Question

What is the rule 2 of GD&T?

Answer 1

Rule #2 of GD&T (Geometric Dimensioning and Tolerancing) is the **"Regardless of Feature Size (RFS)"** rule.

This rule states that the tolerances applied to a feature are the same regardless of the size of the feature. In other words, the tolerance is fixed for any size of the feature within its specified range, meaning that the size of the feature does not affect how much it can vary within the specified limits.

Here’s a breakdown:

1. **RFS applies to all features** unless otherwise stated.
2. The feature size can vary, but the allowable variation in the feature's geometry (like position, flatness, or profile) remains the same, even if the size changes.

For example, if you have a hole and you apply a positional tolerance (e.g., 0.2 mm), that tolerance holds true whether the hole is small or large within the specified limits. The tolerance doesn't change based on the hole’s actual size.

This rule helps ensure that parts can be manufactured and assembled accurately, even if the size of the features varies slightly.

Does that help clarify things?