Reefs RC 900 Smart Brushless Servo & Winch – Submarine Waterproof
The Reefs RC 900 Smart is one of the most capable and versatile servo/winch combinations available for serious RC crawling and scale builds — delivering massive torque, high speed, and genuine submarine waterproofing in a compact CNC aluminum package. Out of the box it functions as a high-torque, high-speed brushless servo, and with the Reefs Link and software (sold separately) it can be reconfigured as a winch with a built-in preprogrammed winch controller — no external winch controller required. At up to 940 oz-in of torque at 8.4V and a blistering 0.10 sec/60° at 8.4V, the 900 Smart has the muscle and speed to handle the most demanding steering, winching, and accessory applications.
The 4-pole brushless motor drives through internal steel gears in a full CNC machined aluminum case for maximum durability and precision. A magnetic angle sensor replaces traditional potentiometers for longer life and more consistent positioning, and four ball bearings support smooth, reliable operation under sustained heavy loads. Seven-point submarine sealing with a gray heatsink finish provides genuine waterproof protection for full immersion applications. The 25T spline output is compatible with a wide range of servo horns and hardware.
Features:
- Functions as high-torque brushless servo out of the box
- Converts to winch mode via Reefs Link and software (sold separately)
- Built-in preprogrammed winch controller — no external controller needed for winch operation
- 4-pole brushless motor for high performance and efficiency
- Internal steel gears for maximum durability
- Full CNC machined aluminum casing
- Magnetic angle sensor for long-lasting, consistent positioning
- 4 ball bearings for smooth, reliable operation under load
- Submarine waterproof — 7-point sealing with gray heatsink finish
- 25T spline output
- 2μs dead band width
- Pulse Width Modulation control
- REEFS LINK required for programming and winch mode configuration
Specifications:
| Specification |
Detail |
| Voltage Range |
4.8V–8.4V |
| Torque @ 6.0V |
720 oz-in |
| Torque @ 7.4V |
830 oz-in |
| Torque @ 8.4V |
940 oz-in |
| Speed @ 6.0V |
0.13 sec/60° |
| Speed @ 7.4V |
0.12 sec/60° |
| Speed @ 8.4V |
0.10 sec/60° |
| Bearings |
4 Ball Bearings |
| Spline |
25T |
| Dead Band Width |
2μs |
| Dimensions (LxWxH) |
1.57 x 0.79 x 1.5" |
| Weight |
2.99oz |
| Unload Current |
460mA (4.8V) / 500mA (6.0V) / 540mA (7.4V) / 580mA (8.4V) |
| Load Current |
5000mA (4.8V) / 5800mA (6.0V) / 6800mA (7.4V) / 7400mA (8.4V) |
| Motor Type |
4-Pole Brushless |
| Gear Material |
Internal Steel |
| Casing |
Full CNC Aluminum |
| Waterproof Rating |
Submarine (7-Point Seals) |
In the Box:
| Qty |
Item |
| 1 |
Reefs RC 900 Smart Brushless Servo & Winch |
Note: REEFS LINK (sold separately) is required for programming and to convert the servo to winch mode. BEC not required but recommended for maximum performance.