PARAMETERS
                        Accuracy
Step Angle    Resistance    Indutance 
  1.8 ± 5%      ±10%/20     ±20%/1KHz
Insulation Class -  B
Duty Type -  S1
Dielectrical Strength -  500 VAC/1KHz/1mA/1S
Insulation Resistance -  100Ω/500VDC
            Matarial 
End Bell - Aluminum Alloy
Bearing - Deep groove bell bearing
Magnet - Sintered NbFeB
Wiring - UL 3265, 28AWG
 
 
FOR MORE INFO. ABOUT SIZE 23 (57mm) ROTARY STEPPER MOTOR
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http://english.dingsmotion.com/index.php?case=archive&act=show&aid=85