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Technical Specifications
Last Updated: 2026-07-28Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
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| Identity | |
| Brand |  |
| Product Number | 37985S |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
172.00 oz-in
12.39 kg-cm
1.2 N-m
4.8V
144.00 oz-in
10.37 kg-cm
1.0 N-m
|
| Speed |
6.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
4.8V
0.16 sec/60°
375.0 deg/s
62.5 RPM
|
| Running Current | (add) |
| Stall Current | (add) |
| Shaft Power | 1.66–2.45 W |
| Physical | |
| Weight | 2.19 oz62.0 g |
| 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 |
| Case Material | (add) |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | (add) |
| Gears | Metal |
| Gear Spline/Teeth | 24 T estimate |
| Rotation Mode | (add) |
| Rotation/Support | Dual Bearings |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | (add) |
| Rotational Range | (add) |
| Mechanical Limit | (add) |
| Pulse Cycle | 20 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | (add) |
| Dead Band | (add) |
| Refresh Rate | (add) |
| Angle Sensor | (add) |
| Control System | (add) |
| Programmable | (add) |
| Signal Voltage | (add) |
| Electrical & Environment | |
| Operating Voltage | (add) |
| Power Source | (add) |
| Regulator Type | (add) |
| Temperature | (add) |
| Water Rating | (add) |
| Certification | (add) |
| Idle Current | (add) |
| Connectivity | |
| Connector | (add) |
| Wire Length | (add) |
| Origin | |
| Country of Origin | (add) |
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.
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Reviews (1)
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Brandon
June 13, 2014Application(s): Steering servo on Rustler
Comments: For around 75 bucks it's a pretty decent servo. I like the fact that its got metal gears, coreless motor, and water resistant. I've gotten it wet plenty of times without any issues, although I did add some plasti-dip around the seams just to be on the safe side.
If you don't want to shell out the extra money for a high end titanium geared coreless servo I think the 7985 is a pretty good option. Its got plenty of torque for a Rustler and I'm sure it would do just fine in a 1/8 buggy also, but it would be nice if it was a little faster IMO for any kind of racing applications.