Profile tolerance help requested 1

[Spott]

For the wheels we manufacture, we have an outside diameter dimension and tolerance for example 330mm +/- 2mm. We also have a profile tolerance of 2 mm referencing on the mounting face(A) and mounting bore(B) to control wobble.

The way we interpret the profile tolerance is +/- 1 mm from the nominal diameter or surface.

Doesn't this effectively limit the diameter tolerance to +/- 1?
Is there a way to allow the diameter to vary by the +/- 2 while still maintaining the current profile tolerance of 2 or is there a way to reference the profile to the actual measured diameter of a particular wheel instead of nominal?

Simply put, we are OK with the diameter of the wheel being up to 2 mm over or under nominal but we don't want to increase the amount of potential wobble?

Thank you.

 

[chez311]

Are you going by ASME Y14.5? If so - what version?

For the wheels we manufacture, we have an outside diameter dimension and tolerance for example 330mm +/- 2mm. We also have a profile tolerance of 2 mm

I can't fully judge without a more complete view of the feature in question on your print, but going by your description and what little of the print I can see, this is not an acceptable combination (directly toleranced* +/- diameter combined with profile). The diameter needs to either be basic, or directly toleranced* (+/-) with some other control applied.

Simply put, we are OK with the diameter of the wheel being up to 2 mm over or under nominal but we don't want to increase the amount of potential wobble?

Sounds to me like the easiest approach would be to keep the diameter directly toleranced but apply a runout tolerance. This is the typical solution to control "wobble" on round, rotating features - ie: wheels.

*Edited for clarity