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Robbe servo FS 4509X HV 45kg.cm 0.090s/60° MG WP Brushless 25T
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Package contents
The package includes a servo, plastic levers (double-sided D=33/48mm, cross D=33mm) servos and an aluminum lever (single-sided D=30mm), mounting screws, silent blocks, metal inserts, lever screw.
Characteristics
The Robbe FS 4509X WP is an extra strong digital HV servo suitable for RC aircraft, RC models and other applications. Thanks to the high torque of up to 45.0 kg.cm at a voltage of 8.4 V, very fast response and a brushless motor, it is ideal for all categories of RC aircraft, especially large models and RC turbines. Thanks to its IP67 waterproof design, it is also an excellent choice for long-term operation in RC cars, crawlers and RC boats.
The servo is equipped with a precisely machined CNC aluminum box, which ensures high strength, low weight and effective heat dissipation. The brushless motor, a pair of ball bearings, steel gears with minimal play and the Soft Start function, which smoothly sets the servo to the neutral position after switching on, ensure high control accuracy, high efficiency and long service life. The servo supports High Voltage power supply in the range of 4.8–8.4 V and thanks to the waterproof IP67 design, it is also suitable for demanding operating conditions.
Features
- Precise digital HV standard servo
- Lightweight CNC aluminum box
- Brushless brushless motor
- 2x ball bearings
- Steel gears with minimal backlash
- Soft Start function
- Waterproof IP67 design
- Power supply 4.8–8.4 V (HV)
- Suitable for RC airplanes, large models and RC turbines
- Also suitable for RC cars, crawlers, RC boats and others application
Specifications
- Speed: 0.150 s/60° @ 4.8 V
- Speed: 0.130 s/60° @ 6.0 V
- Speed: 0.110 s/60° @ 7.4 V
- Speed: 0.090 s/60° @ 8.4 V
- Torque: 21.0 kg.cm @ 4.8 V
- Torque: 28.0 kg.cm @ 6.0 V
- Torque: 38.0 kg.cm @ 7.4 V
- Torque: 45.0 kg.cm @ 8.4 V
- Supply voltage: 4.8–8.4 V
- Dimensions: 40 x 20 x 40.5 mm
- Weight: 77 g
- Thread: 25T (O 5.95 mm)
- Connector: Universal JR
We recommend buying

Servo levers
A wide range of levers is available for servos, whether plastic, aluminum, single-sided, double-sided, etc.
- Complete overview of servo levers with a 25T thousand-sided (teeth).

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 blades and servo levers
The table shows an overview of thousand-sided blades that individual manufacturers typically use. (The number of teeth and the size of the thousand-toothed wheel may vary exceptionally.)
- Použití
- Letadla / Univerzální
- Hmotnost
- 77 g
- Rychlost
- 0,150s/60° @ 4,8V; 0,130s/60° @ 6,0V; 0,110s/60° @ 7,4V; 0,090s/60° @ 8,4V
- Převody
- Ocelové
- Typ motoru
- Střídavý
- Konektor
- Univerzální JR
- Řízení
- Digitální
- Napájecí napětí
- 4,8 - 8,4 V
- Rozměry
- 40 x 20 x 40,5 mm
- Moment
- 21,0 kg.cm @ 4,8V; 28,0 kg.cm @ 6,0V; 38,0 kg.cm @ 7,4V; 45,0 kg.cm @ 8,4V
- Ložiska
- 2x kuličkové
- Tisícihran
- 25T (O 5,96 mm)