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 44027
Finishing Fallout
[Connecticut]
February 14, 2007
As a Quality Professional of 35 yrs, I have come across various
finishing operations done subsequent to manufacture. In each type of
finishing operation, each & every Finisher seems to have thier
own Fallout % that we, the manufacturer, is suppose to "Allow" for.
While I do indeed understand some of this "Tribal" knowledge is based
on degree of experience, type of finishing, etc -isn't there some
guidelines. For example, Rubber Bonders need 10%, platers need 5 %
for parts over 2 sq. feet surface, 10 % for smaller parts, vibra
& tumblers need 1%, etc. Is there any uniform guidelines that are
used? I am hard put to believe that an Industry that has been in
existence for Hundreds of years, hasn't come up with some Standard.
But then again, maybe we Quality Professionals aren't being paranoid
in thinking the Finishing Industry is keeping it a Secret!
Sharen A Gutierrez
stampings - Stratford, Ct, USA
February 15, 2007
On the one hand most plating shops will put standard terms in the
contract that are in fact negotiable, Sharen. On the other hand, 100
percent satisfactory parts is impossible. So that's what brings you
to where you are.
I think 5 to 10 percent fallout would be very high for most
plating shops for most types of parts, but consider this case: you
ship low quality zinc diecast parts with cold shuts to a plating
shop. The parts cost a nickel to cast and a dime to plate. If you
ship such parts to the plating shop, what would you have the plating
shop do? They are not going to keep trying a 10-cent process
repeatedly until they salvage that 5-cent part. Some of those
parts probably could have been salvaged if vacuum impregnated before
they started, but have you or have you not allowed for that cost, or
do you leave it up to the shop to decide which way to quote?
I believe the right approach is to visit the plating shop, sit
down with them, and work it all out. But if you want to treat plating
of your parts as a commodity, when the parts you ship are variable in
their plateability, the problem will continue.
 
Ted Mooney, P.E.
finishing.com Inc. - Brick,
NJ
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