Another Structo Dump Truck Conversion

[modelman]

Jim-what,s your plan on milling the hexes on the ends? I have been thinking about doing this on my dragline walking system but I don't know how to do it and keep the ends matching without an indexer. (I think that is what I need), but I am just in the thinking part right now. May never happen.

[Rvjimd]

Tom, I found two hex nuts that fit close onto the shaft. I drilled through the flat of the nuts and taped them for set screws on opposite side of each nut so I can attempt to evenly tighten the nuts just to try and keep them reasonably centered on the shaft.

I laid the assembly on the surface plate as I tightened the nuts to keep them parallel, although for my case I don't think it would really matter that the hex on one end is in the same plane as the other end.

Then I simply laid the shaft with nuts attached into the mill vise and milled one flat, then rotated to the next flat on the nut.




Jim

[Rvjimd]

Once I figured out how to do the hex I decided to go big. So, I'm making hubs for the wheel with the hex and a flange that looks like a brake rotor. That pulls up against the inside spokes of the wheel with a 6-32 cap screw to keep it parallel with the wheel. Then I drill the inside of the hub to fit a 1/4" steel axel.

Hex milled on the mill using a slip fit nut attached to the round. Then moved to the lathe to turn the rest.



Turned down and parting it off here.







Jim

[frizzen]

Independant suspension, coilovers, alloy super-singles, brake disks... somebodys building a Sports Dump Truck!

Looking really cool so far. I can't wait to see how it turns out.

[Rvjimd]

ya, you might get that impression huh? the coils and independent suspension is going away and the disc brakes which probably aren't typical are mostly for my machining experience/practice and to try and give support to the plastic wheel. I plan to make my own rims if I ever get this sucker powered up and working with the "borrowed" plastic.

Jim

[Rvjimd]

Here is my version 2 prototype rear axel. Thinking about how to do the halves from the gear cover out to each wheel. I want to do a "typical" style solid axel with leaf springs.



Jim