tolerance for patterned holes
tolerance for patterned holes
(OP)
hi all,
I'm designing a part that has 20 holes in it in a 15 mm distance from the datum A (see in attached picture) , whats important to me is that all the holes centers will be on the same plane within 0.01mm , i dont want to place a +-0.01mm tolerance on the 15 dimension because its not important , the holes can be even 16 or 14 mm away from the base but whats important is that the centers will be on the same plane , what is the correct way to write that on the drawing?
thanks
I'm designing a part that has 20 holes in it in a 15 mm distance from the datum A (see in attached picture) , whats important to me is that all the holes centers will be on the same plane within 0.01mm , i dont want to place a +-0.01mm tolerance on the 15 dimension because its not important , the holes can be even 16 or 14 mm away from the base but whats important is that the centers will be on the same plane , what is the correct way to write that on the drawing?
thanks





RE: tolerance for patterned holes
Select two holes, and make them your secondary datum B and tertiary datum C. Put a sloppy profile all around your 210x30mm outline.
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JHG
RE: tolerance for patterned holes
Tunalover
RE: tolerance for patterned holes
I think you can use composite position tolerance with pattern relating tolerance zone of dia 0.02mm.
Refer to attached image.
Vishal.
RE: tolerance for patterned holes
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: tolerance for patterned holes
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: tolerance for patterned holes