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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | REEFS129 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
179.00 oz-in
12.89 kg-cm
1.3 N-m
7.4V
159.00 oz-in
11.45 kg-cm
1.1 N-m
6.0V
135.00 oz-in
9.72 kg-cm
1.0 N-m
Top 10%
4.8V
100.00 oz-in
7.20 kg-cm
0.7 N-m
|
| Speed |
8.4V
0.06 sec/60°
1,000.0 deg/s
166.7 RPM
7.4V
0.07 sec/60°
857.1 deg/s
142.9 RPM
6.0V
0.09 sec/60°
666.7 deg/s
111.1 RPM
Above Average
4.8V
0.11 sec/60°
571.4 deg/s
95.2 RPM
|
| Running Current |
8.4V
0.300 A
300 mA
7.4V
0.240 A
240 mA
6.0V
0.180 A
180 mA
Average
4.8V
0.150 A
150 mA
|
| Stall Current | 1.9–3 A1900–3000 mABottom 10% |
| Physical | |
| Weight | 0.74 oz21.0 gBelow Average |
| Dimensions |
L 0.90 in W 0.47 in H 1.08 in L 22.9 mm W 11.9 mm H 27.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Motor Drive | FET |
| Gears | Metal / Steel |
| Gear Spline/Teeth | 25 T |
| Shaft Size | 4.9 mm |
| Rotation Mode | Continuous |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 360° |
| Mechanical Limit | No Limit |
| Pulse Cycle | 3 ms |
| Pulse Width | 500-2500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Magnetic Encoder |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Water Rating | Waterproof |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 180 mm7.09 in |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Top 10% Stronger than 99% of 363 Digital Micro servos at 6.0V |
| Speed | Above Average Faster than 72% of 361 Digital Micro servos at 6.0V |
| Weight | Below Average Lighter than 12% of 665 Digital Micro servos |
| Running Current | Average Lower draw than 36% of 67 Digital Micro servos at 6.0V |
| Stall Current | Bottom 10% Lower draw than 4% of 222 Digital Micro servos |
Performance Analysis
| Shaft Power | 1.76–5.52 W |
| Power Density | 12.075 W/in³ More power-dense than 98% of 625 Digital Micro servos |
| Torque Density | 6.4286 oz-in/g Stronger than 98% of 363 Digital Micro servos |
| Torque-to-Volume Ratio | 295.51 oz-in/in³ 4th-highest torque-to-volume ratio of 359 Digital Micro servos |
| Speed-to-Weight | 0.52910 (1/sec·g) Faster than 29% of 361 Digital Micro servos |
| Speed-Torque Trade-off | 12.15 Better balanced than 94% of 358 Digital Micro servos |
| Current-per-Torque Ratio | 0.0222 A/oz-in More efficient than 86% of 108 Digital Micro servos |
| No-Load vs Stall Current Spread | 16.67 Narrower current spread than 16% of 51 Digital Micro servos |
| Torque Gain per Volt | 13.58%/V More voltage-responsive (torque) than 25% of 302 Digital Micro servos |
| Speed Gain per Volt | 20.83%/V More voltage-responsive (speed) than 62% of 305 Digital Micro servos |
| Voltage Range Width | 2.4 V Wider voltage range than 57% of 553 Digital Micro servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 59% of 220 Digital Micro servos |
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Reviews (4)
Includes 4 reviews aggregated from around the web.
There are few reviews for this servo on the web. Video reviewers call it fantastic as a steering upgrade in an Axial SCX24 and a Losi LMT Mini.
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