Product available Ships tomorrow

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: 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	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	T
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 106	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10-6	°C^-1
Young's modulus	1.7 x 104	kg/mm²

Engineering modeling of the assembly - report

These information constitute the outcome of a physical calculation. Results were calculated on models for the material NdFeB. Operational performance may deviate from the simulation results. Treat these calculations as a reference point when designing systems.

Table 1: Static force (force vs gap) - characteristics
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	safe
1 mm	3823 Gs 382.3 mT	0.19 kg / 189.1 g 1.9 N	safe
2 mm	2261 Gs 226.1 mT	0.07 kg / 66.1 g 0.6 N	safe
3 mm	1378 Gs 137.8 mT	0.02 kg / 24.6 g 0.2 N	safe
5 mm	607 Gs 60.7 mT	0.00 kg / 4.8 g 0.0 N	safe
10 mm	154 Gs 15.4 mT	0.00 kg / 0.3 g 0.0 N	safe
15 mm	63 Gs 6.3 mT	0.00 kg / 0.1 g 0.0 N	safe
20 mm	32 Gs 3.2 mT	0.00 kg / 0.0 g 0.0 N	safe
30 mm	12 Gs 1.2 mT	0.00 kg / 0.0 g 0.0 N	safe
50 mm	3 Gs 0.3 mT	0.00 kg / 0.0 g 0.0 N	safe

Pulling power weakens sharply with every subsequent millimeter of distance. Remember that even a very thin break (e.g., contamination, varnish, dust) strongly reduces the pull force. Magnets operate strongest at the point of direct contact; air break nullifies the force. Observe how flashily the load capacity drop, when the product does not adhere tightly to the metal substrate. When calculating the arrangement, avoid redundant distances.

Table 2: Vertical Force (Vertical Surface)
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

The following data defines the estimated force necessary to cause the slippage of the magnet downwards on a vertical steel plate (considering typical friction coefficient). This value depends on the separation distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
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 hanging a magnet on a upright surface (e.g., a board), it you can count on barely approx. 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient influence the fact that products slip easier than they detach. Designing a vertical fastening? Remember that the shear force is much weaker than the maximum static pull force. On a painted metal, the magnet will slip down under a noticeably lighter weight. Utilizing a rubberized pad can significantly raise the stability.

Table 4: Material efficiency (saturation) - power losses
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 thin sheet is not enough to focus the full magnetic flux, which squanders power of the holder. If you attach a powerful product to a thin surface, the magnetism will pass right through and the pull force will drop sharply. To squeeze 100% of this magnet's potential, you require a sufficiently solid backing of steel. The material oversaturation means that on delicate walls (e.g., car bodies), the holder holds weaker. We recommend selecting the steel thickness according to the table below.

Table 5: Thermal stability (stability) - power drop
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

Standard neodymium magnets lose strength past the thermal threshold. Protect against heat – excessive heat can permanently destroy this magnet. With increasing heat, the neodymium's capacity temporarily drops. Do not use this product near heat sources higher than its safe range. Exceeding the critical threshold will result in irreversible degradation of magnetic properties.

*Important note: Thermal stability is determined by both grade, but also on the magnet's shape. Low-profile magnets (pancake types) risk losing magnetic properties sooner than long magnets. The danger warning in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - forces in the system
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 magnetic products interact from a much further distance than a magnet and steel combination. The setup of two magnets generates a stronger field and a further horizon of performance. Designing a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Remember that when attracting two neodymiums, the collision energy is huge. The levitation is a bit weaker than the attraction, but still impressive.
*Flux density for N-N configuration drops to ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).

Table 7: Hazards (electronics) - precautionary measures
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
Timepiece	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 large risk to electronic devices as well as pacemakers. These neodymiums produce a field that prevents correct functioning of digital equipment. Be aware: the invisible magnetic field penetrates the body and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
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

Neodymium magnets are delicate – a violent impact against metal risks their cracking. Control the attraction moment – a neodymium left loose becomes dangerous. Kinetic force can cause material chips or injury to skin. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when handling 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. Improper coating selection is the most common cause of magnet failure over time.

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

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

Flux value emitted by the magnet pole. Key data for generator builders and Hall effect devices. Permeance Coefficient defines the magnet operating point.

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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Vertical hold

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

2. Steel thickness impact

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

3. Power loss vs temp

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

Quick Unit Converter

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SM 18x200 [2xM5] / N42 - magnetic separator

442.80 ZŁ brutto / pcs

This product is a very strong cylindrical magnet, composed of modern NdFeB material, which, at dimensions of Ø5x15 mm, guarantees maximum efficiency. This specific item is characterized by high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 0.48 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Moreover, 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 modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the high power of 4.68 N with a weight of only 2.21 g, this cylindrical magnet is indispensable in electronics and wherever low weight is crucial.

Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most popular standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø5x15), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

The presented product is a neodymium magnet with precisely defined parameters: diameter 5 mm and height 15 mm. 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 secures it against oxidation, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 15 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 through the diameter if your project requires it.

Pros as well as cons of NdFeB magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:

They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
They possess excellent resistance to weakening of magnetic properties due to external fields,
Thanks to the smooth finish, the coating of Ni-Cu-Ni, gold, or silver gives an clean appearance,
Magnetic induction on the working part of the magnet remains extremely intense,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Considering the possibility of precise shaping and adaptation to custom needs, neodymium magnets can be modeled in a broad palette of geometric configurations, which increases their versatility,
Huge importance in modern industrial fields – they are commonly used in computer drives, motor assemblies, precision medical tools, also industrial machines.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which enables their usage in compact constructions

Weaknesses

Disadvantages of NdFeB magnets:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
We recommend casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex shapes.
Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these devices can disrupt the diagnostic process medical after entering the body.
With budget limitations the cost of neodymium magnets is economically unviable,

Holding force characteristics

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

Information about lifting capacity is the result of a measurement for the most favorable conditions, assuming:

using a plate made of high-permeability steel, serving as a magnetic yoke
whose thickness reaches at least 10 mm
with an ground touching surface
without any air gap between the magnet and steel
during detachment in a direction vertical to the plane
at ambient temperature room level

Impact of factors on magnetic holding capacity in practice

Please note that the working load will differ depending on elements below, starting with the most relevant:

Gap (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to varnish, corrosion or dirt).
Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Chemical composition of the base – mild steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal weaken the grip.
Heat – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate lowers the holding force.

H&S for magnets

Nickel coating and allergies

Medical facts indicate that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands or opt for coated magnets.

Handling rules

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

Heat sensitivity

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.

Finger safety

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

Cards and drives

Do not bring magnets near a wallet, computer, or TV. The magnetic field can destroy these devices and wipe information from cards.

Medical interference

For implant holders: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Risk of cracking

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. Wear goggles.

Danger to the youngest

Adult use only. Tiny parts can be swallowed, causing severe trauma. Store out of reach of kids and pets.

Compass and GPS

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

Do not drill into magnets

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.

Danger! Details about hazards in the article: Magnet Safety Guide.

MW 5x15 / N38 - cylindrical magnet

Want to negotiate?

MW 5x15 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the assembly - report

1. Vertical hold

2. Steel thickness impact

3. Power loss vs temp

Force (Pull)

Magnetic Induction

Other proposals

SMZR 32x100 / N52 - magnetic separator with handle

MPL 40x15x6 / N38 - lamellar magnet

MP 24x16x2 / N38 - ring magnet

SM 18x200 [2xM5] / N42 - magnetic separator

Pros as well as cons of NdFeB magnets.

Strengths

Weaknesses

Holding force characteristics

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

Impact of factors on magnetic holding capacity in practice

Nickel coating and allergies

Handling rules

Heat sensitivity

Finger safety

Cards and drives

Medical interference

Risk of cracking

Danger to the youngest

Compass and GPS

Do not drill into magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C