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Fit Tolerances

Fit tolerances are available for dimensions in the Dimension PropertyManager. Fit tolerances are used typically for shafts in holes.

See Example: Fit Tolerances.

dim_tol.png Tolerance Type You can choose from the following types for showing Fit tolerances:
  • Fit
  • Fit with tolerance
  • Fit (tolerance only)
PM_dim_tol_fit_class.gif Classification You can choose from the following classifications. The shaft and hole tolerances available are filtered to correspond to the classification.
  • User Defined
  • Clearance
  • Transitional
  • Press
PM_dim_tol_hole.gif PM_dim_tol_shaft.gif Hole Fit and Shaft Fit You can choose standard Fit tolerances from the hole and shaft lists. The software automatically checks whether the standard is appropriate for the dimension. When you select either a hole or a shaft Fit tolerance, the list for the other type is filtered to present only corresponding tolerances. The bilateral tolerances are also calculated automatically.
The Classification aid for selecting an appropriate Fit designation is either Hole Basis or Shaft Basis, depending on which Fit designation you choose first. As Hole Basis and Shaft Basis Fit classifications in the international standards are not fully bi-directional, you may get a different list of suggested Fit choices (or an empty list) depending upon the order in which you choose your designations. Hole Basis is preferred for most manufacturing processes.
  Automatic Versus User Defined Tolerance:

The advantage of letting the SOLIDWORKS software calculate the bilateral tolerance values for you is that if the dimension changes, the tolerances are updated automatically. To set tolerances manually, click the Hole Fit or Shaft Fit icon and type values in the Maximum Variation PM_max_variation_dim.gif and Minimum Variation PM_min_variation_dim.gif boxes. Select Show parenthesis to insert parenthesis around the tolerance values (Fit with tolerance only).

  Fit Tolerance Display For Fit or Fit with tolerance with both hole and shaft tolerances, you can select a display style.
  • Stacked with line display PM_dim_tol_fit_withline.gif
  • Stacked without line display PM_dim_tol_fit_stacked.gif
  • Linear display PM_dim_tol_fit_linear.gif

With Fit (tolerance only), the Fit standards are not displayed.



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