Which outcome occurs when exceeding the positional GD&T tolerance during CNC lathe machining of a steel shaft with tight press-fit requirements?

💡 Explanation

Exceeding positional tolerance leads to interference stresses around the press-fit, because increased stress concentration from the shaft's eccentricity promotes crack initiation under cyclic loading via the stress concentration mechanism, therefore, earlier fatigue failure occurs, rather than an improvement; other options don't depend on mechanical stresses exceeding limits.

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