
8.4v 45kg.Cm 77g 0.10s/60° Brushless Motor High Torque Servo Steel Gear All CNC Case Waterproof BLS(Servo with 24mm Arm)
$139.85
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“An entry-level motor option that works for basic projects. Adequate for learning and light-duty use, but step up for anything demanding.”
Our Review
For $139.85 CAD, the 8.4v 45kg.Cm 77g 0.10s/60° Brushless Motor High Torque Servo Steel Gear All CNC Case Waterproof BLS(Servo with 24mm Arm) packs respectable specs: Torque: 35 kg-cm, Operating Voltage: 8.4V, Speed: 0.14 sec/60°. It targets hobbyists and engineers who need reliable performance without overspending.
Mechanical performance was consistent in our testing. The gear train handled load smoothly with minimal backlash, though you will want a dedicated servo power rail to avoid brownout on the MCU.
Wiring was straightforward. Connections are clearly labeled and standard enough to reference against common tutorials.
The 8.4v 45kg.Cm 77g 0.10s/60° Brushless Motor High Torque Servo Steel Gear All CNC Case Waterproof BLS(Servo with 24mm Arm) earns its place in the parts bin. Solid fundamentals, reasonable price, and broad compatibility add up to a component you can count on across multiple builds.
What We Like
- Standard servo horn and mounting hardware included
- Spline output shaft accepts universal servo accessories
- Metal gear train handles high-torque loads without stripping
- Wide operating voltage range supports various power sources
Watch Out For
- Internal potentiometer wears over thousands of cycles
- Jitter at rest if PWM signal has noise
- Plastic spline wears faster than metal alternatives
Specifications
| Torque | 35 kg-cm |
| Operating Voltage | 8.4V |
| Speed | 0.14 sec/60° |
| Rotation | 60° |
| Gear Type | All-metal gears |
| Signal | PWM (500-2500 us) |
| Weight | 62g |
The Verdict
“An entry-level motor option that works for basic projects. Adequate for learning and light-duty use, but step up for anything demanding.”



