This is a revision of my 12 Ton Railway wagon. I originally drew this using 123D, but this version has been updated using Fusion 360. The main axles sides are now fully symmetric.
The bogies feature slots for 3mm7mm3mm ball races, which make the wagon really smooth. You can always use the bogie from my original design ("Strong Swing Axle print 2") if you prefer not to use the ball races.
I have also added a "close coupling" version with the ball race that couples closer, and is slightly easier to fit the ball races in as it has a stress relief slot.
There are a number of different bodies that can be used with the bogies and buffers and axle side parts:
My original 12 ton wagon, plus versions with low sides and no sides at all, plus a Guards van based on a sliding door van Vendorf70 is designing that will also use the same bogies, axle sides etc.
The guards van in particular is challenging print, but it can be done!. Mine took a well calibrated printer and 16 hrs just for the main body. I expect other printers can do it faster...The roof should be printed "with supports", and there will be a lot of stuff to remove. The roof then slots on the main body, and can be glued on.
I have updated the axle ends to make them easier to print.
I plan to add other bodies here later using the same basic parts, perhaps to make the train shown in you-tube "Isle of Wight Steam Railway 'ISLAND STEAM DAY' - 13/04/2014"