Creating a Step Bore feature

To create a Step Bore feature:

1. Click the Features step in the Steps panel.
2. Select Step Bore and click Next to open the New Feature - Dimensions page.

The default Step Bore feature has two steps. Each step corresponds to a row of the table.

To modify the top step:

1. Click the top row in the dialog. The initial values for this step are entered into the dimensioned drawing.
2. Edit the Diameter, Radius, and Depth for this step.

   The Depth is measured from the top of the Step Bore feature, not the top of the current step.

   Chamfer — Optionally enter the depth of a 45 chamfer cut at the top edge of the feature. Leave this value at the default, 0, for no chamfer.

3. Optionally select Through and Single Point Bore:

   Through — This sets the display of the Step Bore without a bottom.

   Selecting Through does not make the feature pass all the way through the stock. You must set the depth value deep enough.

   Single Point Bore — This sets the step to be finished with a boring bar. This mills the step to a tight tolerance. Select the option if you want to finish the step with this technique.

4. Click Set to update the values in the table.
5. To modify the second step, repeat this process on the second row of the table.

To add an additional step:

1. Click the row in the table after which you want to insert.
2. Enter the parameters and click Add to insert the step parameters into the table.

To delete a step:

1. Select the row in the table.
2. Click Delete.

When you have finished entering the Step Bore dimensions:

1. Click Next to open the New Feature - Location page and set the location of the center of the top bore.
2. Click Next to specify more manufacturing details or click Finish to accept FeatureCAM's automatic selections.

You can edit the feature later.