Tolerance Tab

The Tolerance tab in the Properties dialog box lets you modify dimension properties. It appears when you right-click a dimension and then select Properties.

The table below details the various types of tolerances:

Tolerance Example
Numerical tolerances
Alphanumerical tolerances
Combined tolerances (an alphanumerical value and two numerical values): ISOCOMB tolerance

Main Value, Dual Value

Important:
  • Dual value properties are only when the Show dual value option is selected on the Value Tab.
  • For a full description of the tolerance type selected, click the information icon on the left of the field.
  • If you choose the same tolerance type for main and for dual value, then the values for this tolerance will also be the same.

  • Main value: defines the main value tolerance display.
  • Dual value: defines the dual value tolerance display.

Upper value

Defines the tolerance upper value. This option is only available for numerical tolerance display.

Lower value

Defines the tolerance upper value. This option is only available for numerical tolerance display.

First value

Defines the tolerance first value. This option is only available for alphanumerical tolerance display.

Second value

Defines the tolerance second value. This option is only available for alphanumerical tolerance display.

Important:
  • For dimensions with alphanumerical tolerances, you can display the corresponding numerical equivalents in the drawing, simply by selecting the dimension and placing the cursor over the tolerance in the drawing. The numerical equivalents are displayed in a tool tip.
  • For dimensions with tolerance js and JS, there is no correspondence between the numerical and alpha numerical value. The numerical value displayed is +-0 or the previous numerical value applied to the dimension.