Prints / Drawings - What Problems and Experiences Have You Had with Prints?

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Miner

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Staff member
Admin
#22
My story isn't so much about the print as much as a supplier's interpretation of it.

We sourced a cast product in China/Taiwan/Korea (can't remember which). The drawing was dimensioned correctly, the draft angle specified and the relevant USA casting standard referenced.

The supplier built the tooling and submitted a PPAP, which was promptly rejected. Turned out that the supplier, which was a reputable casting source, assumed the use of a regional/national standard that interprets the draft in relation to the dimension exactly opposite of the USA standard.

Using their standard, the part would have met print 100%. Lesson: Get and use the refenced standards. Don't make expensive assumptions.
 

Jim Wynne

Staff member
Admin
#23
My story isn't so much about the print as much as a supplier's interpretation of it.

We sourced a cast product in China/Taiwan/Korea (can't remember which). The drawing was dimensioned correctly, the draft angle specified and the relevant USA casting standard referenced.

The supplier built the tooling and submitted a PPAP, which was promptly rejected. Turned out that the supplier, which was a reputable casting source, assumed the use of a regional/national standard that interprets the draft in relation to the dimension exactly opposite of the USA standard.

Using their standard, the part would have met print 100%. Lesson: Get and use the refenced standards. Don't make expensive assumptions.

I've also seen instances where Far East suppliers thought it was OK to use what they thought was an equivalent of an ANSI or SAE standard (usually a JIS document) without telling anyone.
 
D

diptankd

#24
Hello
I have had a problem with drawings during a first article that the specs called out inspections that where not on the drawings.:bonk: This was a nightmare to solve but, finally we got it resolved it was a slow process but I passed first article.
 
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