UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread
magnetic holder internal thread
Catalog no 180319
GTIN: 5906301813750
Diameter Ø [±0,1 mm]
36 mm
Height [±0,1 mm]
18 mm
Height [±0,1 mm]
8 mm
Weight
52 g
Load capacity
40 kg / 392.27 N
23.99 ZŁ with VAT / pcs + price for transport
19.50 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros and cons of neodymium magnets.
Apart from their strong power, neodymium magnets have these key benefits:
- They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
- Magnets effectively defend themselves against loss of magnetization caused by foreign field sources,
- In other words, due to the glossy surface of silver, the element is aesthetically pleasing,
- Magnetic induction on the top side of the magnet remains exceptional,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Possibility of detailed shaping and modifying to complex applications,
- Key role in innovative solutions – they are utilized in mass storage devices, drive modules, advanced medical instruments, also multitasking production systems.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
What to avoid - cons of neodymium magnets: application proposals
- To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- We recommend cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated forms.
- Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Maximum holding power of the magnet – what affects it?
The force parameter is a result of laboratory testing executed under standard conditions:
- using a plate made of high-permeability steel, serving as a ideal flux conductor
- whose transverse dimension is min. 10 mm
- with a plane cleaned and smooth
- with total lack of distance (without paint)
- under perpendicular force vector (90-degree angle)
- in neutral thermal conditions
What influences lifting capacity in practice
Bear in mind that the working load will differ influenced by elements below, in order of importance:
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Steel grade – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
- Plate texture – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).
* Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the holding force is lower. In addition, even a small distance {between} the magnet’s surface and the plate reduces the lifting capacity.
Safe handling of NdFeB magnets
Serious injuries
Watch your fingers. Two large magnets will join immediately with a force of massive weight, destroying everything in their path. Be careful!
ICD Warning
People with a pacemaker must maintain an absolute distance from magnets. The magnetic field can stop the operation of the life-saving device.
Danger to the youngest
These products are not intended for children. Swallowing multiple magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.
Demagnetization risk
Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Safe distance
Device Safety: Strong magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, timepieces).
Metal Allergy
Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, prevent touching magnets with bare hands and select encased magnets.
Fire warning
Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.
Beware of splinters
Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets will cause them breaking into shards.
Handling rules
Use magnets consciously. Their powerful strength can shock even experienced users. Plan your moves and respect their force.
GPS Danger
GPS units and mobile phones are extremely sensitive to magnetic fields. Direct contact with a strong magnet can permanently damage the internal compass in your phone.
Warning!
Learn more about risks in the article: Safety of working with magnets.
