UMGW 60x30x15 [M10] GW / N38 - magnetic holder internal thread

Strengths as well as weaknesses of rare earth magnets.

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

• They have stable power, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
• They do not lose their magnetic properties even under close interference source,
• Thanks to the metallic finish, the coating of nickel, gold-plated, or silver-plated gives an visually attractive appearance,
• Neodymium magnets achieve maximum magnetic induction on a their surface, which allows for strong attraction,
• Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
• In view of the possibility of accurate shaping and adaptation to individualized requirements, neodymium magnets can be created in a variety of geometric configurations, which expands the range of possible applications,
• Wide application in innovative solutions – they are utilized in magnetic memories, drive modules, diagnostic systems, and complex engineering applications.
• Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in small systems

Disadvantages of NdFeB magnets:

• They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
• Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
• Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
• Due to limitations in realizing threads and complicated forms in magnets, we recommend using a housing - magnetic mount.
• Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these magnets can disrupt the diagnostic process medical after entering the body.
• Due to neodymium price, their price is higher than average,

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

Information about lifting capacity was determined for ideal contact conditions, assuming:

• on a base made of mild steel, effectively closing the magnetic field
• whose thickness reaches at least 10 mm
• characterized by lack of roughness
• under conditions of ideal adhesion (metal-to-metal)
• under perpendicular force vector (90-degree angle)
• in temp. approx. 20°C

Lifting capacity in real conditions – factors

During everyday use, the actual holding force depends on a number of factors, presented from the most important:

• Distance – existence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
• Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
• Plate thickness – insufficiently thick steel does not accept the full field, causing part of the power to be escaped to the other side.
• Material composition – different alloys reacts the same. Alloy additives weaken the attraction effect.
• Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
• Temperature influence – high temperature reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance {between} the magnet’s surface and the plate decreases the lifting capacity.