Spektrum 1/6 18kg 6v Metal Geared Waterproof Servo S904
- 1/6
Part no. S904
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Spektrum S904 replacement digital metal gear servo with dual ball bearings and Z connector, compatible with JR and Spektrum receivers.
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Overview
Servos are powered by the ESC's output to the receiver. If you're using a higher-strength servo than the ESC can support (usually greater than 20kg), you may experience 'brown-outs' where the radio signal can be interrupted and cause erratic driving. This can be helped by plugging a Glitch Buster into the receiver smoothing the current delivery. However, in some cases, you may need to install an external BEC.
Features
- Precise digital control
- Durable metal gear set
- Dual ball bearings provide less resistance for higher performance and longer life
- Z connectors are compatible with JR® and Spektrum™ receivers
Specifications
| Total Height (A) | 64.2mm |
|---|---|
| Body Width (B) | 60mm |
| Below Mount (C) | 41mm |
| Above Mount (D) | 19mm |
| Total Length (E) | 71mm |
| Total Width (F) | 28.8mm |
Servo

| Size | 1/5 |
|---|---|
| Gear Material | Metal |
| Servo Spline Count | 15Tooth |
| Waterproof Casing | Yes |
| Case Material | Plastic |
| Height (A) | 64.2mm |
| Body Length (B) | 60mm |
| Bottom to Under Mount (C) | 41mm |
| Top to Under Mount (D) | 19mm |
| Length (E) | 71mm |
| Width (F) | 28.8mm |
| Rotational Degrees | 120° (Normal) |
| 6V Torque kg/cm | 18 |
| 6V Sec/60 Degrees | 0.21 |
| Signal Type | Digital |
Compatibility
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