Are Reference Dimensions denoted on a Drawing differently in China?

QMMike

Involved In Discussions
#1
This isn't the first time I've come across this. I am PPAPing a part that we make, have a mold drawing and a part drawing. The part drawing has the basic dimensions called out on it, but ALL the dimensions are in parenthesis. The first time I came across this I submitted PPAP to our customer and included NO Measurement data, only information that verfied conformance to the notes / material. They did call me out on it and when I told them that every dimension on the drawing was reference they said, "OK", signed the PSW as approved and it was done.

Our TS auditor called me out on it as well during our last audit -- I told him what I stated above and he said, "OK" and that was that.

Now the reason for my post.... My latest part that I am trying to PPAP, I have the drawing from China, with our customers handwritten part number/rev level on it (by them) and all the dimensions are again in parenthesis. Only this time, there isn't even a material type listed! Only that the part is to be black! I think this is a bit silly, but the lazy side of me says --- just show conformance that the part is black. -- - btw, material type is not stated on the PO nor are any other requirements.
 
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Jim Wynne

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#2
Re: Anyone know if reference dimensions are denoted on a drawing differently in China

This isn't the first time I've come across this. I am PPAPing a part that we make, have a mold drawing and a part drawing. The part drawing has the basic dimensions called out on it, but ALL the dimensions are in parenthesis. The first time I came across this I submitted PPAP to our customer and included NO Measurement data, only information that verfied conformance to the notes / material. They did call me out on it and when I told them that every dimension on the drawing was reference they said, "OK", signed the PSW as approved and it was done.

Our TS auditor called me out on it as well during our last audit -- I told him what I stated above and he said, "OK" and that was that.

Now the reason for my post.... My latest part that I am trying to PPAP, I have the drawing from China, with our customers handwritten part number/rev level on it (by them) and all the dimensions are again in parenthesis. Only this time, there isn't even a material type listed! Only that the part is to be black! I think this is a bit silly, but the lazy side of me says --- just show conformance that the part is black. -- - btw, material type is not stated on the PO nor are any other requirements.
Absent an agreed-upon standard or an explanatory note on the drawing, there's no telling what was intended by putting dimensional callouts in parentheses. I think you need some guidance from your customer as to what's expected. Just because they accepted your "reference" claim once doesn't mean they'll do it again.
 

Michael Malis

Quite Involved in Discussions
#3
Re: Anyone know if reference dimensions are denoted on a drawing differently in China

You need more information.

"Black" part can be metal, plastic, soft, hard, etc.
Dimensions also can be in metric system.

Please ask your customer to clarify material and dimensions.
 

QMMike

Involved In Discussions
#4
Re: Anyone know if reference dimensions are denoted on a drawing differently in China

You need more information.

"Black" part can be metal, plastic, soft, hard, etc.
Dimensions also can be in metric system.

Please ask your customer to clarify material and dimensions.
That was my thought too...

I said, we could ship them parts made from black liquorice and we would comply with the current requirements :lol:
 

QMMike

Involved In Discussions
#6
Re: Anyone know if reference dimensions are denoted on a drawing differently in China

Thanks! I'm not expecting a problem with it, was really just curious if Standard drawing practices differ much in China.
 

Michael Malis

Quite Involved in Discussions
#7
Standards are the same, however general understanding is not.
I learned this over the last 20 years of dealing with China...
 
G

gbcqc

#8
Wondering, when your company quoted the part, what was quoted? What material was used to base a material price (plastic or gold)? I guess I just can't see quoting a product with so many questions.:nope:
 
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