According to Official Guinness Records,
The most rotations of a sword balanced on a dagger in one minute is 14, and was achieved by Ashrita Furman (USA), in Jamaica, New York, USA, on 27 November 2017. Despite having hundreds of records to his name, this is Ashrita's first to involve a dagger.
For a complete list of 2017 records, please visit 2017 Guinness Records in United States.