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Reduce discolorations on cold-headed 18-8 stainless screws

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Q. Hi everybody I have been working on this website for several years and have gotten a lot of help from existing posts but this time I have my own problem that I'm not even sure you can help with. I have a small cold heading company and we make small screws. We have been making these screws for a particular company for a decade and although nothing has changed on our end they are not happy with these rings on the head surface.

61535-1c   61535-1a   61535-1b

These are stainless steel parts and you cannot see this with the naked eye nevertheless this is a very important customer for us so we want to fix it somehow. I don't believe there is anything in the manufacturing process we can change that would remedy the situation so I wanted to know what suggestions you would have for a third party process to shine these up some more. I am not looking for Electro polishing as I know that is on a piece by piece basis I need something that can be done in bulk as we are talking about hundreds and hundreds of thousands of parts. Thank you so much!

Amy James
- Santa Ana, California
March 30, 2023


Q. Hi everyone,
We cold head parts and while I know, discolorations on the heads are common to one extent or another and inherent to the process, I am searching for recommendations on treatments available to improve appearance. We have never had a customer complain about it before but we have one now, and we don't want to lose them so we need a way to make their heads as perfect as possible without any plating. Any idea would be great.

61535-2

They also need them to be SHINY so glass bead blasting is out.
Thank you in advance for any and all suggestions.

Amy James [returning]
- Santa Ana, California
April 12, 2023


A. How about mass electropolishing in basket?

anna_berkovich
Anna Berkovich
Russamer Lab
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Pittsburgh, Pennsylvania
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thumbs up sign I had no idea that existed going to start looking into that thank you so much for the suggestion

Amy James [returning]
- Santa Ana California
April 14, 2023




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