PartDesign Revolution

From FreeCAD Documentation
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PartDesign Revolution

Menu location
Part Design → Create an additive feature → Revolution
Workbenches
PartDesign
Default shortcut
None
Introduced in version
-
See also
PartDesign Groove

Description

The Revolution tool creates a solid by revolving a selected sketch or 2D object about a given axis.

Above: sketch (A) is revolved 270 degrees counter-clockwise around axis (B); resulting solid (C) is shown right.

Usage

  1. Select the sketch to be revolved. A face on the existing solid can alternatively be used.
  2. Press the Revolution button.
  3. Set the Revolution parameters (see next section).
  4. Press OK.

Options

When creating a revolution, the Revolution parameters dialogue offers several parameters specifying how the sketch should be revolved.

Type

This option offers five different ways of specifying the length of the revolution.

  • Dimension:

- Enter a numeric value for the angle of the revolution. The default direction is into the support, but it can be changed by ticking the Reversed option.
- Revolutions occur by default normal to the defining sketch plane. This can be changed by specifying another Direction.
- With the option Symmetric to plane the revolution will extend half of the given angle to either side of the plane.
- Negative dimensions are not possible. Use the Reversed option instead.

  • To last: The revolution will be revolved up to the last face of the support in the revolution direction.
  • To first: The revolution will be revolved up to the first face of the support in the revolution direction.
  • Up to face: The revolution will be revolved up to a face in the model that can be chosen by clicking on it.
  • Two dimensions: This allows to enter a second length in which the revolution should extend in the opposite direction (into the support). The directions can be switched by ticking the Reversed option.

Axis

This option specifies the axis about which the sketch is to be revolved.

  • Vertical sketch axis: selects the vertical sketch axis.
  • Horizontal sketch axis: selects the horizontal sketch axis.
  • Construction line: selects a construction line contained in the sketch used by the Revolution. The drop down list will contain an entry for each construction line. The first construction line will be labelled Construction line 1.
  • Base (X/Y/Z) axis: selects the X, Y or Z axis of the Body's Origin.
  • Select reference...: allows selection in the 3D view of an edge on the Body, or a datum line.

Angle

This controls the angle through which the revolution is to be formed, e.g. 360° would be a full, contiguous revolution. The images in the examples section demonstrate some of the possibilities with specifying different angles. It is not possible to specify negative angles (use the Reversed option instead) or angles greater than 360°.

Symmetric to plane

If checked, the revolution will extend half of the specified angle in both directions from the sketch plane.

Reversed

If checked, the direction of revolution is reversed from default clockwise to counterclockwise.

Properties

Below are properties which can be defined after creation of the feature. Data properties Base and Axis are uneditable.

  • DataAngle: angle of rotation. See Angle.
  • DataLabel: label given to the operation, can be changed at convenience.
  • DataMidplane: true or false. See Symmetric to plane.
  • DataReversed: true or false. See Reversed.
  • DataRefine: true or false. If set to true, cleans the solid from residual edges left by features. See Part RefineShape for more details.

Notes

Examples

Example revolution using a construction line as the Revolution axis: In this image the angle is 75°, revolution is about the construction line (Sketch axis 0).

Useful links

A detailed example of use on the forum.