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Technical Specifications
Last Updated: 2026-10-27| Identity | |
| Brand |  |
| Product Number | DS3218 |
| Category | Hobby |
| Performance | |
| Torque |
6.8V
298.58 oz-in
21.50 kg-cm
2.1 N-m
5.0V
249.97 oz-in
18.00 kg-cm
1.8 N-m
|
| Speed |
6.8V
0.14 sec/60°
428.6 deg/s
71.4 RPM
5.0V
0.16 sec/60°
375.0 deg/s
62.5 RPM
4.8V
0.18 sec/60°
333.3 deg/s
55.6 RPM
Below Average
|
| Stall Current | 1.8–2.2 A1800–2200 mAAbove Average |
| Physical | |
| Weight | 2.12 oz60.0 gAverage |
| Dimensions |
L 1.57 in W 0.81 in H 1.59 in L 39.9 mm W 20.6 mm H 40.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | 3-pole |
| Gears | Aluminum |
| Gear Spline/Teeth | 25 T |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 180° |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1500 µs |
| Dead Band | 3 µs |
| Control System | PWM |
| Programmable | No |
| Signal Voltage | 3.3–5V |
| Electrical & Environment | |
| Operating Voltage | 4.8–6.8 V |
| Temperature | -15–70 °C5–158 °F |
| Water Rating | IP66 |
| Idle Current | 0.005 A5 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
| Speed | Below Average Faster than 17% of 1044 Digital Standard servos at 4.8V |
| Weight | Average Lighter than 59% of 1879 Digital Standard servos |
| Running Current | Top 10% Lower draw than 100% of 226 Digital Standard servos |
| Stall Current | Above Average Lower draw than 83% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 2.89–3.94 W |
| Power Density | 1.950 W/in³ More power-dense than 43% of 1767 Digital Standard servos |
| Torque Density | 4.1662 oz-in/g |
| Torque-to-Volume Ratio | 123.63 oz-in/in³ |
| Speed-to-Weight | 0.09259 (1/sec·g) Faster than 28% of 1037 Digital Standard servos |
| Speed-Torque Trade-off | 45.00 |
| Current-per-Torque Ratio | 0.0088 A/oz-in |
| Idle-to-Running Current Ratio | 1.250 Lower idle draw than 1% of 167 Digital Standard servos |
| No-Load vs Stall Current Spread | 550.00 Narrower current spread than 1% of 179 Digital Standard servos |
| Speed Gain per Volt | 14.30%/V More voltage-responsive (speed) than 44% of 873 Digital Standard servos |
| Voltage Range Width | 2.0 V Wider voltage range than 41% of 1559 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0015 Finer dead band than 50% of 504 Digital Standard servos |
Notes
This servo comes in 180 or 270 degree rotation versions.
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Reviews (747)
Includes 747 reviews aggregated from around the web.
Owners generally like this inexpensive waterproof metal-gear steering servo, which holds a 4.4 out of 5 average from several hundred buyer ratings. Reviewers call it strong, easy to install, a good fit as a drop-in replacement in 1/10 and 1/8 cars and crawlers, and a great value for the money. The most common complaint is speed: many find it noticeably slow compared with other servos advertised at similar torque. Quality control is hit or miss. Some owners received units that failed within minutes or after a few runs, started jittering after a few hours, did not center properly, or made a crunchy sound. Others report that the real rotation is less than advertised and that the wire is short. Overall, a good-value strong servo that suits crawlers and heavier builds better than fast on-road use, with some risk of getting a dud.
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