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Permanent Magnet Lifters

Permanent Magnet Lifters

IMA’s permanent magnetic lifters are made in Neodymium magnets with great attraction strength. They are completely autonomous and do not need to be in contact with any source of electrical energy. In order to activate it, you must turn the handle towards the right approximately 100 degrees and introduce it in the security latch, which blocks it during the working period.

Ima’s Permanent magnet lifter’s practical And efficient design allows any type of pieces to be handled, over flat or round surfaces.

They have a safety lever which avoids accidental demagnetising. These Permanent lifters are able to solve satisfactory handling needs of ferrous materials at an exceptionally low cost, without any installation or maintenance cost whatsoever. Besides, thanks to its low weight, it can be incorporated in any type of crane.

  • POWERFUL: Great capacity, even with big air gap.
  • SAFE: A 3 safety rate and a lever with security blocker.
  • LIGHT: Detachment strength from 80 to 115 times its weight.
  • COMFORTABLE: They can be magnetised and demagnetised with one hand.
  • EASY MAINTENANCE: The contact magnetic poles can be rectified frequently..

Standard Measurements List

Standard Measurements List
Code weightKg. A B C D
IMA 250 7 188 80 75 152
IMA 500 16 262 100 95 185
IMA 1000 40 360 140 135 235

Code Ø min.-max. lifting Work str.(1) Work str.(2)
IMA 250 40/350 mm 800 daN 250 100
IMA 500 60/400 mm 1600 daN 500 250
IMA 1000 80/400 mm 3500 daN 1000 500

(1) = Flat Surface; (2) = Curved Surface

Strength Curve

Strength Curve

Influential Factors

Influential Factors

Factores que influyen en la fuerza de atracción de un elevador magnético.

Four basic factors which affect the magnetic pull of a magnetic lifter::

Surface In Contact

If there is a separation between the lifter and the object that is to be lifted, the magnetic flux is obstructed, so the magnetic pull is reduced. These elements which cause the separation (oxydes, paints, oils, or a rough surface) generate an air gap and therefore, a decrease in the strength.

Thickness

The lifter’s magnetic flux needs a minimum thickness to work. When the material which has to be transported doesn’t have a minimum thickness, the attraction strength decreases considerably .

Length And Width

When the length and width of the material that has to be manipulated are increased, the extremes curve and the air gap becomes wider, so there is a space between the lifter and the load. This occurs more often with thinner thickness. When it does happen, one of the possible solutions is the subjection in two points or more.

The Material

Steel low in carbon are good magnetism drivers, however, those with a high percentage of carbon or alloy with another material, loose magnetic properties, so the lifter’s strength is decreased considerably. The hardest steels behave magnetically worse and tend to conserve a residual magnetism.

Loading Material Weight Kg.
Unalloyed Steel 0.1-0.3%C 100%
Unalloyed Steel 0.4-0.5%C 90%
Alloyed steel F-522 80-90%
Fray cast iron 50-60%
F-522 Tempered steel at55-60 HRc 40-50%
Stainless Austenitic Steel -
Brass; Aluminium; Copper 0%

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