Classic AirGraver
Handpiece Update
The full range of
power is now available in a single handpiece that combines the
capabilities of the 3/8” and the 5/16” bore models.
Improved
and more versatile Classic handpiece
The updated Classic is
the same handpiece as its predecessor, but the new bore is easily
replaceable with a removable sleeve. The Classic will now come standard
with a stainless piston plus an
optional
second tungsten piston. The tungsten piston is heavier than the original
3/8" piston, and provides the same power range as the previous 3/8" bore
handpieces. The stainless piston provides the same power range as
the previous 5/16" bore handpieces.
The new bore sleeve
provides for an extra air pocket in the handpiece. This pocket is ported
to the rear chamber, providing the following improvements:
ü
The piston
changes directions in the rear chamber more gradually, resulting in less
vibration and smoother cutting.
ü
The piston
hesitates for a few microseconds in the front chamber following an impact
stroke, giving the effect of what is known as a "dead blow". This is what
occurs when a hammer hits an anvil and there is no recoil. The impact
inertia is transferred through the anvil to the graver with no bounce. The
result is less vibration, and more energy transferred to the graver.
Combined with the patent pending tungsten piston it provides what can be termed "Tungsten
Dead Blow™".
ü
The idle is
much improved. The idling handpiece can be turned down finer than prior
handpieces, and, with the stainless piston, can be turned down so low that
it is not felt. The tool will idle with less air (or CO2), as well as more
easily maintain an idling state. Small amounts of oil from an older
unfiltered air compressor do not affect the idle as much as on prior
configurations.
ü
Because of
the gradual direction change in the return stroke, and the front stroke
dead blow, the new impacts per minute range are as follows:
§
Stainless
piston speed range 2,400 - 15,000
§
Tungsten
piston speed range 1,500 - 11,000
Retrofitting Classic
handpieces
Owners with existing
Classic handpieces will be able to return them for an upgrade to the new
bore in about one month (approximately mid-September). The cost will be
established at that time.
·
If you have
a 5/16" Classic handpiece, the new tungsten piston will run in your
current bore until you decide to update the handpiece to the removable
dead blow bore. It won't run quite as nicely as it will in the new bore,
but it will work fine and will provide additional power. Tungsten pistons
should be available in about one month as well.
·
If you have
a 3/8" Classic handpiece and you would like it updated, it will need to be
retrofitted with the new bore before it can run the tungsten piston or the
lighter stainless piston.
Current unshipped
orders (including those for Classic handpieces with or without a
PalmControl) will be filled with the Classic dead blow ported bore. |
