Gear Down

I wanted my worktables to be solid but portable. Locking castors are workable but they tend to be unstable.

I have seen some retracting wheel designs on the Vans Air Force forums but I wanted to try something with a foot pedal. The general idea was inspired by the brilliant designs of Carl Holmgren.

I sketched up the design in Solidworks to figure out the dimensions and range of motion that I would need. I made a few tweaks in the final assembly but the math checked out and they work great.

Gear up.
Gear down. Stepping on the pedal lifts the tables and locks the gear in place.