Chris,

Thank you.

Is a scalpel blade against a steel ball bearing the current best 
consensus for a Lehman pivot?

rob

ChrisAtUpw@....... wrote:
> 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
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com
> Version: 8.0.176 / Virus Database: 270.11.48/2048 - Release Date: 4/8/2009 7:02 PM
>
>   


__________________________________________________________

Public Seismic Network Mailing List (PSN-L)