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Technical Specifications
Last Updated: 2026-09-14| Identity | |
| Brand |  |
| Product Number | 37950S |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
7.4V
486.00 oz-in
35.00 kg-cm
3.4 N-m
6.0V
403.00 oz-in
29.02 kg-cm
2.8 N-m
Above Average
|
| Speed |
7.4V
0.14 sec/60°
428.6 deg/s
71.4 RPM
6.0V
0.17 sec/60°
352.9 deg/s
58.8 RPM
Below Average
|
| Stall Current | 4.8–6.2 A4800–6200 mABelow Average |
| Physical | |
| Weight | 2.29 oz64.9 gAverage |
| Dimensions |
L 1.57 in W 0.79 in H 1.50 in L 39.9 mm W 20.1 mm H 38.1 mm |
| Case Material | Plastic / Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | MOS |
| Gears | Titanium |
| Gear Spline/Teeth | 24 T estimate |
| Shaft Size | 5.8 mm |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 180° |
| Pulse Cycle | 20 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 1 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Signal Voltage | 3-5V |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Power Source | 2S LiPo |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | IP54 |
| Idle Current | 0.010 A10 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 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 | Above Average Stronger than 84% of 1043 Digital Standard servos at 6.0V |
| Speed | Below Average Faster than 27% of 1041 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 44% of 1902 Digital Standard servos |
| Stall Current | Below Average Lower draw than 15% of 539 Digital Standard servos |
Performance Analysis
| Shaft Power | 4.38–6.42 W |
| Power Density | 3.450 W/in³ More power-dense than 65% of 1759 Digital Standard servos |
| Torque Density | 6.2096 oz-in/g Stronger than 88% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 216.61 oz-in/in³ Denser torque than 86% of 1042 Digital Standard servos |
| Speed-to-Weight | 0.09064 (1/sec·g) Faster than 25% of 1033 Digital Standard servos |
| Speed-Torque Trade-off | 68.52 Better balanced than 88% of 1031 Digital Standard servos |
| Current-per-Torque Ratio | 0.0154 A/oz-in More efficient than 51% of 315 Digital Standard servos |
| Torque Gain per Volt | 14.71%/V More voltage-responsive (torque) than 42% of 850 Digital Standard servos |
| Speed Gain per Volt | 15.32%/V More voltage-responsive (speed) than 49% of 871 Digital Standard servos |
| Voltage Range Width | 1.4 V Wider voltage range than 38% of 1539 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0008 Finer dead band than 91% of 468 Digital Standard servos |
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Reviews (2)
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ZaneT
June 5, 2015Application(s): HB VE8 Buggy
Comments: Can not beat this servo killer power and speed have had this servo a 1 1/2 and it finally failed but 10min on the phone with them sent it in cost me 6.00 usd for a brand new one that was shipping and it was my fault it went out so I cant blame them and they took care of me on it love the company and their products
Savageasflux
March 5, 2015Application(s): RC8Te for steering. Castle Mamba Monster Maxx ESC with extra caps and 1515 2200kv motor, running 5s 45C nanotech lipo with Castle BEC at 7.4v.
Comments: Fast enough and very strong, run it on a BEC and its awesome when you can control everything. Doesnt buzz holding steering very much like some other brand servos i've had. With the titanium gears it holds up to a lot of abuse that I put on the RC8Te front end steering setup with tight servo saver and lots of huge 20ft+ jumps, heavy bashing, multiple backflips, and lots of crashes. It costs a considerable amount, I got it for $125 new, but is well worth it and my most expensive Hitec servo so far. Had this servo for over 2 years, never failed me yet. I have lots of Hitecs in 1/5 and 1/8, cant complain about any! Heard they have great support and warranty, but ive never needed it. I use the Hitec Hpp-21, its a great programmer and tester for this servo when connected to my PC.