Activity 4 - Adding an extrusion to your model

Select Extrude Boss

Select the Bottom face. (You might have to rotate the view)

In Sketch mode, select the Circle tool

Draw the outer circle based on the measurements

1. Should be about 20mm in diameter (10mm radius)

2. Location at this point does not matter

Use Smart Dimensions to set the center location at 15mm from sides. Students should use two side to set the center.

Repeat steps 4-5 for the inner circle with the center on the same center of the large circle. It should be 10mm diameter (5mm radius)

Exit Sketch

Verify that the extrusion is going away from the part and set the length as measured (10mm)

Select Extruded Cut

Select the right plane. (You cannot select the face of the cylinder as you can only select planar surfaces)

On the right plane draw a circle 3mm in diameter.

Using Smart Dimension place the center of the circle in the measured position--3mm from bottom of cylinder.

Exit Sketch

Select "through all" or you might need to set the distance to go through the whole part (30mm)