Use a Drill operation to create the four countersunk holes.
On the ribbon, click CAM tabDrilling panel Drill.
Tool tab
Click to open the Tool Library.
From the CAM Mania Tutorial library, select #60 - Ø1/2" 90° countersink.
Click to close the Tool Library dialog.
Geometry tab
Click the Geometry tab. Ensure that Selected faces is selected from the Hole mode: drop-down menu and that the Hole faces selection button is active.
Select the conical face of one of the countersunk holes.
Enable the Select same diameter check box. The other three countersinks are automatically selected.
Important: If Select same diameter is disabled (grayed out), you have most likely selected the edge of the cylinder instead of the face. Be sure to select cylindrical faces to use this feature.
Cycle tab
Click the Cycle tab.
Select Drilling - rapid out from the Cycle type: drop-down menu.
Start the Calculation
Click the button, or right-click in the graphics window and select OK from the marking menu, to exit Drill and create the toolpath.