In a message dated 2008/07/20, paleoartifact@......... writes:

> Many thanks for the references.  

Hi Meredith,

> Hmmm....the Ace Hardware triangle looks quite cheaply "available" so too 
> speak for the U.S.A. participants...great!
> Am not sure it could be useful on Chris's Lehman end of boom placement flat 
> surface recommendation, unless its perhaps placement offset to begin
> with thereon? 

       Not sure what you mean?

       Have you checked it's surface finish?

       Check for Sandvik tool tips?

       Let me suggest another source. I am currently using a SS scalpel 
blade, 16 thou thick for the flat plate, glued to the flat turned end of the 12mm 
Al rod arm with Acrylic adhesive. I buy the large 'Skin Graft' blades ~$1 each, 
50 mm x 15 mm, and cut them into four strips with a carbide disk. These are 
hardened and tempered SS with a mirror finish. Use 3/8" to 1/2" OD SS balls. 
These should easily carry the high contact stress. 

       You can also use the 1/4" square tool steel rods for making lathe 
tools.

       Regards,

       Chris Chapman   
In a me=
ssage dated 2008/07/20, paleoartifact@......... writes:



Many thanks for the references.=
  




Hi Meredith,



Hmmm....the Ace Hardware triang=
le looks quite cheaply "available" so too speak for the U.S.A. participants.=
...great!

Am not sure it could be useful on Chris's Lehman end of boom placement flat=20=
surface recommendation, unless its perhaps placement offset to begin

with thereon? 




       Not sure what you mean?



       Have you checked it's surface finish?


       Check for Sandvik tool tips?



       Let me suggest another source. I am cur=
rently using a SS scalpel blade, 16 thou thick for the flat plate, glued to=20=
the flat turned end of the 12mm Al rod arm with Acrylic adhesive. I buy the=20=
large 'Skin Graft' blades ~$1 each, 50 mm x 15 mm, and cut them into four st=
rips with a carbide disk. These are hardened and tempered SS with a mirror f=
inish. Use 3/8" to 1/2" OD SS balls. These should easily carry the high cont=
act stress. 



       You can also use the 1/4" square tool s=
teel rods for making lathe tools.



       Regards,



       Chris Chapman