Anyone have any machining/steel/factory/assembly line experience?

>>998418
They sort of look like some kind of shafting, like an unfinished PTO

File: P_20160525_024429.jpg (2MB, 3264x2448px) Image search: [Google]

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Another picture, Altoids for scale

File: P_20160525_024442.jpg (1MB, 3264x2448px) Image search: [Google]

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Here's one of the top, has a sharpied on 'x' marking on the end.

File: image.jpg (48KB, 750x389px) Image search: [Google]

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Probably some sort of pan head rivet.

http://www.sapphireproducts.co.uk/pan.htm

Scrap metal

>>998418
They are rivets dude.

>>998445
>>998449

I'd doubt they are rivets. The shaft is made up of different ODs. They wouldn't be required on a rivet even of that size.

They're also allow, rivets of that size would be heat fitted not pressed.

>>998453
All rivets are pressed, hot or cold.
http://youtu.be/Ncgq6OPmY4o

Could be rejected parts.

>>998418
Not a general real item. Probably a very specific type of manufacturing process

>>998455

My typo would have made what I said unclear.

By the look of the surface they are alloy, so wouldn't be heat pressed (likes ferrous metal), rather cold pressed but something of that size would unlikely be cold pressed.

I'm aware of the operation process during riveting.

Gearbox input shafts maybe

>>998418
why on earth would they throw them out though....

>>998465
Mold faults, out of tolerances, production of the part requiring those has ended, etc.

Scrap iron is worth something like $100 per ton, which isn't worth the hassle for many companies.

They're self-sealing stem bolts.

Looks like the things need to be turned... whatever they are.

damn. Wonder how hard they are (as in rockwell) - if they're not mild steel I know a load of armourers who would round off the "head" area and make them into stakes for forming armour over.

I would ask for one, but postage would be a bitch.

pinion gears, pre machined

>>998638
I'd imagine they would have been cast rather than machined.

>>998468
WASTEFUL!

>>998638
I'm sure you're correct

File: ring&pinion.jpg (221KB, 1500x1500px) Image search: [Google]

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>>998418
Those are blank pinion gears for an automotive differential. Not sure if it's good for much, but it's really high quality steel

>>998421
I guess the X is to mark those that don't pass QC.

I have no way of knowing if they test it with ultrasound or optical. If its a pinion gear, I suppose it would be some kind of really high precision camera or similar. Looks like they make a lot of them, if that is within norms of failed QC

>but also pretty bad if they can't perfect their process.

>>998822
This would make a lot of sense, I'm in an extremely automotive area where 60% of the companies around here are auto-related. Thanks for the info!

Now the question... can I do anything with them? And are they worth scrapping for money?

>>998950
Lot of diffs use some fairly high grade alloy steels which aren't cheap- 'which' steel itself is kind of hard to say though.