In a message dated 09/04/2009, rog@.......... writes:

Has  anyone used an Neodymium sphere or pair of sphere magnets as a Lehman  
pivot?
Rob



Hi Rob,
 
    No, but I would not expect it to last long, or work  well. The magnets 
are hard plated with Nickel, which is not a particularly hard  metal. 
 
    Stainless steel ball bearings work well as do hard  chrome steel 
scalpel blades for a counterface. You might try a NdFeB cube magnet  under a 
scalpel blade, but I would expect the magnetic hysteresis at the contact  point 
to give 'sticky' results.
 
    Regards,
 
    Chris Chapman






In a message dated 09/04/2009, rog@.......... writes:
Has 
  anyone used an Neodymium sphere or pair of sphere magnets as a Lehman 
  pivot?
Rob


Hi Rob,
 
    No, but I would not expect it to last long,=
 or work 
well. The magnets are hard plated with Nickel, which is not a particularly=
 hard 
metal. 
 
    Stainless steel ball bearings work well as do=
 hard 
chrome steel scalpel blades for a counterface. You might try a NdFeB cube=
 magnet 
under a scalpel blade, but I would expect the magnetic hysteresis at the=
 contact 
point to give 'sticky' results.
 
    Regards,
 
    Chris Chapman