4. LOAD LENGTH OR WIDTH
As the length or width of a load increases, it will cease to remain flat when lifted as the edges
will begin to droop. This drooping or sagging of the load can create an air gap between the
load and the magnet, especially at the ends of the magnet. This is referred to as peel. If this
occurs, the lifting capacity of the magnet is greatly reduced.
For plate lifting, where drooping often occurs, rectangular shaped magnets must be positioned
so that the length of the magnet is parallel to the width of the load.
5. POSITION OF MAGNET'S LIFTING SURFACE
As the slope of the magnet's lifting surface changes from horizontal to vertical, the lifting
capacity of the magnet decreases. When the magnet's lifting surfaces are vertical, the lifting
capacity of the magnet is minimum and dependent upon the coefficient of friction between the
magnet's lifting surface and the load.
6. PORTION OF MAGNET SURFACE IN CONTACT WITH LOAD
The full surface of the magnet must contact the load if the magnet is to achieve its rated lift
capacity.
7. LOAD TEMPERATURE
The temperature of the load can cause damage to the magnet and if high enough, can even
change the magnetic characteristics of the load. For Standard Lift Magnets, Walker should be
consulted if the load or air temperature exceeds 110
°
F (43
°
C).
O.S. Walker Inc., Battery Powered Magnets
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