Composite called out

[Huong Tran]

can you help interpret this?

[Kelly_Bramble]

You have six cylindrical features than can be manufactured as small as diameter.gif 17.2 and as large as diameter.gif 17.6 and are identified as "A".

This is called a Composite Feature Control Frame:

composite.gif

The upper horizontal frame:

upper.gif

Specifies that the position tolerance of the as-manufactured cylindrical feature derived axis must fall within a cylindrical tolerance boundary equal to diameter.gif 1.4 when the cylindrical feature is manufactured at mmc.gif or MMC (Maximum Materials Condition) that is oriented and located relative to Datum's "A", "D", and "E" when "E" is at mmc.gif

[Kelly_Bramble]

The lower horizontal frame

lower.gif

Specifies that the position tolerance of the as-manufactured cylindrical features derived axis must fall within a cylindrical tolerance boundary equal to diameter.gif 0.2 when the feature of size is manufactured at MMC and is oriented to Datum "A".

[Kelly_Bramble]

Oh, and you might want to check out the book:

Geometric Boundaries, II

http://www.engineersedge.com/catalog...roducts_id/124

[Huong Tran]

Thank much. this is so helpful!!