I would like to ask, among the dimensional tolerance diagrams F1 and F2 in TEMA, which one is generally used?
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As title: I would like to ask, among the dimensional tolerance diagrams F1 and F2 in TEMA, which one is generally used?
Both must be considered. It is very difficult to guarantee such a small tolerance.
Pay attention to the meaning of the two pictures. F-1 is the positional deviation between the nozzle and the nozzle, and the nozzle and the support. F-2 is the manufacturing tolerance for reference. In fact, every manufacturing plant has its own corporate standards. However, most of them are implemented according to GB/T151. 151 integrates TEMAF-1 and F-2, which is also higher than TEMA requirements. If you are interested, you can find out.
F-2 is a manufacturing tolerance that must be met, so the tolerance requirements in Figure F-2 must first be ensured. F-1 is a standard tolerance that needs to be met at the same time.