Overview
The Kpower HBL300 servo motor is an HBL Series brushless servo designed for robotics, automation, and RC/mechatronics projects that require high torque, metal gears, and multiple control interfaces. It supports PWM, TTL, and RS-485 control, operates from 4.8 ~ 8.4 V, and uses a potentiometer position sensor.
Key Features
- Brushless motor design (HBL Series).
- High-precision metal gear drivetrain.
- Protocol: PWM | TTL | RS-485 (custom servo graphics also mention CAN as an available protocol option).
- Travel angle range: 120° (customizable). Standard angles listed: 120°, 180°, 270°, 360°.
- Working frequency: 50 ~ 333 Hz (digital servo pulse-width graphic notes compatibility to 50–300 Hz high-frequency signals).
- 3-wire servo lead pinout: Brown = GND, Red = Vcc, Orange = Signal.
- Certification marks shown: ISO, CE, RoHS, EN71.
- Service life statement shown for HBL Series: “Up to Million Cycle Lifespan.”
Specifications
| Parameter | Value |
|---|---|
| Model | HBL300 |
| Stall Torquee | 30.6 kg (provided specification); also shown: 30.6 kg.cm @ 7.4V; 28.5 kg.cm @ 6.0V |
| Rated Torquee | 7.5 kg |
| No-load Speed | 0.15 s/60° (provided specification); also shown: 0.15 sec/60 @ 7.4V; 0.16 sec/60 @ 6.0V |
| Weight | 65 g |
| Dimension | 40 × 20 × 37.5 mm (provided specification); also shown: 40 × 20 × 39.4 mm |
| Travel Angle Range | 120° (Customizable) |
| Operating Voltage | 4.8 ~ 8.4 V |
| Horn Gear Spline | 25T φ5.82 mm |
| Gear Material | Metal |
| Motor | Brushless |
| Protocol | PWM | TTL | RS-485 |
| No-load Current | 4500 mA |
| Position Sensor | Potentiometer |
| Case Material | Aluminum Alloy + Plastic (also described as “Aluminum Mid Case”) |
| Ball Bearing | 2BB |
| Working Frequency | 50 ~ 333 Hz |
| Operating Temperature | -10 ~ 50°C |
| IP Rating | IP42 |
Applications
- Humanoid robots
- Robotic arms
- Exoskeletons
- Quadruped robots
- AGV vehicles
- ARU robots
- RC aircraft and RC car models (1/8 and 1/10 scale listed)
- Industrial automation
- Service robots and robot vacuums/floor cleaners
- Table tennis serving machine
- VTOL fixed-wing drone and drone dock
Manuals
Details
The Kpower HBL300 servo is built for demanding robotics and automation builds, pairing a brushless motor with a durable metal geartrain.
Brushless drive and a high-precision metal gear set help deliver strong torque and long service life for repetitive motion tasks.
Compare HBL Series options by torque/speed targets and choose the control interface that fits your controller and wiring.
Key specifications are provided for common voltages, along with size/weight details for fitment in RC and robotic assemblies.
Use the torque, speed, rotation angle, and voltage guidance to match a servo to your load and desired motion profile.
Multiple horn styles make it easier to adapt the output shaft to linkages, arms, wheels, and custom brackets.
Pulse-width timing directly controls position, with support for higher-frequency control signals for responsive digital operation.
Customization is available for appearance, wiring sequence, and control protocol integration when building OEM/ODM projects.
For continuous duty, selecting a servo based on rated torque rather than stall torque helps improve stability and longevity.
Standard 3-wire hookup keeps installation straightforward: ground, power, and signal lines are color coded.
Internal components like the gear stages, bearings, and position sensor are identified for maintenance and system design planning.
A solid fit for projects across service robotics, industrial automation, RC models, and UAV platforms.
ODM support follows a structured path from requirements and design through sampling, tooling, and production.
