Hi Charles and all,

Electronic Goldmine also has some INTRIGUING "unknown metal" bb's (ball
bearings), of .190 & .250" diameters.  #G15310 .190" diameter, 20 for $1.
#G15311 .250" diameter, 15 for $1.  Their description called them a unknown
metal.  If....their photographs are a accurate and undoctored
representation; at least
too me, they "look" alot like ~ polished carbide; mostly black with the
photo flash small round reflection of light on the centered surface.  I
ordered some of the .250"
variety..we'll find out eventually.  The typical common silver gray chrome
steel (majority) and the stainless steel varieties wouldn't normally look
mostly black in a photo;
but all things are possible.  Anyway...it is better to get both the polished
carbide drill/router shanks and (?) ball bearing at one place alot cheaper.

Take care, Meredith

On Fri, Jun 13, 2008 at 5:40 PM, Charles Patton 
wrote:

> Another place to get carbide rods is:
> http://www.goldmine-elec-products.com
> They have individual carbide drill and router bits at $0.99 apiece. They
> also pretty much always have a grab bag of bits.  I just checked and item
> no. G13259 is a bag of 8 or so bits for $2 -- a great deal. I've bought
> these over the years from Goldmine to use in my Dremel tool. They're a great
> bargain.  When the Dremel HS steel burrs and router are used on steel, they
> dull instantly, whereas the carbide bits keep on taking away metal.  They're
> the only bits I use.  I tend to break them faster than I wear them out.
>  With regards to seismo pivots, the shanks are a consistent 1/8" size for
> everything and the router bit were mirror polished in the last batch I
> bought maybe six months ago  so you might not even have to polish them.  So
> far as I can figure they're very good, micro-grain carbide bits that come
> out of the circuit board industry.
>
> Anyway, just another thought.
> Regards,
> Charles Patton
>
>
Hi Charles and all,

Electronic Goldmine also has some INTRIGUING "unknown metal" bb's (ball bearings), of .190 & .250" diameters.  #G15310 .190" diameter, 20 for $1.
#G15311 .250" diameter, 15 for $1.  Their description called them a unknown metal.  If....their photographs are a accurate and undoctored representation; at least

too me, they "look" alot like ~ polished carbide; mostly black with the photo flash small round reflection of light on the centered surface.  I ordered some of the .250"
variety..we'll find out eventually.  The typical common silver gray chrome steel (majority) and the stainless steel varieties wouldn't normally look mostly black in a photo;

but all things are possible.  Anyway...it is better to get both the polished carbide drill/router shanks and (?) ball bearing at one place alot cheaper.

Take care, Meredith 

On Fri, Jun 13, 2008 at 5:40 PM, Charles Patton <charles.r.patton@........> wrote:


Another place to get carbide rods is:

http://www.goldmine-elec-products.com

They have individual carbide drill and router bits at $0.99 apiece. They also pretty much always have a grab bag of bits.  I just checked and item no. G13259 is a bag of 8 or so bits for $2 -- a great deal. I've bought these over the years from Goldmine to use in my Dremel tool. They're a great bargain.  When the Dremel HS steel burrs and router are used on steel, they dull instantly, whereas the carbide bits keep on taking away metal.  They're the only bits I use.  I tend to break them faster than I wear them out.  With regards to seismo pivots, the shanks are a consistent 1/8" size for everything and the router bit were mirror polished in the last batch I bought maybe six months ago  so you might not even have to polish them.  So far as I can figure they're very good, micro-grain carbide bits that come out of the circuit board industry.





Anyway, just another thought.

Regards,

Charles Patton