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What does abreviation "BSC" mean in package dimensions


Record #2027

Problem Title:
What does abreviation "BSC" mean in package dimensions


Problem Description:

The Legend for most of the package diagrams in the data book
contain a parameter "BSC".   What does this abreviation stand
for.


Solution 1:

BSC Represents theoretical exact dimension or dimension target.

BSC is short for "BASIC" or "Basic Space between Center." It is a
numerical value used to describe the theoretical exact size, shape
or location of a feature or datum target. It is the basis from which
permissible variations are established by tolerances on other
dimensions, in notes or by feature control symbols.

Basic dimensions are shown on the drawing enclosed in a rectangle.

Ref. (short for Reference) is also shown by some dimensions of
package drawings. These reference callouts state the nominal
dimensions normally without tolerance.






End of Record #2027 - Last Modified: 10/06/98 16:09

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