1. Helical gearbox. gear reducer, reducer 2.SGS, ISO9001:2008,CE etc 3.Warranty: 1 year ... per month Helical gearbox F series parallel shaft-helical gear reducer Helical gearbox. gear reducer, reducerDetailed Gearbox Description: For F gearboxes, the cases are ... coupledDemension sizeImportant machinePackingCertification Helical gearbox F series parallel shaft-helical gear reducer