UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

Strengths as well as weaknesses of NdFeB magnets.

Apart from their notable magnetism, neodymium magnets have these key benefits:

• They retain magnetic properties for almost 10 years – the drop is just ~1% (in theory),
• Magnets effectively protect themselves against demagnetization caused by ambient magnetic noise,
• Thanks to the smooth finish, the coating of nickel, gold-plated, or silver gives an modern appearance,
• Magnetic induction on the top side of the magnet is maximum,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
• Thanks to the potential of precise shaping and customization to individualized requirements, magnetic components can be created in a variety of shapes and sizes, which amplifies use scope,
• Significant place in innovative solutions – they are utilized in magnetic memories, brushless drives, advanced medical instruments, also industrial machines.
• Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages of NdFeB magnets:

• They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
• We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
• Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
• We recommend a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
• Potential hazard to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Furthermore, small components of these products are able to be problematic in diagnostics medical when they are in the body.
• Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, taking into account:

• using a plate made of mild steel, functioning as a circuit closing element
• whose thickness is min. 10 mm
• characterized by smoothness
• under conditions of ideal adhesion (metal-to-metal)
• under axial force vector (90-degree angle)
• at temperature room level

Practical lifting capacity: influencing factors

Effective lifting capacity is affected by working environment parameters, such as (from most important):

• Distance (betwixt the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
• Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
• Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
• Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
• Plate texture – ground elements ensure maximum contact, which improves force. Uneven metal weaken the grip.
• Temperature – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity was measured with the use of a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance {between} the magnet and the plate lowers the load capacity.