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Letter 5022
Black Oxide using a tumbling
barrel
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I am new to the process of black oxiding and I have a question.
Right now we place small parts in a basket and put them into our
black oxide tank. I was wondering if we could put these parts into a
tumbling barrel and black oxide that way. We seem to get a lot of
nesting the way we do it now and I thought that if we tumbled them we
could eliminate this problem. I would appreciate any help I could
get. Thank you very much in advance. Terry
Terry Murphy
- Bridgeport,CT USA
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Terry - Absolutely! Using a barrel for black oxide is a great way
to process parts. Although you mention it in relation to using a
basket, nesting can sometimes be a problem with barrels too. It will
take some experimentation on your part to find the proper load size
and/or mixture of parts to minimize nesting. Good luck!
Dan Brewer
chemical process supplier - Gurnee, Illinois
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Tumbling barrel is a term normally used for mass finishing, IE:
deburr. Barrel plating is a more normal term. Barrels are frequently
used for black oxide on parts that can stand the repeated banging
together of the parts. Look in the metal finishing guidebook for more
information and vendors.
James Watts
- Navarre, Florida
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Barrel black oxiding is very common and quite simple. Barrels can
be electric driven or manually cranked. The manual being much less
expensive. We recommend the barrel be made of cold roll steel.
Nesting of parts can be reduced significantly if not eliminated
completely with tumbling barrel process.
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Outside of using barrel or baskets for e-coat mass finishing of
small parts does anyone know of any other methods such as conveyor
type machines. Please advise.
Jack Lofstrom
- Harvey, IL
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