Datums on circular features

[Avital]

Hi,
I am trying to set a hole as a datum reference to another set of holes but can't work out how to set up a datum reference on the first hole. Does anyone know how to set it on the hole surface.
Cheers!

[willwad]

Not sure exactly what you have in mind. You can set an axis (presumably, the axis of revolution for the hole) as a Set datum (in WF3.0, right-click on the axis-->Properties). Then you can call out GD&T referencing the datum axis on the drawing.

If you're trying to create an axis on the hole surface itself for whatever reason, you will probably have to create a couple of points on the surface and then create an axis through the points.

You may need to include a little more information if this doesn't answer what you're getting at.

[Gearbox]

Hi,
You can attach it to the hole diameter dimension.
Cheers!

[pro_climber]

Avital,
Can you post a pic? If what you want is to create a datum plane passing thru two holes, you can do it by creating a datum plane passing thru the two axes. If it is something else, please post a pic.