What are the deviations for 145H8/d9 based on tolerance tables?

AI Thread Summary
The discussion focuses on understanding the deviations for the tolerance designation 145H8/d9. The term 145H8 refers to a socket or hole, while d9 pertains to a shaft, indicating a relationship between their dimensions. The nominal size of 145 is consistent for both H8 and d9, suggesting that the inner diameter of the socket equals the outer diameter of the shaft. Participants express confusion about the meaning of the "/d9" notation and its implications for calculating tolerances. The conversation highlights the need for clarity in machine design terminology and the appropriate forums for such discussions.
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Determine, by using the attached tolerance tables,the deviations for 145H8/d9 .

for only 145H8 ,i know what i mean but 145H8/d9 what does it mean??

pls help
thanx
 
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I don't have the formal definition with me, but for quick reference here we go:

Capital letter refers to sockets or holes, while small letter refers to shafts. Remember this form: Socket/Shaft
 
ok...but then for 145H8/d9 , do u mean the nominal=145 is the same for H8 and d9??

bacause normally i know how to solve 145H8 but for 145H8/d9 which there appears a /d9, what should i do with it??
 
This is because

"Inner diameter of the socket (tube) = 145 unit = outer diameter of the shaft."

Hence, there is no point repeating 145 twice.

By the way, why are you posting machine design problem here in Advanced Physics forum?:smile:
 
because i post on the other forum,and got little replies,so i try it out here
 

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