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Today we will talk about admissions and landings. Of course, the first thing that comes to mind is the table of tolerances and landings. But this time it will not be so banal, since the system of admissions and landings is not only a table, but also an understanding of how to use it in practice. For example, if we need to determine the tolerance and fit of the holes, these are some tables if the shafts are completely different reference materials. For this reason, the tolerances and fitments of the shafts and holes must be selected together, because in most cases these are mating parts. This will help us with the table of tolerance and fit of shafts and holes that will give us an idea of the basic and General tolerances. In the post-Soviet countries, a unified system of admissions and landings has been introduced, which combines all production and industries. Do not forget that the maximum size deviations allow us to understand what limits we can not go or how to go when making parts. After all, when manufacturing a part, it is very important to know all the dimensions, maximum deviations, tolerances, and much more for sure. This can be the upper limit deviation of the part size and the lower one. Which differs from the nominal value. In this video lesson, we will look at the example of how to set the maximum deviation of shaft sizes. And so are the holes, but the shaft and hole tolerances are very closely related. Table of tolerances shaft attracts and the tolerances of the hole. Any General tolerances and size tolerance on any part in mechanical engineering and beyond are very easy to define and assign. And it is worth noting that the tolerances on the drawings are also very important to specify, for a better understanding of them.
#tolerances #dopustimoi #obidovsky
10 мар 2020
