Which outcome results when a CNC lathe's coolant supply degrades, leading to increased thermal fluctuations during high-speed machining of hardened tool steel?

💡 Explanation

Accelerated tool wear results because inadequate cooling from the coolant supply failure reduces **quench hardening**, thus the tool softens and wears faster due to increased friction. Due to the elevated temperatures, severe abrasive wear emerges therefore rapidly accelerates tool wear, rather than improving tolerances.

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