Product available Ships in 2 days

MW 15x4 / 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 010030

GTIN/EAN: 5906301810292

5.00

Load capacity 4.22 kg / 41.38 N Magnetic Induction 291.60 mT / 2916 Gs

Diameter Ø: 15 mm [±0,1 mm]
Height: 4 mm [±0,1 mm]
Weight: 5.3 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

technical parameters »

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

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

Need advice?

Pick up the phone and ask +48 22 499 98 98 otherwise drop us a message through form through our site.
Weight as well as form of neodymium magnets can be tested with our magnetic calculator.

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

Technical details - 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 assembly - technical parameters

Presented information represent the outcome of a engineering calculation. Results rely on models for the class Nd₂Fe₁₄B. Operational performance may differ from theoretical values. Use these data as a reference point for designers.

Table 1: Static pull force (force 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 LBS 4220.0 g / 41.4 N	strong
1 mm	2620 Gs 262.0 mT	3.41 kg / 7.51 LBS 3408.2 g / 33.4 N	strong
2 mm	2276 Gs 227.6 mT	2.57 kg / 5.67 LBS 2571.6 g / 25.2 N	strong
3 mm	1928 Gs 192.8 mT	1.85 kg / 4.07 LBS 1845.5 g / 18.1 N	low risk
5 mm	1324 Gs 132.4 mT	0.87 kg / 1.92 LBS 870.3 g / 8.5 N	low risk
10 mm	505 Gs 50.5 mT	0.13 kg / 0.28 LBS 126.7 g / 1.2 N	low risk
15 mm	222 Gs 22.2 mT	0.02 kg / 0.05 LBS 24.4 g / 0.2 N	low risk
20 mm	113 Gs 11.3 mT	0.01 kg / 0.01 LBS 6.3 g / 0.1 N	low risk
30 mm	40 Gs 4.0 mT	0.00 kg / 0.00 LBS 0.8 g / 0.0 N	low risk
50 mm	10 Gs 1.0 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	low risk

Pulling power drops sharply with every mm of distance. Note that every additional insulation layer (e.g., dirt, paint, veneer) noticeably reduces the pull force. Magnets operate strongest during direct contact; distance nullifies the power. Notice how quickly the load capacity drop, when the magnet does not touch directly to the metal substrate. When designing the assembly, eliminate unnecessary gaps.

Table 2: Vertical capacity (wall)
MW 15x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.84 kg / 1.86 LBS 844.0 g / 8.3 N
1 mm	Stal (~0.2)	0.68 kg / 1.50 LBS 682.0 g / 6.7 N
2 mm	Stal (~0.2)	0.51 kg / 1.13 LBS 514.0 g / 5.0 N
3 mm	Stal (~0.2)	0.37 kg / 0.82 LBS 370.0 g / 3.6 N
5 mm	Stal (~0.2)	0.17 kg / 0.38 LBS 174.0 g / 1.7 N
10 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 26.0 g / 0.3 N
15 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 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

This section defines the estimated holding capacity necessary to start the slippage of the magnet vertically on a vertical metal surface (assuming standard friction coefficient). The holding force depends on the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - vertical pull
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 LBS 1266.0 g / 12.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.84 kg / 1.86 LBS 844.0 g / 8.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.42 kg / 0.93 LBS 422.0 g / 4.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.11 kg / 4.65 LBS 2110.0 g / 20.7 N

When placing a magnet on a upright wall (e.g., a fridge), it will only hold just approx. 20%-30% of nominal attraction strength. Gravitational force and a weak degree of grip cause that holders move down faster than they detach. Designing a vertical fastening? Remember that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the holder will give way down under a significantly smaller load. Using a rubber layer can significantly raise the stability.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 15x4 / N38

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

A thin metal plate cannot take in the entire magnetic field, which wastes potential of the holder. Should you mount a strong magnet to a too thin substrate, the field will penetrate right through and the attraction force will be weaker. To utilize the maximum of this magnet's potential, you need a suitably thick element of steel. The saturation effect means that on thin elements (e.g., car bodies), the magnet shows lower pull force. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal resistance (stability) - 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 LBS 4220.0 g / 41.4 N	OK
40 °C	-2.2%	4.13 kg / 9.10 LBS 4127.2 g / 40.5 N	OK
60 °C	-4.4%	4.03 kg / 8.89 LBS 4034.3 g / 39.6 N
80 °C	-6.6%	3.94 kg / 8.69 LBS 3941.5 g / 38.7 N
100 °C	-28.8%	3.00 kg / 6.62 LBS 3004.6 g / 29.5 N

Standard neodymium magnets change their properties strength past the thermal threshold. Avoid high temperatures – heat can permanently destroy this product. As the temperature rises, the neodymium's power temporarily drops. Refrain from using this magnet near heat sources exceeding its safe range. Ignoring the limit will cause irreversible degradation of magnetism.

*Engineering note: Thermal stability is determined by both grade, as well as the dimension ratios. Flat magnets (low permeance coefficient) may lose charge permanently at lower temperatures than taller cylinders. Red status in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 15x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	9.26 kg / 20.41 LBS 4 518 Gs	1.39 kg / 3.06 LBS 1389 g / 13.6 N	N/A
1 mm	8.40 kg / 18.53 LBS 5 555 Gs	1.26 kg / 2.78 LBS 1261 g / 12.4 N	7.56 kg / 16.68 LBS ~0 Gs
2 mm	7.48 kg / 16.48 LBS 5 239 Gs	1.12 kg / 2.47 LBS 1122 g / 11.0 N	6.73 kg / 14.84 LBS ~0 Gs
3 mm	6.54 kg / 14.42 LBS 4 901 Gs	0.98 kg / 2.16 LBS 981 g / 9.6 N	5.89 kg / 12.98 LBS ~0 Gs
5 mm	4.80 kg / 10.59 LBS 4 200 Gs	0.72 kg / 1.59 LBS 721 g / 7.1 N	4.32 kg / 9.53 LBS ~0 Gs
10 mm	1.91 kg / 4.21 LBS 2 648 Gs	0.29 kg / 0.63 LBS 286 g / 2.8 N	1.72 kg / 3.79 LBS ~0 Gs
20 mm	0.28 kg / 0.61 LBS 1 010 Gs	0.04 kg / 0.09 LBS 42 g / 0.4 N	0.25 kg / 0.55 LBS ~0 Gs
50 mm	0.00 kg / 0.01 LBS 128 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
60 mm	0.00 kg / 0.00 LBS 79 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 52 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 36 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 26 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 19 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 significantly greater distance than a neodymium and metal setup. The setup of magnet-to-magnet generates a stronger field and a further horizon of performance. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a steel. Remember that when attracting two neodymiums, the collision energy is massive. The levitation is a bit weaker than the connection force, but still large.
*The magnetic induction in repulsion mode is approximately ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
Attention: Figures show sliding force of a pair of same neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
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
Mechanical watch	20 Gs (2.0 mT)	4.0 cm
Mobile device	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

A strong magnetic field is a large risk to electronics as well as pacemakers. These magnets produce a flux that destroys function of digital equipment. Remember: the unseen radiation penetrates the body and plastic. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - warning
MW 15x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	25.48 km/h (7.08 m/s)	0.13 J
30 mm	25.84 km/h (7.18 m/s)	0.14 J
50 mm	25.85 km/h (7.18 m/s)	0.14 J
100 mm	25.85 km/h (7.18 m/s)	0.14 J

Magnetic elements are very brittle – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely turns into a projectile. Striking energy can destroy the magnet or painful pinches to fingers. Hold the magnet firmly during installation so it doesn't hit with great force against the steel surface. A collision at high speed means shattering of the neodymium. Wear eye protection when handling with large magnets.

Table 9: Coating parameters (durability)
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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical 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 when building generators and motors. The P_c coefficient determines the working geometry.

Table 11: Hydrostatics and buoyancy
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%

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

In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Note: On a vertical wall, the magnet holds just a fraction of its max power.

2. Plate thickness effect

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

3. Heat tolerance

*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 and environmental data

Elemental analysis

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Environmental data

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

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

batch number/type

id: 010030-2026

Measurement Calculator

Magnet pull force

Force in kg

Newtons (N)

Force in lbs

Field Strength

Gauss (Gs)

Tesla (T)

Enter a number in any box, to see the remaining units change in real-time.

Other deals

Product available Ships in 2 days

MP 22x6x10 / N38 - ring magnet

13.95 zł brutto / pcs

Product available Ships in 2 days

MP 36.2x11/6x7.5 / N38 - ring magnet

35.01 zł brutto / pcs

Product available Ships in 2 days

UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

11.91 zł brutto / pcs

Product available Ships in 2 days

SM 32x475 [2xM8] / N42 - magnetic separator

1414.50 zł brutto / pcs

The presented product is an extremely powerful cylindrical magnet, manufactured from durable NdFeB material, which, with dimensions of Ø15x4 mm, guarantees optimal power. This specific item features an accuracy of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 4.22 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is created for building electric motors, advanced sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 41.38 N with a weight of only 5.3 g, this rod is indispensable in electronics and wherever every gram matters.

Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 15.1 mm) using two-component epoxy glues. 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 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 (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 protects the surface 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 15 mm. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Pros and cons of neodymium magnets.

Benefits

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

They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
They possess excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
By applying a shiny layer of gold, the element has an proper look,
Neodymium magnets deliver maximum magnetic induction on a contact point, which increases force concentration,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Possibility of accurate shaping as well as optimizing to individual conditions,
Huge importance in modern industrial fields – they are used in magnetic memories, motor assemblies, diagnostic systems, as well as industrial machines.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of NdFeB magnets:

They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets experience 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
They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
Limited ability of creating threads in the magnet and complicated forms - preferred is a housing - magnet mounting.
Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these magnets can be problematic in diagnostics medical in case of swallowing.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Best holding force of the magnet in ideal parameters – what it depends on?

The specified lifting capacity concerns the maximum value, recorded under optimal environment, meaning:

on a base made of mild steel, perfectly concentrating the magnetic flux
with a cross-section of at least 10 mm
with a surface free of scratches
under conditions of ideal adhesion (metal-to-metal)
for force acting at a right angle (pull-off, not shear)
at conditions approx. 20°C

Lifting capacity in real conditions – factors

It is worth knowing that the working load may be lower influenced by the following factors, starting with the most relevant:

Gap between magnet and steel – every millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
Steel grade – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Warnings

Sensitization to coating

Certain individuals have a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Extended handling might lead to an allergic reaction. We strongly advise wear protective gloves.

Protect data

Avoid bringing magnets near a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Protective goggles

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Heat sensitivity

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

Pinching danger

Mind your fingers. Two large magnets will join immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!

Health Danger

Warning for patients: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Dust is flammable

Mechanical processing of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Do not underestimate power

Handle with care. Rare earth magnets attract from a distance and connect with massive power, often quicker than you can move away.

Product not for children

Absolutely store magnets out of reach of children. Risk of swallowing is high, and the effects of magnets connecting inside the body are fatal.

Compass and GPS

Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, device, and GPS.

Warning! Learn more about hazards in the article: Magnet Safety Guide.

MW 15x4 / N38 - cylindrical magnet

Technical details - MW 15x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - technical parameters

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

Table 2: Vertical capacity (wall) MW 15x4 / N38

Table 3: Wall mounting (shearing) - vertical pull MW 15x4 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MW 15x4 / N38

Table 5: Thermal resistance (stability) - resistance threshold MW 15x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MW 15x4 / N38

Table 7: Protective zones (implants) - warnings MW 15x4 / N38

Table 8: Dynamics (cracking risk) - warning MW 15x4 / N38

Table 9: Coating parameters (durability) MW 15x4 / N38

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

Table 11: Hydrostatics and buoyancy MW 15x4 / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Heat tolerance

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

Elemental analysis

Environmental data

Magnet pull force

Field Strength

Other deals

MP 22x6x10 / N38 - ring magnet

MP 36.2x11/6x7.5 / N38 - ring magnet

UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

SM 32x475 [2xM8] / N42 - magnetic separator

Pros and cons of neodymium magnets.

Benefits

Limitations

Holding force characteristics

Best holding force of the magnet in ideal parameters – what it depends on?

Lifting capacity in real conditions – factors

Warnings

Sensitization to coating

Protect data

Protective goggles

Heat sensitivity

Pinching danger

Health Danger

Dust is flammable

Do not underestimate power

Product not for children

Compass and GPS

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Vertical capacity (wall)
MW 15x4 / N38

Table 3: Wall mounting (shearing) - vertical pull
MW 15x4 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 15x4 / N38

Table 5: Thermal resistance (stability) - resistance threshold
MW 15x4 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 15x4 / N38

Table 7: Protective zones (implants) - warnings
MW 15x4 / N38

Table 8: Dynamics (cracking risk) - warning
MW 15x4 / N38

Table 9: Coating parameters (durability)
MW 15x4 / N38

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

Table 11: Hydrostatics and buoyancy
MW 15x4 / N38