Composite Position Tolerance for Coaxial Holes
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This advanced video shows composite position tolerance in ASME Y14.5-2018 and the difference between two single segments. The video uses coaxial holes to illustrate the concept. Remember: the datum feature references constrain rotation only in the lower segment of composite!
This is a sample video from our GeoTol Pro 2020 online course per ASME Y14.5-2018
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Пікірлер: 9
This man is amazing! I understood this subject after I listened this man. Thank you very much!
Thank you for giving more clarity on composite FCF
Thank you
Great. Thanks for sharing knowledge.
The simplest approach is to use the Continuous Feature Symbol (CF) to indicate that those holes should be treated as one, avoiding confusion for inspectors and minimizing costs, as using composite tolerancing in this scenario defeats the purpose of GD&T, which is aimed at cost reduction.
@GeoTolPro
4 ай бұрын
Continuous feature is the same as coaxial within zero at MMC (rule #1 now controls coaxial). The composite position instead allows 0.1 at MMC and allows more tolerance than CF for this application.
Is it compulsory for the MMC symbol to be put at the lower frame?
@GeoTolPro
Ай бұрын
No, you don't have to add the MMC modifier. However, the tolerance in the lower frame is usually (not always) calculated based on the MMC clearance between hole and pin so it makes sense to add the mmc modifier.
Pl use pointer