rotor head assembly - Google Search
The Proud Bow of Iowa Class Battleship Wisconsin at berth in Norfolk.
How to make a mini milling machine- manual or CNC!
Servante à rouleau d'établi
Looks like a linear actuator but not sure if it is... either way, love the wooden gear attached. Lots more pics on this site.
3D Printout for Routers lift.. DIY
Router lift - woodgears.ca