Technical Features; Availability; Construction; Performance - Pfeifer HIT 125 Traduction Du Manuel D'utilisation Original

4. Technical features

4.1 Availability

HIT 125 / HIT 250 / HIT 500 / HIT 1000 / HIT 1500 /
HIT 2000 / HIT DB 150 / HIT DB 300
In order for the hoister to function in an appropriate and
lasting way, the chosen model must be adequate for the
work needed. The parameters that must be taken into
consideration are:
• Lifting power: it is to be determined by the maximum
weight to be lifted (lifter plus load). It must never
exceed that of the lifting apparatus (crane, etc.).
• Load features: the material must have a smooth and
clean surface, must be of adequate thickness and
must be ferromagnetic. The steel must be of low
carbon content otherwise, if "bonded", appropriate
reductions should be made (see par 3.3).

4.2 Construction

The HIT mechanical structure provides very few
components. Rotor and stator, made of steel and with a
high magnetic permeability degree, are obtained through
mechanical manufacturing of a solid workpiece,
controlled by digital machines. This ensures the desired
uniformity, solidity and quality needed for mass-
produced magnetic lifters.The material used (steel,
aluminum, plastic) is easy to dispose of and to recycle
when dismantling the machine. The magnetic material
used, with high specific energy, has allowed the
manufacturer to highly reduce product weight and size.
In order to ensure high quality of performance, the HIT
lifter is magnetized all in one go after assembly, by
means of the greatest magnetizing apparatus ever made
in Europe.

4.3 Performance

The performances of each
model and the characteris-
tics of the load size limits
are shown on the following
page. The above-men-
tioned technical character-
istics are also indicated on
the tag that is located on
the hoist. All the manufac-
tured models undergo
testing that verifies their
performance. This test is
carried out by placing the
hoist in position and
starting it up on the 80mm
thick mild steel plate with
ground surface of a
dynamometric machine (see photo). For any material
other than soft steel the following reduction factors
must be used to calculate the appropriate lifting
power:
Material
Unalloyed steel 0,1 – 0,3 % C
Unalloyed steel 0,4 – 0,5 % C
Alloy steel F-522
Cast iron
Stainless steels
Brass, aluminium, copper
The thickness of the load also influences the lifting
power of the hoister; for those thicknesses smaller than
the width of the pole there is a reduction in lifting power,
approximately proportional to the ratio of the thickness
(s) of the item to be lifted to the width (L) of the pole.
Lifting power reduction factor = S/L.
The working environment must have the following
characteristics:
• Minimum temperature: – 10 °C
• Maximum temperature: +60 °C
• Max. humidity:
HIT Manual lifters 08/2015 / Subject to technical changes!
Load capacity [%]
100
90
80 – 90
45 – 60
0
0
80 %
HIT 1000
Modell:
Gewicht: 34 kg
PFEIFER
Seil- und Hebetechnik GmbH
S. no.:
Dr.-Karl-Lenz-Straße 66
Jahr: 87700 Memmingen
Telefon 08331-937-112
Internet www.pfeifer.de
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