Plastic Linear Tolerances?

[MugenPower]

I have modeled several long plastic parts - some made from PC and others are a PC/ABS blend - thatare up to 19" long so I need to place a table on the drawings that will supercede the general tolerance block with more "real-world" tolerances. I've been given some pretty dated information (circa 1967) as to what tolerances are manufacturable for the resins but I would like to use something more curent (we have made some advancements since then, right?). I've already Googled my fingers to the bone, looking.Could anyone point me to a good source? TIA

 

[gigant]

In Germany we have for mold plastic parts the DIN16901.

http://www.techstreet.com/cgi-bin/detail?product_id=9350

http://www.beuth.de/langanzeige/DIN+16901/1003790.html

 

[MugenPower]

Since the DIN document isnot free, I am hesitant to purchase it without knowing if it has been updated to include tolerances for PC/ABS blends. The old version (November 1982) that I have a partial copy of does not. Could anyone check this out for me?

 

[dr_gallup]

Material suppliers offer lots of free design guides.

 

[Tobyk]

I poked around a bit with google (since I was interested too) and found this:


[url]http://www.bopla.de/en/technical-information/general-technic al-information/general-technical-information/general-informa tion-on-plastics/tolerances-of-plastics.html [/url]


Tobyk