Clear sky
1 °C
Germantown, Maryland
Clear sky

Tue Mar 19 2019
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. 18.03.2019
    18.03.2019
    by      In
    Schmalz has developed a novel gripper designed specifically for safer human-robot collaboration. The FXCB cobot gripper is an ideal fit for end-of-line packaging and pick-and-place applications.
    The gripper features a flexible-foam gripping surface that allows it to safely handle cardboard boxes... Read More
  2. 13.03.2019
    13.03.2019
    by      In
    Available now from Compressed Air Australia, Exair’s new 64 and 76mm Line Vacs are powerful inline conveyors made to transport high volumes of material through ordinary hose or tube.
    Designed for areas like food and pharmaceutical processing, the units are made from 316 stainless steel, providing... Read More
  3. 12.03.2019
    12.03.2019
    by      In
    Jungheinrich unveiled a new generation of its successful EKS medium/high level order pickers at LogiMAT 2019. The result of numerous developments, the EKS 412s is the fastest truck with the largest order picking height for use in high-bay warehouses, and achieves optimum performance with high... Read More
  4. 31.01.2019
    31.01.2019
    by      In
    Dematic automated guided vehicles (AGVs) will be installed in the GTS Freight Group’s new warehouse in Mildura, northern Victoria, in mid-2019.
    GTS is a privately owned full-service logistics company based in Mildura, which operates a nation-wide fleet of over 150 prime movers and 450 trailers. Due... Read More