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E-coating of parts that were manufactured to size

We are currently manufacturing shafts with include key-ways - with the OD of the shaft holding to tight tolerances. If the shaft is to size before e-coating will it maintain that size or does the coating "add" size?

Michael Colyer
parts manufacturer - Toledo, Ohio
February 2, 2010

Hi, Michael. E-coating adds size, but not as much as most platings and coatings. some E-coatings are only a couple of ten-thousandths of an inch whereas powder coatings may be 10x thicker.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
February 3, 2010

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