Make sure the motor connect to a constant current or chopper drive controller before you test motor. Connecting the motor directly to a power supply will destroy the motor. ProductSiteLaunchDate : 2018-12-14T08:00:00.000Z Size : 42-38 Speed : 1 amperes_per_watts Style : Nema 11 Stepper Motor SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 26111500 Voltage : 12 volts