MAGLOGIX MagnaHoist MXL-440R Manual De Instrucciones página 11

Material thickness
The magnetic flux (north to south field lines) of the permanent magnet requires a minimum material thickness to
flow completely into and across the material below the magnetic contact area. Beyond this minimum material
thickness, the maximum holding force continues to decrease (see Detailed Performance Data, Table 1 & 2).
Conventional (singular) switchable
permanent magnet
Conventional switchable permanent magnets have a deep penetrating singular (north to south) magnetic field. The
way conventional switchable permanent magnets hold onto steel would be similar to stapling paper together using
one large heavy staple in the center of the page, and not bending the legs together.
The compact multi-field magnetic array of the Maglogix
stapling paper together in a circular pattern with many small lightweight staples close together, and bending the
legs together to achieve an even greater holding force. An infinate number of small magnetic field arrays are the
principle behind the Maglogix
Surface quality
The maximum holding force of a permanent magnet can be achieved in case of a closed magnetic circuit in which
the magnetic field lines can connect up freely between the poles, thus creating a high magnetic flux. In contrast to
iron, for example, air has very high resistance to magnetic flux. If an "air gap" (i.e. a space) is formed between the
workpiece and the magnet contact area, the holding force will be reduced. In the same way, paint, rust, scale,
surface coatings, grease or similar substances all constitute a space between the workpiece and magnetic contact
area. Furthermore, an increase in surface roughness or unevenness has an adverse effect on the magnetic holding
force. Reference values for your MXL-440R can also be found in Table 1 & 2.
Load dimensions
When working with large workpieces such as girders or plates, the load can partly become deformed during the lift.
A large steel plate would bend downwards at the outer edges and create a curved surface which no longer has full
contact with the magnetic contact area. The resulting air gap reduces the maximum load-bearing capacity of the
Lifting Magnet. Hollow objects or those smaller than the magnetic contact area of the magnet will also result in less
holding power being available.
Load alignment
During load movement care must be taken that the Lifting Magnet stays located at the workpiece center of gravity
and that the Lifting Magnet's magnetic contact area respectively, stays balanced horizontally. In this scenario, the
magnetic force of the Lifting Magnet's magnetic contact area and workpiece stay perpendicular to gravity, thus
providing the maximum rated load-bearing capacity, resulting in a standard 3:1 safety factor.
Danger: if by accident the workpiece and Lifting Magnet shift or change from a horizontal to a vertical
position. The Lifting Magnet is now transitioning into shear mode and the workpiece can slip away to the
edge or even detach. In shear mode, the load-bearing capacity decreases dependent upon the coefficient
of friction between the two materials.
Maximum operating temperature
The high-power permanent magnets installed in the magnetic clamp will maintain their load-bearing capacity up to
a maximum operating temperature of 176°F (80°C). Exceeding this maximum operational temperature may cause
irreversible damage.
®
patented switchable magnetic clamps.
®
Maglogix (multi-field) switchable
permanent magnet
®
switchable permanent magnets would be similar to
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