3ds to jt conversion is typically sought by users that need to export 3D content from 3ds to JT Open CAD format, typical for Siemens software.
Several 3D modeling / CAD converters advertise this conversion as possible, so these might be your best option. Especially if you do not have access to 3ds Max, as the only alternative is to use one of the common exchange formats, like FBX for a middle step conversion to transfer the designs.
Updated: October 25, 2023