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MW 20x5 / N38 - cylindrical magnet

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

cylindrical magnet

Catalog no 010044

GTIN/EAN: 5906301810438

5.00

Load capacity 6.93 kg / 67.95 N Magnetic Induction 277.16 mT / 2772 Gs

Diameter Ø: 20 mm [±0,1 mm]
Height: 5 mm [±0,1 mm]
Weight: 11.78 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

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Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

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Technical - MW 20x5 / N38 - cylindrical magnet

Specification / characteristics - MW 20x5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010044
GTIN/EAN	5906301810438
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	20 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	11.78 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.93 kg / 67.95 N
Magnetic Induction ~ ?	277.16 mT / 2772 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x5 / 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 analysis of the assembly - report

These values are the direct effect of a engineering analysis. Results were calculated on models for the material Nd₂Fe₁₄B. Operational parameters may differ from theoretical values. Treat these data as a reference point during assembly planning.

Table 1: Static pull force (pull vs distance) - characteristics
MW 20x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2771 Gs 277.1 mT	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N	strong
1 mm	2573 Gs 257.3 mT	5.97 kg / 13.17 pounds 5975.0 g / 58.6 N	strong
2 mm	2340 Gs 234.0 mT	4.94 kg / 10.89 pounds 4940.1 g / 48.5 N	strong
3 mm	2092 Gs 209.2 mT	3.95 kg / 8.70 pounds 3948.3 g / 38.7 N	strong
5 mm	1611 Gs 161.1 mT	2.34 kg / 5.17 pounds 2343.4 g / 23.0 N	strong
10 mm	775 Gs 77.5 mT	0.54 kg / 1.19 pounds 541.6 g / 5.3 N	safe
15 mm	387 Gs 38.7 mT	0.13 kg / 0.30 pounds 135.0 g / 1.3 N	safe
20 mm	211 Gs 21.1 mT	0.04 kg / 0.09 pounds 40.2 g / 0.4 N	safe
30 mm	80 Gs 8.0 mT	0.01 kg / 0.01 pounds 5.7 g / 0.1 N	safe
50 mm	20 Gs 2.0 mT	0.00 kg / 0.00 pounds 0.4 g / 0.0 N	safe

Pulling power drops drastically per each millimeter of spacing. Remember that even a microscopic distance (e.g., contamination, paint, veneer) noticeably reduces the pull force. Magnetic products hold optimally at the point of direct contact; distance nullifies the power. Observe how quickly the load capacity plummet, when the product does not touch directly to the steel surface. When planning the arrangement, avoid unnecessary gaps.

Table 2: Shear load (wall)
MW 20x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.39 kg / 3.06 pounds 1386.0 g / 13.6 N
1 mm	Stal (~0.2)	1.19 kg / 2.63 pounds 1194.0 g / 11.7 N
2 mm	Stal (~0.2)	0.99 kg / 2.18 pounds 988.0 g / 9.7 N
3 mm	Stal (~0.2)	0.79 kg / 1.74 pounds 790.0 g / 7.7 N
5 mm	Stal (~0.2)	0.47 kg / 1.03 pounds 468.0 g / 4.6 N
10 mm	Stal (~0.2)	0.11 kg / 0.24 pounds 108.0 g / 1.1 N
15 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 26.0 g / 0.3 N
20 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below calculates the estimated weight limit required to start the shifting of the magnet down along a upright steel plate (considering standard friction coefficient). The holding force depends on the gap size between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MW 20x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.08 kg / 4.58 pounds 2079.0 g / 20.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.39 kg / 3.06 pounds 1386.0 g / 13.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.69 kg / 1.53 pounds 693.0 g / 6.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.47 kg / 7.64 pounds 3465.0 g / 34.0 N

When mounting a holder on a upright wall (e.g., a fridge), it will maintain barely approx. 1/5 of its nominal power. Gravitational force as well as a weak degree of grip mean that products slide down easier than they detach. Planning a vertical fastening? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the holder will slip down under a much lighter weight. Application of an anti-slip layer can drastically improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 20x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.69 kg / 1.53 pounds 693.0 g / 6.8 N
1 mm	25%	1.73 kg / 3.82 pounds 1732.5 g / 17.0 N
2 mm	50%	3.47 kg / 7.64 pounds 3465.0 g / 34.0 N
3 mm	75%	5.20 kg / 11.46 pounds 5197.5 g / 51.0 N
5 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N
10 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N
11 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N
12 mm	100%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N

A too thin steel is not enough to take in the full magnetic flux, which wastes potential of the magnet. If you mount a strong magnet to a thin surface, the field will penetrate right through and the pull force will drop sharply. To squeeze 100% of this magnet's power, you require a sufficiently solid piece of metal. The saturation effect means that on delicate walls (e.g., appliance housings), the holder shows lower pull force. We advise picking the steel thickness from these parameters.

Table 5: Thermal resistance (stability) - power drop
MW 20x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	6.93 kg / 15.28 pounds 6930.0 g / 68.0 N	OK
40 °C	-2.2%	6.78 kg / 14.94 pounds 6777.5 g / 66.5 N	OK
60 °C	-4.4%	6.63 kg / 14.61 pounds 6625.1 g / 65.0 N
80 °C	-6.6%	6.47 kg / 14.27 pounds 6472.6 g / 63.5 N
100 °C	-28.8%	4.93 kg / 10.88 pounds 4934.2 g / 48.4 N

Standard neodymium magnets lose power above the temperature limit. Avoid high temperatures – excessive heat can irreversibly destroy this magnet. With every degree above norm, the magnet's force temporarily decreases. Refrain from using this magnet near heat sources exceeding its safe range. Exceeding the critical threshold will cause destruction of magnetism.

*Technical advisory: Thermal stability is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) may lose charge permanently at lower temperatures than taller cylinders. The danger warning in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MW 20x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	14.87 kg / 32.79 pounds 4 380 Gs	2.23 kg / 4.92 pounds 2231 g / 21.9 N	N/A
1 mm	13.89 kg / 30.63 pounds 5 357 Gs	2.08 kg / 4.59 pounds 2084 g / 20.4 N	12.50 kg / 27.57 pounds ~0 Gs
2 mm	12.82 kg / 28.27 pounds 5 146 Gs	1.92 kg / 4.24 pounds 1923 g / 18.9 N	11.54 kg / 25.44 pounds ~0 Gs
3 mm	11.71 kg / 25.82 pounds 4 918 Gs	1.76 kg / 3.87 pounds 1757 g / 17.2 N	10.54 kg / 23.24 pounds ~0 Gs
5 mm	9.51 kg / 20.97 pounds 4 433 Gs	1.43 kg / 3.15 pounds 1427 g / 14.0 N	8.56 kg / 18.88 pounds ~0 Gs
10 mm	5.03 kg / 11.09 pounds 3 223 Gs	0.75 kg / 1.66 pounds 754 g / 7.4 N	4.53 kg / 9.98 pounds ~0 Gs
20 mm	1.16 kg / 2.56 pounds 1 549 Gs	0.17 kg / 0.38 pounds 174 g / 1.7 N	1.05 kg / 2.31 pounds ~0 Gs
50 mm	0.03 kg / 0.07 pounds 251 Gs	0.00 kg / 0.01 pounds 5 g / 0.0 N	0.03 kg / 0.06 pounds ~0 Gs
60 mm	0.01 kg / 0.03 pounds 159 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs
70 mm	0.01 kg / 0.01 pounds 107 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.01 pounds 75 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 54 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 41 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnets attract each other from a wider radius than a magnet and steel combination. The connection of two magnets generates a stronger field and a wider radius of operation. Planning to create a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Be careful that when bringing together two magnets, the pinch force is extreme. The repulsion force is slightly lower than the attraction, but still significant.
*Field value between like poles drops to ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
* Calculations demonstrate sliding force of dual matching neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 20x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	8.5 cm
Hearing aid	10 Gs (1.0 mT)	6.5 cm
Mechanical watch	20 Gs (2.0 mT)	5.5 cm
Mobile device	40 Gs (4.0 mT)	4.0 cm
Remote	50 Gs (5.0 mT)	4.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

A strong magnetic field is a large risk to IT equipment and pacemakers. These NdFeB products generate a field that prevents correct functioning of digital equipment. Remember: the unseen radiation penetrates the body and glass. Increased vigilance must be taken by people with cochlear implants and insulin pumps. The risk also applies to: mechanical watches, remotes, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MW 20x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	24.91 km/h (6.92 m/s)	0.28 J
30 mm	25.76 km/h (7.16 m/s)	0.30 J
50 mm	25.78 km/h (7.16 m/s)	0.30 J
100 mm	25.78 km/h (7.16 m/s)	0.30 J

NdFeB products are prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a magnet released freely turns into a projectile. Kinetic force can cause material chips or dangerous crushing to skin. Be sure to control the product during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when handling with powerful specimens.

Table 9: Corrosion resistance
MW 20x5 / 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 following table defines the conditions under which this product can be safely used. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (P_c)
MW 20x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	9 675 Mx	96.7 µWb
P_c Coefficient	0.35	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter in coil applications and motors. P_c value determines the working geometry.

Table 11: Physics of underwater searching
MW 20x5 / N38

Environment	Effective steel pull	Effect
Air (land)	6.93 kg	Standard
Water (riverbed)	7.93 kg (+1.00 kg buoyancy gain)	+14.5%

Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.

1. Wall mount (shear)

*Warning: On a vertical surface, the magnet retains just approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Temperature resistance

*For N38 material, 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) = 0.35

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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 and environmental data

Elemental analysis

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%

Sustainability

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: 010044-2026

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The presented product is an extremely powerful cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø20x5 mm, guarantees maximum efficiency. This specific item is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 6.93 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 67.95 N with a weight of only 11.78 g, this rod is indispensable in electronics 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., 20.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Magnets N38 are strong enough for 90% of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø20x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.

This model is characterized by dimensions Ø20x5 mm, which, at a weight of 11.78 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 6.93 kg (force ~67.95 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against oxidation, 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 20 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Strengths

Besides their high retention, neodymium magnets are valued for these benefits:

They do not lose magnetism, even over around 10 years – the drop in power is only ~1% (based on measurements),
Neodymium magnets remain exceptionally resistant to demagnetization caused by external interference,
A magnet with a shiny gold surface has better aesthetics,
The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
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...
Due to the potential of flexible molding and customization to unique solutions, magnetic components can be produced in a variety of geometric configurations, which increases their versatility,
Versatile presence in modern technologies – they are used in computer drives, drive modules, advanced medical instruments, as well as modern systems.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power 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
Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
Limited possibility of creating nuts in the magnet and complex forms - preferred is a housing - magnetic holder.
Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small elements of these devices can disrupt the diagnostic process medical in case of swallowing.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

The declared magnet strength refers to the limit force, measured under ideal test conditions, specifically:

using a sheet made of low-carbon steel, acting as a magnetic yoke
whose thickness reaches at least 10 mm
characterized by lack of roughness
with zero gap (without impurities)
for force applied at a right angle (pull-off, not shear)
in neutral thermal conditions

Lifting capacity in practice – influencing factors

Effective lifting capacity is affected by specific conditions, mainly (from priority):

Air gap (between the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
Material type – ideal substrate is high-permeability steel. Cast iron may generate lower lifting capacity.
Surface finish – full contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Precautions when working with NdFeB magnets

Compass and GPS

A powerful magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to prevent damaging the sensors.

Combustion hazard

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Danger to pacemakers

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Product not for children

Neodymium magnets are not suitable for play. Eating multiple magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.

Protective goggles

NdFeB magnets are ceramic materials, which means they are very brittle. Impact of two magnets leads to them cracking into small pieces.

Skin irritation risks

It is widely known that nickel (standard magnet coating) is a strong allergen. If you have an allergy, avoid touching magnets with bare hands or opt for coated magnets.

Thermal limits

Control the heat. Heating the magnet to high heat will ruin its properties and pulling force.

Pinching danger

Risk of injury: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Use thick gloves.

Respect the power

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Safe distance

Avoid bringing magnets near a purse, computer, or screen. The magnetism can destroy these devices and erase data from cards.

Danger! Want to know more? Check our post: Are neodymium magnets dangerous?

MW 20x5 / N38 - cylindrical magnet

Technical - MW 20x5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the assembly - report

Table 1: Static pull force (pull vs distance) - characteristics MW 20x5 / N38

Table 2: Shear load (wall) MW 20x5 / N38

Table 3: Wall mounting (sliding) - vertical pull MW 20x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MW 20x5 / N38

Table 5: Thermal resistance (stability) - power drop MW 20x5 / N38

Table 6: Two magnets (attraction) - forces in the system MW 20x5 / N38

Table 7: Safety (HSE) (implants) - precautionary measures MW 20x5 / N38

Table 8: Dynamics (kinetic energy) - warning MW 20x5 / N38

Table 9: Corrosion resistance MW 20x5 / N38

Table 10: Construction data (Pc) MW 20x5 / N38

Table 11: Physics of underwater searching MW 20x5 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Temperature resistance

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

Elemental analysis

Sustainability

Force (pull)

Magnetic Induction

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Pros as well as cons of Nd2Fe14B magnets.

Strengths

Weaknesses

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

Lifting capacity in practice – influencing factors

Precautions when working with NdFeB magnets

Compass and GPS

Combustion hazard

Danger to pacemakers

Product not for children

Protective goggles

Skin irritation risks

Thermal limits

Pinching danger

Respect the power

Safe distance

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - characteristics
MW 20x5 / N38

Table 2: Shear load (wall)
MW 20x5 / N38

Table 3: Wall mounting (sliding) - vertical pull
MW 20x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MW 20x5 / N38

Table 5: Thermal resistance (stability) - power drop
MW 20x5 / N38

Table 6: Two magnets (attraction) - forces in the system
MW 20x5 / N38

Table 7: Safety (HSE) (implants) - precautionary measures
MW 20x5 / N38

Table 8: Dynamics (kinetic energy) - warning
MW 20x5 / N38

Table 9: Corrosion resistance
MW 20x5 / N38

Table 10: Construction data (P_c)
MW 20x5 / N38

Table 11: Physics of underwater searching
MW 20x5 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.