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FEETECH FS90R Micro Continuous Rotation Servo

The FS90R is a micro servo that has been built by FEETECH (formerly known as Fitec) specifically for continuous rotation, offering an inexpensive and easy way to get your small turret spinning or miniature robot moving, especially when paired with our 60×8mm wheels designed specifically for this servo. Pololu 2820

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ID: 558108

6,41€ gross (23% VAT)
5,21€ net

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Data sheet

Gear materialPlastic
Torque1,5 kg-cm
Rozmiar serwa (seria)Micro
Prędkość kątowa130 RPM
Sprzężenie zwrotneNie
Praca ciągła 360°Nie
Power supply voltage4,8 - 6 V

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Key specs at 6 V: 130 RPM (no-load), 21 oz-in (1.5 kg-cm), 9 g

The FS90R is a micro-sized servo that has been built by FEETECH (formerly known as Fitec) specifically for continuous rotation. At 6V, it has a maximum rotation speed of around 130 RPM (no-load) and can produce up to 21 oz-in (1.5 kg-cm) of torque. The servo can be controlled using a direct connection to a single microcontroller I/O line without any additional electronics, which makes it a great miniature actuator for beginner robotics projects; just throw on a pair of wheels and your robot is ready to roll!

The FS90R continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. The default rest point is 1.5 ms, but this can be adjusted by using a small screwdriver to turn the middle-point adjustment potentiometer. Pulse widths above the rest point result in counterclockwise rotation, with speed increasing as the pulse width increases; pulse widths below the rest point result in clockwise rotation, with speed increasing as the pulse width decreases.

The servo has a 8″ (200 mm) lead that is terminated with a JR-style connector and includes additional servo horns and mounting hardware.



  • Size: 23.2 × 12.5 × 22 mm
  • Weight: 9 g

General specifications

  • Digital: NO
  • Free-run current @ 6V: 200 mA
  • Stall current @ 6V: 600 mA
    (This value came from our tests. It is not specified by the manufacturer and therefore could change without notice. Stalling should generally be avoided as it can damage the motor and gears.)
  • Speed @ 6V: 0.07 sec/60°
    (About 130 RPM)
  • Stall torque @ 6V: 21 oz·in
  • Speed @ 4.8V: 0.09 sec/60°
    (About 100 RPM)
  • Stall torque @ 4.8V: 18 oz·in
  • Lead length: 8 in
  • Hardware included?: YES