PERMANENT AND ELECTRO LIFTING MAGNETS
(brochure pdf)

The use of electro & permanent lifting magnets offers the following advantages: 

• Speed, simplicity and the damage-free transport of workpieces of various shapes and lengths 
• The possibility of precisely positioning the workpiece to be lifted  
• Saving valuable storage space and manpower

RECTANGULAR ELECTRO LIFTING MAGNETS 

These magnets mainly used to lift heavy objects with a thickness of 10 mm of more. Thanks to the deep penetration of the magnetic field, the force is guaranteed, even if there is a slight gap between the magnet and the object.
The correct choice of system depends on the following factors: 

• The structure and function of the crane
• The type of traverse fitted
• The shape and surface of the material to be lifted 

CIRCULAR ELECTRO LIFTING MAGNETS

These magnets a shallower field of penetration, which makes them particularly useful for lifting thin sheets. The main problem encountered when lifting thin sheets is that the magnetic field penetrates too deep, lifting two sheets at a time. This gives rise to what is known as the 'peeling' effect, whereby surface contact is reduced and the sheet comes loose. Many small magnets with a cross arm, including a tip function, prevent several plates being picked up at the same time in the operation. 

BIPOLAR ELECTRO LIFTING MAGNETS

Angled sections and tubes often have only a very small surface area to which a magnet can be attached. Goudsmit therefore developed the bipolar lifting magnet, which exerts the greatest force in the centre of the pole. The bipolar magnets combine minor dimensions with substantial magnetic force, so that they can be precisely positioned and can also effortlessly transport long angled sections. As the two magnets in a bipolar lifting magnet are quite some distance apart, while the workpiece is relatively narrow, the traverse must meet quite stringent requirements. The magnets must always be aligned. They are therefore fixed to the traverse, and can onl move in one direction (parallel to the traverse).

LONGITUDINAL ELECTRO LIFTING MAGNETS

These magnets are used to lift bundles of material with an irregular surface, which complicates lifting operations. Longitudinal magnets, however, have a particularly deep penetration field that makes them unsusceptible to such irregularities. This enable safe and effortless transport of bundles of material. Moreover, two or more of these magnets can be used, depending on the length of the bundles. In the event that people are present in the lifting area, however, extra mechanical slings must be fitted for safety purposes.

Electro lifting magnet with demagnetizing cycle.

Goudsmit has for years produced and delivered electro lifting magnets and systems for the lifting and transport of steel products such as plates and angled sections. With these activities sometimes rest magnetism is left behind, depending upon the material. This rest magnetism can be troublesome in subsequent processes such as welding, compressing or galvanization.  By demagnetizing these products after lifting with a demagnetizing device is one solution.

However due to the form or dimensions (large or awkward) of some products this can be difficult or sometimes even impossible. For this, Goudsmit has fitted out its magnet controls with a demagnetizing cycle. A demagnetizing cycle can be generated with the control after the manipulation of products with an electro lifting magnet. This cycle takes a few seconds. The products are now demagnetized where they are also magnetized; by local demagnetization (not the entire product) you save time and therefore money.