The HALL XTRA Faceting Machine.
Designed by Laurie Hall,
manufactured by UNAMIT Cairns.
Hall
Xtra faceting machine business for sale
Hall "XTRA" faceting machine
with accessories: Fifteen precision centreless ground brass dops,
half round and round master dop, 45 degree angle adapter,
high accuracy elliptical groove
transfer block, 96 tooth, 80 tooth and 64 tooth index
wheels and Allen key set.
The Hall XTRA is the result of over forty years of
continuous design and refinement which
results in a faceting machine of unmatched
performance and accuracy. The XTRA is now
manufactured by Peter Tolputt of Unamit
Cairns, who has been associated with Hall faceting
machines since 1976. The XTRA is Laurie
Hall's latest machine design and incorporates
new features not found in any previous
Hall machine to date. Accepts 6 inch lap plates only.
Features:
- Facet angles can be set to 100ths of a degree.
- Three most commonly used index
wheels: 96, 80 and 64 are included, not optional extras.
- High precision elliptical groove
transfer block.
- Easily runs off generators and any
type of mains inverter power.
- Energy
efficient, only
uses 50 Watts power maximum: the design
makes 12 Volt battery/inverter operation practical.
- Baldor USA made permanent magnet high
torque DC motor.
- Every
machine built personally in Cairns, Australia: all casting,
machining, electronics, assembly, checking and setting, packing.
- Compact, rigid, accurate,
precision built, simple and easy to operate.
Technical:
- The index wheel pin engages the
tooth in the index wheel that is in direct relation to the facet
being cut, not opposite it.
- Fine angle display of 100ths of a
degree and depth of cut indication with Mitutoyo dial gauge.
- Precision aligned mast and head
assembly with dual, preloaded quill bearing.
- Precision NSK brand preloaded,
shielded ball bearings for maximum accuracy and long life.
- Cast aluminium base and swing-arm
for low mechanical distortion and resonance free operation, i.e. does not ring like a bell or resonate during
operation or contain the high internal distortion stresses of
rolled plate aluminium.
- Centreless precision ground brass
spindle shaft enables tighter fit in the bearings than stainless
steel without seizure or any hydraulic press
distortion, giving greater machine accuracy and longer bearing life.
- New technology high efficiency
electronic motor drive for cooler motor running and jerk free lower
speeds for heat sensitive gemstone
polishing and flatter meet points.
- Wide
tolerance of voltage 200-320 Volts AC or DC and
frequency of DC-400 Hertz.
- Neoprene, seamless, vibration
free motor drive belt.
General:
Hall faceting
machines are built to the best of our ability with the equipment at
our disposal. Standard
engineering
measuring instruments; vernier callipers, micrometers, dial
indicators, engineers protractors
and straight edges,
etc. are all used to check all operations. Some operations are
dependent on the
accuracy of the
machine tools used in their manufacture. These tools are made by world
recognised manufacturers
and meet International
Limits of Accuracy. Other
measurements are dependent on human interpretation. As one
champion
facetor said: “The skill of the facetor takes over where the accuracy
of the machine leaves off, however,
Hall
machines make this easy.
Guarantee:
We will at any time,
correct any fault detrimental to the operation of the machine for
which we are responsible.
Closeup of faceting head showing the dial gauge which allows
facet angle setting to 0.01 degrees using the micro adjuster.
The dial gauge also indicates depth of cut and reads zero when
the facet is cut to the hard stop.
Supplied dops with every XTRA
80 and 64 index wheels (96 not shown)
Precision transfer block
New "Xtra Plus" faceting machine
Manuals
for Hall machines
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Us
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HALL
FACETING MACHINES
The choice of Champions.
Winners of National and International Faceting Competitions
The preferred machines on the Central Queensland Gemfields