Dragline Crawler Build

[modelman]

Jim-your thinking is right on with this. The dia. of the tumbler dictates the size of all the other parts. You may have some work to do on the tumblers but I think you are on top of that. Personally, I would go with the metal chain but finding the really small sprockets may be a challenge. Does the 1/4" chain look too big? You might find something smaller in some clock works sites-not sure. Keep the pictures coming.

[Rvjimd]

Truck maker, thanks for the link. I always forget about McM for parts. I just seem to get stuff other places.

Tom, the .25 looks okay. Maybe just a bit big but not too bad. The common 10T sprocket would even look okay next to the tumbler but I might have to search for a smaller one on the motor.





The little pulley I have in the photo is about the size of the smallest sprocket I have found so far.

Jim

[Rvjimd]

Decided to bolt up both sides again so I took a few more shots.



Shaft coming out the wrong side here, but no problem yet...







Jim

[Rvjimd]

Slip ring? Has anyone tried a DIY slip ring? I have repaired one on a in motion servo satellite reciever and I am thinking about trying it. I guess I haven't looked online yet to see how much they are and how it would fit into the UC?

One of the things with my particular install is that there "should be" a 1/4" shaft in the center of the bed that the upper house centers and pivots on. This way it matches the truck frame, in case I want to switch back to the highway truck chassis.

Jim