Introduction to Tolerances - Part III: How are Tolerance Limits Defined?

The previous videos in our Intro to Tolerances series have answered the questions, “What is a tolerance?” and “Why use tolerances?” This third and final article in the series explores how tolerance limits are determined and what types of tolerances exist.

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Hi sir, Thank you so much for making this video possible and putting it out here for us.

As a GAE, i wonder why some big corporations still use those machining handbooks to determine tolerances (maybe they would try to approach some level of perfection, not that of PolyWorks or RD&T for instance) while we have got such technological tools as Polyworks and RD&T. In and with RD&T, we can be %100 percent sure what components of an assembly would have the most contribution factors with it comes to determining Tolerances. And in and with PolyWorks we can be %100 percent sure how those tolerances that were determined previously would play out, how they would impact on an entire part and where deviations are mostly high or low. In a nutshell, i do not understand why those companies would still try to catch perfection using those books that will not reflect reality after a part is manufactured. Does that make sense?