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25.09.2014 | We invite you to visit our stand at the exhibition "Mashex-2014"!

Get an e-ticket to the exhibition "Mashex-2014"Dear Partners and Clients!

We invite you to visit our stand №C261, hall №3 at the 17th international exhibition of equipment and technologies of metalworking and working of composite materials "Mashex-2014", which will be organized from 28 to 31 October in the exhibition center "Crocus Expo", pavilion №1, Moscow, Russia.

24.09.2014 | We invite you to visit our stand at the exhibition "Stankostroenie-2014"!

Get an e-ticket to the exhibition "Stankostroenie-2014"Dear Partners and Clients!

We invite you to visit our stand №В222 , pavilion №1, hall №2 at the international specialized exhibition "Stankostroenie-2014", which will be organized from 14 to 17 October, 2014 in the exhibition center "Crocus Expo" (Moscow, Russia).

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Stepper motors of FL20STH series

Most small of the hybrid stepper motors. Can be used in the devices of precision mechanics and optics, measuring equipment, equipment of the medical industry and communications equipment. Characterized by a high smoothness of operations and low inertia.

Lineup of FL20STH series

To view the load characteristics of FL20STH series and wiring diagram please click on the image of stepper motor's model.

Rated voltage, V Current/phase, A Resistance/phase, Ohm
Inductance/phase, mH
Holding torque, kg×cm Number of leads Rotor inertia, kg×m2 Weight, kg Length, mm
FL20STH30-0604A  3.9 0.6 6.5 1.7 0.18 4 2.0×10-7 0.06 30
FL20STH42-0804A  4.32 0.8 5.4 1.5 0.3 4 3.6×10-7 0.08 42

Main technical characteristics of FL20STH series

Parameter Specifications
Step angle 1.8°
Step angle accuracy ±5% (full step, no load)
Resistance accuracy ±10%
Inductance accuracy ±20%
Temperature rise
80°C max. (rated current, 2 phase on)
Ambient temperature -20°C ~ +50°C
Insulation resistance 100 MOhm min., 500 VDC
Dielectric strength 500 VAC for one minute
Radial play 0.02 mm. max. (450 g-load)
Axial play 0.08 mm. max. (450 g-load)
Radial force 20 N max.
Axial force 2 N max.
Holding torque 0.18 ~ 0.3 kg×cm
Current/phase 0.6 ~ 0.8 А

Ordering information for FL20STH series

FL 20 STH 30 - 060 4 A
FL - stepper motor Flange size Motor type Motor case length Current per phase Number of leads Shaft type
  20 20 mm STH with high torque 30 30 mm
42 42 mm
060 0.6 А
080 0.8 А
4 4 leads A single

Dimensions of FL20STH series (L=6.5; 15)

Load characteristics of FL20STH series


Wiring diagram