RDS3218 20kg 3-Pole High-Torque Digital Servo – Double Bearing – 180 Degree – Red
At 5V, the servo provides a no-load speed of 0.2 sec/60° with 21.5 kg-cm stall torque, while at 6.8V it reaches 0.17 sec/60° with 25 kg-cm stall torque. Position control uses a standard PWM interface with a 500-2500 µsec pulse-width range, 1500 µsec neutral position, 3 µsec dead-band width, and 50-330 Hz operating-frequency range.
RDS3218 20kg 3-Pole High-Torque Digital Servo – Double Bearing – 180 Degree – Red
Available:In Stock
- Product SKU: LGSV019
₹ 787
₹ 1,699
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Warehouse Details:
Specification
Description
RDS3218 20kg Robot Digital Servo - 180 Degree
The RDS3218 is a 6V robot digital servo designed for controlled angular positioning in robotics and mechanical motion systems. It operates from 4.8V to 6.8V and delivers up to 25 kg-cm stall torque at 6.8V. The servo uses a 342 gear ratio, double-bearing construction, and a 3-pole motor, providing a compact motion-control solution for servo-driven mechanisms.At 5V, the servo provides a no-load speed of 0.2 sec/60° with 21.5 kg-cm stall torque, while at 6.8V it reaches 0.17 sec/60° with 25 kg-cm stall torque. Position control uses a standard PWM interface with a 500-2500 µsec pulse-width range, 1500 µsec neutral position, 3 µsec dead-band width, and 50-330 Hz operating-frequency range.
Technical Details
- Model: RDS3218 Red
- Product Type: 6V 20kg Robot Digital Servo
- Angle Variant: 180 Degree
- Operating Voltage Range: 4.8-6.8V
- Gear Ratio: 342
- Bearing: Double Bearing
- Motor: 3-Pole
- Connector Wire: 300 ± 5 mm
- Waterproof Performance: No
- Control System: PWM (Pulse width modification)
- Pulse-Width Range: 500-2500 µsec
- Neutral Position: 1500 µsec
- Running Degree: 180°
- Dead-Band Width: 3 µsec
- Operating Frequency: 50-330 Hz
- Rotating Direction: Counterclockwise when pulse width increases from 500 to 2500 µsec
Features
- Up to 25 kg-cm stall torque at 6.8V
- 0.17 sec/60° no-load speed at 6.8V
- 4.8-6.8V operating-voltage range
- Digital PWM position control
- 500-2500 µsec control pulse range
- 180° running-angle variant
- Double-bearing mechanical construction
- 342 gear-ratio specification
- 3 µsec dead-band width
- 50-330 Hz operating-frequency range
- 300 ± 5 mm three-wire connection lead
Dimension Drawing

Environmental Conditions
- Storage Temperature Range: -30°C to 80°C
- Operating Temperature Range: -15°C to 70°C
- Operating Voltage Range: 4.8-6.8V
Electrical Specifications
- At 5V - Idle Current (at stopped): 4 mA
- At 5V - Operating Speed (at no load): 0.2 sec/60°
- At 5V - Stall Torque (at locked): 21.5 kg-cm
- At 5V - Stall Current (at locked): 1.6 A
- At 6.8V - Idle Current (at stopped): 5 mA
- At 6.8V - Operating Speed (at no load): 0.17 sec/60°
- At 6.8V - Stall Torque (at locked): 25 kg-cm
- At 6.8V - Stall Current (at locked): 2.5 A
Control Specifications
- Control System: PWM (Pulse width modification)
- Pulse-Width Range: 500-2500 µsec
- Neutral Position: 1500 µsec
- Running Degree: 180°
- Dead-Band Width: 3 µsec
- Operating Frequency: 50-330 Hz
- Rotating Direction: Counterclockwise when pulse width increases from 500 to 2500 µsec
Connector and PWM Wiring
- Connector Type Shown: JR 3-Pin, 2.54 mm Pitch
- Wire-Color Option 1: Brown = Negative (-), Red = Positive (+), Orange = Signal (S)
- Wire-Color Option 2: Black = Negative (-), Red = Positive (+), White = Signal (S)
- Control Interface: PWM
- Control-Signal Level in Illustration: 3.3-5V
- PWM Period Illustration: 3.0-30 ms, Default 20 ms
Connector and PWM Wiring

PWM Position Reference
- Pulse-Width Control Range: 0.5-2.5 ms (500-2500 µsec)
- Neutral Pulse: 1.5 ms (1500 µsec)
- 180° Control Reference: 0.5 ms = 0°, 1.5 ms = 90°, 2.5 ms = 180°
Applications :
- Robot servo positioning systems
- 180° angular positioning mechanisms
- PWM-controlled robotics projects
- Mechanical linkage positioning
- Educational robotics systems
- DIY automation mechanisms
Physical Attributes
- Size: 40 x 20 x 40 mm
- Weight: 99 g
- Gear Ratio: 342
- Bearing: Double Bearing
- Connector Wire Length: 300 ± 5 mm
- Motor: 3-Pole
- Waterproof Performance: No
Package Includes
- 1 x Servo Motor
- 1 x Large U-Shaped Metal Mounting Bracket
- 1 x Small U-Shaped Metal Mounting Bracket
- 2 x Round Metal Servo Adapter Discs
- 1 x Mounting Hardware Set (screws/bolts)