The hub will press fit onto the shaft of many small DC generators; just attach your own blades and begin experimenting with wind power! The hub is designed to allow you to change blade angles and/or interchange blade sets quickly and easily. An improved stainless-steel insert can take a beating in your classroom year after year without failing!

Specifications

• Diameter: 2.25 in
• Max number of dowels: 12
• Size of shaft hub press fits onto: 2 mm

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