@@TheEssenceofknowledge Hi you are really good and too quick to response...I did many video lecture they confused a lot, but you made it too simple at least for me.
Amazing lecture sir. But one question remains on my mind. Is in the second scenarios you have shown (Straightness applied on dimension) the measurement of the diameter and of the straightness different things? I mean is acceptable a 20.03 diameter shaft with a .02 straightness tolerance?
Thanks. Rule 1 is size tolerance must be respected. In this case envelop is 20.03 with form error. If we measure dimension at any cross section it should be with in size tolerance. But suppose shaft is distorted and cross section it at MMC, part with in envelope 20.03 will be accepted. Let me know if this make sense. Regards, Bipin
Yes, always tolerance depend upon required fit. In addition you can say RFS- REGARDLESS OF FEATURE SIZE- it is applied when positional shift or orientation is not allowed to vary more than a limit like in keys. RFS should be given as it is more precise. MMC Modifier is given when maximum material condition is critical and a specific value of tolerance can be allowed on MMC. When component departs from MMC a bonus tolerance added. Same for LMC. Always everything depends on functional fit requirements. Let me know your further queries.
Best explanation 1000/100.....thank you sir
thank you!!
Whether rule 1 applicable to flat surfaces or it is only applicable for shaft and hole?
Rule one is applicable to everything. Limit of size must be respected always.
Another question besides yours incredible lectures is there any book you recommend for GD&T begginers learners?
I refer ASME2009 Y14.5. some time ago I have gone thru a book by Alex Krulikowski. It is good but I still recommend standard itself.
And does the standard itself contains examples? I mean is ita didatic document? Can begginers understand and apply GD&T?
@@o3024 it has diagram and details but beginner may find it slightly difficult.
Nice lecture but I am confused
If we give Gtol on Dimensions, is it applicable on axis (tolerance zone on axis) ?
Not always. for positional Gtol, it is on axis. For circularity, runout etc it's on surface. So it depends
@@TheEssenceofknowledge
Hi
you are really good and too quick to response...I did many video lecture they confused a lot, but you made it too simple at least for me.
Amazing lecture sir. But one question remains on my mind. Is in the second scenarios you have shown (Straightness applied on dimension) the measurement of the diameter and of the straightness different things? I mean is acceptable a 20.03 diameter shaft with a .02 straightness tolerance?
Thanks. Rule 1 is size tolerance must be respected. In this case envelop is 20.03 with form error. If we measure dimension at any cross section it should be with in size tolerance. But suppose shaft is distorted and cross section it at MMC, part with in envelope 20.03 will be accepted. Let me know if this make sense. Regards, Bipin
THANKS!!!
straightness symbol on dimension....tolerance applicable for LMC?
yes we can apply straightness with both modifiers MMC and LMC. Let me know any other queries.
Can you please provide the Rule 1 and Rule 2 more detail.
Anil Keetha, I will include details in coming video. Thanks.
Thank you
Why in RFS condition we are not consider the bonus tolarence
itsrahul , as MMC modifier is given on GTOL we get bonus tolerance. If no modifier is there, it will RFS and tolerance zone will not change
What about remaining lecture classes on gd&t
Y Sashi , Sorry for being late. Was not good. It will be in this week.
thank you very much sir.
Waiting for next video sir.....
Coming soon..
If someone ask 'Why MMC, LMC & RFS modifiers are used ?' What should I say ?
Can I give an answer like "proper function and fit of parts"...
Yes, always tolerance depend upon required fit. In addition you can say RFS- REGARDLESS OF FEATURE SIZE- it is applied when positional shift or orientation is not allowed to vary more than a limit like in keys. RFS should be given as it is more precise. MMC Modifier is given when maximum material condition is critical and a specific value of tolerance can be allowed on MMC. When component departs from MMC a bonus tolerance added. Same for LMC. Always everything depends on functional fit requirements. Let me know your further queries.
Very good explanation sir. Waiting for upcoming lectures... Upload as soon as possible...
enaganti purushotham , yes sure... In process
Hi ,
Nice classes