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TED7 (Mechanical) (OP)
22 Mar 11 9:32
Is there a way of implicitly stating the orientation a DIN509 undercut is to be applied?

The bit of standard I have doesnt say so (although I only have 1 page of it and it's in German). For those not sure, DIN509 undercuts are not symetrical about the bisection of the corner.
As much as I trust the machinists to look at the part and do it the right way round, I would like to be 100% clear on the drawing anyway.

Drawing standard by the way is what ever the ISO standard is (I have been drawing to BS8888 since I started and it's matched up fine so far)

I have included a shot of how I am currently applying the detail.

Many thanks.

Will
Sheffield UK
Designer of machine tools - user of modified screws

KENAT (Mechanical)
22 Mar 11 10:52
(I have been drawing to BS8888 since I started and it's matched up fine so far)

FYI That would be because BS8888 is a compendium of the BS versions of the various ISO & EN standards.

I'm afraid I don't know the answer to your actual question though, sorry.  

Posting guidelines FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm? (probably not aimed specifically at you)
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?

pmarc (Mechanical)
22 Mar 11 12:09
ninja182,

I have German copy available.
However I think attached excerpts from the standard clarify the issue quite precisely.

http://files.engineering.com/getfile.aspx?folder=1e0606dc-7d24-4c23-b8ca-07ef6c8a1df7&file=DIN509_undercut.JPG
 
TED7 (Mechanical) (OP)
22 Mar 11 19:16
Kenat, I remember 308 being pretty much the same as our european sister companies at the time other than the dot for a decimal point. That went when 8888 proposed the comma.

Pmarc, thanks for the file. It looks to be a newer version of the one I have. I think I'm going to have to source myself a german speaker from somewhere tomorrow.

Will
Sheffield UK
Designer of machine tools - user of modified screws

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