Product available Ships tomorrow

MW 4x8 / N38 - cylindrical magnet

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

cylindrical magnet

Catalog no 010079

GTIN/EAN: 5906301810780

5.00

Diameter Ø

4 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

0.75 g

Magnetization Direction

↑ axial

Load capacity

0.35 kg / 3.48 N

Magnetic Induction

599.59 mT / 5996 Gs

Coating

[NiCuNi] Nickel

view technical data »

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 1100 pcs

0.536 ZŁ

0.659 ZŁ

price from 4400 pcs

0.502 ZŁ

0.617 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Do you have purchase concerns?

Call us +48 22 499 98 98 if you prefer contact us by means of inquiry form our website.
Strength as well as form of a magnet can be calculated with our our magnetic calculator.

Same-day processing for orders placed before 14:00.

Product card - MW 4x8 / N38 - cylindrical magnet

Specification / characteristics - MW 4x8 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010079
GTIN/EAN	5906301810780
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	4 mm [±0,1 mm]
Height	8 mm [±0,1 mm]
Weight	0.75 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.35 kg / 3.48 N
Magnetic Induction ~ ?	599.59 mT / 5996 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 4x8 / 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 modeling of the magnet - data

The following data represent the direct effect of a mathematical simulation. Results are based on algorithms for the material Nd₂Fe₁₄B. Real-world performance may differ from theoretical values. Please consider these data as a reference point when designing systems.

Table 1: Static force (pull vs distance) - power drop
MW 4x8 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5984 Gs 598.4 mT	0.35 kg / 0.77 lbs 350.0 g / 3.4 N	safe
1 mm	3280 Gs 328.0 mT	0.11 kg / 0.23 lbs 105.1 g / 1.0 N	safe
2 mm	1696 Gs 169.6 mT	0.03 kg / 0.06 lbs 28.1 g / 0.3 N	safe
3 mm	941 Gs 94.1 mT	0.01 kg / 0.02 lbs 8.7 g / 0.1 N	safe
5 mm	371 Gs 37.1 mT	0.00 kg / 0.00 lbs 1.3 g / 0.0 N	safe
10 mm	82 Gs 8.2 mT	0.00 kg / 0.00 lbs 0.1 g / 0.0 N	safe
15 mm	31 Gs 3.1 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	safe
20 mm	15 Gs 1.5 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	safe
30 mm	5 Gs 0.5 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	safe
50 mm	1 Gs 0.1 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	safe

Pulling power weakens significantly with every mm of spacing. Note that even the smallest gap (e.g., contamination, paint, dust) strongly diminishes the holding power. Neodymiums operate strongest at the point of direct contact; distance nullifies the power. Notice how rapidly the load capacity plummet, when the magnet does not adhere flatly to the steel surface. When designing the assembly, eliminate additional spacers.

Table 2: Sliding load (vertical surface)
MW 4x8 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.07 kg / 0.15 lbs 70.0 g / 0.7 N
1 mm	Stal (~0.2)	0.02 kg / 0.05 lbs 22.0 g / 0.2 N
2 mm	Stal (~0.2)	0.01 kg / 0.01 lbs 6.0 g / 0.1 N
3 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 g / 0.0 N
5 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 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 table below defines the estimated holding capacity needed to cause the downward movement of the magnet down along a upright steel wall (assuming standard friction coefficient). This parameter varies with the separation distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 4x8 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.11 kg / 0.23 lbs 105.0 g / 1.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.07 kg / 0.15 lbs 70.0 g / 0.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.03 kg / 0.08 lbs 35.0 g / 0.3 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.18 kg / 0.39 lbs 175.0 g / 1.7 N

When mounting a element on a upright plane (e.g., a fridge), it you can count on barely about 1/5 of its nominal power. Gravity as well as a weak degree of grip mean that products move down easier than they pull off. Want to create a wall mount? Note that the sliding force is much weaker than the maximum static pull force. On a smooth steel, the holder will slip down under a much lighter weight. Application of an anti-slip coating can significantly increase the grip.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 4x8 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.03 kg / 0.08 lbs 35.0 g / 0.3 N
1 mm	25%	0.09 kg / 0.19 lbs 87.5 g / 0.9 N
2 mm	50%	0.18 kg / 0.39 lbs 175.0 g / 1.7 N
3 mm	75%	0.26 kg / 0.58 lbs 262.5 g / 2.6 N
5 mm	100%	0.35 kg / 0.77 lbs 350.0 g / 3.4 N
10 mm	100%	0.35 kg / 0.77 lbs 350.0 g / 3.4 N
11 mm	100%	0.35 kg / 0.77 lbs 350.0 g / 3.4 N
12 mm	100%	0.35 kg / 0.77 lbs 350.0 g / 3.4 N

A too thin steel cannot conduct the entire magnetic field, which wastes potential of the holder. If you mount a strong magnet to a thin surface, the magnetism will penetrate right through and the attraction force will be weaker. To utilize 100% of this neodymium's potential, you need a suitably thick backing of metal. The material oversaturation means that on sheet metal structures (e.g., car bodies), the magnet works worse. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal stability (material behavior) - power drop
MW 4x8 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	0.35 kg / 0.77 lbs 350.0 g / 3.4 N	OK
40 °C	-2.2%	0.34 kg / 0.75 lbs 342.3 g / 3.4 N	OK
60 °C	-4.4%	0.33 kg / 0.74 lbs 334.6 g / 3.3 N	OK
80 °C	-6.6%	0.33 kg / 0.72 lbs 326.9 g / 3.2 N
100 °C	-28.8%	0.25 kg / 0.55 lbs 249.2 g / 2.4 N

Ordinary NdFeB products lose strength above the temperature limit. Watch out for overheating – heat can irreversibly demagnetize this magnet. With increasing heat, the magnet's capacity briefly lowers. Avoid using this magnet close to heaters higher than its safe range. Too high temperature will lead to destruction of magnetic properties.

*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (pancake types) are more susceptible to demagnetization sooner compared to rod magnets. Red status in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 4x8 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	2.77 kg / 6.12 lbs 6 121 Gs	0.42 kg / 0.92 lbs 416 g / 4.1 N	N/A
1 mm	1.59 kg / 3.51 lbs 9 063 Gs	0.24 kg / 0.53 lbs 239 g / 2.3 N	1.43 kg / 3.16 lbs ~0 Gs
2 mm	0.83 kg / 1.84 lbs 6 559 Gs	0.12 kg / 0.28 lbs 125 g / 1.2 N	0.75 kg / 1.65 lbs ~0 Gs
3 mm	0.43 kg / 0.94 lbs 4 694 Gs	0.06 kg / 0.14 lbs 64 g / 0.6 N	0.38 kg / 0.85 lbs ~0 Gs
5 mm	0.12 kg / 0.27 lbs 2 498 Gs	0.02 kg / 0.04 lbs 18 g / 0.2 N	0.11 kg / 0.24 lbs ~0 Gs
10 mm	0.01 kg / 0.02 lbs 743 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.02 lbs ~0 Gs
20 mm	0.00 kg / 0.00 lbs 165 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
50 mm	0.00 kg / 0.00 lbs 17 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 10 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 7 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 5 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 3 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 3 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnetic products attract each other from a wider radius than a magnet and steel combination. Such a system of magnet-to-magnet generates a stronger field and a larger range of performance. Designing a powerful holder? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when attracting two neodymiums, the collision energy is massive. The repulsion force is a bit weaker than the connection force, but still large.
*Flux density for N-N configuration reaches ~0 Gs at the geometric center of the gap (due to field cancellation).
Important: Results demonstrate shear force of dual same magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (implants) - warnings
MW 4x8 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	3.5 cm
Hearing aid	10 Gs (1.0 mT)	2.5 cm
Mechanical watch	20 Gs (2.0 mT)	2.0 cm
Mobile device	40 Gs (4.0 mT)	1.5 cm
Remote	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	0.5 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

A strong magnetic field is a serious hazard to electronic devices as well as pacemakers. These neodymiums produce a field that prevents correct functioning of digital equipment. Notice: the invisible magnetic field penetrates the body and plastic. Special caution must be taken by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - collision effects
MW 4x8 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.79 km/h (6.05 m/s)	0.01 J
30 mm	37.74 km/h (10.48 m/s)	0.04 J
50 mm	48.72 km/h (13.53 m/s)	0.07 J
100 mm	68.89 km/h (19.14 m/s)	0.14 J

Neodymium magnets are delicate – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose turns into a projectile. Impact energy can cause material chips or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Use safety goggles when playing with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 4x8 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MW 4x8 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	836 Mx	8.4 µWb
P_c Coefficient	1.21	High (Stable)

Flux value passing through the magnet pole. Essential parameter in coil applications as well as sensors. The P_c coefficient determines the working geometry.

Table 11: Hydrostatics and buoyancy
MW 4x8 / N38

Environment	Effective steel pull	Effect
Air (land)	0.35 kg	Standard
Water (riverbed)	0.40 kg (+0.05 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

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

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 grade, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.21

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: 010079-2026

Measurement Calculator

Magnet pull force

Force (N)

Force in lbs

Magnetic Induction

Gauss (Gs)

Induction (T)

Input a figure in a single slot to get results for all other fields immediately.

Check out also deals

Product available Ships tomorrow

MW 4x5 / N38 - cylindrical magnet

0.320 ZŁ brutto / pcs

Product available Ships tomorrow

UI 45x13x6 [Z323] / N38 - badge holder

2.40 ZŁ brutto / pcs

Product available Ships tomorrow

MT 50x1.5x50000 - magnetic tape

430.50 ZŁ brutto / pcs

Product available Ships tomorrow

UMH 32x8x46 [M6] / N38 - magnetic holder with hook

22.14 ZŁ brutto / pcs

The presented product is an exceptionally strong cylindrical magnet, produced from durable NdFeB material, which, at dimensions of Ø4x8 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.35 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is ideal for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 3.48 N with a weight of only 0.75 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 4.1 mm) using epoxy glues. To ensure stability in industry, 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 90% of applications in modeling and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø4x8), 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 Ø4x8 mm, which, at a weight of 0.75 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 0.35 kg (force ~3.48 N), which, with such compact dimensions, proves the high power of the NdFeB material. 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 4 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.

Pros

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

Their magnetic field remains stable, and after approximately 10 years it drops only by ~1% (according to research),
Neodymium magnets are highly resistant to loss of magnetic properties caused by external field sources,
In other words, due to the shiny layer of nickel, the element looks attractive,
Magnets possess exceptionally strong magnetic induction on the outer side,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
Thanks to freedom in constructing and the ability to adapt to specific needs,
Universal use in modern industrial fields – they are used in HDD drives, brushless drives, medical equipment, and modern systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets suffer 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 corrode. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
Limited ability of making threads in the magnet and complicated shapes - recommended is casing - magnet mounting.
Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products are able to disrupt the diagnostic process medical when they are in the body.
With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Detachment force of the magnet in optimal conditions – what it depends on?

Magnet power was defined for the most favorable conditions, taking into account:

using a plate made of mild steel, serving as a ideal flux conductor
possessing a massiveness of min. 10 mm to avoid saturation
with an ideally smooth contact surface
without the slightest air gap between the magnet and steel
during pulling in a direction perpendicular to the mounting surface
at room temperature

Practical aspects of lifting capacity – factors

In practice, the real power is determined by a number of factors, presented from crucial:

Air gap (between the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, corrosion or debris).
Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be escaped to the other side.
Material type – ideal substrate is pure iron steel. Cast iron may have worse magnetic properties.
Surface quality – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Thermal environment – heating the magnet causes a temporary drop of force. Check the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet and the plate lowers the holding force.

Safety rules for work with NdFeB magnets

Medical interference

Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Beware of splinters

Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Flammability

Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Adults only

Strictly keep magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are very dangerous.

Metal Allergy

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If redness occurs, cease working with magnets and wear gloves.

Protect data

Powerful magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Impact on smartphones

Remember: neodymium magnets produce a field that interferes with sensitive sensors. Keep a separation from your mobile, tablet, and GPS.

Power loss in heat

Monitor thermal conditions. Heating the magnet to high heat will destroy its properties and strength.

Bone fractures

Risk of injury: The attraction force is so immense that it can cause hematomas, pinching, and broken bones. Use thick gloves.

Respect the power

Handle magnets with awareness. Their huge power can surprise even professionals. Plan your moves and do not underestimate their force.

Security! Need more info? Read our article: Why are neodymium magnets dangerous?

MW 4x8 / N38 - cylindrical magnet

Product card - MW 4x8 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - data

Table 1: Static force (pull vs distance) - power drop MW 4x8 / N38

Table 2: Sliding load (vertical surface) MW 4x8 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 4x8 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MW 4x8 / N38

Table 5: Thermal stability (material behavior) - power drop MW 4x8 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MW 4x8 / N38

Table 7: Safety (HSE) (implants) - warnings MW 4x8 / N38

Table 8: Impact energy (cracking risk) - collision effects MW 4x8 / N38

Table 9: Anti-corrosion coating durability MW 4x8 / N38

Table 10: Electrical data (Pc) MW 4x8 / N38

Table 11: Hydrostatics and buoyancy MW 4x8 / N38

1. Vertical hold

2. Efficiency vs thickness

3. Power loss vs temp

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

Material specification

Environmental data

Magnet pull force

Magnetic Induction

Check out also deals

MW 4x5 / N38 - cylindrical magnet

UI 45x13x6 [Z323] / N38 - badge holder

MT 50x1.5x50000 - magnetic tape

UMH 32x8x46 [M6] / N38 - magnetic holder with hook

Pros as well as cons of Nd2Fe14B magnets.

Pros

Cons

Lifting parameters

Detachment force of the magnet in optimal conditions – what it depends on?

Practical aspects of lifting capacity – factors

Safety rules for work with NdFeB magnets

Medical interference

Beware of splinters

Flammability

Adults only

Metal Allergy

Protect data

Impact on smartphones

Power loss in heat

Bone fractures

Respect the power

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - power drop
MW 4x8 / N38

Table 2: Sliding load (vertical surface)
MW 4x8 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 4x8 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MW 4x8 / N38

Table 5: Thermal stability (material behavior) - power drop
MW 4x8 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 4x8 / N38

Table 7: Safety (HSE) (implants) - warnings
MW 4x8 / N38

Table 8: Impact energy (cracking risk) - collision effects
MW 4x8 / N38

Table 9: Anti-corrosion coating durability
MW 4x8 / N38

Table 10: Electrical data (P_c)
MW 4x8 / N38

Table 11: Hydrostatics and buoyancy
MW 4x8 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.