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MW 5x4 / 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 010089

GTIN/EAN: 5906301810889

5.00

Load capacity 0.84 kg / 8.24 N Magnetic Induction 524.45 mT / 5244 Gs

Diameter Ø: 5 mm [±0,1 mm]
Height: 4 mm [±0,1 mm]
Weight: 0.59 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

What is the maximum working temperature of a disc magnet?

Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.

What is the difference between N38, N42 and N52?

The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.

What is the dimensional tolerance?

±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

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.

PDF report Calculator

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical details - MW 5x4 / N38 - cylindrical magnet

Specification / characteristics - MW 5x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010089
GTIN/EAN	5906301810889
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	5 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	0.59 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.84 kg / 8.24 N
Magnetic Induction ~ ?	524.45 mT / 5244 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x4 / N38 - cylindrical magnet

properties	values	units
Remanence Br ?	12.2-12.6	kGs
Remanence Br ?	1220-1260	mT
Coercivity bHc ?	10.8-11.5	kOe
Coercivity bHc ?	860-915	kA/m
Intrinsic coercivity iHc	≥ 12	kOe
Intrinsic coercivity iHc	≥ 955	kA/m
Energy product BHmax ?	36-38	BH max MGOe
Energy product BHmax ?	287-303	BH max KJ/m
Maximum working 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	310	°C
Curie Temperature TF	590	°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 product - report

The following information constitute the result of a mathematical simulation. Values rely on algorithms for the material Nd₂Fe₁₄B. Operational parameters may differ from theoretical values. Use these calculations as a reference point during assembly planning.

Table 1: Static pull force (force vs distance) - characteristics
MW 5x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5236 Gs 523.6 mT	0.84 kg / 1.85 pounds 840.0 g / 8.2 N	safe
1 mm	3243 Gs 324.3 mT	0.32 kg / 0.71 pounds 322.1 g / 3.2 N	safe
2 mm	1850 Gs 185.0 mT	0.10 kg / 0.23 pounds 104.8 g / 1.0 N	safe
3 mm	1076 Gs 107.6 mT	0.04 kg / 0.08 pounds 35.5 g / 0.3 N	safe
5 mm	428 Gs 42.8 mT	0.01 kg / 0.01 pounds 5.6 g / 0.1 N	safe
10 mm	89 Gs 8.9 mT	0.00 kg / 0.00 pounds 0.2 g / 0.0 N	safe
15 mm	31 Gs 3.1 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe
20 mm	15 Gs 1.5 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe
30 mm	5 Gs 0.5 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe
50 mm	1 Gs 0.1 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe

Magnetic force drops sharply with every subsequent millimeter of gap. Remember that even a microscopic distance (e.g., dirt, varnish, rust) noticeably reduces the pull force. Magnetic products work most effectively during direct contact; distance drastically cuts the power. Notice how quickly the parameters fall, when the product does not touch directly to the steel surface. When calculating the arrangement, avoid redundant distances.

Table 2: Slippage force (vertical surface)
MW 5x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.17 kg / 0.37 pounds 168.0 g / 1.6 N
1 mm	Stal (~0.2)	0.06 kg / 0.14 pounds 64.0 g / 0.6 N
2 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 20.0 g / 0.2 N
3 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
5 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section calculates the approximate shear load necessary to cause the downward movement of the magnet vertically along a upright steel plate (considering standard friction). This parameter is a function of the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 5x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.25 kg / 0.56 pounds 252.0 g / 2.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.17 kg / 0.37 pounds 168.0 g / 1.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.08 kg / 0.19 pounds 84.0 g / 0.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.42 kg / 0.93 pounds 420.0 g / 4.1 N

When placing a magnet on a upright surface (e.g., a car body), it will maintain barely about 20%-30% of its nominal power. Gravitational force and a low friction coefficient influence the fact that magnets slip faster than they pop off the substrate. Want to create a vertical fastening? Remember that the shear force is much weaker than the maximum static pull force. On a painted metal, the element will slide down under a noticeably lighter cargo. Application of an anti-slip pad can significantly improve the result.

Table 4: Material efficiency (saturation) - power losses
MW 5x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.08 kg / 0.19 pounds 84.0 g / 0.8 N
1 mm	25%	0.21 kg / 0.46 pounds 210.0 g / 2.1 N
2 mm	50%	0.42 kg / 0.93 pounds 420.0 g / 4.1 N
3 mm	75%	0.63 kg / 1.39 pounds 630.0 g / 6.2 N
5 mm	100%	0.84 kg / 1.85 pounds 840.0 g / 8.2 N
10 mm	100%	0.84 kg / 1.85 pounds 840.0 g / 8.2 N
11 mm	100%	0.84 kg / 1.85 pounds 840.0 g / 8.2 N
12 mm	100%	0.84 kg / 1.85 pounds 840.0 g / 8.2 N

A thin metal plate cannot conduct the entire magnetic field, which weakens actual performance of the magnet. If you mount a strong magnet to a weak sheet, the magnetism will pass right through and the attraction force will be weaker. To achieve 100% of this neodymium's power, you require a sufficiently solid piece of metal. The saturation effect means that on sheet metal structures (e.g., car bodies), the product works worse. We recommend selecting the steel dimension according to the table below.

Table 5: Working in heat (material behavior) - resistance threshold
MW 5x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	0.84 kg / 1.85 pounds 840.0 g / 8.2 N	OK
40 °C	-2.2%	0.82 kg / 1.81 pounds 821.5 g / 8.1 N	OK
60 °C	-4.4%	0.80 kg / 1.77 pounds 803.0 g / 7.9 N	OK
80 °C	-6.6%	0.78 kg / 1.73 pounds 784.6 g / 7.7 N
100 °C	-28.8%	0.60 kg / 1.32 pounds 598.1 g / 5.9 N

Standard neodymium magnets lose parameters above the temperature limit. Avoid high temperatures – high temperature can irreversibly demagnetize this product. As the temperature rises, the magnet's capacity momentarily lowers. Avoid using this product close to ovens exceeding its working range. Too high temperature will cause irreversible degradation of magnetic properties.

*Technical advisory: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) risk losing magnetic properties sooner than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 5x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.32 kg / 7.32 pounds 5 894 Gs	0.50 kg / 1.10 pounds 498 g / 4.9 N	N/A
1 mm	2.14 kg / 4.72 pounds 8 408 Gs	0.32 kg / 0.71 pounds 321 g / 3.1 N	1.93 kg / 4.24 pounds ~0 Gs
2 mm	1.27 kg / 2.81 pounds 6 486 Gs	0.19 kg / 0.42 pounds 191 g / 1.9 N	1.15 kg / 2.53 pounds ~0 Gs
3 mm	0.73 kg / 1.61 pounds 4 909 Gs	0.11 kg / 0.24 pounds 109 g / 1.1 N	0.66 kg / 1.45 pounds ~0 Gs
5 mm	0.24 kg / 0.53 pounds 2 805 Gs	0.04 kg / 0.08 pounds 36 g / 0.4 N	0.21 kg / 0.47 pounds ~0 Gs
10 mm	0.02 kg / 0.05 pounds 857 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
20 mm	0.00 kg / 0.00 pounds 177 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
50 mm	0.00 kg / 0.00 pounds 16 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.00 pounds 9 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 6 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 4 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 3 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 2 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnetic products interact from a significantly greater distance than a neodymium and metal combination. Such a system of magnet-to-magnet produces a massive flux and a larger range of action. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when bringing together two magnets, the pinch force is huge. The repulsion force is slightly lower than the connection force, but still impressive.
*Flux density for N-N configuration drops to ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Note: Estimates show friction force of dual same neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - warnings
MW 5x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	3.0 cm
Hearing aid	10 Gs (1.0 mT)	2.5 cm
Mechanical watch	20 Gs (2.0 mT)	2.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	1.5 cm
Remote	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation poses a serious hazard to electronics as well as pacemakers. These magnets produce a flux that destroys function of digital equipment. Remember: the invisible magnetic field penetrates the body and plastic. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, remotes, speakers, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MW 5x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	19.17 km/h (5.32 m/s)	0.01 J
30 mm	19.18 km/h (5.33 m/s)	0.01 J
50 mm	19.18 km/h (5.33 m/s)	0.01 J
100 mm	19.18 km/h (5.33 m/s)	0.01 J

NdFeB products are prone to chipping – a violent impact against metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Kinetic force can trigger coating fragments or injury to fingers. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the magnet. Use safety goggles when handling with large magnets.

Table 9: Surface protection spec
MW 5x4 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MW 5x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	1 046 Mx	10.5 µWb
P_c Coefficient	0.79	High (Stable)

Flux value emitted by the pole surface. Essential parameter when building generators and motors. The P_c coefficient determines the magnet's operating point.

Table 11: Submerged application
MW 5x4 / N38

Environment	Effective steel pull	Effect
Air (land)	0.84 kg	Standard
Water (riverbed)	0.96 kg (+0.12 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!

Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains merely a fraction of its perpendicular strength.

2. Efficiency vs thickness

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

3. Heat tolerance

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.79

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 specification and ecology

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%

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: 010089-2026

Measurement Calculator

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The offered product is an extremely powerful cylinder magnet, composed of durable NdFeB material, which, with dimensions of Ø5x4 mm, guarantees the highest energy density. The MW 5x4 / N38 model features high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 0.84 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It successfully proves itself in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 8.24 N with a weight of only 0.59 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Magnets N38 are suitable for the majority 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 (Ø5x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø5x4 mm, which, at a weight of 0.59 g, makes it an element with high magnetic energy density. The value of 8.24 N means that the magnet is capable of holding a weight many times exceeding its own mass of 0.59 g. The product has a [NiCuNi] coating, which secures it 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 5 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 diametrically if your project requires it.

Strengths and weaknesses of neodymium magnets.

Pros

Besides their immense field intensity, neodymium magnets offer the following advantages:

Their magnetic field remains stable, and after around ten years it drops only by ~1% (according to research),
Magnets perfectly resist against demagnetization caused by external fields,
A magnet with a shiny silver surface has better aesthetics,
Neodymium magnets generate maximum magnetic induction on a small area, which allows for strong attraction,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
Considering the ability of accurate forming and adaptation to custom needs, neodymium magnets can be manufactured in a wide range of forms and dimensions, which amplifies use scope,
Significant place in innovative solutions – they serve a role in magnetic memories, electromotive mechanisms, advanced medical instruments, as well as industrial machines.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:

Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only secures them against impacts but also raises their durability
Neodymium magnets lose strength 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 very resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
We recommend casing - magnetic holder, due to difficulties in producing nuts inside the magnet and complex forms.
Potential hazard related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these devices are able to be problematic in diagnostics medical when they are in the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

Holding force of 0.84 kg is a theoretical maximum value conducted under specific, ideal conditions:

on a base made of mild steel, perfectly concentrating the magnetic flux
with a thickness no less than 10 mm
characterized by lack of roughness
under conditions of no distance (metal-to-metal)
for force acting at a right angle (in the magnet axis)
at conditions approx. 20°C

What influences lifting capacity in practice

During everyday use, the actual holding force depends on several key aspects, presented from most significant:

Air gap (between the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
Base massiveness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be wasted to the other side.
Plate material – low-carbon steel attracts best. Alloy steels reduce magnetic permeability and holding force.
Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.

Precautions when working with neodymium magnets

Handling rules

Use magnets consciously. Their powerful strength can shock even professionals. Stay alert and respect their power.

Bone fractures

Large magnets can smash fingers in a fraction of a second. Never put your hand betwixt two strong magnets.

Compass and GPS

A powerful magnetic field disrupts the operation of magnetometers in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid damaging the sensors.

Danger to pacemakers

For implant holders: Powerful magnets affect medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Eye protection

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.

Safe distance

Equipment safety: Strong magnets can damage payment cards and sensitive devices (heart implants, hearing aids, mechanical watches).

Mechanical processing

Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Thermal limits

Regular neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Skin irritation risks

Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, immediately stop handling magnets and use protective gear.

This is not a toy

Absolutely store magnets out of reach of children. Choking hazard is significant, and the effects of magnets clamping inside the body are life-threatening.

Caution! Need more info? Read our article: Are neodymium magnets dangerous?

MW 5x4 / N38 - cylindrical magnet

Technical details - MW 5x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the product - report

Table 1: Static pull force (force vs distance) - characteristics MW 5x4 / N38

Table 2: Slippage force (vertical surface) MW 5x4 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 5x4 / N38

Table 4: Material efficiency (saturation) - power losses MW 5x4 / N38

Table 5: Working in heat (material behavior) - resistance threshold MW 5x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MW 5x4 / N38

Table 7: Safety (HSE) (implants) - warnings MW 5x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects MW 5x4 / N38

Table 9: Surface protection spec MW 5x4 / N38

Table 10: Construction data (Flux) MW 5x4 / N38

Table 11: Submerged application MW 5x4 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Heat tolerance

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

Elemental analysis

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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Strengths and weaknesses of neodymium magnets.

Pros

Disadvantages

Pull force analysis

Magnetic strength at its maximum – what contributes to it?

What influences lifting capacity in practice

Precautions when working with neodymium magnets

Handling rules

Bone fractures

Compass and GPS

Danger to pacemakers

Eye protection

Safe distance

Mechanical processing

Thermal limits

Skin irritation risks

This is not a toy

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - characteristics
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Table 2: Slippage force (vertical surface)
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Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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Table 4: Material efficiency (saturation) - power losses
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Table 5: Working in heat (material behavior) - resistance threshold
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Table 6: Magnet-Magnet interaction (repulsion) - field collision
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Table 7: Safety (HSE) (implants) - warnings
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Table 8: Dynamics (kinetic energy) - collision effects
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Table 9: Surface protection spec
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Table 10: Construction data (Flux)
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Table 11: Submerged application
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