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Technical Specifications
Last Updated: 2026-10-27| Identity | |
| Brand |  |
| Product Number | 35990R |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
7.4V
416.61 oz-in
30.00 kg-cm
2.9 N-m
6.0V
333.29 oz-in
24.00 kg-cm
2.4 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
|
| Running Current |
7.4V
0.380 A
380 mA
6.0V
0.300 A
300 mA
Average
|
| Stall Current | 4.2–5.2 A4200–5200 mABelow Average |
| Physical | |
| Weight | 2.40 oz68.0 gAverage |
| Dimensions |
L 1.57 in W 0.78 in H 1.45 in L 39.9 mm W 19.8 mm H 36.8 mm |
| Drivetrain | |
| Motor Type | Coreless Brushed |
| Motor Drive | MOS |
| Gears | Titanium |
| Gear Spline/Teeth | 24 T estimate |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 180° |
| Pulse Cycle | 20 ms |
| Pulse Width | 550-2450 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM / Serial |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Power Source | DC |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | Waterproof |
| Idle Current | 0.003 A3 mA |
| Connectivity | |
| 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 73% of 1060 Digital Standard servos at 6.0V |
| Speed | Below Average Faster than 27% of 1045 Digital Standard servos at 6.0V |
| Weight | Average Lighter than 39% of 1880 Digital Standard servos |
| Running Current | Average Lower draw than 39% of 226 Digital Standard servos at 6.0V |
| Stall Current | Below Average Lower draw than 22% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 3.63–5.50 W |
| Power Density | 3.099 W/in³ More power-dense than 61% of 1768 Digital Standard servos |
| Torque Density | 4.9013 oz-in/g Stronger than 77% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 187.70 oz-in/in³ Denser torque than 79% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.08651 (1/sec·g) Faster than 20% of 1038 Digital Standard servos |
| Speed-Torque Trade-off | 56.67 Better balanced than 83% of 1034 Digital Standard servos |
| Current-per-Torque Ratio | 0.0156 A/oz-in More efficient than 47% of 331 Digital Standard servos |
| Idle-to-Running Current Ratio | 0.010 Lower idle draw than 92% of 167 Digital Standard servos |
| No-Load vs Stall Current Spread | 17.33 Narrower current spread than 54% of 179 Digital Standard servos |
| Torque Gain per Volt | 17.86%/V More voltage-responsive (torque) than 67% of 873 Digital Standard servos |
| Speed Gain per Volt | 15.32%/V More voltage-responsive (speed) than 49% of 874 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 | 0.0011 Finer dead band than 60% of 504 Digital Standard servos |
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Reviews (2)
-
Hari
January 8, 2014Application(s): To lift a robotic arm
Comments: The theoritical static torque required was around 27 kg-cm. For the first time when we tested,the servo was able to draw the rated current of about 5.1 A at 7.4 v and was hence able to lift the arm. But,after that it never happened again and now it is able to draw only a max of 3-3.5 A. We replaced the servo with a new one of the same type,but even that new one is unable to draw the required current. We tried changing the power source,we tried increasing the trace width of the shield we made to connect the servo with arduino and power source, we replaced all the wires with thicker ones and tried almost all possible solutions...
Any suggestion regarding this will be deeply acknowledged.cmayer777
July 11, 2013Application(s): Robotics limb joints
Comments: As with ALL servos, the published specs are exaggerated by close to a factor of 2. My measurements show the HSR-5990TG to only provide an average of 245 oz-in of static torque at 7.4 volts. Also, I don't like that they shut themselves off when they hit peak load. I already know when they are near the max, and control them as needed. Shutting off is dangerous!