what do you think she is?

[87527]

hello to all and good holidays. I found this biella in a rectification in the reggiano (milia reggio) and since they were not able to tell me where it comes from I would like to hear from you... Where do you think tractors, cars, motorcycles come from?
then I would also like to know what you can deduce of breakage from the piece. because I would also like to learn how to analyze fractures.
I would think that the breakage started from the lubrication hole and then extended. Can it be that there has been a sudden increase in the inertial load, for example due to an out-turn that deformed the foot and triggered the breakup? Does it look like to you looking at the inside of the foot that the pin has "saltellated" in the seat?
I would like to try to learn from you that you are definitely more experienced

 

[paulpaul]

Hi.
Looking at it like that, it would seem like a little bit of a slow machine, where inertial forces are not preponderant.
Despite this, the high thickness of hat and foot seems to suggest the presence of pull forces not negligible, making think of a double effect machine, then equipped with a cross head.
However, in the case of a crosshead, the lubrication of the spindle is usually done by channelling inside the barrel of the biella, here absent and replaced by a traditional "more motoristic" solution (the two holes on the foot).

I would think of a slow diesel engine or a double-acting alternative machine, such as a compressor or pump.

There are also several machine builders who buy automotive commercial biellas and use them on process machines. a famous Italian compressor manufacturer used, for its lower power machines (say below 100 kw/cylinder), biella of an equally famous Italian manufacturer of commercial vehicles. the same choice was also made by at least one manufacturer of alternative pumps in my area.
But I don't think this is an automotive biella, although I might be wrong. . .

Is the foot bushing made of aluminium? I can't figure out if it's still mounted, looking at the spout of the other hole I'd say yes but I don't understand well... and the other piece of the biella? Do you have a way to post pictures?

 

[Er Presidente]

probably a compressor. grip of the piston resulting in breakage of the biella.

 

[cacciatorino]

probably a compressor. grip of the piston resulting in breakage of the biella.

It's a compressor, too. .

 

[MBT]

I agree on the compressor. . .

 

[PierArg]

hi, honestly I can't say if it belongs to a compressor or a slow diesel engine; however I agree on the grip.
the rough/brown surface is much larger than the smooth one. this indicates that the breakage occurred at a glance and excessive plastic deformation (the material seems literally torn) and not by fatigued load.
the fracture started from the outer diameter of the head hole and propagated for a few cycles. excessive loads (due to a probable grip) did the rest.