GB/T 39545.3-2020

This standard specifies the design principles and selection methods for keyless shaft-to-hub connections in enclosed gear drives, covering interference fits, hydraulic or mechanical assembly techniques. It is applied in the engineering design and manufacturing of industrial gearboxes, reducers, and power transmission systems where high torque transmission and precise alignment are required without traditional keyways. The standard ensures reliable load distribution and fatigue resistance in heavy machinery, such as mining equipment, wind turbines, and industrial conveyors.