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Features: SMR shaft mounted gearbox specification: 1.Output Hubs Standard or alternative hubs with metric bores are available to suit international diameters. 2.Precision high quality gearing Computer designed helical gear.Strongly alloy materials for high load capacity.Case carburized for long life.Ground profile(some intermediate pinions are shaved).Crown tooth profile.In conformance with ISO 1328-1997,98% efficiency for per stage,smooth quiet operation with teeth in mesh.