gen-state-tolerance-and-fit-in-machining-precisely-and-explain-w-af80

State tolerance and fit in machining precisely and explain why it matters in 2-3 sentences.

# Tolerance and Fit in Machining **Tolerance** is the permissible range of variation in a dimension, expressed as the difference between maximum and minimum acceptable sizes (e.g., 50mm ±0.05mm). **Fit** describes the clearance or interference relationship between two mating parts, such as a shaft and hole, classified as clearance fit (loose), transition fit, or interference fit (tight). These concepts are critical because they determine whether parts will assemble correctly and function as intended—too loose causes wobbling or leakage, while too tight prevents assembly or causes jamming. Proper tolerancing also balances manufacturing cost with functional requirements, as tighter tolerances require more precise (and expensive) machining processes.