Ring Gages to Check Size Dimensions

[@465maltbie]

Thank you. Charles

[@Mateusz_16425]

Timestamp: 5:32 => The Limits of Size are applied on diameter. Circularity tolerance defines tolerance zone of two concentric circles offset from each other radially by the tol. value. If LoS were applied on radial basis, it would be 1.0010 to 1.0025. By my understanding, it means that LoS define Circularity of .0015 (instead of .003). Please correct me if i this is wrong.

[@Gdandtbasics]

The limits of size for a diametric feature should always be applied on a diametric basis and not radial. Rule #1 for a cylinder will always result in form control (cylindricity and circularity) that matches the total size tolerance for the diametric feature.

[@Mateusz_16425]

@@Gdandtbasics Please have a look at Fig. 5-10 in Y14.5-2009, especially the "Means this" section of that figure. It shows that the Circularity tolerance is defined by two concentric circles. These circles ar offset from each other radially by the tolerance value. If we calculate the Circularity from the Limits of Size of the example in the video, it would be (2.005 - 2.002) / 2. This gives the result of Circularity equal to .0030/2 = .0015 (half the value mentioned in video).

[@Mateusz_16425]

@Gdandtbasics :)