How Shaft and Hole Fits Work

适用场景

Use this guide when drawings show letters and grades but the assembly intent still feels ambiguous in review meetings.

要使用的工具

Browser-based preliminary check for Shaft Hole Fit Calculator — fast estimates, not code or stamped design output.

打开 Shaft Hole Fit Calculator →

步骤

  1. 1Determine whether the interface needs sliding, location, or press behavior.
  2. 2Map nominal size to standard tolerance grades for shaft and hole.
  3. 3Compute worst-case clearance or interference from limits.
  4. 4Compare against assembly process constraints (press force, thermal shrink, lubrication).
  5. 5Coordinate with inspection on measurable features and datum scheme.

示例

  • Sliding gear on shaft vs interference bearing seat.
  • Location pin that must not seize during thermal expansion.

应避免

  • 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.

相关工具

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工程 中的更多内容

所有任务指南 或前往 工程 专区.

常见问题

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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