Product available Ships tomorrow

MW 8x4 / 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 010104

GTIN/EAN: 5906301811039

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

1.51 g

Magnetization Direction

↑ axial

Load capacity

2.04 kg / 20.00 N

Magnetic Induction

437.78 mT / 4378 Gs

Coating

[NiCuNi] Nickel

technical specifications »

0.701 ZŁ with VAT / pcs + price for transport

0.570 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

0.570 ZŁ

0.701 ZŁ

price from 875 pcs

0.513 ZŁ

0.631 ZŁ

price from 1750 pcs

0.502 ZŁ

0.617 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Can't decide what to choose?

Contact us by phone +48 888 99 98 98 or contact us through request form the contact section.
Force and appearance of magnetic components can be estimated using our online calculation tool.

Orders submitted before 14:00 will be dispatched today!

Technical details - MW 8x4 / N38 - cylindrical magnet

Specification / characteristics - MW 8x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010104
GTIN/EAN	5906301811039
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	8 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	1.51 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.04 kg / 20.00 N
Magnetic Induction ~ ?	437.78 mT / 4378 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x4 / 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

Technical analysis of the product - report

Presented values represent the result of a mathematical simulation. Results rely on models for the class Nd₂Fe₁₄B. Actual parameters might slightly differ. Please consider these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MW 8x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4374 Gs 437.4 mT	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N	strong
1 mm	3338 Gs 333.8 mT	1.19 kg / 2.62 LBS 1187.8 g / 11.7 N	safe
2 mm	2386 Gs 238.6 mT	0.61 kg / 1.34 LBS 607.0 g / 6.0 N	safe
3 mm	1663 Gs 166.3 mT	0.29 kg / 0.65 LBS 294.9 g / 2.9 N	safe
5 mm	824 Gs 82.4 mT	0.07 kg / 0.16 LBS 72.4 g / 0.7 N	safe
10 mm	205 Gs 20.5 mT	0.00 kg / 0.01 LBS 4.5 g / 0.0 N	safe
15 mm	76 Gs 7.6 mT	0.00 kg / 0.00 LBS 0.6 g / 0.0 N	safe
20 mm	36 Gs 3.6 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	safe
30 mm	12 Gs 1.2 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	safe
50 mm	3 Gs 0.3 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	safe

Pulling power decreases significantly with every mm of spacing. Keep in mind that even a microscopic distance (e.g., contamination, varnish, dust) significantly weakens the grip. Magnets hold optimally in perfect adhesion; air break kills the power. See how rapidly the load capacity drop, when the magnet does not touch directly to the metal substrate. When calculating the arrangement, avoid redundant distances.

Table 2: Vertical load (wall)
MW 8x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.41 kg / 0.90 LBS 408.0 g / 4.0 N
1 mm	Stal (~0.2)	0.24 kg / 0.52 LBS 238.0 g / 2.3 N
2 mm	Stal (~0.2)	0.12 kg / 0.27 LBS 122.0 g / 1.2 N
3 mm	Stal (~0.2)	0.06 kg / 0.13 LBS 58.0 g / 0.6 N
5 mm	Stal (~0.2)	0.01 kg / 0.03 LBS 14.0 g / 0.1 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

The following data defines the estimated shear load sufficient to initiate the sliding of the magnet vertically against a vertical metal surface (assuming standard friction). This parameter depends on the air gap between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 8x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.61 kg / 1.35 LBS 612.0 g / 6.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.41 kg / 0.90 LBS 408.0 g / 4.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.20 kg / 0.45 LBS 204.0 g / 2.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.02 kg / 2.25 LBS 1020.0 g / 10.0 N

When hanging a magnet on a vertical surface (e.g., a board), it will maintain only about 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient cause that products move down faster than they pop off the substrate. Want to create a vertical fastening? Remember that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the magnet will slide down under a significantly smaller weight. Utilizing a rubberized layer can drastically raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MW 8x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.20 kg / 0.45 LBS 204.0 g / 2.0 N
1 mm	25%	0.51 kg / 1.12 LBS 510.0 g / 5.0 N
2 mm	50%	1.02 kg / 2.25 LBS 1020.0 g / 10.0 N
3 mm	75%	1.53 kg / 3.37 LBS 1530.0 g / 15.0 N
5 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N
10 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N
11 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N
12 mm	100%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N

A too thin steel is unable to take in the entire magnetic field, which squanders power of the magnet. Should you mount a strong magnet to a too thin substrate, the field will penetrate right through and the pull force will drop sharply. To squeeze 100% of this magnet's potential, you need a suitably thick piece of metal. The saturation phenomenon means that on delicate walls (e.g., appliance housings), the magnet holds weaker. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal stability (material behavior) - resistance threshold
MW 8x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.04 kg / 4.50 LBS 2040.0 g / 20.0 N	OK
40 °C	-2.2%	2.00 kg / 4.40 LBS 1995.1 g / 19.6 N	OK
60 °C	-4.4%	1.95 kg / 4.30 LBS 1950.2 g / 19.1 N
80 °C	-6.6%	1.91 kg / 4.20 LBS 1905.4 g / 18.7 N
100 °C	-28.8%	1.45 kg / 3.20 LBS 1452.5 g / 14.2 N

Standard neodymium magnets irreversibly lose strength past the thermal threshold. Avoid high temperatures – high temperature can permanently destroy this product. As the temperature rises, the neodymium's capacity momentarily decreases. Avoid using this magnet in hot environments higher than its operating temperature limit. Exceeding the critical threshold will cause destruction of magnetism.

*Engineering note: Thermal stability is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress compared to rod magnets. The danger warning in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 8x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	5.93 kg / 13.07 LBS 5 531 Gs	0.89 kg / 1.96 LBS 889 g / 8.7 N	N/A
1 mm	4.63 kg / 10.21 LBS 7 730 Gs	0.69 kg / 1.53 LBS 694 g / 6.8 N	4.17 kg / 9.18 LBS ~0 Gs
2 mm	3.45 kg / 7.61 LBS 6 675 Gs	0.52 kg / 1.14 LBS 518 g / 5.1 N	3.11 kg / 6.85 LBS ~0 Gs
3 mm	2.49 kg / 5.50 LBS 5 674 Gs	0.37 kg / 0.82 LBS 374 g / 3.7 N	2.25 kg / 4.95 LBS ~0 Gs
5 mm	1.23 kg / 2.72 LBS 3 989 Gs	0.18 kg / 0.41 LBS 185 g / 1.8 N	1.11 kg / 2.45 LBS ~0 Gs
10 mm	0.21 kg / 0.46 LBS 1 648 Gs	0.03 kg / 0.07 LBS 32 g / 0.3 N	0.19 kg / 0.42 LBS ~0 Gs
20 mm	0.01 kg / 0.03 LBS 410 Gs	0.00 kg / 0.00 LBS 2 g / 0.0 N	0.01 kg / 0.03 LBS ~0 Gs
50 mm	0.00 kg / 0.00 LBS 39 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
60 mm	0.00 kg / 0.00 LBS 24 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
70 mm	0.00 kg / 0.00 LBS 15 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
80 mm	0.00 kg / 0.00 LBS 11 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
90 mm	0.00 kg / 0.00 LBS 8 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.00 kg / 0.00 LBS 6 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnetic products interact from a much further distance than a magnet and steel setup. The connection of two magnets creates a more powerful interaction and a further horizon of operation. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a steel. Remember that when attracting two neodymiums, the collision energy is extreme. The repulsion force is marginally weaker than the attraction, but still large.
*Flux density in repulsion mode drops to ~0 Gs in the exact middle between the magnets (due to field cancellation).
Attention: Estimates show sliding force of dual identical neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - warnings
MW 8x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	4.5 cm
Hearing aid	10 Gs (1.0 mT)	3.5 cm
Mechanical watch	20 Gs (2.0 mT)	2.5 cm
Mobile device	40 Gs (4.0 mT)	2.0 cm
Remote	50 Gs (5.0 mT)	2.0 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Powerful magnet radiation poses a real danger to electronic devices as well as medical implants. These neodymiums produce a flux that disrupts operation of sensitive medical devices. Notice: the invisible magnetic field passes through tissues and plastic. Exceptional care must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 8x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	37.12 km/h (10.31 m/s)	0.08 J
30 mm	64.21 km/h (17.83 m/s)	0.24 J
50 mm	82.89 km/h (23.02 m/s)	0.40 J
100 mm	117.22 km/h (32.56 m/s)	0.80 J

Neodymium magnets are prone to chipping – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Kinetic force can cause material chips or dangerous crushing to skin. Be sure to control the product during installation 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 eye protection when handling with large magnets.

Table 9: Surface protection spec
MW 8x4 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
MW 8x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	2 233 Mx	22.3 µWb
P_c Coefficient	0.59	Low (Flat)

Flux value emitted by the pole surface. Essential parameter when building generators and motors. P_c value determines the working geometry.

Table 11: Submerged application
MW 8x4 / N38

Environment	Effective steel pull	Effect
Air (land)	2.04 kg	Standard
Water (riverbed)	2.34 kg (+0.30 kg buoyancy gain)	+14.5%

Corrosion 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

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

2. Plate thickness effect

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

3. Thermal stability

*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) = 0.59

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

Material specification

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: 010104-2026

Quick Unit Converter

Pulling force

Force in lbs

Magnetic Field

Gauss (Gs)

Input a figure in just one field to see the conversion for all other fields at once.

Other proposals

Product available Ships tomorrow

UMC 25x6/4x8 / N38 - cylindrical magnetic holder

11.70 ZŁ brutto / pcs

Product available Ships tomorrow

MPL 20x8x4 / N38 - lamellar magnet

3.67 ZŁ brutto / pcs

Product available Ships tomorrow

MP 16x12x2 / N38 - ring magnet

1.304 ZŁ brutto / pcs

Product available Ships tomorrow

UMC 20x6/3x7 / N38 - cylindrical magnetic holder

6.99 ZŁ brutto / pcs

This product is a very strong cylinder magnet, composed of modern NdFeB material, which, at dimensions of Ø8x4 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 2.04 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building generators, advanced sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 20.00 N with a weight of only 1.51 g, this rod 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., 8.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, 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 frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø8x4), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

This model is characterized by dimensions Ø8x4 mm, which, at a weight of 1.51 g, makes it an element with high magnetic energy density. The value of 20.00 N means that the magnet is capable of holding a weight many times exceeding its own mass of 1.51 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 8 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.

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They retain magnetic properties for almost ten years – the loss is just ~1% (in theory),
They feature excellent resistance to magnetic field loss due to external fields,
Thanks to the shimmering finish, the plating of nickel, gold-plated, or silver gives an aesthetic appearance,
Magnetic induction on the working part of the magnet remains impressive,
Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
Considering the possibility of accurate shaping and customization to custom requirements, neodymium magnets can be created in a variety of geometric configurations, which makes them more universal,
Key role in high-tech industry – they are commonly used in hard drives, electromotive mechanisms, diagnostic systems, also industrial machines.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of neodymium magnets:

At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
We recommend cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complex shapes.
Potential hazard resulting from small fragments of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to be problematic in diagnostics medical after entering the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what contributes to it?

The force parameter is a measurement result executed under the following configuration:

using a plate made of mild steel, acting as a magnetic yoke
whose thickness reaches at least 10 mm
with an ideally smooth contact surface
without the slightest air gap between the magnet and steel
for force acting at a right angle (in the magnet axis)
in neutral thermal conditions

Practical lifting capacity: influencing factors

In practice, the actual holding force depends on several key aspects, listed from the most important:

Gap between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
Base massiveness – insufficiently thick steel does not accept the full field, causing part of the flux to be lost to the other side.
Material type – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
Smoothness – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Warnings

Do not underestimate power

Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

Danger to pacemakers

For implant holders: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Beware of splinters

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.

Danger to the youngest

Product intended for adults. Small elements can be swallowed, causing serious injuries. Store away from children and animals.

Thermal limits

Standard neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.

Data carriers

Do not bring magnets close to a purse, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.

GPS Danger

A strong magnetic field negatively affects the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets near a device to avoid breaking the sensors.

Skin irritation risks

Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, prevent direct skin contact and opt for versions in plastic housing.

Physical harm

Danger of trauma: The attraction force is so great that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Dust explosion hazard

Machining of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Safety First! Details about risks in the article: Magnet Safety Guide.

MW 8x4 / N38 - cylindrical magnet

Technical details - MW 8x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the product - report

Table 1: Static pull force (force vs gap) - characteristics MW 8x4 / N38

Table 2: Vertical load (wall) MW 8x4 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 8x4 / N38

Table 4: Material efficiency (substrate influence) - power losses MW 8x4 / N38

Table 5: Thermal stability (material behavior) - resistance threshold MW 8x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MW 8x4 / N38

Table 7: Protective zones (electronics) - warnings MW 8x4 / N38

Table 8: Collisions (cracking risk) - collision effects MW 8x4 / N38

Table 9: Surface protection spec MW 8x4 / N38

Table 10: Construction data (Flux) MW 8x4 / N38

Table 11: Submerged application MW 8x4 / N38

1. Sliding resistance

2. Plate thickness effect

3. Thermal stability

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

Material specification

Environmental data

Pulling force

Magnetic Field

Other proposals

UMC 25x6/4x8 / N38 - cylindrical magnetic holder

MPL 20x8x4 / N38 - lamellar magnet

MP 16x12x2 / N38 - ring magnet

UMC 20x6/3x7 / N38 - cylindrical magnetic holder

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

Cons

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Practical lifting capacity: influencing factors

Warnings

Do not underestimate power

Danger to pacemakers

Beware of splinters

Danger to the youngest

Thermal limits

Data carriers

GPS Danger

Skin irritation risks

Physical harm

Dust explosion hazard

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - characteristics
MW 8x4 / N38

Table 2: Vertical load (wall)
MW 8x4 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 8x4 / N38

Table 4: Material efficiency (substrate influence) - power losses
MW 8x4 / N38

Table 5: Thermal stability (material behavior) - resistance threshold
MW 8x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 8x4 / N38

Table 7: Protective zones (electronics) - warnings
MW 8x4 / N38

Table 8: Collisions (cracking risk) - collision effects
MW 8x4 / N38

Table 9: Surface protection spec
MW 8x4 / N38

Table 10: Construction data (Flux)
MW 8x4 / N38

Table 11: Submerged application
MW 8x4 / N38

Strengths and weaknesses of Nd₂Fe₁₄B magnets.