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Mechanical installation
4.1 Safety instructions relating to mechanical mounting
Risk of rotor permanent magnets causing crushing injuries
The forces of attraction of magnetic rotors act on materials that can be magnetized. The
forces of attraction increase significantly close to the rotor. The response threshold of 3 mT
for risk of injury through attraction and causing a projectile effect is reached at a distance of
100 mm (Directive 2013/35/EU). Rotors and materials that can be magnetized can
suddenly slam together unintentionally. Two rotors can also unintentionally slam together.
There is a significant risk of crushing when you are close to a rotor.
Close to the motor, the magnetic forces of attraction can be up to several kN. – Example:
Magnetic attractive forces are equivalent to a force of 100 kg, which is sufficient to trap a
body part.
• Do not underestimate the strength of the attractive forces, and work very carefully.
• Wear safety gloves.
• The work should be done by at least two people.
• Do not unpack the rotor until immediately before assembly.
• Never unpack several rotors at once.
• Never place the rotors directly next to one another without providing adequate
• Never carry any objects made of magnetizable materials (for example watches, steel or
• Immediately install the rotor after it has been unpacked.
• Use a special installation device when centering and assembling the stator and rotor as
• Keep the following tools at hand to release parts of the body (hand, fingers, foot etc.)
54
WARNING
protection.
iron tools) and/or permanent magnets close to the rotor! If tools that can be magnetized
are still required, then hold any tool firmly using both hands. Slowly bring the tool to the
rotor.
individual components. Maintain the special procedure.
trapped between two components:
– A hammer (about 3 kg) made of solid, non-magnetizable material
– Two pointed wedges (wedge angle approx. 10° - 15°, minimum height 50 mm) made
of solid, non-magnetizable material (e.g. hard wood)
Naturally cooled 1FW6 built-in torque motors
Operating Instructions, 07/2017, 6SN1197-0AF02-0BP2
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