GD&T for Radius (Fillet)
GD&T for Radius (Fillet)
(OP)
Hi,
Please guide me in giving GD&T to a radius (fillet). i have attached a ppt which explains my problem.
We have the interference problem when the male and female flanges are manufactured to the worst case.
Thanks
Please guide me in giving GD&T to a radius (fillet). i have attached a ppt which explains my problem.
We have the interference problem when the male and female flanges are manufactured to the worst case.
Thanks





RE: GD&T for Radius (Fillet)
Thanks,
RE: GD&T for Radius (Fillet)
RE: GD&T for Radius (Fillet)
You have already determined that your inside radius should be R 0.13-0.17 to work.
You can apply position tolerance and MMC (bonus tolerance) to the mating diameter (Dia 21.32-21.45)that radially locates the male radius, but not to the radius itself. That requires that you relate this diametral feature to a diametral datum (OD or bore) and that the diametral size and position tolerance is sized to not exceed the limits of the mating part, whose dimensions are not specified on your sketch.
Bottom line, your radius is too big.
RE: GD&T for Radius (Fillet)
They I would use an undercut on the male side, where the radius is at, to allow any build up of dirt or shavings to accumulate when the two parts are mated together.
Assuming that you can't do the above, then I would undersize your radius on the male part and use a MAX callout on the radius a few thousandths under what is the actual max before they bottom out.
So your radius callout would be something like R0.15 MAX should suffice.
RE: GD&T for Radius (Fillet)
1. Actually, your female flange should be male and the male flange should be female, in order to prevent any confusion I will use your terms.
2. Since your female part won't be changed, so you may use your CAD software to define a new radius outline with basic dimension based on female flange, this new outline feature is a profile.
Then, you may use profile tolerance to control the interference between them by :
*To choose unilateral inside tolerance for female part.
*To choose unilateral outside tolerance for male part.
SeasonLee
RE: GD&T for Radius (Fillet)
thank you
RE: GD&T for Radius (Fillet)
The reason for again uploading the file is last time the uploaded file name had specials character so it will not open.
thanks,
RE: GD&T for Radius (Fillet)
RE: GD&T for Radius (Fillet)
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services