Meredith,

Your thought that maybe the 1-2-3 blocks are made in China reminded me that
a few weeks ago I was looking for a coil winder on eBay and found one that
looked good. Only $35 and it comes from China. The shipping is costly at
$60, but 3 days later I had it in my hand. Oh that globalization thing!!!

Gary

 

 

 

 

From: psn-l-request@.............. [mailto:psn-l-request@............... On
Behalf Of meredith lamb
Sent: Friday, May 30, 2008 1:10 PM
To: psn-l@..............
Subject: Precision made; but cheapest magnet holding assembly

 

Hi all,

Actually; I think the cheapest metal magnet holding assembly, particularly
for most of us without the tools
to make metal plates; is to just buy a pair of machinist "1-2-3" (1" x 2" x
3") blocks from like, 
Discount machine on E-Bay.  They cost ~$7 for a pair, plus the usual ~$10 >
shipping cost.  Thats 2
blocks for the one price.  The more you buy in one quanity buy session; the
cheaper the total shipping
of course.  Just add the bolts/nuts and/or spacer/standoffs for whatever you
have that would work for
that metal size AND whatever size magnets can fit it also. 

They are 1" thick x 2" height x 3" length in dimension.  They have 23 holes
in them; five tapped holes and 18 untapped
holes.  One can easily use 1/4" bolts in the untapped corner holes.  They
are precision ground hardened tool steel.
The thickness will likely absorb most if not all magnetic effect from the
mounted magnets as sensed on the opposite
side/s....after all its 1" thick. 

As thick as they are, and with using a solid standoff/spacer, you probably
won't need but 2 of such, instead
of 4 bolts/nuts.

If you need more magnet space (for your seismometer masterpiece/s); one can
add more of the same
side by side (~4 x 6, or 6 x 4") with long enough bolts/nuts to go through
the pair side by side. 

The thickness itself makes for a extremely rigid and square overall frame
and one can easily bolt it down
(throught the 1" pre-drilled steel) into your seismometer base plate
vertically or horizontally. 

On Ebay search, just enter "123 block", and you'll see them.  Their is a
variety of sellers over time, but
Discount Machine seems the cheapest at the moment.

They are probably all Tawain or China made; but the quality is much more
than good enough for this
purpose.

Meredith Lamb
















Meredith,

Your thought that maybe the 1-2-3 blocks are made in =
China
reminded me that a few weeks ago I was looking for a coil winder on eBay =
and
found one that looked good. Only $35 and it comes from China. The =
shipping is
costly at $60, but 3 days later I had it in my hand. Oh that =
globalization
thing!!!

Gary

 

 

 

 



From:=

psn-l-request@.............. [mailto:psn-l-request@............... On =
Behalf
Of meredith lamb

Sent: Friday, May 30, 2008 1:10 PM

To: psn-l@..............

Subject: Precision made; but cheapest magnet holding =
assembly



 

Hi all,



Actually; I think the cheapest metal magnet holding assembly, =
particularly for
most of us without the tools

to make metal plates; is to just buy a pair of machinist =
"1-2-3"
(1" x 2" x 3") blocks from like, 

Discount machine on E-Bay.  They cost ~$7 for a pair, plus the =
usual ~$10
> shipping cost.  Thats 2

blocks for the one price.  The more you buy in one quanity buy =
session;
the cheaper the total shipping

of course.  Just add the bolts/nuts and/or spacer/standoffs for =
whatever
you have that would work for

that metal size AND whatever size magnets can fit it also. 



They are 1" thick x 2" height x 3" length in =
dimension. 
They have 23 holes in them; five tapped holes and 18 untapped

holes.  One can easily use 1/4" bolts in the untapped corner
holes.  They are precision ground hardened tool steel.

The thickness will likely absorb most if not all magnetic effect from =
the mounted
magnets as sensed on the opposite

side/s....after all its 1" thick. 



As thick as they are, and with using a solid standoff/spacer, you =
probably
won't need but 2 of such, instead

of 4 bolts/nuts.



If you need more magnet space (for your seismometer masterpiece/s); one =
can add
more of the same

side by side (~4 x 6, or 6 x 4") with long enough bolts/nuts to go =
through
the pair side by side. 



The thickness itself makes for a extremely rigid and square overall =
frame and
one can easily bolt it down

(throught the 1" pre-drilled steel) into your seismometer base =
plate
vertically or horizontally. 



On Ebay search, just enter "123 block", and you'll see =
them. 
Their is a variety of sellers over time, but

Discount Machine seems the cheapest at the moment.



They are probably all Tawain or China made; but the quality is much more =
than
good enough for this

purpose.



Meredith Lamb