Interference fits (press fits or shrink fits) join cylindrical mechanical assemblies—such as bearing races onto drive shafts or gear rings onto hubs—by heating the outer collar to expand its bore or chilling the inner shaft before mating. In this mechanical engineering workspace, fit parameters are configured with three variables: a nominal shaft interference dimension ($V_1$), a thermal expansion coefficient ($V_2$), and a mating clearance divisor ($V_3$).

The utility derives the primary mechanical grip index ($[V_1 imes V_2] / max(0.01, V_3)$), the root structural strain factor ($sqrt{max(0, V_1 imes V_2)}$), and the relative thermal fit engagement share ($[V_1 / (V_1 + V_2)] imes 100$).

### Distinct Worked Calculation Evaluating a thermal shrink fit for a turbine shaft bearing sleeve: - Shaft Interference Dimension ($V_1$): 118 - Thermal Expansion Multiplier ($V_2$): 22 - Assembly Clearance Divisor ($V_3$): 4

Step-by-step results: - Primary Grip Metric: $(118 imes 22) / 4 = 2596 / 4 = 649.00$ - Structural Strain Root: $sqrt{118 imes 22} = sqrt{2596} approx 50.95$ - Fit Engagement Share: $[118 / (118 + 22)] imes 100 = (118 / 140) imes 100 approx 84.29%$

### In-Browser Mechanical Sizing Note Every machining calculation runs entirely in client-side JavaScript. Shaft diameters, metal alloy types, and temperature values are evaluated locally with zero remote data collection.