The Revolve feature allows you to create a wide variety of symmetrically round shapes like those shown below simply by drawing a flat 2D shape.




pawn_front pawn_3d

For example, the 2D shapes on the left above, when revolved, results in the 3D shape on the right.

To create a Revolve shape:
  1. Choose File | New.
  2. Choose View | Top.
  3. Draw a circle and set the diameter to the largest diameter of the shape.
  4. On the numeric bar set Z to the overall length of the shape.
  5. Choose View | Front.
  6. In the right side of the dotted axis line draw a 2D closed shape that touches 3 sides of the rectangle (see above). Keep the shape away from the center axis if you want a center hole. There must be no overlapping lines or open lines.
  7. Select all the lines and click the Group button.
  8. On the numeric bar set Z to Revolve.
  9. Choose View | 3D.

To add tapping or threading with a Revolved shape use Comments To Machinist as Line | Machine | Tap & Thread is not currently supported with the Revolve feature.

You can add additional features to Revolved shapes. For example you might want to add flats, side holes or any other non-revolved shape.

To add additional features to a Revolved shape:
  1. Select the appropriate view from the View menu, other than the view containing the Revolve line.
  2. Draw the desired additional feature.
  3. Set the Z value.
  4. Choose View | 3D to check the result.

Examples of the above method of adding a feature to a Revolved shape:

  • For a chess pawn sliced down it’s center: Draw the side profile in the Front view and set Z to Revolve. Then, in the Top view draw a D shape and set Z to Air Inside.
  • For a wrench flat: Draw a rectangle in a side view and set Z to a negative value.

For a two half mold of a turned part see this example from the forum.