How to find press fit/ slip fit for non standard size parts?

Question

I am looking for calculator or chart for slip fit and press fit for non standard size parts.

For example, I have oversized dowel pin 10mm +0.03/+0.01 diameter. I need to create a slip fit hole for that oversize dowel pin. What the size and the tolerance of the hole should be?

Another example is I have an undersized plastic bushing which diameter is 20mm -0.05/-0.02 diameter. I need to create press fit hole for that bushing. What the size and the tolerance of the hole should be?

Srihari Yamanoor · Answer

You will need to decide what standard you want to base your estimates off of and the level of tolerance. There is also the expense and manufacturability to consider. Here is a calculator I found. The site has others as well. I am sure an internet search will lead to other calculators and guidelines:

https://www.engineersedge.com/calculators/mechanical-tolerances/ansi-fit-tolerances.htm

user17332 · Answer

I think, unless you are planning for mass production, you need not search for any standards.you can experiment and decide the values yourself.(Iam not sure about this suggestion.But from what I learnt IT grades are used in mass production of hole shaft assemblies because machining cannot be done precisely and identically for all the parts.In case of single components, I think its not needed)

Answered by user17332 on December 17, 2020

How to find press fit/ slip fit for non standard size parts?

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