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MW 15x3 / 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 010029

GTIN/EAN: 5906301810285

5.00

Load capacity 2.87 kg / 28.14 N Magnetic Induction 230.16 mT / 2302 Gs

Diameter Ø: 15 mm [±0,1 mm]
Height: 3 mm [±0,1 mm]
Weight: 3.98 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see technical data »

1.320 zł net / pcs

1.624 zł with VAT (23% VAT) / pcs

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Frequently asked questions

What is the maximum working temperature of a disc magnet?

Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.

What is the difference between N38, N42 and N52?

The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.

What is the dimensional tolerance?

±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

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

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Physical properties - MW 15x3 / N38 - cylindrical magnet

Specification / characteristics - MW 15x3 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010029
GTIN/EAN	5906301810285
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	3 mm [±0,1 mm]
Weight	3.98 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.87 kg / 28.14 N
Magnetic Induction ~ ?	230.16 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 15x3 / 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	310	°C
Curie Temperature TF	590	°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

Engineering analysis of the magnet - technical parameters

The following values are the outcome of a physical calculation. Values were calculated on models for the material Nd₂Fe₁₄B. Real-world parameters might slightly deviate from the simulation results. Please consider these data as a reference point when designing systems.

Table 1: Static force (pull vs distance) - characteristics
MW 15x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2301 Gs 230.1 mT	2.87 kg / 6.33 pounds 2870.0 g / 28.2 N	strong
1 mm	2098 Gs 209.8 mT	2.39 kg / 5.26 pounds 2386.5 g / 23.4 N	strong
2 mm	1842 Gs 184.2 mT	1.84 kg / 4.05 pounds 1838.5 g / 18.0 N	safe
3 mm	1570 Gs 157.0 mT	1.34 kg / 2.95 pounds 1337.0 g / 13.1 N	safe
5 mm	1084 Gs 108.4 mT	0.64 kg / 1.40 pounds 637.0 g / 6.2 N	safe
10 mm	410 Gs 41.0 mT	0.09 kg / 0.20 pounds 91.3 g / 0.9 N	safe
15 mm	178 Gs 17.8 mT	0.02 kg / 0.04 pounds 17.1 g / 0.2 N	safe
20 mm	89 Gs 8.9 mT	0.00 kg / 0.01 pounds 4.3 g / 0.0 N	safe
30 mm	31 Gs 3.1 mT	0.00 kg / 0.00 pounds 0.5 g / 0.0 N	safe
50 mm	7 Gs 0.7 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe

Magnetic force drops sharply with every mm of distance. Keep in mind that even the smallest gap (e.g., dirt, paint, rust) significantly weakens the grip. Magnetic products work most effectively in perfect adhesion; gap nullifies the power. Analyze how rapidly the parameters plummet, when the magnet does not touch directly to the steel surface. When designing the mounting, eliminate unnecessary gaps.

Table 2: Sliding load (wall)
MW 15x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.57 kg / 1.27 pounds 574.0 g / 5.6 N
1 mm	Stal (~0.2)	0.48 kg / 1.05 pounds 478.0 g / 4.7 N
2 mm	Stal (~0.2)	0.37 kg / 0.81 pounds 368.0 g / 3.6 N
3 mm	Stal (~0.2)	0.27 kg / 0.59 pounds 268.0 g / 2.6 N
5 mm	Stal (~0.2)	0.13 kg / 0.28 pounds 128.0 g / 1.3 N
10 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 18.0 g / 0.2 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 0.0 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

The following data indicates the approximate shear load required to start the downward movement of the magnet down along a vertical steel wall (considering typical friction coefficient). This value is relative to the distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MW 15x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.86 kg / 1.90 pounds 861.0 g / 8.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.57 kg / 1.27 pounds 574.0 g / 5.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.29 kg / 0.63 pounds 287.0 g / 2.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.44 kg / 3.16 pounds 1435.0 g / 14.1 N

When placing a holder on a vertical plane (e.g., a car body), it you can count on only about 20%-30% of its nominal power. Gravity as well as a low friction coefficient mean that products slip faster than they pop off the substrate. Designing a hanger? Note that the sliding force is much weaker than the maximum static pull force. On a painted metal, the magnet will slide down under a much lighter load. Utilizing a rubberized pad can significantly raise the stability.

Table 4: Material efficiency (saturation) - sheet metal selection
MW 15x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.29 kg / 0.63 pounds 287.0 g / 2.8 N
1 mm	25%	0.72 kg / 1.58 pounds 717.5 g / 7.0 N
2 mm	50%	1.44 kg / 3.16 pounds 1435.0 g / 14.1 N
3 mm	75%	2.15 kg / 4.75 pounds 2152.5 g / 21.1 N
5 mm	100%	2.87 kg / 6.33 pounds 2870.0 g / 28.2 N
10 mm	100%	2.87 kg / 6.33 pounds 2870.0 g / 28.2 N
11 mm	100%	2.87 kg / 6.33 pounds 2870.0 g / 28.2 N
12 mm	100%	2.87 kg / 6.33 pounds 2870.0 g / 28.2 N

A thin metal plate is incapable of focus the entire magnetic field, which weakens actual performance of the magnet. If you install a neodymium to a weak sheet, the flux will pass right through and the attraction force will be weaker. To achieve 100% of this neodymium's power, you require a sufficiently solid piece of steel. The material oversaturation causes that on delicate walls (e.g., thin profiles), the magnet holds weaker. We suggest choosing the steel thickness according to the table below.

Table 5: Working in heat (material behavior) - thermal limit
MW 15x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.87 kg / 6.33 pounds 2870.0 g / 28.2 N	OK
40 °C	-2.2%	2.81 kg / 6.19 pounds 2806.9 g / 27.5 N	OK
60 °C	-4.4%	2.74 kg / 6.05 pounds 2743.7 g / 26.9 N
80 °C	-6.6%	2.68 kg / 5.91 pounds 2680.6 g / 26.3 N
100 °C	-28.8%	2.04 kg / 4.51 pounds 2043.4 g / 20.0 N

Ordinary NdFeB products change their properties strength after exceeding the maximum temperature. Watch out for overheating – high temperature can permanently destroy this magnet. As the temperature rises, the neodymium's capacity briefly decreases. Avoid using this magnet close to heaters exceeding its working range. Ignoring the limit will lead to irreversible degradation of magnetism.

*Important note: Thermal stability is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) may lose charge permanently sooner than long magnets. Red status in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MW 15x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	5.77 kg / 12.72 pounds 3 869 Gs	0.87 kg / 1.91 pounds 865 g / 8.5 N	N/A
1 mm	5.32 kg / 11.73 pounds 4 419 Gs	0.80 kg / 1.76 pounds 798 g / 7.8 N	4.79 kg / 10.55 pounds ~0 Gs
2 mm	4.80 kg / 10.57 pounds 4 196 Gs	0.72 kg / 1.59 pounds 719 g / 7.1 N	4.32 kg / 9.52 pounds ~0 Gs
3 mm	4.25 kg / 9.36 pounds 3 948 Gs	0.64 kg / 1.40 pounds 637 g / 6.2 N	3.82 kg / 8.42 pounds ~0 Gs
5 mm	3.17 kg / 6.99 pounds 3 412 Gs	0.48 kg / 1.05 pounds 476 g / 4.7 N	2.85 kg / 6.29 pounds ~0 Gs
10 mm	1.28 kg / 2.82 pounds 2 168 Gs	0.19 kg / 0.42 pounds 192 g / 1.9 N	1.15 kg / 2.54 pounds ~0 Gs
20 mm	0.18 kg / 0.40 pounds 821 Gs	0.03 kg / 0.06 pounds 28 g / 0.3 N	0.17 kg / 0.36 pounds ~0 Gs
50 mm	0.00 kg / 0.01 pounds 101 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.00 pounds 62 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 41 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 28 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 20 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 15 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnetic products interact from a much further distance than a neodymium and metal combination. The connection of two magnets creates a more powerful interaction and a larger range of action. Want to build a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when bringing together two magnets, the pinch force is extreme. The levitation is slightly lower than the connection force, but still impressive.
*Flux density in repulsion mode drops to ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Note: Calculations apply to friction force of two matching neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - precautionary measures
MW 15x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.0 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

Extremely neodym field is a large risk to IT equipment and pacemakers. These neodymiums produce a flux that prevents correct functioning of digital equipment. Remember: the unseen radiation acts through matter and housings. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - collision effects
MW 15x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	24.80 km/h (6.89 m/s)	0.09 J
30 mm	25.16 km/h (6.99 m/s)	0.10 J
50 mm	25.16 km/h (6.99 m/s)	0.10 J
100 mm	25.16 km/h (6.99 m/s)	0.10 J

NdFeB products are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Impact energy can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when working with powerful specimens.

Table 9: Corrosion resistance
MW 15x3 / 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. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MW 15x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 718 Mx	47.2 µWb
P_c Coefficient	0.29	Low (Flat)

Flux value emitted by the pole surface. Key data for generator designers as well as sensors. P_c value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 15x3 / N38

Environment	Effective steel pull	Effect
Air (land)	2.87 kg	Standard
Water (riverbed)	3.29 kg (+0.42 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!

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

1. Vertical hold

*Caution: On a vertical wall, the magnet retains merely ~20% of its max power.

2. Plate thickness effect

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

3. Power loss vs temp

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.29

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.

Technical and environmental data

Chemical composition

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: 010029-2026

Measurement Calculator

Force (pull)

Force in kg

Force (N)

Pounds (lbs)

Magnetic Induction

Induction (Gs)

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The presented product is an incredibly powerful cylindrical magnet, composed of advanced NdFeB material, which, with dimensions of Ø15x3 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 2.87 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 28.14 N with a weight of only 3.98 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 15.1 mm) using epoxy glues. 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 NdFeB grade 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 (Ø15x3), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

This model is characterized by dimensions Ø15x3 mm, which, at a weight of 3.98 g, makes it an element with impressive magnetic energy density. The value of 28.14 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.98 g. The product has a [NiCuNi] coating, which secures it 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. 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

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They have unchanged lifting capacity, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
They maintain their magnetic properties even under external field action,
By covering with a lustrous coating of gold, the element presents an nice look,
The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
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...
Considering the possibility of precise forming and customization to unique requirements, NdFeB magnets can be created in a wide range of forms and dimensions, which expands the range of possible applications,
Wide application in high-tech industry – they are utilized in mass storage devices, electromotive mechanisms, diagnostic systems, also other advanced devices.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in small systems

Limitations

Disadvantages of neodymium magnets:

They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
Due to limitations in creating threads and complex shapes in magnets, we propose using casing - magnetic mount.
Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to be problematic in diagnostics medical in case of swallowing.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Highest magnetic holding force – what contributes to it?

Breakaway force is the result of a measurement for the most favorable conditions, including:

with the use of a yoke made of low-carbon steel, guaranteeing maximum field concentration
possessing a massiveness of minimum 10 mm to ensure full flux closure
with a plane free of scratches
under conditions of gap-free contact (surface-to-surface)
under axial force vector (90-degree angle)
at temperature room level

Lifting capacity in real conditions – factors

During everyday use, the actual holding force is determined by several key aspects, presented from the most important:

Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
Thermal environment – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.

H&S for magnets

This is not a toy

Adult use only. Tiny parts can be swallowed, causing serious injuries. Keep away from kids and pets.

GPS Danger

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

Fragile material

Beware of splinters. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.

Sensitization to coating

Studies show that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from direct skin contact or opt for coated magnets.

Flammability

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

Handling rules

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Do not overheat magnets

Avoid heat. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Safe distance

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

Serious injuries

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Warning for heart patients

People with a pacemaker have to keep an large gap from magnets. The magnetism can stop the operation of the implant.

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

MW 15x3 / N38 - cylindrical magnet

Physical properties - MW 15x3 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the magnet - technical parameters

Table 1: Static force (pull vs distance) - characteristics MW 15x3 / N38

Table 2: Sliding load (wall) MW 15x3 / N38

Table 3: Vertical assembly (sliding) - vertical pull MW 15x3 / N38

Table 4: Material efficiency (saturation) - sheet metal selection MW 15x3 / N38

Table 5: Working in heat (material behavior) - thermal limit MW 15x3 / N38

Table 6: Two magnets (attraction) - forces in the system MW 15x3 / N38

Table 7: Hazards (electronics) - precautionary measures MW 15x3 / N38

Table 8: Collisions (kinetic energy) - collision effects MW 15x3 / N38

Table 9: Corrosion resistance MW 15x3 / N38

Table 10: Electrical data (Pc) MW 15x3 / N38

Table 11: Hydrostatics and buoyancy MW 15x3 / N38

1. Vertical hold

2. Plate thickness effect

3. Power loss vs temp

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

Chemical composition

Environmental data

Force (pull)

Magnetic Induction

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UMH 48x11x65 [M6] / N38 - magnetic holder with hook

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Limitations

Holding force characteristics

Highest magnetic holding force – what contributes to it?

Lifting capacity in real conditions – factors

H&S for magnets

This is not a toy

GPS Danger

Fragile material

Sensitization to coating

Flammability

Handling rules

Do not overheat magnets

Safe distance

Serious injuries

Warning for heart patients

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - characteristics
MW 15x3 / N38

Table 2: Sliding load (wall)
MW 15x3 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MW 15x3 / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MW 15x3 / N38

Table 5: Working in heat (material behavior) - thermal limit
MW 15x3 / N38

Table 6: Two magnets (attraction) - forces in the system
MW 15x3 / N38

Table 7: Hazards (electronics) - precautionary measures
MW 15x3 / N38

Table 8: Collisions (kinetic energy) - collision effects
MW 15x3 / N38

Table 9: Corrosion resistance
MW 15x3 / N38

Table 10: Electrical data (P_c)
MW 15x3 / N38

Table 11: Hydrostatics and buoyancy
MW 15x3 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.