Drive train specifications Belt reducer RSB1 has GT2 belt in order to transfer power to plate. 12/60 tooth pulleys provide 1:5 reduction rate. Motor Parameter Value Unit Size NEMA17 Step angle 1.8 ±5% deg Phase count 2 Mass 150 g Rated voltage 3.5 V Rated current 1.0 A Resistance per phase 3.5 ±10% Ω Inductance per phase 4.5 ±20% mH Holding torque 160 mN*m