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Technical Specifications
Last Updated: 2026-10-08
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | ACE8121 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V41.70 oz-in3.00 kg-cm0.3 N-m |
| Speed |
4.8V0.19 sec/60°315.8 deg/s52.6 RPM |
| Physical | |
| Weight | 1.78 oz50.5 gAverage |
| Dimensions |
L 1.59 in W 0.79 in H 1.49 in L 40.4 mm W 20.1 mm H 37.8 mm |
| Drivetrain | |
| Gears | Hybrid |
| Gear Spline/Teeth | 25 T |
| Control & Signal | |
| Modulation | Analog |
| Connectivity | |
| Connector | JR (Universal) estimate |
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
| Weight | Average Lighter than 43% of 448 Analog Standard servos |
Performance Analysis
| Shaft Power | 0.41 W |
| Power Density | 0.217 W/in³ More power-dense than 5% of 437 Analog Standard servos |
| Torque Density | 0.8257 oz-in/g |
| Torque-to-Volume Ratio | 22.28 oz-in/in³ |
| Speed-to-Weight | 0.10422 (1/sec·g) |
| Speed-Torque Trade-off | 7.92 |
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Reviews (1)
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rajathv8
April 11, 2012Application(s): Steering servo in 1/10 RC car
Comments: For what it offers the servo is good.
However it is slow for a 1/10 scale RC car. There is a play in the steering servo.
I have no problems with it after using it for a year.