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Ovality Confusion

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Hey guys,

This is one of the problems that we as a company face during our quality audit. We cater machined products to the customers and we recently had an argument on how much ovality can a hole have it its tolerance and dia is given. For example, lets consider we have a hole of 55mm with a tolerance of +0.05/-0.05. Present scenario is that the ovality of that hole can be (0.05+0.05)/2 that is 0.05mm. But i am not able to find any proof from the standards to back it up. So i appriciate your help in this topic and if you can also provide with the source of your opinion, that would be really helpful. Thanks in advance.


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