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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 85% of 1061 Digital Standard servos at 6.0V |
| Speed | Below Average Faster than 28% of 1044 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 45% of 1879 Digital Standard servos |
| Stall Current | Below Average Lower draw than 14% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 4.38–6.42 W |
| Power Density | 3.450 W/in³ More power-dense than 65% of 1768 Digital Standard servos |
| Torque Density | 6.2096 oz-in/g Stronger than 89% of 1054 Digital Standard servos |
| Torque-to-Volume Ratio | 216.61 oz-in/in³ Denser torque than 87% of 1059 Digital Standard servos |
| Speed-to-Weight | 0.09064 (1/sec·g) Faster than 26% of 1037 Digital Standard servos |
| Speed-Torque Trade-off | 68.52 Better balanced than 89% of 1035 Digital Standard servos |
| Current-per-Torque Ratio | 0.0154 A/oz-in More efficient than 48% of 329 Digital Standard servos |
| Torque Gain per Volt | 14.71%/V More voltage-responsive (torque) than 43% of 873 Digital Standard servos |
| Speed Gain per Volt | 15.32%/V More voltage-responsive (speed) than 50% of 873 Digital Standard servos |
| Voltage Range Width | 1.4 V Wider voltage range than 38% of 1560 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0008 Finer dead band than 91% of 496 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.