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MW 5x15 / 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: 1-6500
Rating: 5

cylindrical magnet

Catalog no 010084

GTIN/EAN: 5906301810834

5.00

Diameter Ø

5 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Weight

2.21 g

Magnetization Direction

↑ axial

Load capacity

0.48 kg / 4.68 N

Magnetic Induction

610.03 mT / 6100 Gs

Coating

[NiCuNi] Nickel

1.107 ZŁ with VAT / pcs + price for transport

0.900 ZŁ net + 23% VAT / pcs

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MW 5x15 / N38 - cylindrical magnet

Specification / characteristics MW 5x15 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010084
GTIN/EAN	5906301810834
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter Ø	5 mm [±0,1 mm]
Height	15 mm [±0,1 mm]
Weight	2.21 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.48 kg / 4.68 N
Magnetic Induction ~ ?	610.03 mT / 6100 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 5x15 / 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 modeling of the product - technical parameters

The following values represent the direct effect of a physical analysis. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Operational performance might slightly deviate from the simulation results. Use these data as a reference point for designers.

Table 1: Static force (pull vs gap) - power drop
MW 5x15 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	6091 Gs 609.1 mT	0.48 kg / 480.0 g 4.7 N	weak grip
1 mm	3823 Gs 382.3 mT	0.19 kg / 189.1 g 1.9 N	weak grip
2 mm	2261 Gs 226.1 mT	0.07 kg / 66.1 g 0.6 N	weak grip
3 mm	1378 Gs 137.8 mT	0.02 kg / 24.6 g 0.2 N	weak grip
5 mm	607 Gs 60.7 mT	0.00 kg / 4.8 g 0.0 N	weak grip
10 mm	154 Gs 15.4 mT	0.00 kg / 0.3 g 0.0 N	weak grip
15 mm	63 Gs 6.3 mT	0.00 kg / 0.1 g 0.0 N	weak grip
20 mm	32 Gs 3.2 mT	0.00 kg / 0.0 g 0.0 N	weak grip
30 mm	12 Gs 1.2 mT	0.00 kg / 0.0 g 0.0 N	weak grip
50 mm	3 Gs 0.3 mT	0.00 kg / 0.0 g 0.0 N	weak grip

Grip strength decreases sharply with every subsequent millimeter of spacing. Note that even the smallest gap (e.g., contamination, paint, veneer) strongly diminishes the holding power. Magnetic products hold most effectively at the point of direct contact; air break kills the force. Observe how rapidly the parameters drop, when the product does not touch directly to the metal substrate. When planning the assembly, discard additional spacers.

Table 2: Slippage Capacity (Wall)
MW 5x15 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.10 kg / 96.0 g 0.9 N
1 mm	Stal (~0.2)	0.04 kg / 38.0 g 0.4 N
2 mm	Stal (~0.2)	0.01 kg / 14.0 g 0.1 N
3 mm	Stal (~0.2)	0.00 kg / 4.0 g 0.0 N
5 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
10 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

This section defines the estimated shear load necessary to start the downward movement of the magnet vertically on a upright metal surface (considering typical friction coefficient). The holding force is a function of the distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MW 5x15 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.14 kg / 144.0 g 1.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.10 kg / 96.0 g 0.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.05 kg / 48.0 g 0.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.24 kg / 240.0 g 2.4 N

When mounting a holder on a upright plane (e.g., a fridge), it will only hold only about 1/5 of its maximum pull force. Gravity and a weak degree of grip influence the fact that magnets move down faster than they pull off. Designing a vertical fastening? Remember that the sliding force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a significantly smaller cargo. Utilizing a rubberized layer can effectively improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 5x15 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.05 kg / 48.0 g 0.5 N
1 mm	25%	0.12 kg / 120.0 g 1.2 N
2 mm	50%	0.24 kg / 240.0 g 2.4 N
5 mm	100%	0.48 kg / 480.0 g 4.7 N
10 mm	100%	0.48 kg / 480.0 g 4.7 N

A too thin steel is not enough to absorb the full magnetic flux, which wastes potential of the holder. If you install a neodymium to a too thin substrate, the flux will penetrate right through and the holding will be smaller. To achieve the maximum of this neodymium's potential, you need a suitably thick backing of metal. The saturation phenomenon means that on thin elements (e.g., appliance housings), the product holds weaker. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal resistance (stability) - thermal limit
MW 5x15 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.48 kg / 480.0 g 4.7 N	OK
40 °C	-2.2%	0.47 kg / 469.4 g 4.6 N	OK
60 °C	-4.4%	0.46 kg / 458.9 g 4.5 N	OK
80 °C	-6.6%	0.45 kg / 448.3 g 4.4 N
100 °C	-28.8%	0.34 kg / 341.8 g 3.4 N

Ordinary NdFeB products change their properties power above the temperature limit. Avoid high temperatures – excessive heat can permanently destroy this product. As the temperature rises, the magnet's power briefly decreases. Avoid using this magnet in hot environments higher than its safe range. Too high temperature will lead to destruction of magnetic properties.

*Engineering note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) may lose charge permanently sooner than taller cylinders. Red status in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 5x15 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	4.49 kg / 4491 g 44.1 N 6 154 Gs	N/A
1 mm	2.91 kg / 2912 g 28.6 N 9 810 Gs	2.62 kg / 2621 g 25.7 N ~0 Gs
2 mm	1.77 kg / 1769 g 17.4 N 7 646 Gs	1.59 kg / 1592 g 15.6 N ~0 Gs
3 mm	1.05 kg / 1046 g 10.3 N 5 880 Gs	0.94 kg / 942 g 9.2 N ~0 Gs
5 mm	0.37 kg / 372 g 3.7 N 3 507 Gs	0.34 kg / 335 g 3.3 N ~0 Gs
10 mm	0.04 kg / 45 g 0.4 N 1 213 Gs	0.04 kg / 40 g 0.4 N ~0 Gs
20 mm	0.00 kg / 3 g 0.0 N 309 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 37 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two strong neodymiums interact from a wider radius than a neodymium and metal combination. Such a system of two magnets generates a stronger field and a larger range of performance. Planning to create a powerful holder? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when attracting two neodymiums, the pinch force is extreme. The levitation is a bit weaker than the connection force, but still large.
*The magnetic induction for N-N configuration drops to ~0 Gs in the exact middle of the gap (due to field cancellation).

Table 7: Protective zones (implants) - warnings
MW 5x15 / 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
Phone / Smartphone	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

Extremely neodym field is a serious hazard to electronics as well as pacemakers. These neodymiums generate a field that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field passes through tissues and glass. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Also at risk are: mechanical watches, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - warning
MW 5x15 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	14.87 km/h (4.13 m/s)	0.02 J
30 mm	25.74 km/h (7.15 m/s)	0.06 J
50 mm	33.23 km/h (9.23 m/s)	0.09 J
100 mm	47.00 km/h (13.06 m/s)	0.19 J

NdFeB products are very brittle – a collision with steel risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Kinetic force can destroy the magnet or painful pinches to skin. Always hold the magnet during bringing near metal so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Use safety goggles when working with large magnets.

Table 9: Coating parameters (durability)
MW 5x15 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Generator data (Pc)
MW 5x15 / N38

Parameter	Value	Jedn. SI / Opis
Strumień (Flux)	1 382 Mx	13.8 µWb
Współczynnik Pc	1.38	Wysoki (Stabilny)

Total magnetic flux flowing through the pole face. Essential parameter for generator builders and sensors. Permeance Coefficient determines the working geometry.

Table 11: Hydrostatics and buoyancy
MW 5x15 / N38

Environment	Effective steel pull	Effect
Air (land)	0.48 kg	Standard
Water (riverbed)	0.55 kg (+0.07 kg Buoyancy gain)	+14.5%

Corrosion 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. Sliding resistance

*Caution: On a vertical surface, the magnet holds merely a fraction of its nominal pull.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) significantly limits the holding force.

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.38

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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.

Engineering data and GPSR

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%

Ecology and recycling (GPSR)

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

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

batch number/type

id: 010084-2025

Measurement Calculator

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This product is an incredibly powerful cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø5x15 mm, guarantees maximum efficiency. This specific item is characterized by a tolerance of ±0.1mm and industrial build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.48 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is created for building generators, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 4.68 N with a weight of only 2.21 g, this rod is indispensable in miniature devices and wherever every gram matters.

Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in industry, specialized industrial adhesives are used, which are safe for nickel 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 (Ø5x15), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

This model is characterized by dimensions Ø5x15 mm, which, at a weight of 2.21 g, makes it an element with impressive magnetic energy density. The value of 4.68 N means that the magnet is capable of holding a weight many times exceeding its own mass of 2.21 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 5 mm. Such an arrangement is most desirable 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.

Strengths and weaknesses of rare earth magnets.

Benefits

Besides their exceptional strength, neodymium magnets offer the following advantages:

They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
They have excellent resistance to magnetic field loss due to external magnetic sources,
In other words, due to the metallic finish of silver, the element gains a professional look,
Magnets are distinguished by huge magnetic induction on the active area,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of individual modeling and adjusting to defined needs,
Universal use in advanced technology sectors – they are used in data components, electric motors, advanced medical instruments, and technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in compact constructions

Weaknesses

Disadvantages of NdFeB magnets:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength 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 while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
Due to limitations in producing nuts and complex shapes in magnets, we propose using casing - magnetic holder.
Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
Due to expensive raw materials, their price is higher than average,

Holding force characteristics

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

Holding force of 0.48 kg is a theoretical maximum value executed under the following configuration:

with the use of a sheet made of special test steel, ensuring full magnetic saturation
whose thickness is min. 10 mm
with a plane cleaned and smooth
without any air gap between the magnet and steel
for force acting at a right angle (in the magnet axis)
in neutral thermal conditions

Lifting capacity in practice – influencing factors

In real-world applications, the actual holding force depends on a number of factors, listed from the most important:

Distance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
Angle of force application – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Plate material – low-carbon steel gives the best results. Alloy admixtures decrease magnetic permeability and holding force.
Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate reduces the holding force.

Warnings

Mechanical processing

Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.

Physical harm

Mind your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Protect data

Data protection: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

Medical interference

Warning for patients: Powerful magnets affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

No play value

Absolutely keep magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are life-threatening.

GPS and phone interference

Note: rare earth magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, device, and GPS.

Heat warning

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

Sensitization to coating

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, cease handling magnets and wear gloves.

Handling guide

Handle magnets consciously. Their powerful strength can surprise even experienced users. Plan your moves and respect their force.

Magnet fragility

Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Attention! Looking for details? Read our article: Why are neodymium magnets dangerous?

MW 5x15 / N38 - cylindrical magnet

Hunting for a discount?

MW 5x15 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the product - technical parameters

1. Sliding resistance

2. Steel thickness impact

3. Temperature resistance

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

Material specification

Ecology and recycling (GPSR)

Magnet Pull Force

Magnetic Induction

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MW 12x50 / N38 - cylindrical magnet

Strengths and weaknesses of rare earth magnets.

Benefits

Weaknesses

Holding force characteristics

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

Lifting capacity in practice – influencing factors

Mechanical processing

Physical harm

Protect data

Medical interference

No play value

GPS and phone interference

Heat warning

Sensitization to coating

Handling guide

Magnet fragility

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C