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Showing a Round Hole on an Angled Surface

If you draw holes or cylindrical shapes on angled surfaces you'll appreciate the Rotation option of the Ellipse command. This video illustrates how to use the Ellipse command and the Rotation option to represent a hole through an angled surface of a part.

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Transcript of this video

This video will demonstrate how to represent a round hole on an angled surface using the Ellipse command.

First, several tools are used to properly locate the ellipse. Since the hole is on a surface angled at 45° set Polar Tracking to 45° and make sure the Track using all polar angles setting is turned on. The Object Snaps are set to Midpoint and Intersection. Object Snap, Polar Tracking, and Object Snap Tracking are all turned on.

Using the Center option of the Ellipse command, locate the center of the Ellipse in line with the Intersection of the center line and the angled surface containing the hole and the Midpoint any of the lines of the front view. To specify the distance to the end of the axis, move your cursor directly to the right of the center and type 0.75 (the radius of the hole). The Rotation option of the Ellipse command determines the proper minor axis length for an Ellipse representing a 1.50 diameter circle on a 45° surface.

Now make a copy of the Ellipse, again using Object Snap Tracking to determine the distance for the copy. Using the first Ellipse as a cutting edge, trim the second Ellipse to show the material thickness.

Next set the current layer to Center, add Quadrant to the list of Object Snaps and draw two lines, each from Quadrant to Quadrant.

The Center lines should extend beyond the edges of the ellipse. Select both ellipses using an implied crossing selection and choose the grip at the midpoints. Next, right-click and choose Scale from the menu. Type a scale factor of 1.5 and press ENTER, then ESC.

To adjust the linetype scale of the horizontal center line, select it, right-click and choose Properties, then change the linetype scale property of the just selected line to 1.5. Press ENTER, move your cursor and press ESC.