
Overview
The Kpower HBL835 is a brushless digital servo for desktop robot arms, RC car models and positioning mechanisms. Its aluminum-alloy case and metal gears combine with a compact 40 × 20 × 38 mm footprint and 66 g weight. Torque is specified at 13.8 kg·cm at 6.0 V and 15.6 kg·cm at 7.4 V, with corresponding speeds of 0.12 and 0.10 s/60°.
Features
- Brushless digital servo with an aluminum-alloy case.
- High-precision metal gears and two ball bearings (2BB).
- Potentiometer position sensing.
- 25T output spline with a 5.9 mm diameter.
- 120° travel range, with customization stated for the travel angle.
- HBL835 version; classified as a high-torque model.
Specifications
Voltage-Specific Performance
| Parameter | At 6.0 V | At 7.4 V |
|---|---|---|
| Torque | 13.8 kg·cm | 15.6 kg·cm |
| Speed | 0.12 s/60° | 0.10 s/60° |
Mechanical and Electrical Specifications
| Parameter | Value |
|---|---|
| Brand / model | Kpower HBL835 |
| Servo type | Brushless digital servo |
| Nominal torque, voltage unspecified | 15 kg·cm |
| Rated torque | 3.5 kg; lever-arm unit unspecified |
| No-load speed, voltage unspecified | 0.10 s/60° |
| Weight | 66 g |
| Dimensions | 40 × 20 × 38 mm |
| Travel angle range | 120°; customizable |
| Operating voltage | 4.8–8.4 V |
| Horn gear spline | 25T, Ø5.9 mm |
| Gear material | Metal |
| Motor | Brushless |
| Listed protocols | PWM, TTL and RS-485; interface implementation for the offered configuration is unspecified |
| No-load current | 4100 mA |
| Position sensor | Potentiometer |
| Case material | Aluminum alloy |
| Ball bearings | 2BB |
| Working frequency | 50–333 Hz |
| Operating temperature | −10 to 50 °C |
| Ingress protection rating | IP42 |
Applications
- Desktop robot arms and STEAM education: build compact positioning mechanisms using the 120° travel range and 40 × 20 × 38 mm body.
- 1/5-scale RC car models: actuate control linkages using the metal gear train and voltage-specific torque and speed ratings.
- Industrial valves and automation: drive limited-angle positioning mechanisms with potentiometer feedback and a 25T output spline.
- Smart bidets: position mechanical elements using the compact brushless servo assembly.
- UAV projects: actuate positioning mechanisms where the 66 g weight and specified operating range suit the design.
- Underwater robot projects: use the compact servo in appropriately protected actuator assemblies. The servo is rated IP42, not for direct immersion.
- Medical equipment and endoscope development: use the compact body and limited-angle motion for mechanical positioning tasks within an engineered device design.
Documents
- Kpower HBL835 Drawing — Drawing (PDF)
- Kpower Servo 3 — Manual (PDF) — DMC-026 filename
- OCServo OCS 351CAN Drawing — Ocservo Ocs 351 Can Drawing (PDF)
Product Videos
Visual Details
Product Video
Features and Design



Specifications and Performance



Additional Product Details


Setup and Use



Interfaces and Connections

Application Examples




