I found this fascinating: http://www.supermagnete.de/eng/project8
Roberto from Italy repaired his dented brass instrument on his own with the help of super magnets. To do so, he used our largest magnetic hook FTN-63 as well as a large disc magnet. The hook provided him with a reasonable grip which the disc alone cannot offer. Here you see the dented Euphonium.
http://javascript<b></b>:toggleImageSize('68',262,393,524,786,524);Then he let a steel ball, somewhat smaller than the dent, roll into the instrument. The steel ball naturally "attached itself" through the instrument to the magnet. He then moved the magnet back and forth over the brass where the instrument was dented, and with time the steel ball pushed the dent outwards.
To ensure that the instrument would not be scratched, he placed a drumskin between the instrument and the magnet and applied some oil on both the drumskin and the instrument.
Read/See more...
Roberto from Italy repaired his dented brass instrument on his own with the help of super magnets. To do so, he used our largest magnetic hook FTN-63 as well as a large disc magnet. The hook provided him with a reasonable grip which the disc alone cannot offer. Here you see the dented Euphonium.
http://javascript<b></b>:toggleImageSize('68',262,393,524,786,524);Then he let a steel ball, somewhat smaller than the dent, roll into the instrument. The steel ball naturally "attached itself" through the instrument to the magnet. He then moved the magnet back and forth over the brass where the instrument was dented, and with time the steel ball pushed the dent outwards.
To ensure that the instrument would not be scratched, he placed a drumskin between the instrument and the magnet and applied some oil on both the drumskin and the instrument.
Read/See more...