Here is my plan to attach a wooden flywheel to a metal shaft.
I am making a gyroscope - the flywheel will be metal but with hardwood hubs each side. I will make the hubs from green or damp wood. Well above equilibrium moisture content. Then I will drill holes into the hubs to exact diameter of shaft (3/8") and press shaft into flywheel with hubs attached. When the wood dries it will shrink down tightly around shaft. Something like heating a railroad "tire" and letting it cool and shrink around the wheel.
Moderator edit: New thread created from this.
I am making a gyroscope - the flywheel will be metal but with hardwood hubs each side. I will make the hubs from green or damp wood. Well above equilibrium moisture content. Then I will drill holes into the hubs to exact diameter of shaft (3/8") and press shaft into flywheel with hubs attached. When the wood dries it will shrink down tightly around shaft. Something like heating a railroad "tire" and letting it cool and shrink around the wheel.
Moderator edit: New thread created from this.