Convert IPT to IGES

A receiving CAD, CAM, inspection, CNC, or legacy engineering system may require IGES instead of an Autodesk Inventor part file. Exporting the model provides a neutral geometry file for exchange, but it does not preserve Inventor’s editable feature history.

What the IPT format is

IPT is Autodesk Inventor’s native part-document format. It can store one part’s solid or surface geometry, feature history, sketches, parameters, constraints, bodies, and application-specific appearance or material data.

Inventor creates IPT files for individual parts; assemblies normally use .iam, while drawings use .idw or .dwg. An IPT can contain multiple solid bodies, but it is not an assembly file. To convert an assembly, open the IAM file and export the required components or a combined representation separately.

What the IGES format is

IGES (Initial Graphics Exchange Specification) is a vendor-neutral CAD exchange format commonly saved as .igs or .iges. It can carry wireframe entities, curves, trimmed surfaces, and, depending on the exporter and importer, boundary-representation solids.

IGES remains useful with older CAD, CAM, CNC, inspection, and visualization software that lacks reliable support for newer exchange formats. It transfers geometry, not Inventor’s parametric feature tree, editable sketches, constraints, iFeatures, assembly relationships, or most application-specific metadata.

Convert with Autodesk Inventor

1. Open the .ipt file in Autodesk Inventor and allow the model to regenerate. Resolve failed features or missing references before exporting.
2. Check the active model state, visible bodies, and units. Remove or suppress geometry only when the recipient does not need it; otherwise export the complete required part.
3. Choose File → Export → CAD Format. In some Inventor releases, choose File → Save As → Save Copy As instead.
4. Set the file type to IGES Files (*.igs; *.iges), choose a destination, and open the available IGES export options.
5. Select the required geometry representation, such as a solid or trimmed-surface export, and confirm the output units. Save the file.
6. Reopen the exported file in Inventor or the recipient’s CAD viewer. Check for open edges, missing faces, incorrect seams, unexpected bodies, and key dimensions.

Inventor is generally the safest choice because it reads the native IPT data and regenerates the source body before translation. For multi-body parts, confirm whether the recipient wants separate bodies or a single combined model.

Use another converter

CAD Exchanger Desktop or CAD Exchanger Cloud can be alternatives when Inventor is unavailable. Verify the product’s current support matrix for the specific IPT version and IGES output before relying on it; format support and export options can vary by release or subscription.

For a cloud conversion, upload the IPT, select IGES as the output, set units or geometry options if offered, convert, and download the result. Do not upload confidential, export-controlled, or proprietary designs without approval. A desktop translator keeps the source file and conversion process under local control.

Quality and compatibility limits

• IGES is a geometry exchange file, not an editable Inventor document. The recipient will usually need to edit imported faces or rebuild features.
• Confirm units in both applications. A unit mismatch can make a model 25.4 times too large or too small when inches and millimeters are confused.
• A nominal solid export may be imported as stitched boundary surfaces. If the receiving application reports an open shell, use its sew, stitch, heal, or make-solid operation, then verify that the result is closed.
• Feature names, design history, sketches, constraints, appearances, materials, assembly relationships, and Inventor-specific metadata can be lost.
• Curved faces, small holes, thin walls, and closely adjacent surfaces are common locations for tolerance and stitching errors. Compare critical dimensions and inspect section views after import.
• If the receiving system accepts it, STEP files such as .stp or .step often provide a better modern solid exchange than IGES. Use IGES when the downstream system specifically requires it.