Creating a Countersunk Hole

A countersunk hole has two diameters, but the transition between the bigger diameter and the smaller diameter is in the form of a tapered cone. In this hole type, you need to define the countersunk diameter, hole diameter, depth of the hole, and the countersunk angle.

For the purpose of the tutorial create a rectangular block of size 100*50*50 and follow the steps given below to create the counterbored hole, as shown in the image below.

1. Start the Hole command and ensure the For screw check box is cleared.
   
   
2. Select the From 2 lines option from the Type drop-down list. Now, click on the face on which the hole is to be placed. You will notice that two edges of the solid are automatically selected for the First Line and Second Line selectors and their respective mini-dialog boxes have been displayed with the default values.
   
   To reset the edge selection, right-click on the respective selector and select the Reset option to select the new edge.
   
   
3. Enter 25 in the 1st Distance mini-dialog box for the First Line selector and 50 in the 2nd Distance mini-dialog box for the Second Line selector.
   
   
4. Next, select the CounterSunk option from the Hole type drop-down list and the Thru all option from the Extension drop-down list, if it is not already selected. The multiple mini-dialog boxes get displayed.
   
   
5. Enter 25(hole diameter) in the Diameter mini-dialog box and 45(countersunk diameter) in the Head diameter mini-dialog box.
   
   
6. To enter the countersunk angle you need to click on the More Options to display the Head angle mini-dialog box. Enter 45 in this mini-dialog box.
   
   
7. Click or to confirm your selections and create the countersunk hole. Click to discard your changes
   
   

Also try to...

• Create a simple blind hole
• Create a simple hole on cylindrical surface
• Create a standard countersunk hole and standard simple threaded hole
• Create a through counterbored hole

Tips and Tricks

• Define a point on a face
• Add a thread to a simple hole or shaft
• Symmetry and Invert Direction handles