3mm

.3mm3D Manufacturing Format

3D Systems · 1990s

Developer
3D Systems
Category
3D & CAD
MIME Type
model/x.3mm
First Released
1990s
Open Format
No
File Signature
N/A
At a Glance
.3mm
3D Manufacturing Format

.3mm files are proprietary 3D model formats used for manufacturing and rapid prototyping, particularly with 3D Systems software.

Reviewed on May 12, 2026
Compression
Binary
Transparency
N/A
Editability
Low
Best for
3D manufacturing data

Key Features

  • Stores detailed 3D geometric data.
  • Supports manufacturing-specific information.
  • Primarily used with 3D Systems software.
  • Suitable for rapid prototyping and 3D printing.

Best For

  • 3D printing workflows with 3D Systems hardware.
  • Storing intricate models for manufacturing.
  • Maintaining design integrity for CAM.

Less Ideal For

  • General 3D model sharing across different software.
  • Web-based 3D viewing.
  • Animation or game development.
  • Archiving that requires wide compatibility.

Common Use Cases

  • Sending designs to 3D printers.
  • Storing CAD models for manufacturing.
  • Collaborating on 3D designs within specific industries.
  • Archiving 3D project data.

How to Open It

  1. Open .3mm files directly within 3D Systems software like 3D Sprint or Geomagic.
  2. Attempt to import the file into other professional 3D modeling or CAD software that might support proprietary formats.
  3. Use conversion tools or services if available to translate .3mm to a more common format like STL or OBJ.

What is a .3mm file?

The .3mm file extension is associated with 3D model data, often generated by CAD or 3D modeling software. It's a proprietary format used primarily for storing intricate 3D designs, which can include complex geometries, surface data, and other manufacturing-specific information. These files are crucial for rapid prototyping, 3D printing, and computer-aided manufacturing (CAM) processes. While not universally supported, it remains relevant in specific industrial workflows where 3D Systems products are employed.

Programs That Open .3mm Files

PlatformProgram
Windows3D SprintFreeOfficial
Geomagic FreeformPaidOfficial

How to Convert .3mm Files

FormatMethod
.STL3D Sprint, Geomagic Freeform
.OBJ3D Sprint, Geomagic Freeform

Common Problems with .3mm Files

⚠️ File cannot be opened in non-3D Systems software.
Try exporting the file to a more common format like STL or OBJ from within the original software or use a specialized converter if available.
⚠️ Corrupted file preventing import.
Re-export or re-download the file. Ensure no transmission errors occurred. Try opening in the original application to check integrity.

Frequently Asked Questions

Is .3mm a widely compatible 3D file format?

No, .3mm is a proprietary format primarily associated with 3D Systems software, making it less compatible than universal formats like STL or OBJ.

Can I convert .3mm files to other formats?

Yes, if you have access to 3D Systems software like 3D Sprint or Geomagic, you can typically export .3mm files to more common formats such as STL or OBJ.

Technical Details

The .3mm format is a binary file structure designed to store detailed geometric and surface information for 3D objects. It can contain precise tessellation data, material properties, and assembly information necessary for additive manufacturing processes. As a proprietary format, its exact specifications are not publicly disclosed, making it challenging to work with outside of its native ecosystem.

Did You Know?

The .3mm format is closely tied to the development of 3D printing technologies by 3D Systems.
It's designed to capture a high degree of manufacturing-specific detail that might be lost in simpler mesh formats.

Security Information

As a proprietary binary format, .3mm files are generally considered safe from common malware threats like script injection. However, always ensure you are downloading files from trusted sources, as with any file type.

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