PCB Suppliers,
Continental Circuits (PHX) generally pin gauges holes to determine the
actual size. Our SOP has been to use a pin
.001 smaller than the bottom of the tolerance. That is, for a .043
+/-.003 hole we would use a .039 pin. If this passes through
with normal pressure, we say the hole is at least .040 and is in
tolerance. I can't find this technique documented anywhere and have a
customer who disagrees. They use the same size pin as the bottom of
the tolerance.
How do you measure holes? I could use some support for our method.
Rich Olsen
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Richard Olsen Telephone (602)-232-9154
Continental Circuits Corp. Main (602)-268-3461
3502 East Roeser Road Fax (602)-268-0208
Phoenix Arizona Pager (602)-310-6245
85040-2905 Internet [log in to unmask]
USA I make circuit boards,what do you do?
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