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FeeTech FS90R
Robotics

FeeTech FS90R

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-10-08
Identity
Brand FeeTech
Category Robotics
Performance
Torque
6.0V 20.84 oz-in
4.8V 18.06 oz-in Average
Speed
6.0V 0.10 sec/60°
4.8V 0.13 sec/60° Below Average
Running Current
6.0V 0.130 A
4.8V 0.110 A Above Average
Stall Current 0.7–0.8 ABelow Average
Physical
Weight 0.32 ozAverage
Shape Boxed
Dimensions L 0.886 in
W 0.476 in
H 1.091 in
Case Material Nylon / Fiberglass
Drivetrain
Motor Type Brushed
Gears Nylon
Gear Spline/Teeth 21 T
Rotation Mode Continuous
Rotation/Support Bushing
Control & Signal
Modulation Analog
Direction Counterclockwise
Rotational Range 360°
Mechanical Limit No Limit
Pulse Width 700-2300 µs
Neutral Position 1500 µs
Dead Band 90 µs
Control System PWM
Electrical & Environment
Operating Voltage 4.8–6 V
Temperature -15–70 °C
Idle Current 0.006 A
Connectivity
Connector JR (Universal)
Wire Length 250 mm
Origin
Country of Origin China

Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Class Comparison

TorqueAverage
Stronger than 50% of 170 Analog Micro servos at 4.8V
SpeedBelow Average
Faster than 30% of 170 Analog Micro servos at 4.8V
WeightAverage
Lighter than 37% of 346 Analog Micro servos
Running CurrentAbove Average
Lower draw than 78% of 33 Analog Micro servos at 4.8V
Stall CurrentBelow Average
Lower draw than 34% of 54 Analog Micro servos

Performance Analysis

Shaft Power 0.27–0.39 W
Power Density0.837 W/in³
More power-dense than 45% of 333 Analog Micro servos
Torque Density2.0067 oz-in/g
Stronger than 42% of 170 Analog Micro servos
Torque-to-Volume Ratio39.25 oz-in/in³
Denser torque than 24% of 170 Analog Micro servos
Speed-to-Weight0.88889 (1/sec·g)
Faster than 36% of 170 Analog Micro servos
Speed-Torque Trade-off2.26
Better balanced than 56% of 169 Analog Micro servos
Current-per-Torque Ratio0.0443 A/oz-in
More efficient than 48% of 45 Analog Micro servos
Idle-to-Running Current Ratio0.055
Lower idle draw than 41% of 23 Analog Micro servos
No-Load vs Stall Current Spread7.27
Narrower current spread than 13% of 25 Analog Micro servos
Torque Gain per Volt12.83%/V
More voltage-responsive (torque) than 37% of 96 Analog Micro servos
Speed Gain per Volt20.83%/V
More voltage-responsive (speed) than 83% of 96 Analog Micro servos
Voltage Range Width1.2 V
Wider voltage range than 35% of 182 Analog Micro servos
Dead-Band-to-Pulse-Width Ratio0.0563
Finer dead band than 0% of 43 Analog Micro servos

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Reviews (1)

  • billboyheritagesurvey

    March 8, 2015

    Application(s): Pan drive for kite aerial photography (KAP) rig

    Comments: This servo is a rare example of a continuous rotation (CR) 360degree servo in the 'micro' format.

    It is lightweight and responds well to direct radio control.

    Under pulse control (e.g. Gentles clickPan Pro) it is very slow and responds in very short steps.

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