PSN-L Email List Message
Subject: Re: Seismograph
From: Christopher Chapman chrisatupw@.......
Date: Fri, 26 Nov 2010 18:48:45 -0500
Re: Seismograph
In place of a ball bearing, has anyone ever tried using a polished Acorn=
nut for the pivot on the Lehman boom. It seems it would be easier to moun=
t than a BB. Ed.
?
Hi Ed,
?
??? Acorn nuts are not hardened, nor are the surfaces precision machined.=
They would be unlikely to give a long lasting satisfactory performance.
?
??? SS bearings are hardened and have a?precision machined and polished su=
rface. They are known to give excellent performance.?
?
??? Regards,
?
??? Chris Chapman
=3D
Re: Seismograph
In place of a ball bearing, has anyon=
e ever tried using a polished Acorn nut for the pivot on the Lehman boom.=
It seems it would be easier to mount than a BB. Ed.
Hi Ed,
=
Acorn nuts are not hardened, nor are the surfaces precision machined. The=
y would be unlikely to give a long lasting satisfactory performance.
=
SS bearings are hardened and have a precision machined and polished=
surface. They are known to give excellent performance.
=
Regards,
=
Chris Chapman
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