UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160305
GTIN: 5906301813637
Diameter Ø [±0,1 mm]
29 mm
Height [±0,1 mm]
8 mm
Weight
18 g
Load capacity
6.4 kg / 62.76 N
8.61 ZŁ with VAT / pcs + price for transport
7.00 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
Strengths and weaknesses of NdFeB magnets.
Besides their magnetic performance, neodymium magnets are valued for these benefits:
- They retain magnetic properties for nearly 10 years – the drop is just ~1% (according to analyses),
- Neodymium magnets are remarkably resistant to magnetic field loss caused by external interference,
- The use of an refined coating of noble metals (nickel, gold, silver) causes the element to look better,
- Neodymium magnets create maximum magnetic induction on a small surface, which allows for strong attraction,
- Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to freedom in forming and the capacity to customize to client solutions,
- Wide application in modern technologies – they serve a role in HDD drives, drive modules, advanced medical instruments, as well as technologically advanced constructions.
- Thanks to their power density, small magnets offer high operating force, occupying minimum space,
What to avoid - cons of neodymium magnets and ways of using them
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 extremely resistant to heat
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
- Due to limitations in producing nuts and complicated shapes in magnets, we propose using a housing - magnetic mount.
- Potential hazard related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these devices can disrupt the diagnostic process medical when they are in the body.
- Due to complex production process, their price exceeds standard values,
Maximum holding power of the magnet – what contributes to it?
Breakaway force was defined for the most favorable conditions, including:
- using a base made of mild steel, functioning as a magnetic yoke
- with a thickness no less than 10 mm
- characterized by lack of roughness
- with zero gap (without impurities)
- during detachment in a direction vertical to the mounting surface
- in temp. approx. 20°C
Lifting capacity in real conditions – factors
It is worth knowing that the working load may be lower influenced by elements below, starting with the most relevant:
- Space between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be escaped into the air.
- Material composition – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
- Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
- Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
* Lifting capacity was measured with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the load capacity is reduced by as much as 75%. In addition, even a minimal clearance {between} the magnet and the plate reduces the holding force.
H&S for magnets
Maximum temperature
Monitor thermal conditions. Heating the magnet to high heat will destroy its properties and pulling force.
Finger safety
Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!
Safe distance
Intense magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.
Material brittleness
Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Product not for children
These products are not suitable for play. Eating a few magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and requires immediate surgery.
Nickel coating and allergies
Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If an allergic reaction occurs, immediately stop handling magnets and use protective gear.
Life threat
Individuals with a ICD should keep an large gap from magnets. The magnetism can stop the functioning of the life-saving device.
Precision electronics
GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.
Handling guide
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Machining danger
Dust created during machining of magnets is combustible. Do not drill into magnets unless you are an expert.
Safety First!
Learn more about hazards in the article: Magnet Safety Guide.
