RM R8 ULTRA - 13000 Gs / N52 - magnetic distributor

Pros as well as cons of neodymium magnets.

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:

• They retain magnetic properties for almost ten years – the loss is just ~1% (based on simulations),
• They possess excellent resistance to magnetism drop due to opposing magnetic fields,
• In other words, due to the aesthetic finish of gold, the element gains visual value,
• Neodymium magnets create maximum magnetic induction on a small surface, which allows for strong attraction,
• Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
• Due to the possibility of flexible molding and customization to unique solutions, neodymium magnets can be created in a wide range of forms and dimensions, which expands the range of possible applications,
• Huge importance in innovative solutions – they are utilized in mass storage devices, electromotive mechanisms, medical equipment, and industrial machines.
• Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Cons of neodymium magnets: tips and applications.

• To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
• Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
• They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
• We recommend a housing - magnetic mount, due to difficulties in producing nuts inside the magnet and complex shapes.
• Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. Additionally, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
• Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Best holding force of the magnet in ideal parameters – what contributes to it?

The declared magnet strength concerns the peak performance, measured under optimal environment, meaning:

• using a plate made of mild steel, acting as a ideal flux conductor
• with a cross-section no less than 10 mm
• with a plane perfectly flat
• with direct contact (without impurities)
• under perpendicular application of breakaway force (90-degree angle)
• in neutral thermal conditions

What influences lifting capacity in practice

In practice, the actual holding force is determined by many variables, presented from crucial:

• Clearance – existence of any layer (rust, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
• Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
• Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
• Metal type – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
• Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
• Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

* Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance {between} the magnet and the plate lowers the lifting capacity.