Special Information On Handling Switchable Permanent Magnets - MAGLOGIX MagnaDrill MXD-1.5 Manual De Instrucciones

Special Information on Handling Switchable Permanent Magnets

The magnetic surface is located on the underside of the MagnaDrill
through magnetic flux when activated. The magnet can be activated independently of the mains voltage by pressing the
lever down. For the magnet to be released, the black safety tab must be pushed by using the ball of your hand and the
lever pulled upwards. The machine remains attached to the workpiece even in the event of a power failure.
Material thickness
The magnetic flux of the permanent magnet requires a minimum material thickness of 8 mm to flow completely through
the workpiece. If this material thickness is not given, the maximum holding force is reduced in accordance with the
material thickness. Conventional electric or permanent magnets have a deeply penetrating magnetic field similar to tree
tap roots, and require a large material thickness of more than 25 mm to achieve the maximum holding force. The compact
magnetic field of the magnets is similar to a shallow root and achieves maximum holding force even with small material
thicknesses, so that drilling can be done with sufficient holding force even on thin sheets from only 3–4 mm thick.
Material
The load-bearing capacity of the permanent magnets is determined using an S235 material. Steels with a high carbon
content or whose structure has been changed by heat treatment have a low holding force. Foamed or pore-flawed cast
parts also have a lower holding force.
Material
Non-alloyed steel (0.1-0.3% C content)
Non-alloyed steel (0.3-0.5% C content)
Cast steel
Grey cast iron
Nickel
Stainless steel, aluminium, brass
Surface quality
If a kind of "air gap" is produced between the magnet and the work piece, this reduces the holding force. In the same way,
paint, rust, scale, surface coatings, grease or similar substances all form an air gap between the work piece and the
switchable magnet, reducing the holding force.
Temperature
The high-power permanent magnets installed in the magnet irreversibly lose their magnetic properties from a temperature
of more than 80°C, so that the full holding force is never reached again even after the magnets have cooled down.
10
®
MXD-1.5 and generates the magnetic holding force
Magnetic force in %
100
90-95
90
45
11
0