D - 48 - 42 - U SPECIFICATIONS D-48-42-U29 D-48-42-U28 D-48-42-U24C . Units Unipolar, Medium Torque Unipolar, High Torque Unipolar, High Torque Operating Voltage V 6 12 24 Rated Current mA 800 per stack 450 per stack 550 per stack Resistance per phase W 3 10 22 Inductance per phase mH 1.9 7.5 14 Holding Torque g-cm 835 1488 1770 Detent Torque g-cm 105 105 105 Rotor Inertia g-m2 21.3 x 10-4 21.3 x 10-4 21.3 x 10-4 Weight gms 175 175 175 Step Angle degrees 7.5 7.5 7.5 Step angle accuracy o +/- 0.5o +/- 0.5o +/- 0.5o Max. operating temperature oC 100 100 100 Dielectric strength - 1000 VAC for 1 min. 1000 VAC for 1 min. 1000 VAC for 1 min. End play mm 0.2 0.2 0.2
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