These machines work on the principle
of air pressure which comes from a
external compressor. It is recommended
that the compressor work on air
pressure of 6 atm. These can reach speeds
up to 80,000 rpm. This speed is needed in
order to achieve maximum accuracy when working
with small and delicate details, such as faces or
narror and delicate curves.
These tools come in a wide variety of sizes, shapes
and material, however are relatively hard to find.
There are usually available only in stores which
specialize in sculpting tools, from dentists or
from agents from the manufacturers themselves.
The price for these kind of tools ranges from
$200 - $500 without the heads. There are also
electrical tools available that work in the same
way, but a bit slower (35,000 rpm) and are much cheaper
