How much would be differenct between these two types of tolerating ?
How much would be differenct between these two types of tolerating ?
(OP)
Hi All
for a cylinder that is supposed to be inserted into another container(cylindrical) how much is it different if I put for its external diameter : 78 h7 (-0.03 ,0 ) or if I dimension it : 78 (-0.4 , -0.02) ?
for a cylinder that is supposed to be inserted into another container(cylindrical) how much is it different if I put for its external diameter : 78 h7 (-0.03 ,0 ) or if I dimension it : 78 (-0.4 , -0.02) ?





RE: How much would be differenct between these two types of tolerating ?
Take a look at the ANSI limits and fits in your Machinery's Handbook. These are based on ISO tolerances. They classify and explain a huge series of fits.
--
JHG
RE: How much would be differenct between these two types of tolerating ?
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: How much would be differenct between these two types of tolerating ?
Using your first method, the limits of size would be 77.97 - 78.00
Using your second method, the limits of size would be 77.60 - 77.98
Seems like a pretty significant difference.
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: How much would be differenct between these two types of tolerating ?
I apologize , the second tolerance was 78 (-0.04 , -0.02), I know the ANSI limits and fits like h7 and so , but sometimes the tolerances are chosen like arbitrary ? that I don't find it in the handbooks , that's why I asked
RE: How much would be differenct between these two types of tolerating ?
If your part is surrounded by nothing but thin air, it doesn't matter.
You have to think in terms of "fit".
So, once again, what is the tolerance on the mating part and what kind of relationship between the two you want to achieve?
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: How much would be differenct between these two types of tolerating ?