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Form
Cranes
Cormach
Form Cranes...
were first introduced into North
America in the early 1980's, and with an increased customer appreciation
of the varied applications for articulating cranes, coupled with the field-proven
design and reliability of Cormach cranes, our market share and reputation
has expanded and strengthened.
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Cormach cranes are
designed right. - All Cormach
cranes feature the same design from the boom hinge downwards-
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Cormach design calls
for strength dissipation, not stress concentration.
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The cantilever profile
of the twin columns dissipates the lifting stresses and shock
loads evenly into the big rotation bearing and through that
into the outriggers, and the ground, with the chassis acting
as a counterweight.
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The box cross section
of the twin columns is calculated to handle tensional stresses
created by abusive rotation, and to absorb the shock of sudden
stops, starts and reversals.
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All single column
cranes have an unavoidable point of high stress at the upper
bushing. This is overcome by the use of very thick steel walls
in the turret. This inevitably has excessive torsion rigidity
that transmits all the rotational shocks of poor handling straight
into the pinion. If you make a truck chassis rigid, and prevent
it flexing to absorb shock, you know that its life will be substantially
reduced. The same is true of crane design.
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Most articulating
crane manufacturers for their big, high capacity units, use
the Cormach system with rotation bearing and turret. Only Cormach
uses this system on their entire product line. From this fundamentally
sound design arise many advantages:
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Symmetry about
the centerline is achieved. No Cormach crane has off-set columns
or booms. This results in evenly distributed loads in all pins,
bearings and bushes.
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Low center of gravity
- Cormach cranes have their heavy components down near chassis
level to give a low center of gravity.
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Continuous rotation
- is standard from 205,000 ft/lbs up, and optional on all smaller
models. This is not possible with rack and pinion rotation.
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Two cylinders
- one on either side - are used to raise the main boom for optimum
stress dissipation. Either could support the load in an emergency.
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Crane weight - Due
to the design, Cormach cranes are usually substantially lighter
than competitive models.
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Mounting space -
Cormach design takes up less chassis frame space than competitive
models.
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Safety inspections
- are easier - stressed parts are all open to view.
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Maintenance - is
much easier with the "Big Crane" design
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All parts are visible
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All wear is measurable
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All leaks are immediately
traceable
This basic advantage
of CORMACH cranes will become apparent as you become familiar
with the quality of design and workmanship which is built into
each and every crane that Cormach produces.
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MODEL
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REACH
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CAPACITY
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25500 E6
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50'
10"
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2070
lbs
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38000 E8
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61'
6"
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2030
lbs
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51800 E6 F133
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73'
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2290
lbs
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125000
E9 F186
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102'
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2690
lbs
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Product
Line 
