Lifting magnets will achieve different hold forces depending on the thickness of the steel it is in contact with.
Some magnets are geared towards lifting thin material (Active shunting) and some thicker material (Passive Shunting).
Let’s look at how the two compare at the midrange thicknesses we commonly handle in Australia:
The active shunting Magnets are more likely to lift the number on the side of the magnet as they waste less flux due to the more efficient circuit. This reduces the risk of operator error.