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6
Ixtur LI-120
Air Gap and Surface Quality
Any material that separates the magnet's lifting surface from the surface of the load reduces the total magnetic
holding force. Reduction can also be caused by non-magnetic materials or by materials with weak magnetic
qualities, such as, zinc or paint or similar coating, rust, frost or air. This manual uses air as an example.
An air gap may also increase due to rust on the load surface, foreign particles such as metal chips from
welding, corrosion, and convexity or concaveness of the surface.
Before magnet attachment, both the magnet's lifting surface and the load material surface must
be cleaned of foreign materials to minimize the air gap that reduce holding force
Due to residual magnetism, the magnet's lifting surface may contain magnetic particles or pieces
which reduce the holding force
The load material surface may bend and become convex during the lift, which produces an air
gap and reduces holding force. Especially thin materials may cause this effect