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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | TS-THS921A |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
104.20 oz-in
7.50 kg-cm
0.7 N-m
7.4V
94.40 oz-in
6.80 kg-cm
0.7 N-m
6.0V
80.50 oz-in
5.80 kg-cm
0.6 N-m
Top 10%
|
| Speed |
8.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
7.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
6.0V
0.11 sec/60°
545.5 deg/s
90.9 RPM
Average
|
| Stall Current | ≤1.7 A≤1700 mABelow Average |
| Physical | |
| Weight | 0.74 oz21.0 gBottom 10% |
| Dimensions |
L 0.91 in W 0.47 in H 1.08 in L 23.1 mm W 11.9 mm H 27.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Shaft Size | 4.9 mm |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Refresh Rate | 400 Hz |
| Angle Sensor | Magnetic Encoder |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Power Source | 2S LiPo |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 190 mm7.48 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 91% of 330 Digital Micro servos at 6.0V |
| Speed | Average Faster than 49% of 330 Digital Micro servos at 6.0V |
| Weight | Bottom 10% Lighter than 7% of 622 Digital Micro servos |
| Stall Current | Below Average Lower draw than 21% of 194 Digital Micro servos |
Performance Analysis
| Torque Density | 3.8333 oz-in/g Stronger than 87% of 329 Digital Micro servos |
| Torque-to-Volume Ratio | 174.27 oz-in/in³ Denser torque than 90% of 329 Digital Micro servos |
| Speed-to-Weight | 0.43290 (1/sec·g) Faster than 10% of 329 Digital Micro servos |
| Speed-Torque Trade-off | 8.85 Better balanced than 88% of 329 Digital Micro servos |
| Current-per-Torque Ratio | 0.0211 A/oz-in More efficient than 92% of 85 Digital Micro servos |
| Torque Gain per Volt | 12.27%/V More voltage-responsive (torque) than 24% of 269 Digital Micro servos |
| Speed Gain per Volt | 15.62%/V More voltage-responsive (speed) than 37% of 274 Digital Micro servos |
| Voltage Range Width | 2.4 V Wider voltage range than 54% of 513 Digital Micro servos |
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