none

MATCHING THE MAGNET TO THE LOAD – A CAUTIONARY TALE

26-06-2018
by 
in 

“But the magnet is rated for one tonne,” began the foreman, “and that plate is only 900 kilos.”

Patiently the magnet salesman tried to explain, “yes, but not all ‘one tonnes’ are the same.”

“How can one tonne not be one tonne?” The foreman was becoming exasperated.

“I didn’t say a tonne isn’t a tonne; I said not all one tonnes are the same!”

“Please explain!”

“OK: let me explain with an exaggeration. Suppose you have one tonne of steel in the form of a sheet 14 metres long by 3 metres wide and 3 millimetres thick. Do you suppose your one tonne magnet would lift it?” asked the intrepid salesman.

“Well…no; wouldn’t it droop too much and peel off the magnet?”

“Ah” sighed Magnet-Man, “now you’re onto something. You see, it is one tonne - but it’s not a safe one tonne!”

Back in the real world, Australian Standard AS4991-2004 Lifting Devices requires that “the range of shapes and mass of the load shall be taken into account when selecting a magnet…”

Lifting magnet load ratings are valid only for the manufacturer’s specified steel thickness, profile (round, square etc), type of steel and load overhang or sag.

Don’t take unnecessary risks with your lifting magnets. Check the specs and check the load.

Serpent & Dove’s MaxX permanent magnetic lifters come with a detailed operating manual and also use patented ‘neutral crown’ technology, which concentrates magnetic field at the lifting surface.

Serpent & Dove - Applied Magnetics
02 99717577
www.serpent-dove.com

 

Related news & editorials

  1. 01.11.2019
    01.11.2019
    by      In
    A shopping trolley covers thousands of kilometres in the 10 or so years of its service life, so its castors are subject to significant wear and tear. When carrying out necessary maintenance, the aim should always be to conserve valuable resources and reduce the burden on the environment. So Tente... Read More
  2. 09.09.2019
    09.09.2019
    by      In
    The Mi-Con modular incline conveyor system is billed as the first hygienically designed full-washdown system to be made with multiple standardised components. This novel design from Enmin makes Mi-Con a highly flexible system, allowing customers to select what will best suit their specific product... Read More
  3. 19.08.2019
    19.08.2019
    by      In
    A magnetic resonance imaging (MRI) machine generates high-resolution images using strong electromagnetic fields, measured in Teslas. Machines up to 3T are currently standard in hospitals, but for greater accuracy of detail, machines generating even stronger magnetic fields are increasingly being... Read More
  4. 04.06.2019
    04.06.2019
    by      In
    Belt conveyors are used for the continuous transport of bulk materials, and a wide range of conveyor lengths, capacities and speeds can be utilised. Belt conveyors feature a continuous rubber or plastic belt and tensile elements for strength. The conveyor belt passes over at least two drums, one or... Read More