbox, and 360° programmable magnetic encoder. With up to 40 kg·cm of torque at 12V, it is built for demanding robotics applications requiring precise position and speed control.
Controllable via UART serial bus, up to 253 servos can be daisy-chained on a single channel. The servo provides real-time feedback on position, load, speed, input voltage, current, and temperature — ideal for closed-loop control systems. Three operating modes (angle servo, speed closed-loop motor, and step mode) make it versatile for a wide range of projects.
Key Features
- 40 kg·cm Torque – High torque output at 12V, suitable for heavy-duty robotic joints
- Brushless Motor – Longer lifespan and quieter operation compared to brushed alternatives
- 360° Magnetic Encoder – 12-bit precision (0.088° resolution, 4096 steps) with no mechanical wear
- UART Serial Bus – Daisy-chain up to 253 servos on one channel, 38400 bps to 1 Mbps baud rate
- Three Operating Modes – Angle servo (0–360°), speed closed-loop motor (continuous rotation), and step mode (relative positioning)
- Two-Way Feedback – Real-time reporting of position, load, speed, voltage, current, and temperature
- Acceleration Control – Configurable speed and acceleration for smooth start/stop motion
- Multi-Loop Position Control – Up to 7 full rotations of position tracking in both directions (default precision)
- One-Button Middle Calibration – Set any position as the centre point for easy installation
- Wide Voltage Input – 6.0–12.6V DC, directly compatible with 3S LiPo batteries
- All-Aluminium Alloy Case – Excellent heat dissipation and mechanical rigidity
- High-Strength Steel Gears – Low noise, high durability under load
- T6061 Aluminium Servo Horns – Corrosion-resistant, included with the servo
- Flat-Shaft Flange Compatible – Mount wheels, timing pulleys, gears, and 6 mm shaft couplings (sold separately)
Specifications
- Model: ST3025
- Input Voltage: 6.0–12.6V DC (typical 12V)
- Stall Torque: 40 kg·cm at 12V
- Torque Constant: 9 kg·cm/A
- No-Load Speed: 0.117 sec/60° (85 RPM) at 12V
- Position Resolution: 0.088° (4096 steps over 360°)
- Static Current: 6 mA
- No-Load Current: 380 mA
- Rated Current: 1.5A
- Stall Current: 4.4A
- Baud Rate: 38400 bps – 1 Mbps (default 1 Mbps)
- ID Range: 0–253
- Gear Type: High-precision steel
- Dimensions: 40 × 20 × 40 mm
Ideal For
- Quadruped and hexapod walking robots
- Robotic arms and grippers
- Pan-tilt camera mounts
- Industrial automation requiring closed-loop control
- Any project needing high-torque, precise servo positioning
Package Contents
- 1× ST3025 Serial Bus Servo
Resources
- Waveshare ST3025 Wiki – Documentation, software, and 3D models
Original: $127.44
-70%$127.44
$38.23Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Waveshare ST3025 is a high-performance metal serial bus servo featuring a brushless motor, steel gearbox, and 360° programmable magnetic encoder. With up to 40 kg·cm of torque at 12V, it is built for demanding robotics applications requiring precise position and speed control.
Controllable via UART serial bus, up to 253 servos can be daisy-chained on a single channel. The servo provides real-time feedback on position, load, speed, input voltage, current, and temperature — ideal for closed-loop control systems. Three operating modes (angle servo, speed closed-loop motor, and step mode) make it versatile for a wide range of projects.
Key Features
- 40 kg·cm Torque – High torque output at 12V, suitable for heavy-duty robotic joints
- Brushless Motor – Longer lifespan and quieter operation compared to brushed alternatives
- 360° Magnetic Encoder – 12-bit precision (0.088° resolution, 4096 steps) with no mechanical wear
- UART Serial Bus – Daisy-chain up to 253 servos on one channel, 38400 bps to 1 Mbps baud rate
- Three Operating Modes – Angle servo (0–360°), speed closed-loop motor (continuous rotation), and step mode (relative positioning)
- Two-Way Feedback – Real-time reporting of position, load, speed, voltage, current, and temperature
- Acceleration Control – Configurable speed and acceleration for smooth start/stop motion
- Multi-Loop Position Control – Up to 7 full rotations of position tracking in both directions (default precision)
- One-Button Middle Calibration – Set any position as the centre point for easy installation
- Wide Voltage Input – 6.0–12.6V DC, directly compatible with 3S LiPo batteries
- All-Aluminium Alloy Case – Excellent heat dissipation and mechanical rigidity
- High-Strength Steel Gears – Low noise, high durability under load
- T6061 Aluminium Servo Horns – Corrosion-resistant, included with the servo
- Flat-Shaft Flange Compatible – Mount wheels, timing pulleys, gears, and 6 mm shaft couplings (sold separately)
Specifications
- Model: ST3025
- Input Voltage: 6.0–12.6V DC (typical 12V)
- Stall Torque: 40 kg·cm at 12V
- Torque Constant: 9 kg·cm/A
- No-Load Speed: 0.117 sec/60° (85 RPM) at 12V
- Position Resolution: 0.088° (4096 steps over 360°)
- Static Current: 6 mA
- No-Load Current: 380 mA
- Rated Current: 1.5A
- Stall Current: 4.4A
- Baud Rate: 38400 bps – 1 Mbps (default 1 Mbps)
- ID Range: 0–253
- Gear Type: High-precision steel
- Dimensions: 40 × 20 × 40 mm
Ideal For
- Quadruped and hexapod walking robots
- Robotic arms and grippers
- Pan-tilt camera mounts
- Industrial automation requiring closed-loop control
- Any project needing high-torque, precise servo positioning
Package Contents
- 1× ST3025 Serial Bus Servo
Resources
- Waveshare ST3025 Wiki – Documentation, software, and 3D models
