Convert X_T to CAD

A supplier or older CAD system may deliver a Parasolid .x_t model that the receiving application cannot open. Converting it to STEP provides a widely supported exchange file for editing, manufacturing, review, or archiving.

What the X_T format is

.x_t is the text-based Parasolid format developed by Siemens Digital Industries Software. It stores precise boundary-representation geometry, including solids, surfaces, curves, topology, and, when present, assembly structure. The corresponding binary format normally uses .x_b.

Parasolid files are produced by Siemens NX, Solid Edge, SolidWorks, and other engineering systems that use the Parasolid geometric kernel. They are commonly exchanged when a supplier, customer, or separate CAD application needs a mechanical part or assembly without the original native project file.

What CAD means here

CAD is not one standardized file format or extension. The required output depends on the receiving application. Common targets include STEP (.step or .stp), IGES (.igs or .iges), ACIS (.sat), Parasolid binary (.x_b), and proprietary native CAD formats.

STEP is usually the safest target when the recipient has not specified a format. It transfers precise solid and surface geometry and is supported by most mechanical CAD systems. AP242 is a current general-purpose choice when the recipient supports it; AP214 is also common for product data and color information. IGES is mainly appropriate when explicitly requested, particularly for older surface or wireframe workflows, because it may transfer separate surfaces instead of a watertight solid.

How to convert the file

CAD Exchanger Desktop is a practical independent translator when the original CAD program is unavailable.

1. Open the .x_t file with File → Open.
2. Check the model tree, displayed units, body count, part names, and assembly hierarchy against the source.
3. Choose File → Export, select STEP, and choose AP242 or AP214 if supported by the destination.
4. Enable assembly or product-structure export when converting an assembly. Preserve names and colors when the receiving workflow uses them.
5. Save as model.step or model.stp, then reopen the result in the target CAD system or a CAD viewer.

TransMagic is another established desktop translator for Parasolid and other mechanical CAD formats. Confirm its current import and export support for the specific Parasolid version and target format before purchasing.

A Parasolid-based CAD application can also perform the conversion. In Siemens NX, Solid Edge, or SolidWorks, use the application’s import command, run its geometry-check or healing tool if necessary, and use File → Save As or File → Export to create STEP, IGES, ACIS, or the recipient’s native format. Set units explicitly and include assembly structure when exporting more than one part.

Online conversion

CAD Exchanger Cloud can convert supported Parasolid uploads to exchange formats through a browser, avoiding desktop installation. Upload only files allowed by your organization’s security policy because the geometry is transferred to a third-party service. Check the service’s current supported-format list and download the converted file; an online viewer may display an X_T model without offering a complete export.

Quality and compatibility limits

A conversion normally transfers boundary geometry, not the original parametric feature history. Sketches, constraints, design-tree operations, equations, and editable feature relationships are generally lost, even when the resulting solid is accurate.

After conversion, verify units, solid status, part and body count, assembly placement, face colors, hole diameters, mating interfaces, and critical dimensions. Kernel tolerance differences can create gaps, failed sewing, invalid faces, or non-manifold edges, particularly in thin walls, small features, and imported surface models. Healing may repair these errors but can change edge tolerances, so compare critical dimensions with the source.

Use STEP instead of STL when the recipient needs editable CAD geometry. STL tessellates the model into triangles and loses exact analytic surfaces, solid topology, assembly relationships, and most engineering metadata.

If the destination requests a file ending in .cad, obtain the receiving application and version first. The .cad extension is used by different proprietary products, and renaming .step or .x_t to .cad does not convert the file.