Thermal Expansion.

Calculate the linear dimensional growth of a part due to temperature fluctuations during the machining or inspection process.

Material / CTE

Part Length (in)

Temp Change (Δ°F)

Deviation from standard 68°F (20°C)

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Metrology standards dictate parts are inspected at 68°F (20°C). A part machined at 90°F will shrink when brought to the inspection room.

ΔL = Length × Coefficient of Thermal Expansion × ΔT