RDS3115 Digital Servo Motor – 15kg Metal Gear
The RDS3115 Digital Servo Motor is a high-torque servo designed for robotics, mechanical automation, and DIY electronic projects. Featuring durable metal gears, dual ball bearings, and a programmable digital control circuit, it delivers reliable positioning and smooth movement.
With a rated torque of 15kg·cm at 4.8V and 17kg·cm at 6.8V, the RDS3115 is suitable for robotic arms, grippers, steering mechanisms, and other applications requiring strong and precise servo movement.
The servo operates from 4.8V to 6.8V and supports standard servo PWM control, making it suitable for Arduino, ESP32, Raspberry Pi, and compatible servo controllers.
Key Features
-
High Torque: Up to 17kg·cm at 6.8V.
-
Durable Metal Gears: Designed for improved strength and durability.
-
Digital Servo Control: Programmable digital amplifier with MOSFET drive.
-
Dual Ball Bearings: Support smooth shaft rotation and mechanical stability.
-
Fast Response: Operating speed of 0.14 seconds per 60° at 6.8V.
-
Wide Operating Voltage: Supports 4.8V to 6.8V DC.
-
Low-Noise Operation: Designed for smoother and quieter movement.
-
Standard PWM Control: Compatible with common servo controllers.
-
Robotics Ready: Suitable for robotic arms, grippers, steering systems, and mechanical assemblies.
Technical Specifications
| Parameter |
Specification |
| Model |
RDS3115 |
| Motor Type |
Digital Servo Motor |
| Gear Material |
Metal |
| Bearing Type |
Dual Ball Bearing |
| Operating Voltage |
4.8–6.8V DC |
| Torque at 4.8V |
15kg·cm |
| Torque at 6.8V |
17kg·cm |
| Speed at 5V |
0.16s / 60° |
| Speed at 6.8V |
0.14s / 60° |
| Control Signal |
Servo PWM |
| Servo Dimensions |
40 × 20 × 40.5mm |
| Bracket Assembly Dimensions |
64 × 55.6 × 20mm |
| Servo Weight |
Approximately 60g |
| Cable Length |
Approximately 320mm |
| Control Circuit |
Digital Amplifier with MOSFET Drive |
Pin Configuration and Connection
The RDS3115 uses a standard three-wire servo connection.
| Connection |
Function |
| VCC |
4.8–6.8V DC Power |
| GND |
Ground |
| Signal |
PWM Control Signal |
Example Connection with Arduino UNO
| RDS3115 Servo |
Arduino UNO / Supply |
| VCC |
External 5–6V DC Supply |
| GND |
External Supply GND and Arduino GND |
| Signal |
Arduino D9 |
Important: Use a suitable external power supply for the servo. Do not power a high-torque servo directly from the Arduino 5V pin.
Applications
- Robotic Arms
- Robot Grippers
- Humanoid Robots
- RC Vehicles
- Steering Mechanisms
- Mechanical Automation
- Pan-and-Tilt Systems
- DIY Robotics Projects
- Educational Mechatronics
- Servo-Controlled Mechanisms
Important Notes
- The servo requires a regulated 4.8–6.8V DC power supply.
- Use an external power source capable of handling the servo's peak current demand.
- Connect the servo controller and power supply grounds together.
- The specified torque values are rated torque figures from the supplied product information; they should not be treated as guaranteed continuous operating torque.
- Avoid prolonged mechanical stalling, which can cause overheating or damage.
- Confirm the servo's supported rotation angle before configuring mechanical limits.
- Servo positioning is controlled using PWM signals, not a conventional DC motor driver.
- For ESP32 and Raspberry Pi applications, use a compatible servo control signal and suitable external power supply.
Package Includes
- 1 × RDS3115 Digital Servo Motor
- Metal Mounting Brackets
- Mounting Screws and Accessories
