greenimi
Mechanical
- Nov 30, 2011
- 2,391
I am in the design, but I got a question from manufacturing a few days ago. I need a bit of help to answer it correctly. Again, the main thing I don't want to provide bad information.
One of our customers supplied them (manufacturing) with a drawing which has an outside diameter (cylindrical surface) dimensioned with a size dimension as follows:
Ø .237 ±.003 with I symbol attached. (per Y14.5-2009)
Then the same OD has a cylindricity within .015 and a circularity within .008 applied.
The question from manufacturing: if the size tolerance is to be within .006 and all the actual local sizes are to be within .006 (.234 - .240) then how the circularity can be within .008. In their opinion any value bigger than the size tolerance does not make sense.
I don’t know the customer application; we are just making the parts for them per the print requirements.
One of our customers supplied them (manufacturing) with a drawing which has an outside diameter (cylindrical surface) dimensioned with a size dimension as follows:
Ø .237 ±.003 with I symbol attached. (per Y14.5-2009)
Then the same OD has a cylindricity within .015 and a circularity within .008 applied.
The question from manufacturing: if the size tolerance is to be within .006 and all the actual local sizes are to be within .006 (.234 - .240) then how the circularity can be within .008. In their opinion any value bigger than the size tolerance does not make sense.
I don’t know the customer application; we are just making the parts for them per the print requirements.