Hi All I am considering a project to manufacture a ring with a
spinning centre band but have absolutely no idea how to do it.
Hi Mark, Soldering can be done, but its tricky. The whole system
could be stucked. When you defenitly want to solder try to stop the
flow of solder with some anti-flow paste. This paste is based on
grafite and stops the solder on the spots were you put it.
Toolsuppliers will sell this stuff.
Or:Solder the first outer ring on the mainbody. Slide the rolling
part on its place. Make a small edge on the inside of the ring that
is put on last and force the metal from the mainbody-innerring over
the small edge. By controling the pressure and checking if the
rolling part still moves, it will work. Method B requires more time
and effort, but is secure.