I'm trying to find an enclosed cable, similar to a cars speedometer cable or roto-rooter, that I can attach a hand crank/wheel or knob on one end and turn a small gear with the other end.
It's going to allow an operator to make fine or incremental adjustments to a device under 4-5ft of water.
I can't find anything (aside from an actual speedometer cable)...
Any ideas?
Thanks