1. Open the jewelcad software and create a circle with a front view of 17mm and 20.5mm.
2. Select the small circle in the middle to rotate and copy, and press the left and right arrow keys. Turn to the right view and draw a diagonal line with a free curve. Project the copied small circle to the right of the diagonal.
3. Return to the front view and draw a section. You can complete the jewelcad database of 005.