
Overview
The Kpower RC20P is a coreless robotic servo motor with metal gears for desktop robot arms, educational robots and RC vehicle mechanisms. Its specified torque is 21 kg·cm at 7.4 V, with a no-load speed of 0.2 s/60° at the same voltage. The 40 × 20 × 37 mm body weighs 65 g, while a 25T, Ø6 mm output spline provides the mechanical connection for servo horns.
Features
- Coreless motor and metal gear train.
- Potentiometer position sensing and 180° travel, with customizable travel stated.
- Aluminum-alloy case and two ball bearings (2BB).
- Splined output shaft with a central threaded opening; horn gear spline specified as 25T, Ø6 mm.
- Operating voltage range of 4.8–8.4 V and working frequency of 50–333 Hz.
Specifications
| Parameter | RC20P specification |
|---|---|
| Brand / model | Kpower RC20P |
| Product type | Robotic servo motor |
| Stall torque | 21 kg·cm at 7.4 V |
| Rated torque | 5.3 kg |
| No-load speed | 0.2 s/60° at 7.4 V |
| Weight | 65 g |
| Dimensions | 40 × 20 × 37 mm |
| Travel angle range | 180° (customizable) |
| Operating voltage | 4.8–8.4 V |
| Horn gear spline | 25T, Ø6 mm |
| Output shaft detail | Splined shaft with central threaded opening |
| Gear material | Metal |
| Motor | Coreless motor |
| Protocols listed | PWM | TTL | RS-485 |
| No-load current | 7000 mA |
| Position sensor | Potentiometer |
| Case material | Aluminum alloy |
| Ball bearings | 2BB |
| Working frequency | 50–333 Hz |
| Operating temperature | −10 to 50 °C |
| IP rating | IP42 |
Applications
- Desktop robots and desktop robot arms: actuate compact joints using the 40 × 20 × 37 mm servo body and splined mechanical output.
- Educational and bio-inspired robots: build moving mechanisms with potentiometer position sensing and 180° travel.
- Service robots and solar-panel cleaning robots: provide servo-driven mechanism movement using a coreless motor and metal gears.
- 1/8- and 1/10-scale RC cars: actuate steering or other servo-driven mechanisms with a specified no-load speed of 0.2 s/60° at 7.4 V.
- Fixed-wing drones: actuate control linkages through the 25T, Ø6 mm output spline.
- Medical-device mechanisms: provide servo actuation with potentiometer position sensing.
Documents
- Kpower RC20P Drawing — Drawing (PDF)
- Kpower Servo 3 — Manual (PDF)
- OCServo OCS 351CAN Drawing — Ocservo Ocs 351 Can Drawing (PDF)
Visual Details
Application Examples


Specifications and Performance



Additional Product Details


Setup and Use


Features and Design

Interfaces and Connections



