How to cut sorbothane?

11-15-06: Jgiacalo
First, I doubt that what you purchased is exactly the same material as
Herbie's Big Fat Black Dots. I have them and they are somewhat stiffer
than most sorbothane I've felt.

Thank you for the leather tool suggestion. It appears to be
similar in principle to the arch punch suggested by Stilljd. Do you think
the manufacturer of sorbothane makes a specific product
for a small boutique audio tweak company? I'll bet you any amount of
money McMaster-Carr stocks precisely the same sorbothane used by
Herbie. I may not have purchased the same durometer rating
sorbothane used in the Big Black Dots, but McMaster-Carr carries about
all the various sorbothane made as far as I can tell...durometer rating
(40, 50, 60, 70...), elasticity rating, etc., and in a wide variety of
thicknesses. Herbie has done all the work though, so he's entitled to
charge whatever he likes for his product. Most knuckleheads wouldn't
choose to go through the research, cutting etc. that I've done to make
their own and save $50. I don't blame them for buying Herbie's product
or the discs sold for audio use on E-Bay

Thanks Stilljd and Ronnjay for your suggestions. The arch punch is
EXACTLY the right tool, but at $39 for a 1 1/2" version
purchasing one negates the advantage of buying the raw material versus
the pre-fashioned discs offered on E-Bay and by Herbie's.

I am not sure what diameter you are looking for. How about a bulb (tulips, etc.) planter. They even come with a nice handle.

comprimise...

http://www.kabusa.com/frameset.htm?/ACCESSS.HTM

$29 for 4 sorbothane domes, 3 different densitiy options.

G_m_c, I've already made my purchase of sorbothane.

Tvad, fwiw, I don`t think that Herbies stuff is sorbothane. I pulled this from his web site.

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What it is: Herbie's isolation materials are proprietary silicone-based vinyl elastomers with varying compliance and firmness qualities. The materials will absorb vibration with very little pressure applied. As weight load increases, the materials become increasingly resistant to compression. Unlike Sorbothane, Vibrapods, Isonodes, Clouds, and other squishy isolation materials, these compliant, non-vulcanized compounds are not dependent on a precise weight load to be most effective. They are equally effective under a wide range of weight and have no inherent resonance or "coloration." Invented and formulated solely for audio and video applications, these proprietary materials are unsurpassed in their ability to absorb microphonic vibrations and reduce audio distortion. Materials are smudge-free and residue-free, with excellent dielectric (insulating) properties.

Our new SuperSonic fluorocarbons are proprietary composites developed for absolute sonic neutrality and microphonics-absorbing ability.