My boogies revisit them

justme igor

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Corona give me two things: a positive test and some time off

I made some changes to my boogies, a lot of changes, for smooth operation.
The most important ones where give more side to side clearance, making the journals(axle box) deeper and thus the axle longer and the use of some lube.
20220328_080834.jpg

The wheel where the axle is coming out also increased in length:
20220328_080904.jpg

With testing some results where really suprising.
Tested a variety of lubricants.
20220328_081534.jpg
1 wd40
2 teflon
3 corn based oil
4 ? but it dissolves gunpowder and some grease.
5 fine lithium based grease
(6 7 and 8 will follow: 5w10 engine oil, compressor oil and fine silicone based oil)

Some worked better than the others, the best was wd40, just spray a little in the journal.
After smooting out the hole.

The test track were 2 sections of 1 meter 25 cm and one was raised at the end by 1.5 cm.
The goal was to let the gravity do its job, without a push, free rolling down the hill.
Wd40 had almost 1.5 meters in length and the lithium based grease barely left the first section.
Other experiments with bearings and hollow alu axles combined with all of those lubricants in any combination where a bit worse.
All of them did not leave the tilted track section.
20220328_081754.jpg
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So the best result was with extra clearance for the wheel, extended axle and wd40, now let time do its job and test them again next month, the same experiments are just outside to see what the weather is doing on them and the same are inside.
 

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justme igor

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Making axles production wise.
We had some wind and some of our fence was broken.
Before i would go to the scrapheap:
20220327_181651.jpg
I cut the fence to pieces so it would be easier to work with it.
After this i made a jig with a concrete rebare cutter.
20220326_152801.jpg
So all would be the same size.
20220326_152808.jpg
20220326_152850.jpg
Some are 66mm and others are 63mm.
20220326_165201.jpg
First the ruff stone to get the squeezed metal off and bring them more to size.
20220326_165240.jpg
Next a medium stone to round the edges off.
20220326_175603.jpg

I will be good for the next 100 or so boogies :cool: :cool:

With best regards Igor

ps if you want the stl file for a usa for ussr made boogie from 1922 for freight cars:

The other one is a bid longer: ussr made for passenger cars from 1928
 

The Shed

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justme igor justme igor , interesting design, no problems printing......

USSR Bogie.jpg
 

justme igor

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Schermafbeelding 2022-03-28 092339.png
I could go in full detail, but i did not for easy printing.
Especially for the break system
The disk on top is for making it easier/smoother to take a curve and to give some playroom to have all the couplers at the same height.
I think you might want to calibrate your printer, i think you have a under extrusion problem.

With best regards Igor
 

justme igor

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After 1 month outside in the full sun, heavy rain, frost a night and very dry weeks, the bogies with the wd40 in the journals is still the best.
it is still going down the tilted section like before.

I think on this one is not much more to improve.

With best regards Igor