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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
Rating: 5

cylindrical magnet

Catalog no 010044

GTIN/EAN: 5906301810438

5.00

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

technical specifications »

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Technical details - 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

Physical analysis of the assembly - report

Presented data represent the outcome of a physical simulation. Results rely on models for the class Nd₂Fe₁₄B. Operational conditions may deviate from the simulation results. Please consider these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull vs gap) - 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

Magnetic force decreases drastically with every mm of spacing. Note that even a very thin break (e.g., contamination, paint, dust) strongly reduces the pull force. Magnetic products work strongest during direct contact; gap nullifies the force. Notice how rapidly the load capacity drop, when the product does not adhere flatly to the steel surface. When designing the arrangement, eliminate redundant distances.

Table 2: Slippage capacity (vertical surface)
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

This section presents the approximate holding capacity required to cause the slippage of the magnet downwards on a upright steel wall (assuming typical friction). The holding force varies with the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - 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 hanging a element on a vertical surface (e.g., a car body), it will only hold barely approx. 1/5 of its nominal power. Gravity as well as a weak degree of grip influence the fact that products slip easier than they pop off the substrate. Designing a wall mount? Consider that the shear force is noticeably lower than the maximum static pull force. On a slippery surface, the element will slide down under a noticeably lighter cargo. Application of an anti-slip layer can effectively raise the stability.

Table 4: Material efficiency (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 thin sheet is unable to absorb the full magnetic flux, which weakens actual performance of the magnet. If you attach a powerful product to a too thin substrate, the field will penetrate right through and the holding will be smaller. To utilize 100% of this neodymium's potential, you require a sufficiently solid piece of metal. The saturation phenomenon means that on thin elements (e.g., car bodies), the magnet works worse. We advise picking the steel thickness from these parameters.

Table 5: Thermal resistance (stability) - resistance threshold
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 irreversibly lose strength after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly destroy this product. As the temperature rises, the neodymium's force momentarily drops. Avoid using this product in hot environments exceeding its safe range. Exceeding the critical threshold will lead to irreversible degradation of magnetism.

*Important note: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) risk losing magnetic properties under lower heat stress than long magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 20x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (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 interact from a much further distance than a neodymium and metal setup. The connection of magnet-to-magnet generates a stronger field and a wider radius of performance. Want to build a solid fastener? Apply two magnets instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the collision energy is huge. The repulsion force is marginally weaker than the connection force, but still large.
*Flux density between like poles is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Note: Results demonstrate sliding force of a pair of same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - warnings
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

Extremely neodym field poses a real danger to electronics as well as pacemakers. These magnets produce a field that destroys function of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and plastic. Exceptional care must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - warning
MW 20x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.63 km/h (7.12 m/s)	0.30 J
30 mm	42.39 km/h (11.77 m/s)	0.82 J
50 mm	54.70 km/h (15.19 m/s)	1.36 J
100 mm	77.35 km/h (21.49 m/s)	2.72 J

Magnetic elements are very brittle – a violent impact against metal risks their cracking. Control the attraction moment – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Wear safety glasses when working 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

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)

Flux value passing through the pole surface. Key data for generator designers and motors. P_c value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
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: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

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

2. Plate thickness effect

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

3. Power loss vs temp

*For standard magnets, the safety limit 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.

Engineering data and GPSR

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%

Environmental data

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

Measurement Calculator

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MW 14x3 / N38 - cylindrical magnet

1.845 ZŁ brutto / pcs

This product is an extremely powerful cylindrical magnet, made from durable NdFeB material, which, at dimensions of Ø20x5 mm, guarantees maximum efficiency. The MW 20x5 / N38 model boasts an accuracy of ±0.1mm and professional build quality, making it an excellent solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 6.93 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is created for building electric motors, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 67.95 N with a weight of only 11.78 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 20.1 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 durability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. 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 store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 20 mm and height 5 mm. The key parameter here is the lifting capacity amounting to approximately 6.93 kg (force ~67.95 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 5 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard 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.

Benefits

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

They retain attractive force for around ten years – the drop is just ~1% (according to analyses),
They are resistant to demagnetization induced by external field influence,
The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of exact modeling and modifying to atypical applications,
Significant place in future technologies – they serve a role in hard drives, drive modules, medical devices, as well as industrial machines.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of NdFeB magnets:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures 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 immune to moisture, when using outdoors
Due to limitations in realizing nuts and complex shapes in magnets, we propose using casing - magnetic holder.
Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical in case of swallowing.
Due to neodymium price, their price is higher than average,

Lifting parameters

Highest magnetic holding force – what contributes to it?

Information about lifting capacity was defined for the most favorable conditions, including:

on a base made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of minimum 10 mm to ensure full flux closure
characterized by smoothness
under conditions of no distance (metal-to-metal)
during pulling in a direction perpendicular to the mounting surface
in stable room temperature

Lifting capacity in practice – influencing factors

Please note that the application force will differ influenced by the following factors, in order of importance:

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Direction of force – maximum parameter is available only during perpendicular pulling. The force required to slide of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
Base smoothness – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate decreases the load capacity.

H&S for magnets

Life threat

Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.

Threat to navigation

A powerful magnetic field negatively affects the functioning of magnetometers in smartphones and navigation systems. Maintain magnets near a device to avoid damaging the sensors.

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Keep away from computers

Powerful magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Stay away of at least 10 cm.

Beware of splinters

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

This is not a toy

Adult use only. Tiny parts pose a choking risk, leading to severe trauma. Store away from kids and pets.

Hand protection

Risk of injury: The pulling power is so immense that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Heat sensitivity

Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Nickel coating and allergies

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, cease handling magnets and wear gloves.

Caution required

Use magnets consciously. Their huge power can shock even professionals. Stay alert and do not underestimate their force.

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

MW 20x5 / N38 - cylindrical magnet

Technical details - MW 20x5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the assembly - report

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

Table 2: Slippage capacity (vertical surface) MW 20x5 / N38

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

Table 4: Material efficiency (saturation) - sheet metal selection MW 20x5 / N38

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

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 20x5 / N38

Table 7: Safety (HSE) (electronics) - warnings MW 20x5 / N38

Table 8: Collisions (cracking risk) - warning MW 20x5 / N38

Table 9: Corrosion resistance MW 20x5 / N38

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

Table 11: Hydrostatics and buoyancy MW 20x5 / N38

1. Shear force

2. Plate thickness effect

3. Power loss vs temp

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

Elemental analysis

Environmental data

Force (pull)

Field Strength

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MW 14x3 / N38 - cylindrical magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Limitations

Lifting parameters

Highest magnetic holding force – what contributes to it?

Lifting capacity in practice – influencing factors

H&S for magnets

Life threat

Threat to navigation

Dust explosion hazard

Keep away from computers

Beware of splinters

This is not a toy

Hand protection

Heat sensitivity

Nickel coating and allergies

Caution required

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Slippage capacity (vertical surface)
MW 20x5 / N38

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

Table 4: Material efficiency (saturation) - sheet metal selection
MW 20x5 / N38

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

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 20x5 / N38

Table 7: Safety (HSE) (electronics) - warnings
MW 20x5 / N38

Table 8: Collisions (cracking risk) - warning
MW 20x5 / N38

Table 9: Corrosion resistance
MW 20x5 / N38

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

Table 11: Hydrostatics and buoyancy
MW 20x5 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.