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MW 25x6 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010050

GTIN/EAN: 5906301810490

5.00

Diameter Ø

25 mm [±0,1 mm]

Height

6 mm [±0,1 mm]

Weight

22.09 g

Magnetization Direction

↑ axial

Load capacity

10.27 kg / 100.71 N

Magnetic Induction

268.21 mT / 2682 Gs

Coating

[NiCuNi] Nickel

view properties »

7.40 ZŁ with VAT / pcs + price for transport

6.02 ZŁ net + 23% VAT / pcs

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Technical - MW 25x6 / N38 - cylindrical magnet

Specification / characteristics - MW 25x6 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010050
GTIN/EAN	5906301810490
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter Ø	25 mm [±0,1 mm]
Height	6 mm [±0,1 mm]
Weight	22.09 g
Magnetization Direction	↑ axial
Load capacity ~ ?	10.27 kg / 100.71 N
Magnetic Induction ~ ?	268.21 mT / 2682 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 25x6 / N38 - cylindrical magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Engineering modeling of the magnet - technical parameters

The following information are the direct effect of a mathematical analysis. Results rely on algorithms for the material Nd₂Fe₁₄B. Operational parameters may differ. Treat these calculations as a reference point for designers.

Table 1: Static pull force (force vs gap) - power drop
MW 25x6 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2682 Gs 268.2 mT	10.27 kg / 22.64 pounds 10270.0 g / 100.7 N	dangerous!
1 mm	2535 Gs 253.5 mT	9.18 kg / 20.23 pounds 9177.2 g / 90.0 N	warning
2 mm	2363 Gs 236.3 mT	7.97 kg / 17.57 pounds 7971.8 g / 78.2 N	warning
3 mm	2176 Gs 217.6 mT	6.76 kg / 14.91 pounds 6761.0 g / 66.3 N	warning
5 mm	1793 Gs 179.3 mT	4.59 kg / 10.13 pounds 4592.7 g / 45.1 N	warning
10 mm	1013 Gs 101.3 mT	1.46 kg / 3.23 pounds 1464.5 g / 14.4 N	low risk
15 mm	565 Gs 56.5 mT	0.46 kg / 1.00 pounds 455.3 g / 4.5 N	low risk
20 mm	330 Gs 33.0 mT	0.16 kg / 0.34 pounds 155.7 g / 1.5 N	low risk
30 mm	134 Gs 13.4 mT	0.03 kg / 0.06 pounds 25.6 g / 0.3 N	low risk
50 mm	36 Gs 3.6 mT	0.00 kg / 0.00 pounds 1.9 g / 0.0 N	low risk

Magnetic force weakens significantly with every mm of gap. Remember that even the smallest gap (e.g., contamination, varnish, veneer) strongly weakens the grip. Neodymiums hold most effectively in perfect adhesion; air break drastically cuts the power. Notice how rapidly the pull force drop, when the product does not touch directly to the metal substrate. When calculating the mounting, avoid additional spacers.

Table 2: Slippage force (wall)
MW 25x6 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	2.05 kg / 4.53 pounds 2054.0 g / 20.1 N
1 mm	Stal (~0.2)	1.84 kg / 4.05 pounds 1836.0 g / 18.0 N
2 mm	Stal (~0.2)	1.59 kg / 3.51 pounds 1594.0 g / 15.6 N
3 mm	Stal (~0.2)	1.35 kg / 2.98 pounds 1352.0 g / 13.3 N
5 mm	Stal (~0.2)	0.92 kg / 2.02 pounds 918.0 g / 9.0 N
10 mm	Stal (~0.2)	0.29 kg / 0.64 pounds 292.0 g / 2.9 N
15 mm	Stal (~0.2)	0.09 kg / 0.20 pounds 92.0 g / 0.9 N
20 mm	Stal (~0.2)	0.03 kg / 0.07 pounds 32.0 g / 0.3 N
30 mm	Stal (~0.2)	0.01 kg / 0.01 pounds 6.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section shows the estimated weight limit sufficient to start the shifting of the magnet down on a upright steel wall (assuming standard friction coefficient). The holding force is relative to the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MW 25x6 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	3.08 kg / 6.79 pounds 3081.0 g / 30.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	2.05 kg / 4.53 pounds 2054.0 g / 20.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.03 kg / 2.26 pounds 1027.0 g / 10.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	5.14 kg / 11.32 pounds 5135.0 g / 50.4 N

When hanging a element on a upright plane (e.g., a fridge), it you can count on just about 20%-30% of its nominal power. Gravity as well as a weak degree of grip cause that magnets slide down faster than they pop off the substrate. Planning a wall mount? Remember that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the holder will slip down under a noticeably lighter cargo. Application of an anti-slip layer can drastically increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MW 25x6 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.51 kg / 1.13 pounds 513.5 g / 5.0 N
1 mm	13%	1.28 kg / 2.83 pounds 1283.8 g / 12.6 N
2 mm	25%	2.57 kg / 5.66 pounds 2567.5 g / 25.2 N
3 mm	38%	3.85 kg / 8.49 pounds 3851.3 g / 37.8 N
5 mm	63%	6.42 kg / 14.15 pounds 6418.7 g / 63.0 N
10 mm	100%	10.27 kg / 22.64 pounds 10270.0 g / 100.7 N
11 mm	100%	10.27 kg / 22.64 pounds 10270.0 g / 100.7 N
12 mm	100%	10.27 kg / 22.64 pounds 10270.0 g / 100.7 N

A thin metal plate is unable to absorb the full magnetic flux, which squanders power of the holder. Should you mount a strong magnet to a weak sheet, the flux will pass right through and the pull force will drop sharply. To utilize 100% of this neodymium's power, you need a suitably thick backing of steel. The saturation phenomenon means that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal resistance (stability) - power drop
MW 25x6 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	10.27 kg / 22.64 pounds 10270.0 g / 100.7 N	OK
40 °C	-2.2%	10.04 kg / 22.14 pounds 10044.1 g / 98.5 N	OK
60 °C	-4.4%	9.82 kg / 21.65 pounds 9818.1 g / 96.3 N
80 °C	-6.6%	9.59 kg / 21.15 pounds 9592.2 g / 94.1 N
100 °C	-28.8%	7.31 kg / 16.12 pounds 7312.2 g / 71.7 N

Ordinary NdFeB products change their properties power after exceeding the maximum temperature. Protect against heat – high temperature can irreversibly demagnetize this product. With increasing heat, the magnet's capacity briefly drops. Avoid using this product near heat sources higher than its safe range. Ignoring the limit will result in permanent loss of magnetic properties.

*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) may lose charge permanently sooner than long magnets. The danger warning in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 25x6 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	21.76 kg / 47.98 pounds 4 291 Gs	3.26 kg / 7.20 pounds 3264 g / 32.0 N	N/A
1 mm	20.66 kg / 45.54 pounds 5 225 Gs	3.10 kg / 6.83 pounds 3098 g / 30.4 N	18.59 kg / 40.98 pounds ~0 Gs
2 mm	19.45 kg / 42.87 pounds 5 070 Gs	2.92 kg / 6.43 pounds 2917 g / 28.6 N	17.50 kg / 38.58 pounds ~0 Gs
3 mm	18.18 kg / 40.09 pounds 4 902 Gs	2.73 kg / 6.01 pounds 2727 g / 26.8 N	16.36 kg / 36.08 pounds ~0 Gs
5 mm	15.60 kg / 34.39 pounds 4 541 Gs	2.34 kg / 5.16 pounds 2340 g / 23.0 N	14.04 kg / 30.95 pounds ~0 Gs
10 mm	9.73 kg / 21.46 pounds 3 587 Gs	1.46 kg / 3.22 pounds 1460 g / 14.3 N	8.76 kg / 19.31 pounds ~0 Gs
20 mm	3.10 kg / 6.84 pounds 2 025 Gs	0.47 kg / 1.03 pounds 465 g / 4.6 N	2.79 kg / 6.16 pounds ~0 Gs
50 mm	0.13 kg / 0.28 pounds 409 Gs	0.02 kg / 0.04 pounds 19 g / 0.2 N	0.11 kg / 0.25 pounds ~0 Gs
60 mm	0.05 kg / 0.12 pounds 268 Gs	0.01 kg / 0.02 pounds 8 g / 0.1 N	0.05 kg / 0.11 pounds ~0 Gs
70 mm	0.03 kg / 0.06 pounds 183 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs
80 mm	0.01 kg / 0.03 pounds 131 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.03 pounds ~0 Gs
90 mm	0.01 kg / 0.02 pounds 96 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.01 pounds 72 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnets attract each other from a much further distance than a magnet and sheet setup. Such a system of magnet-to-magnet creates a more powerful interaction and a larger range of operation. Want to build a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Remember that when attracting two neodymiums, the impact force is huge. The repulsion force is a bit weaker than the attraction, but still large.
*Flux density between like poles is approximately ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
* Estimates show friction force of a pair of matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MW 25x6 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.5 cm
Hearing aid	10 Gs (1.0 mT)	8.0 cm
Timepiece	20 Gs (2.0 mT)	6.5 cm
Mobile device	40 Gs (4.0 mT)	5.0 cm
Remote	50 Gs (5.0 mT)	4.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Powerful magnet radiation is a serious hazard to electronics and medical implants. These neodymiums generate a field that disrupts operation of digital equipment. Be aware: the unseen radiation passes through tissues and glass. Special caution must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MW 25x6 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	23.60 km/h (6.56 m/s)	0.47 J
30 mm	37.72 km/h (10.48 m/s)	1.21 J
50 mm	48.63 km/h (13.51 m/s)	2.02 J
100 mm	68.77 km/h (19.10 m/s)	4.03 J

NdFeB products are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or injury to skin. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear eye protection when handling with large magnets.

Table 9: Coating parameters (durability)
MW 25x6 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (P_c)
MW 25x6 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	14 740 Mx	147.4 µWb
P_c Coefficient	0.34	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter in coil applications as well as sensors. P_c value defines the working geometry.

Table 11: Physics of underwater searching
MW 25x6 / N38

Environment	Effective steel pull	Effect
Air (land)	10.27 kg	Standard
Water (riverbed)	11.76 kg (+1.49 kg buoyancy gain)	+14.5%

Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

Water displaces steel, making heavy objects slightly lighter. Buoyancy helps in lifting finds.

1. Sliding resistance

*Note: On a vertical wall, the magnet holds only ~20% of its nominal pull.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly weakens the holding force.

3. Power loss vs temp

*For N38 grade, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.34

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical specification and ecology

Chemical composition

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Ecology and recycling (GPSR)

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 010050-2026

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MW 7x2 / N38 - cylindrical magnet

0.381 ZŁ brutto / pcs

The presented product is a very strong rod magnet, made from advanced NdFeB material, which, with dimensions of Ø25x6 mm, guarantees optimal power. This specific item is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 10.27 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is created for building electric motors, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 100.71 N with a weight of only 22.09 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 25.1 mm) using two-component epoxy glues. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø25x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 25 mm and height 6 mm. The value of 100.71 N means that the magnet is capable of holding a weight many times exceeding its own mass of 22.09 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 25 mm. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:

They do not lose magnetism, even after nearly 10 years – the drop in power is only ~1% (theoretically),
They are noted for resistance to demagnetization induced by external magnetic fields,
By covering with a shiny coating of silver, the element acquires an nice look,
The surface of neodymium magnets generates a powerful magnetic field – this is a distinguishing feature,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Thanks to flexibility in designing and the ability to adapt to complex applications,
Versatile presence in high-tech industry – they are commonly used in magnetic memories, electromotive mechanisms, medical equipment, also industrial machines.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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 resistant to moisture, when using outdoors
We suggest a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
Possible danger resulting from small fragments of magnets are risky, if swallowed, which gains importance in the context of child safety. Furthermore, tiny parts of these magnets can complicate diagnosis medical when they are in the body.
With budget limitations the cost of neodymium magnets is a challenge,

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

The declared magnet strength refers to the maximum value, recorded under optimal environment, namely:

on a base made of mild steel, optimally conducting the magnetic field
possessing a massiveness of at least 10 mm to ensure full flux closure
characterized by lack of roughness
under conditions of gap-free contact (metal-to-metal)
for force applied at a right angle (pull-off, not shear)
at standard ambient temperature

Practical lifting capacity: influencing factors

In real-world applications, the actual holding force results from several key aspects, listed from the most important:

Air gap (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
Steel thickness – insufficiently thick plate does not close the flux, causing part of the power to be wasted to the other side.
Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness creates an air distance.
Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets

Threat to electronics

Equipment safety: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Conscious usage

Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Maximum temperature

Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.

GPS and phone interference

Remember: rare earth magnets produce a field that confuses precision electronics. Keep a safe distance from your phone, device, and GPS.

Dust explosion hazard

Powder produced during grinding of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.

Eye protection

NdFeB magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets leads to them breaking into small pieces.

Warning for allergy sufferers

Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, prevent touching magnets with bare hands and choose versions in plastic housing.

Do not give to children

Adult use only. Small elements pose a choking risk, causing intestinal necrosis. Store away from kids and pets.

Crushing risk

Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Medical implants

Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Attention! Learn more about risks in the article: Magnet Safety Guide.

MW 25x6 / N38 - cylindrical magnet

Technical - MW 25x6 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the magnet - technical parameters

Table 1: Static pull force (force vs gap) - power drop MW 25x6 / N38

Table 2: Slippage force (wall) MW 25x6 / N38

Table 3: Wall mounting (sliding) - vertical pull MW 25x6 / N38

Table 4: Steel thickness (substrate influence) - power losses MW 25x6 / N38

Table 5: Thermal resistance (stability) - power drop MW 25x6 / N38

Table 6: Two magnets (attraction) - forces in the system MW 25x6 / N38

Table 7: Hazards (electronics) - precautionary measures MW 25x6 / N38

Table 8: Dynamics (cracking risk) - collision effects MW 25x6 / N38

Table 9: Coating parameters (durability) MW 25x6 / N38

Table 10: Construction data (Pc) MW 25x6 / N38

Table 11: Physics of underwater searching MW 25x6 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Power loss vs temp

4. Demagnetization curve and operating point (B-H)

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Field Strength

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Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Cons

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

Practical lifting capacity: influencing factors

Safe handling of NdFeB magnets

Threat to electronics

Conscious usage

Maximum temperature

GPS and phone interference

Dust explosion hazard

Eye protection

Warning for allergy sufferers

Do not give to children

Crushing risk

Medical implants

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - power drop
MW 25x6 / N38

Table 2: Slippage force (wall)
MW 25x6 / N38

Table 3: Wall mounting (sliding) - vertical pull
MW 25x6 / N38

Table 4: Steel thickness (substrate influence) - power losses
MW 25x6 / N38

Table 5: Thermal resistance (stability) - power drop
MW 25x6 / N38

Table 6: Two magnets (attraction) - forces in the system
MW 25x6 / N38

Table 7: Hazards (electronics) - precautionary measures
MW 25x6 / N38

Table 8: Dynamics (cracking risk) - collision effects
MW 25x6 / N38

Table 9: Coating parameters (durability)
MW 25x6 / N38

Table 10: Construction data (P_c)
MW 25x6 / N38

Table 11: Physics of underwater searching
MW 25x6 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.