How Shaft and Hole Fits Work
Cuándo aplica
Use this guide when drawings show letters and grades but the assembly intent still feels ambiguous in review meetings.
Herramienta a usar
Browser-based preliminary check for Shaft Hole Fit Calculator — fast estimates, not code or stamped design output.
Abrir Shaft Hole Fit Calculator →Pasos
- 1Determine whether the interface needs sliding, location, or press behavior.
- 2Map nominal size to standard tolerance grades for shaft and hole.
- 3Compute worst-case clearance or interference from limits.
- 4Compare against assembly process constraints (press force, thermal shrink, lubrication).
- 5Coordinate with inspection on measurable features and datum scheme.
Ejemplos
- Sliding gear on shaft vs interference bearing seat.
- Location pin that must not seize during thermal expansion.
Qué evitar
- Ignoring surface finish and deformation in tight interference fits.
- Mixing ISO and imperial tolerance systems without conversion discipline.
- Assuming nominal always assembles when limits overlap badly in worst case.
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FAQ
Does this replace GD&T?
No. It supports fit sizing, not full datum referencing.
Temperature effects?
Add thermal expansion checks when service temperature spans are wide.
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