Drill bits have uniquely complex geometry, and even small differences in their shape affect their performance. So it’s important to capture the unmachined freeform geometry exactly as it is, while making sure that all the machined features are modeled as true prismatic shapes.

You can model a drill bit in Rapidform XOR easily. After scanning, import the mesh and follow these steps:

1. Run region segmentation to define the different feature regions on the part
2. Run the alignment wizard to align the scan to a global coordinate system.
3. Use mesh fit surfacing to fit NURBS patches onto the unmachined/freeform features. Make sure that the surfaces extend out far enough to be trimmed back by the revolution (step 5)
4. Extract the center axis of the bit by making a reference vector using “Find revolve axis”. XOR uses all the available data from the revolution feature(s) on the bit to calculate the axis
5. Create a sketch around the center axis, and then revolve to make a solid
6. Trim & merge the revolved solid with the mesh fit surfaces

Accuracy Check (Acceptable tolerance ±0.05mm)