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  #1  
Old 11-13-2021, 7:54 PM
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Default Could someone tumble some small stuff for me?

I have some small parts made out of stainless that I need tumbled to finish them off but the people that made them couldn't get them to come out shiny after tumbling them.

Would/could anyone do it and if so, how much would you charge me?

It's about 70 stainless steel "hooks" and are about 3x1"

Pic attached.

Thanks

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Old 11-13-2021, 8:13 PM
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Probably need to be polished tumbling will not make them shiney depending on the finish of the finished good.
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Old 11-13-2021, 8:18 PM
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Well damn

Hard to just polish with that bend...

Thanks
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Old 11-13-2021, 8:32 PM
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Location? Throwing them in a tumbler won’t hurt to try.
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Old 11-13-2021, 8:38 PM
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I'm in NC but it won't cost me much to ship the stuff. A few pounds only.

How much would you charge me?

Thanks
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Old 11-13-2021, 9:30 PM
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Didn't these used to be flash chromed back in the day?
I remember having display cards of these hanging near the cash register right next to the Bungee Nuts.
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Old 11-13-2021, 9:48 PM
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I doubt it 'cause it's my product but perhaps something similar and no, these are not chromed.
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Old 11-13-2021, 9:56 PM
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Those need a buffer wheel and compounds


Do they need to be mirror polished or how reflective / smooth

Once polished, individually wrapped to prevent scratching

Probably easier to have them locally hard chrome plated
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Old 11-13-2021, 10:04 PM
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What are they for and what is specified in any contract?

Both sides polished?

Polished in the fold?

You would really need to do a sample to see how hard the steel is, what compound is needed or do we need to run it through 2-3 different compounds?

2 is easier

Light compound left wheel and heavy compound on the other - no wheel changes
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Old 11-13-2021, 10:05 PM
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Old 11-13-2021, 10:16 PM
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You’re in NC and asking for help on a CA guns site?

https://abtmetals.com/services/tumbling-deburring/
https://www.stratfordmetal.com/

Quote:
the people that made them couldn't get them to come out shiny after tumbling them.
Interesting…the folks who made them can’t make them “shiny”? …was that part of your contract?

Quote:
It's about 70 stainless steel "hooks" and are about 3x1"
With that standard of precision, difficulties may arise.
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Old 11-13-2021, 10:32 PM
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THey're going to redo them and no, nothing was mentioned about them being finished better than they were but the owner didn't like them either so he's redoing them., However, he lets me keep the old ones and I wanted to get them tumbled/deburred and all that.

They tumbled them for me but it took away the shine so just wanted to see if anyone can do it for me without spending a fortune.

I just found a tumbling discussion here so I decided to just post here and it turns out I was already a member so...

As for where I am, wouldn't cost me much to ship'em.

I could buy a cheap tumbler for this and it would still be worth it 'cause I got'em for free, but I really have NO use for the tumbler after this and again, I have no idea what to use to keep them shiny IF that's even possible.Also, I don't want to complicate my life trying to figure stuff out if I can just have someone do them. You know, someone at home that's not gonna charge me business fees.

When I first got them from the fabricator, I bought myself a rotary tool to try to finish them off but I sucked at it and they didn't turn out well so I am looking for a better solution and I dont' want to send out a ****ty product.
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Old 11-13-2021, 10:53 PM
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Quote:
Originally Posted by guiri View Post
THey're going to redo them and no, nothing was mentioned about them being finished better than they were but the owner didn't like them either so he's redoing them., However, he lets me keep the old ones and I wanted to get them tumbled/deburred and all that.

They tumbled them for me but it took away the shine so just wanted to see if anyone can do it for me without spending a fortune.

I just found a tumbling discussion here so I decided to just post here and it turns out I was already a member so...

As for where I am, wouldn't cost me much to ship'em.

I could buy a cheap tumbler for this and it would still be worth it 'cause I got'em for free, but I really have NO use for the tumbler after this and again, I have no idea what to use to keep them shiny IF that's even possible.Also, I don't want to complicate my life trying to figure stuff out if I can just have someone do them. You know, someone at home that's not gonna charge me business fees.

When I first got them from the fabricator, I bought myself a rotary tool to try to finish them off but I sucked at it and they didn't turn out well so I am looking for a better solution and I dont' want to send out a ****ty product.
Tumbling them in a typical brass cartridge case polishing setup is not going to get them a shiny polish.
I have tumbled machined parts in my case tumbling setup and it didn't work good.
You need to send them out for electropolishing or some sort of plating that will leave them shiny.
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Old 11-13-2021, 11:17 PM
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Is there anything that WILL leave them shiny? If it works for brass, why would it not work for stainless steel?
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Old 11-14-2021, 2:12 AM
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Quote:
Originally Posted by guiri View Post
Is there anything that WILL leave them shiny? If it works for brass, why would it not work for stainless steel?
As "ar15barrels" aptly suggested. In the post above yours. Electropolishing would be best bet for your requirements.

http://qfinh.com/electropolishing/

Quote:
Electropolishing is a controlled electrochemical process utilizing acid electrolyte, DC current, anode and cathode to smooth the surface by removal of metal. It is considered the ultimate form of passivation as it not only removes iron and nickel from the stainless, it leaves behind a chromium rich surface (passive layer) as a result of the process.

It levels micro peaks and valleys to produce a clean, smooth sterile surface. Corrosion is eliminated.
Manual polishing of stainless steel, or any hard ferrous metals requires abrasive compound and high speed buffer wheels. And on hook shaped parts can be dangerous. As anyone who has had a wheel grab a part can attest.

Where as "brass" is a very soft and malleable metal. That is easily polished by the much more gentle process of a vibratory polisher and corn cob or walnut shell media.

Or a rotary tumbler with stainless pins.

Both of which work well for cartridge cases.
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Old 11-14-2021, 8:38 AM
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Quote:
Originally Posted by guiri View Post
Is there anything that WILL leave them shiny? If it works for brass, why would it not work for stainless steel?
Tumbling is typically used for deburring rather than polishing. If you want these to have a bright polished finish I would look into electropolishing, all surfaces will end up with the same finish. I have used this process (I'm a Mechanical Engineer) for stainless steel tubing and welded fittings for a variety of applications.

What alloy is the stainless steel?

Dan
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Old 11-14-2021, 8:45 AM
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Well, to be honest tumbling in corn cob media tends to make brass cases pretty shiny. However, as pointed out, stainless is much harder and I’m skeptical that it would achieve the desired result.

That being said, I have a Thumbler’s Tumbler with stainless pins, as well as a Dillon tumbler with walnut and corn cob media, and would be willing to give it a shot for you if you insist. It would only cost the shipping both ways, if that is something you really want to try.

Send me a PM if you decide you want to go this route.
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Old 11-14-2021, 11:07 AM
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Quote:
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Is there anything that WILL leave them shiny? If it works for brass, why would it not work for stainless steel?
Because the pieces of brass are scratching each other constantly.
Your pieces won't do that in the small volume and small tumbler size of a brass tumbing setup.
Have you seen how big an industrial parts tumbler is?
They have to be that big to get the parts to tumble properly.
Also, an industrial tumbler is normally loaded with abrasives to take off sharp edges, not to polish.
It would take a completely different media to tumble polish and the shop that made the parts for you probably does not have polishing media because they use the tumbler for deburring.

Abrasive tumbling that will deburr them will never leave them shiny.
Electropolishing after abrasive tumbling will leave them shiny.

https://blog.ableelectropolishing.co...ectropolishing
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Old 11-14-2021, 4:17 PM
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Well, my intention was NOT to look for something to polish them but to deburr them while NOT making them dull which is what happened to the ones they test tumbled for me.
Tumbling or putting them in a vibrating polisher or whatever, is fine with me, I just wanted to get them deburred while still keep them shiny as i figured people that buy stainless also do it because they like shiny things.

Honestly, the one they tumbled for me that turned out a bit dull and a bit darker looked good to me but then, I hate shiny stuff. However, others don't, they LIKE shiny so not sure what to do

As for the electropolishing. Does anyone know what kind of money we're talking?

Thanks and Tunaman, I'll prolly send them to you if you're willing to help me out and test for me.

Thanks
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Old 11-14-2021, 4:33 PM
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Almost all grades of stainless are pretty hard.

You might be able to tumble them if you added an abrasive powder like aluminum oxide as part of the media. This won't 'deburr' them.

If the goal is to knock down sharp edges a belt sander with fine grit on the outer edges will make quick, but manual work. The inside hole could probably be hit with a conical abrasive.
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Old 11-14-2021, 4:47 PM
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Yeah, I tried to do that with a rotary tool. THe edges were easy but the hole was a different matter and the results sucked

Sander won't work because of the hook.
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Old 11-14-2021, 5:01 PM
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Quote:
Originally Posted by guiri View Post
Well, my intention was NOT to look for something to polish them but to deburr them while NOT making them dull which is what happened to the ones they test tumbled for me.
Tumbling or putting them in a vibrating polisher or whatever, is fine with me, I just wanted to get them deburred while still keep them shiny as i figured people that buy stainless also do it because they like shiny things.

Honestly, the one they tumbled for me that turned out a bit dull and a bit darker looked good to me but then, I hate shiny stuff. However, others don't, they LIKE shiny so not sure what to do
Any automatic deburring process is usually going to take away the shiny all over the part.
Then you have to re-polish afterwards.

If you are starting with shiny and want to keep the shiny, you have to manually deburr them so you are only changing the finish where the burrs are.
If you can deburr on a 3m wheel on a pedestal grinder, you will be both deburring and polishing the edge you are deburring at the same time.

The easiest thing to do is to have them tumble deburred and then nickel or chrome plate them to make them shiny again.
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Old 11-14-2021, 5:01 PM
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I sent a PM reply. I’ll give it a shot and we will see how it goes. Probably can’t hurt, anyway, and I’m glad to give it a shot for you.
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Old 11-14-2021, 5:03 PM
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Well, even if it doesn't work, first of all, I really appreciate you offering and second, it'll be a learning experience too,right?

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Old 11-14-2021, 8:19 PM
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Quote:
Originally Posted by hermosabeach View Post
Those need a buffer wheel and compounds
This is what I would do if you want them to look chromed..
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Old 11-14-2021, 11:51 PM
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Yeah but hard to buffer something with a wheel when it's not flat

Thanks
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Old 11-17-2021, 10:43 PM
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You can do it while watching a game on TV.
You need polish compound and something similar to these.
https://www.harborfreight.com/hand-t...ise-30999.html

https://www.harborfreight.com/07-amp...psugg_q=dremel
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Old 11-18-2021, 6:30 AM
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Well, that would help and I DID buy myself a rotary tool but it still turns out like crap for different reasons. I think tumbling or vibrating them somehow would be better as it'll come out nice and even but like I said, the ones they did for me to test, turned out a bit greyish. Nothing I have a problem with myself as I don't like shiny stuff anyway, BUT, I think most people would prefer them shinier.

Thanks
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Old 11-25-2021, 2:02 AM
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The right media and process could likely be developed. Would it be worth it to figure it out? Likely not. Most likely electropolishing as others have said. I tumble 17-4 stainless often in a barrel tumbler, and I was lucky to figure out which media to use. There are companies that specialize in tumbling services, and also selling/supporting tumbling equipment and processing. You might just give a call to a tech support person at a couple of those.
If I thought I could just toss them in my setup and have it come out right I would do it. Odds are low though. Weight and shape of the part, the finish you are starting with, and the alloy/temper all make a difference.Good luck!
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Old 11-25-2021, 8:51 AM
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THanks Mike and no, definitely not worth the cost

George
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