RM R1 - 10000 Gs / N52 - magnetic distributor

Advantages and disadvantages of rare earth magnets.

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

• They retain magnetic properties for almost ten years – the drop is just ~1% (in theory),
• Magnets very well resist against demagnetization caused by foreign field sources,
• A magnet with a smooth gold surface has an effective appearance,
• Neodymium magnets ensure maximum magnetic induction on a small 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 form) at temperatures up to 230°C and above...
• Thanks to freedom in forming and the capacity to modify to complex applications,
• Universal use in innovative solutions – they are used in hard drives, electric motors, medical equipment, and modern systems.
• Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Problematic aspects of neodymium magnets and ways of using them

• To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
• We warn that neodymium magnets can lose their strength 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 suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
• We recommend casing - magnetic holder, due to difficulties in producing nuts inside the magnet and complicated forms.
• Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products are able to complicate diagnosis medical in case of swallowing.
• Due to complex production process, their price is relatively high,

Detachment force of the magnet in optimal conditions – what affects it?

The force parameter is a measurement result conducted under standard conditions:

• using a plate made of high-permeability steel, functioning as a magnetic yoke
• with a thickness minimum 10 mm
• with a surface perfectly flat
• under conditions of no distance (metal-to-metal)
• for force applied at a right angle (pull-off, not shear)
• at ambient temperature room level

Key elements affecting lifting force

Please note that the application force will differ depending on the following factors, in order of importance:

• Clearance – existence of any layer (rust, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
• Angle of force application – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
• Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
• Chemical composition of the base – mild steel attracts best. Alloy steels decrease magnetic properties and holding force.
• Smoothness – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
• Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

* Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. Moreover, even a small distance {between} the magnet and the plate reduces the holding force.