Description
The EMAX ES9051 and ES9251II micro digital servos are ultra‑light, fast‑response servos designed for 3D F3P aircraft, indoor flyers, micro planes, gliders, and small RC helicopters. With smooth coreless motors, precise digital control, and compact plastic gearboxes, these servos deliver excellent performance for lightweight builds where every gram matters.
Key Features
- Ultra‑light micro digital servos for indoor and micro RC aircraft
- Fast response and smooth movement with coreless motor design
- Compact plastic gearbox for minimal weight
- Ideal for 3D F3P planes, gliders, micro helis, and small RC models
- Compatible with FUT/JR‑type plugs
- Reliable performance for precision control in lightweight builds
ES9051 Specifications
- Operating Voltage: 4.0–5.5V
- Stall Torque: 0.8 kgf·cm @ 4.8V
- Speed: 0.09s/60° @ 4.8V
- Dimensions: 19 × 8 × 23 mm
- Motor: Coreless
- Weight: ~4.1g
- Direction: CCW (1500–1900 μs pulse)
- Plug: FUT/JR compatible
ES9251II Specifications
- Operating Voltage: 4.5–6.0V
- Stall Torque: 0.27 kgf·cm @ 4.8V
- Speed: 0.08s/60° @ 4.8V
- Dimensions: 18.02 × 7.91 × 16.8 mm
- Material: Plastic
- Weight: 2.5g
- Direction: CCW (1500–1900 μs pulse)
- Plug: FUT/JR compatible
- Usage: RC airplanes, gliders, micro helis
Included
- 1 × EMAX ES9051 or ES9251II Digital Servo (depending on selection)




M***W (verified owner) –
Nice small and light weight servo’s. Although it’s specified as a 4g servo, it’s even weighs a bit less at 3,74gr.
Servo test was ok and seems to work fine at 50, 125 and 250 hz.