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Technical Specifications
Last Updated: 2026-07-28
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | TS-THS921B |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
136.10 oz-in
9.80 kg-cm
1.0 N-m
7.4V
123.60 oz-in
8.90 kg-cm
0.9 N-m
6.0V
106.90 oz-in
7.70 kg-cm
0.8 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
0.10 sec/60°
600.0 deg/s
100.0 RPM
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 | Brushless |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Shaft Size | 4.9 mm |
| Rotation Mode | Standard |
| 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 |
| 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 96% of 334 Digital Micro servos at 6.0V |
| Speed | Average Faster than 56% of 335 Digital Micro servos at 6.0V |
| Weight | Bottom 10% Lighter than 7% of 630 Digital Micro servos |
Performance Analysis
| Torque Density | 5.0905 oz-in/g Stronger than 94% of 333 Digital Micro servos |
| Torque-to-Volume Ratio | 231.43 oz-in/in³ Denser torque than 94% of 333 Digital Micro servos |
| Speed-to-Weight | 0.47619 (1/sec·g) Faster than 15% of 334 Digital Micro servos |
| Speed-Torque Trade-off | 10.69 Better balanced than 91% of 333 Digital Micro servos |
| Torque Gain per Volt | 11.38%/V More voltage-responsive (torque) than 20% of 272 Digital Micro servos |
| Speed Gain per Volt | 10.42%/V More voltage-responsive (speed) than 11% of 278 Digital Micro servos |
| Voltage Range Width | 2.4 V Wider voltage range than 55% of 521 Digital Micro servos |
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