Product available Ships tomorrow

MW 15x4 / 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 010030

GTIN/EAN: 5906301810292

5.00

Diameter Ø

15 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

5.3 g

Magnetization Direction

↑ axial

Load capacity

4.22 kg / 41.38 N

Magnetic Induction

291.60 mT / 2916 Gs

Coating

[NiCuNi] Nickel

view technical data »

1.968 ZŁ with VAT / pcs + price for transport

1.600 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

1.600 ZŁ

1.968 ZŁ

price from 400 pcs

1.504 ZŁ

1.850 ZŁ

price from 1600 pcs

1.408 ZŁ

1.732 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Can't decide what to choose?

Give us a call +48 888 99 98 98 alternatively get in touch by means of form the contact form page.
Force as well as structure of magnetic components can be reviewed using our power calculator.

Orders placed before 14:00 will be shipped the same business day.

Physical properties - MW 15x4 / N38 - cylindrical magnet

Specification / characteristics - MW 15x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010030
GTIN/EAN	5906301810292
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	15 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	5.3 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.22 kg / 41.38 N
Magnetic Induction ~ ?	291.60 mT / 2916 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x4 / 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 - technical parameters

The following data represent the result of a engineering simulation. Values rely on models for the material Nd₂Fe₁₄B. Operational parameters may deviate from the simulation results. Please consider these data as a supplementary guide during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MW 15x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2915 Gs 291.5 mT	4.22 kg / 9.30 pounds 4220.0 g / 41.4 N	warning
1 mm	2620 Gs 262.0 mT	3.41 kg / 7.51 pounds 3408.2 g / 33.4 N	warning
2 mm	2276 Gs 227.6 mT	2.57 kg / 5.67 pounds 2571.6 g / 25.2 N	warning
3 mm	1928 Gs 192.8 mT	1.85 kg / 4.07 pounds 1845.5 g / 18.1 N	low risk
5 mm	1324 Gs 132.4 mT	0.87 kg / 1.92 pounds 870.3 g / 8.5 N	low risk
10 mm	505 Gs 50.5 mT	0.13 kg / 0.28 pounds 126.7 g / 1.2 N	low risk
15 mm	222 Gs 22.2 mT	0.02 kg / 0.05 pounds 24.4 g / 0.2 N	low risk
20 mm	113 Gs 11.3 mT	0.01 kg / 0.01 pounds 6.3 g / 0.1 N	low risk
30 mm	40 Gs 4.0 mT	0.00 kg / 0.00 pounds 0.8 g / 0.0 N	low risk
50 mm	10 Gs 1.0 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk

Pulling power drops drastically with every mm of spacing. Note that even the smallest gap (e.g., contamination, paint, rust) strongly weakens the grip. Neodymiums operate strongest at the point of direct contact; air break kills the power. Analyze how quickly the load capacity drop, when the magnet does not adhere flatly to the steel surface. When planning the mounting, eliminate unnecessary gaps.

Table 2: Shear load (vertical surface)
MW 15x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.84 kg / 1.86 pounds 844.0 g / 8.3 N
1 mm	Stal (~0.2)	0.68 kg / 1.50 pounds 682.0 g / 6.7 N
2 mm	Stal (~0.2)	0.51 kg / 1.13 pounds 514.0 g / 5.0 N
3 mm	Stal (~0.2)	0.37 kg / 0.82 pounds 370.0 g / 3.6 N
5 mm	Stal (~0.2)	0.17 kg / 0.38 pounds 174.0 g / 1.7 N
10 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 26.0 g / 0.3 N
15 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 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 defines the estimated weight limit sufficient to cause the slippage of the magnet vertically on a upright steel plate (considering typical friction). The holding force depends on the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 15x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.27 kg / 2.79 pounds 1266.0 g / 12.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.84 kg / 1.86 pounds 844.0 g / 8.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.42 kg / 0.93 pounds 422.0 g / 4.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.11 kg / 4.65 pounds 2110.0 g / 20.7 N

When hanging a magnet on a vertical surface (e.g., a car body), it will only hold just approx. 20%-30% of its nominal power. Gravity 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? Note that the shear force is much weaker than the maximum static pull force. On a slippery surface, the holder will slip down under a noticeably lighter load. Application of an anti-slip coating can drastically increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MW 15x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.42 kg / 0.93 pounds 422.0 g / 4.1 N
1 mm	25%	1.06 kg / 2.33 pounds 1055.0 g / 10.3 N
2 mm	50%	2.11 kg / 4.65 pounds 2110.0 g / 20.7 N
3 mm	75%	3.17 kg / 6.98 pounds 3165.0 g / 31.0 N
5 mm	100%	4.22 kg / 9.30 pounds 4220.0 g / 41.4 N
10 mm	100%	4.22 kg / 9.30 pounds 4220.0 g / 41.4 N
11 mm	100%	4.22 kg / 9.30 pounds 4220.0 g / 41.4 N
12 mm	100%	4.22 kg / 9.30 pounds 4220.0 g / 41.4 N

A thin metal plate cannot take in the full magnetic flux, which squanders power of the magnet. If you attach a powerful product to a weak sheet, the field will penetrate right through and the holding will be smaller. To squeeze 100% of this neodymium's potential, you require a sufficiently solid element of steel. The saturation effect means that on sheet metal structures (e.g., car bodies), the magnet holds weaker. We advise picking the steel thickness according to the table below.

Table 5: Working in heat (material behavior) - resistance threshold
MW 15x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.22 kg / 9.30 pounds 4220.0 g / 41.4 N	OK
40 °C	-2.2%	4.13 kg / 9.10 pounds 4127.2 g / 40.5 N	OK
60 °C	-4.4%	4.03 kg / 8.89 pounds 4034.3 g / 39.6 N
80 °C	-6.6%	3.94 kg / 8.69 pounds 3941.5 g / 38.7 N
100 °C	-28.8%	3.00 kg / 6.62 pounds 3004.6 g / 29.5 N

Standard neodymium magnets irreversibly lose strength above the temperature limit. Watch out for overheating – high temperature can irreversibly destroy this product. With every degree above norm, the neodymium's power briefly decreases. Refrain from using this product near heat sources exceeding its safe range. Too high temperature will result in destruction of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) are more susceptible to demagnetization at lower temperatures compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 15x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	9.26 kg / 20.41 pounds 4 518 Gs	1.39 kg / 3.06 pounds 1389 g / 13.6 N	N/A
1 mm	8.40 kg / 18.53 pounds 5 555 Gs	1.26 kg / 2.78 pounds 1261 g / 12.4 N	7.56 kg / 16.68 pounds ~0 Gs
2 mm	7.48 kg / 16.48 pounds 5 239 Gs	1.12 kg / 2.47 pounds 1122 g / 11.0 N	6.73 kg / 14.84 pounds ~0 Gs
3 mm	6.54 kg / 14.42 pounds 4 901 Gs	0.98 kg / 2.16 pounds 981 g / 9.6 N	5.89 kg / 12.98 pounds ~0 Gs
5 mm	4.80 kg / 10.59 pounds 4 200 Gs	0.72 kg / 1.59 pounds 721 g / 7.1 N	4.32 kg / 9.53 pounds ~0 Gs
10 mm	1.91 kg / 4.21 pounds 2 648 Gs	0.29 kg / 0.63 pounds 286 g / 2.8 N	1.72 kg / 3.79 pounds ~0 Gs
20 mm	0.28 kg / 0.61 pounds 1 010 Gs	0.04 kg / 0.09 pounds 42 g / 0.4 N	0.25 kg / 0.55 pounds ~0 Gs
50 mm	0.00 kg / 0.01 pounds 128 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.00 pounds 79 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 52 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 36 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 26 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 19 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums attract each other from a wider radius than a neodymium and metal combination. The setup of magnet-to-magnet generates a stronger field and a wider radius of action. Want to build a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the collision energy is massive. The repulsion force is slightly lower than the attraction, but still large.
*Field value for N-N configuration drops to ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Important: Calculations refer to friction force of a pair of same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (electronics) - precautionary measures
MW 15x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.5 cm
Hearing aid	10 Gs (1.0 mT)	5.0 cm
Timepiece	20 Gs (2.0 mT)	4.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.0 cm
Remote	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field poses a real danger to electronics as well as medical implants. These neodymiums produce a flux that prevents correct functioning of digital equipment. Remember: the invisible magnetic field penetrates the body and plastic. Exceptional care must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - collision effects
MW 15x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	28.99 km/h (8.05 m/s)	0.17 J
30 mm	49.30 km/h (13.69 m/s)	0.50 J
50 mm	63.63 km/h (17.68 m/s)	0.83 J
100 mm	89.99 km/h (25.00 m/s)	1.66 J

NdFeB products are very brittle – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can destroy the magnet or injury to fingers. Hold the magnet firmly during installation so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the neodymium. Use safety goggles when playing with large magnets.

Table 9: Corrosion resistance
MW 15x4 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MW 15x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 659 Mx	56.6 µWb
P_c Coefficient	0.37	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter for generator designers as well as sensors. P_c value determines the working geometry.

Table 11: Physics of underwater searching
MW 15x4 / N38

Environment	Effective steel pull	Effect
Air (land)	4.22 kg	Standard
Water (riverbed)	4.83 kg (+0.61 kg buoyancy gain)	+14.5%

Warning: 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 surface, the magnet holds just ~20% of its nominal pull.

2. Steel thickness impact

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

3. Temperature resistance

*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) = 0.37

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%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 010030-2026

Magnet Unit Converter

Pulling force

Force in lbs

Magnetic Field

Induction (Gs)

Input a figure in a single slot to see the conversion for the other fields right away.

See more products

Product available Ships tomorrow

FM Ruszt magnetyczny do leja fi 200 jednopoziomowy / N52 - magnetic filter

1968.00 ZŁ brutto / pcs

Product available Ships tomorrow

XT-6 magnetyzery do silników - BENZYNA i LPG + olej - XT-6 magnetizer

98.99 ZŁ brutto / pcs

Product available Ships tomorrow

SM 18x250 [2xM5] / N42 - magnetic separator

553.50 ZŁ brutto / pcs

Product available Ships tomorrow

MW 50x20 / N38 - cylindrical magnet

106.96 ZŁ brutto / pcs

This product is an incredibly powerful rod magnet, composed of modern NdFeB material, which, at dimensions of Ø15x4 mm, guarantees the highest energy density. This specific item features an accuracy of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 4.22 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring lightning-fast order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 41.38 N with a weight of only 5.3 g, this rod is indispensable in miniature devices 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 industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø15x4), 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 15 mm and height 4 mm. The value of 41.38 N means that the magnet is capable of holding a weight many times exceeding its own mass of 5.3 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 4 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Strengths

Apart from their consistent magnetic energy, neodymium magnets have these key benefits:

Their strength remains stable, and after around 10 years it decreases only by ~1% (theoretically),
They show high resistance to demagnetization induced by presence of other magnetic fields,
By using a shiny coating of gold, the element acquires an elegant look,
They show high magnetic induction at the operating surface, which improves attraction properties,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Possibility of individual modeling as well as adjusting to specific applications,
Versatile presence in future technologies – they serve a role in hard drives, electric motors, medical equipment, also complex engineering applications.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:

To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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 extremely 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 immune to moisture, in case of application outdoors
Limited possibility of producing threads in the magnet and complicated shapes - preferred is cover - mounting mechanism.
Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Additionally, small components of these magnets are able to disrupt the diagnostic process medical when they are in the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Detachment force of the magnet in optimal conditions – what contributes to it?

Magnet power was determined for optimal configuration, including:

using a plate made of low-carbon steel, acting as a magnetic yoke
whose thickness is min. 10 mm
with a plane perfectly flat
without any air gap between the magnet and steel
during pulling in a direction perpendicular to the mounting surface
at room temperature

Determinants of lifting force in real conditions

In practice, the actual lifting capacity depends on several key aspects, ranked from most significant:

Gap (between the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, rust or debris).
Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of nominal force).
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
Material type – ideal substrate is high-permeability steel. Cast iron may attract less.
Smoothness – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets

GPS and phone interference

Navigation devices and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Fire risk

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

Choking Hazard

NdFeB magnets are not toys. Swallowing a few magnets may result in them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Protect data

Avoid bringing magnets close to a purse, laptop, or TV. The magnetism can destroy these devices and erase data from cards.

Caution required

Handle with care. Neodymium magnets act from a long distance and snap with huge force, often faster than you can move away.

Power loss in heat

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

Fragile material

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

Pacemakers

Warning for patients: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Nickel allergy

A percentage of the population experience a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Extended handling might lead to an allergic reaction. We strongly advise use safety gloves.

Crushing force

Watch your fingers. Two powerful magnets will join immediately with a force of massive weight, destroying anything in their path. Be careful!

Safety First! More info about hazards in the article: Magnet Safety Guide.

MW 15x4 / N38 - cylindrical magnet

Physical properties - MW 15x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - technical parameters

Table 1: Static pull force (pull vs gap) - power drop MW 15x4 / N38

Table 2: Shear load (vertical surface) MW 15x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MW 15x4 / N38

Table 4: Steel thickness (substrate influence) - power losses MW 15x4 / N38

Table 5: Working in heat (material behavior) - resistance threshold MW 15x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MW 15x4 / N38

Table 7: Hazards (electronics) - precautionary measures MW 15x4 / N38

Table 8: Impact energy (cracking risk) - collision effects MW 15x4 / N38

Table 9: Corrosion resistance MW 15x4 / N38

Table 10: Construction data (Flux) MW 15x4 / N38

Table 11: Physics of underwater searching MW 15x4 / N38

1. Wall mount (shear)

2. Steel thickness impact

3. Temperature resistance

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

Elemental analysis

Sustainability

Pulling force

Magnetic Field

See more products

FM Ruszt magnetyczny do leja fi 200 jednopoziomowy / N52 - magnetic filter

XT-6 magnetyzery do silników - BENZYNA i LPG + olej - XT-6 magnetizer

SM 18x250 [2xM5] / N42 - magnetic separator

MW 50x20 / N38 - cylindrical magnet

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Weaknesses

Pull force analysis

Detachment force of the magnet in optimal conditions – what contributes to it?

Determinants of lifting force in real conditions

H&S for magnets

GPS and phone interference

Fire risk

Choking Hazard

Protect data

Caution required

Power loss in heat

Fragile material

Pacemakers

Nickel allergy

Crushing force

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - power drop
MW 15x4 / N38

Table 2: Shear load (vertical surface)
MW 15x4 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MW 15x4 / N38

Table 4: Steel thickness (substrate influence) - power losses
MW 15x4 / N38

Table 5: Working in heat (material behavior) - resistance threshold
MW 15x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 15x4 / N38

Table 7: Hazards (electronics) - precautionary measures
MW 15x4 / N38

Table 8: Impact energy (cracking risk) - collision effects
MW 15x4 / N38

Table 9: Corrosion resistance
MW 15x4 / N38

Table 10: Construction data (Flux)
MW 15x4 / N38

Table 11: Physics of underwater searching
MW 15x4 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.