HH 32x7.8 [M5] / N38 - through hole magnetic holder

Pros as well as cons of NdFeB magnets.

Besides their remarkable strength, neodymium magnets offer the following advantages:

• They have stable power, and over around 10 years their attraction force decreases symbolically – ~1% (according to theory),
• Neodymium magnets are distinguished by highly resistant to demagnetization caused by external interference,
• The use of an refined coating of noble metals (nickel, gold, silver) causes the element to present itself better,
• Neodymium magnets ensure maximum magnetic induction on a contact point, which allows for strong attraction,
• Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
• Possibility of custom creating as well as adapting to complex needs,
• Versatile presence in modern industrial fields – they find application in data components, electromotive mechanisms, advanced medical instruments, and technologically advanced constructions.
• Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages of NdFeB magnets:

• At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
• When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
• 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 complex shapes in magnets, we recommend using cover - magnetic holder.
• Potential hazard resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, small elements of these products can disrupt the diagnostic process medical in case of swallowing.
• Due to expensive raw materials, their price is higher than average,

Maximum lifting capacity of the magnet – what contributes to it?

The lifting capacity listed is a result of laboratory testing performed under the following configuration:

• using a base made of low-carbon steel, serving as a ideal flux conductor
• whose thickness is min. 10 mm
• with an ideally smooth touching surface
• under conditions of gap-free contact (metal-to-metal)
• for force applied at a right angle (in the magnet axis)
• at temperature room level

Determinants of practical lifting force of a magnet

Bear in mind that the working load may be lower influenced by elements below, starting with the most relevant:

• Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
• Angle of force application – maximum parameter is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
• Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
• Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
• Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
• Thermal environment – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

* Lifting capacity was measured using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the holding force is lower. Additionally, even a minimal clearance {between} the magnet’s surface and the plate decreases the lifting capacity.