Fusion Lesson 2: Create and Resize a Through Hole (Desktop)

Learning outcome

Create one Ø6 mm through hole, then enlarge it to Ø8 mm by editing the same sketch circle while keeping the plate and hole centre unchanged.

Plate 100 × 30 × 5 mm. Local centre 15 mm from the chosen short end and 15 mm from the adjacent long edge. Diameter 6 mm → 8 mm; radius 3 mm → 4 mm.

Before you start

Use Fusion desktop and a separate native working copy of the blank Lesson 1 plate. Check millimetres and 100 × 30 × 5 mm. If you already have a D6 checkpoint, preserve it, skip hole creation and begin with the same-sketch diameter edit in step 5.

Step-by-step guide

1. Locate the circle
On the blank plate’s broad face, create a sketch. Use the lower-left local reference and dimension the circle centre 15 mm from the short end and 15 mm from the adjacent long edge. The centre is halfway across the 30 mm width, not halfway along the 100 mm length.

2. Set diameter 6 mm
Give the circle a diameter constraint of 6 mm. Read the field label: radius 3 mm is equivalent, but radius 6 mm is not. Keep both centre offsets at 15 mm and check that the circle is fully constrained.

3. Cut through the plate
Finish Sketch, select the circular profile and use Extrude with Operation Cut and Extent All. Inspect the direction and flip it into the plate if needed. Confirm an actual opening through both broad faces.

4. Preserve the D6 checkpoint
Save the native design and export a separately named D6 native archive. Keep this checkpoint before enlarging the hole.

5. Edit the same sketch to 8 mm
Open the original hole sketch and change its existing diameter dimension from 6 to 8 mm. Leave both 15 mm offsets unchanged. Finish Sketch and let the existing Cut update. Do not add another circle or another hole.

6. Save and verify your D8 copy
Save a separate native D8 checkpoint. Close and reopen your saved archive, then check the editable dimensions, one solid body and the 100 × 30 × 5 mm envelope. Keep any STEP export separate from the editable F3D history.

Try it yourself

From your D6 checkpoint, repeat the edit to D8 and compare the result. What radius corresponds to Ø8 mm? 4 mm. Is the hole halfway along the plate length? No, its centre is 15 mm from the chosen short end.

Check your result

• D6 is Ø6 / R3; D8 is Ø8 / R4.

• The local centre remains (15,15) mm.

• The outer envelope stays 100 × 30 × 5 mm.

• One solid body remains, with openings on both broad faces.

• You have saved and reopened your own native checkpoints and checked their editable history.

Common mistakes

No hole: confirm Extrude uses Cut, All, and the direction enters the plate.

Hole moved: restore the two 15 mm centre dimensions.

A second circle or cut does not demonstrate editing the existing feature.

A STEP geometry check does not prove that a native F3D archive reopens or recomputes correctly.

File-check status: the D8 STEP geometry passed an independent check. Reopening and recomputing the supplied native Fusion archives is still unverified. Perform the save-and-reopen checks on your own files.