3
Safety Information
OPERATION
Before any use or operation, you should clean the surface
of the workpiece being lifted and ensure that the bottom of
the lifting magnet is free of any dirt or debris; such as rust
and or metallic burr.
Place the lifter on the surface of the workpiece and make
sure the centreline of the lifter and the workpiece overlap
clearly. Then turn the handle from OFF to ON until the inner
slide key of handle passes the lifter’s stop pin.
Make sure the handle’s inner slide key is automatically
locked by the stop pin. Only after all these instructions
have been followed should the operator begin to use the
lifting magnet.
During any lifting and handling operation, overloading is
totally prohibited. It is also forbidden to pass underneath
or stand under the workpiece that is being held by the
magnetic lifter. The temperature of the workpiece and the
surrounding area should be between no less than -40°C or
no more than +80°C. It is unsafe to use the lifter in an area
where heavy vibration could occur or in an area that could
cause an impact to the lifter during the course of use or
during a lifting operation.
When lifting cylindrical workpieces, ensure the workpiece
is in contact with the lifter’s V slot lines. The capacity for
cylindrical iron/steel is generally only 30% of the unit’s
rated capacity for standard flat plate e.g. plate capacity
W.L.L. 100 KGS would equate to cylindrical capacity W.L.L.
30 KGS.
After every lifting or handling operation is finished, press
down the button of the handle to disengage the slide key
from the stop pin and accordingly turn the handle from
ON to OFF until it is released. At this point the lifter is in a
neutral condition and it can be safely taken away from the
workpiece that was being lifted.
MAIN FACTORS FOR SAFE USE
THE THICKNESS AND SURFACE OF THE WORKPIECE IS
CRITICAL
Before EACH AND EVERY operation, it is necessary to
find out its effective capacity of the lifter depending
on the thickness of the item being lifted. According to
STEEL THICKNESS percentage curve on the chart on this
instruction guide, the user should determine the capacity
and assess the lift requirement. Also care should be
taken to make a clear estimate to determine the effective
capacity of the lifter depending on the workpiece surface
condition according to the AIR GAP percentage curve
detailed in the chart on this instruction guide.
For assistance with the surface quality, if the roughness
(Ra) is less than 6.3um, the effective lifting capacity can be
as the maximum 100%. However, if the surface roughness
(Ra) is above 6.3um or even worse, the air gap between
the lifter and workpiece should be closely calculated and
estimated to affect the lifting capacity.
To find out the effective capacity of this AIR GAP please
closely study the AIR GAP curve percentage chart on this
instruction guide. Combining both factors then calculate
the actual lifting capacity on this condition. The curve is
also printed on both sides of each magnetic lifter.
CRITICAL SAFETY CONSIDERATIONS FOR
LIFTING ANY WORKPIECE
Taking the magnetic lifter’s capacity in hand, it should
be considered for low-carbon steel plate as the usual
standard which has the coefficient 1.
After measurement and careful analysis, the capacity
coefficient:
• Medium-carbon steel = 0.95
• High-carbon-steel = 0.90
• Low-alloy steel = 0.75
• Cast Iron = 0.50
WARNING
CAUTION
WARNING
CAUTION
WARNING
