Copyright 2015 Bakker Magnetics B.V., Son, the Netherlands, BM 2015/10
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1. Dimensions of the object that is to be lifted
- If the object that is to be lifted is too small, the pole
shoes do not completely contact the material and the
lifting magnet has too little material to transfer the
magnetic forces to the workpiece. The workpiece must
be at least large enough to cover the entire contact
surfaces of the magnet.
- If the object is large, it is important to observe whether
the object bends, which may cause the load be pull free
from the magnet. It is important to realize that bending
of the load may create an air gap along the edges of the
contact surface that will result in fewer magnetic lines
passing through the material, therefore reducing the
lifting capacity.
2. Thickness of the material
- For thicker materials, the weight plays and important
role, while for thinner materials the magnetizability is of
primary importance. For more information, see the type
plate attached to the side of the lifting magnet and the
table in this manual.
- If the material is too thin, only a portion of the magnetic
lines of force produced by the lifting magnet pass
through the material, which reduces the capacity of the
magnet. This also results in the danger of multiple plates
being picked up simultaneously. As a general rule, a lifting
magnet has the greatest lifting capacity when the
thickness of the workpiece is greater than the width of
the pole shoes.
3. Composition of the material
- Pure iron is most easily magnetized; any additions to the
composition (to prevent rusting, for instance) have a
negative influence on the magnetizability of the metal.
Stainless steel (e.g. RVS 304) is a material that conducts
the magnetic lines of force just as poorly as air, while the
carbon content of crude iron is so high that its
magnetizability is just 50% of that of steel 37.
- Therefore, whenever you are not sure what kind of
material you are going to lift, always check whether there
is enough lift capacity to pick up the load without danger.
4. The conditions of use
- Maximum temperature of workpiece <200ºC
- If the surface on which the lifting magnet is to be placed
is wet or oily, make sure that the load cannot slide off.
- The lifting surfaces of the magnet and the object must be
clean, flat and undamaged.
- The lifting surface must remain horizontal. Only lift an
object by gripping directly above the centre of gravity.
- Whenever there are problems with use of the lifting
magnet, DO NOT USE THE LIFTING MAGNET; instead,
contact: Bakker Magnetics B.V.
Switching on the lifting magnet
• Turn the handle, from right to left, to a horizontal
position.
• Continue pushing until it moves past the locking pin.
• The lifting magnet is now locked and ready to lift the
load.
Make sure that the handle also remains in the
work position so the handle cannot spring back
Switching off the lifting magnet
• Move the sliding button on the side of the lifting magnet
rearwards, against the spring pressure.
• Turn the handle, from left to right, until it reaches the
stop.
Make sure the workpiece cannot slide off or fall
over once the magnetic force is no longer
present.
MAINTENANCE
The permanent lifting magnets supplied by Bakker
Magnetics B.V. are designed for maintenance-free use.
The load eye, the coupling between the magnet and the
hoist, the pole shoes and the locking mechanism must be
regularly subjected to a thorough inspection.
Periodic inspection
Lifting magnets must be tested by an expert at
least once each year. Furthermore, more frequent
testing must be carried out as required.
Special inspection
Following a damaging or unusual incident that could affect
the lifting capacity, the lifting system must be inspected
and tested by a safety officer.
Disassembly or repair of the lifting magnet can lead to a
change in the magnetic force.
Once the lifting magnet has been disassembled, it must
always be retested by an expert.
Repairs or modifications to the construction of the lifting
magnet may only be performed by persons who have
written authorization and approval from Bakker Magnetics
B.V.
WARRANTY CONDITIONS
The standard warranty as described in the Bakker
Magnetics BV delivery conditions applies.
The warranty is only valid if the magnet is used under
normal circumstances and in accordance with the
instructions described in this manual. Only Bakker
Magnetics B.V., or otherwise an expert trained in the
maintenance of magnetic lifting equipment, is authorised
to perform any repairs. In either case, the written
permission of Bakker Magnetics B.V. is required.
The warranty covers non-wear items for a period of 12
months.
The warranty is void if:
1.Changes have been made to the magnet without written
permission from Bakker Magnetics B.V.
2.The lifting magnet has become unusable as a result of
inexpert use.
Components that may be subject to wear are:
• Pole shoes
• Handle
• Locking assembly
