In order to create a multi-volume split archives from your RAR, you have to use one of the available file compression programs with RAR support and select the archive split option somewhere in the options (the exact location varies depending the program).
Convert WinRAR RAR compressed archive to Compressed file from a multi-volume archive (part 3).
We have found 9 software records in our database eligible for .rar to .003 file format conversion.
Microsoft Windows software - convert rar to 003 on Windows
Popular open source file archiver with a high compression ratio
Convert from rar file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned rar to 003. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
One of the oldest and most popular shareware file archiver and data compression utility
A free open source archive utility
Popular file archiving utility
Apple macOS / Mac OS X software - convert rar to 003 on OS X
A backup and archive utility
Mac version of the popular utility
Linux/Unix software - convert rar to 003 on Linux
Linux version of popular file archiver
A Linux application used as frontend for popular compression tools
A file archive manager