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Robbe servo FS 31X HV 2.5kg.cm 0.039s/60° MG 15T-Mini
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Package contents
The package includes the servo, plastic servo levers (single-sided D=13mm, cross D=25mm), mounting screws, lever screw.
Characteristics
The Robbe FS 31X is a precision digital HV flat servo suitable for RC aircraft, RC models and other applications. Thanks to its very low weight of only 7.5 g, flat design and fast response, it is ideal for controlling ailerons, elevators or rudders of smaller aircraft models. The servo offers high control accuracy thanks to metal gears with minimal play and a torque of up to 2.46 kg.cm at a voltage of 8.4 V.
The servo is equipped with a precisely machined CNC aluminum box, which ensures high strength, low weight and effective heat dissipation. High-quality Coreless motor, a pair of ball bearings and a Soft Start function, which smoothly sets the servo to the neutral position after switching on. The servo supports High Voltage power supply in the range of 4.8–8.4 V and, thanks to its small dimensions, is also suitable for other RC models and special applications.
Features
- Precise digital HV mini servo
- Lightweight CNC aluminum box
- Coreless motor with high efficiency
- 2x ball bearings
- Metal gears with minimal backlash
- Soft Start function
- Power supply 4.8–8.4 V (HV)
- Special ultra-flat servo lever
- Suitable for RC gliders, electric planes and smaller aircraft models
- Also suitable for other RC models and others application
Specifications
- Speed: 0.062 s/60° @ 4.8 V
- Speed: 0.055 s/60° @ 6.0 V
- Speed: 0.044 s/60° @ 7.4 V
- Speed: 0.039 s/60° @ 8.4 V
- Torque: 1.82 kg.cm @ 4.8 V
- Torque: 2.10 kg.cm @ 6.0 V
- Torque: 2.32 kg.cm @ 7.4 V
- Torque: 2.46 kg.cm @ 8.4 V
- Supply voltage: 4.8–8.4 V
- Dimensions: 20 x 8 x 20.3 mm
- Weight: 7.5 g
- Thousand-edge: 15T-Mini (O 3.8 mm)
- Connector: Universal JR
We recommend buying

Extension cable
If necessary, you can extend the length of the supply cable using the JR servo cable extension. For other cables, see accessories.

External BEC power supply
We recommend powering powerful servos via an external BEC power supply. The power supply must also be installed if you are replacing the original servo in the model with a more powerful one and the existing controller does not have a sufficiently dimensioned integrated BEC.
- Overview of external BEC sources
Explanations

Overview of servo connectors
To connect the servo to the receiver, a universal servo connector is used as standard, which can be of the JR or Futaba type.
- The JR connector can be easily connected to the Futaba counterpart.
- To connect the Futaba connector to the JR counterpart, just cut off the guide surface from the side.

Overview of thousand-sided gears and servo levers
The table shows an overview of thousand-sided gears that individual manufacturers typically use. (The number of teeth and the size of the thousand-sided gear may vary exceptionally.)
- Použití
- Letadla / Univerzální
- Hmotnost
- 7,5 g
- Rychlost
- 0,062s/60° @ 4,8V; 0,055s/60° @ 6,0V; 0,044s/60° @ 7,4V; 0,039s/60° @ 8,4V
- Převody
- Kovové
- Typ motoru
- Coreless
- Konektor
- Univerzální JR
- Řízení
- Digitální
- Napájecí napětí
- 4,8 - 8,4 V
- Rozměry
- 20 x 8 x 20,3 mm
- Moment
- 1,82 kg.cm @ 4,8V; 2,10 kg.cm @ 6,0V; 2,32 kg.cm @ 7,4V; 2,46 kg.cm @ 8,4V
- Ložiska
- 2x kuličkové
- Tisícihran
- 15T (O 3,8 mm)