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MW 12x3 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010018

GTIN/EAN: 5906301810179

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

2.54 g

Magnetization Direction

↑ axial

Load capacity

2.49 kg / 24.43 N

Magnetic Induction

277.09 mT / 2771 Gs

Coating

[NiCuNi] Nickel

see technical data »

1.648 ZŁ with VAT / pcs + price for transport

1.340 ZŁ net + 23% VAT / pcs

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Technical of the product - MW 12x3 / N38 - cylindrical magnet

Specification / characteristics - MW 12x3 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010018
GTIN/EAN	5906301810179
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	12 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	2.54 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.49 kg / 24.43 N
Magnetic Induction ~ ?	277.09 mT / 2771 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x3 / 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

Engineering analysis of the product - data

Presented information represent the direct effect of a mathematical calculation. Values were calculated on models for the class Nd₂Fe₁₄B. Real-world conditions might slightly differ from theoretical values. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - interaction chart
MW 12x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2770 Gs 277.0 mT	2.49 kg / 5.49 lbs 2490.0 g / 24.4 N	warning
1 mm	2420 Gs 242.0 mT	1.90 kg / 4.19 lbs 1900.6 g / 18.6 N	low risk
2 mm	2009 Gs 200.9 mT	1.31 kg / 2.89 lbs 1309.4 g / 12.8 N	low risk
3 mm	1611 Gs 161.1 mT	0.84 kg / 1.86 lbs 842.7 g / 8.3 N	low risk
5 mm	991 Gs 99.1 mT	0.32 kg / 0.70 lbs 318.7 g / 3.1 N	low risk
10 mm	313 Gs 31.3 mT	0.03 kg / 0.07 lbs 31.8 g / 0.3 N	low risk
15 mm	125 Gs 12.5 mT	0.01 kg / 0.01 lbs 5.1 g / 0.0 N	low risk
20 mm	61 Gs 6.1 mT	0.00 kg / 0.00 lbs 1.2 g / 0.0 N	low risk
30 mm	20 Gs 2.0 mT	0.00 kg / 0.00 lbs 0.1 g / 0.0 N	low risk
50 mm	5 Gs 0.5 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	low risk

Grip strength weakens significantly per each millimeter of spacing. Remember that even a microscopic distance (e.g., contamination, paint, rust) noticeably reduces the pull force. Magnetic products work most effectively during direct contact; gap kills the power. Observe how quickly the parameters drop, when the product does not adhere flatly to the metal substrate. When planning the arrangement, eliminate additional spacers.

Table 2: Vertical force (wall)
MW 12x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.50 kg / 1.10 lbs 498.0 g / 4.9 N
1 mm	Stal (~0.2)	0.38 kg / 0.84 lbs 380.0 g / 3.7 N
2 mm	Stal (~0.2)	0.26 kg / 0.58 lbs 262.0 g / 2.6 N
3 mm	Stal (~0.2)	0.17 kg / 0.37 lbs 168.0 g / 1.6 N
5 mm	Stal (~0.2)	0.06 kg / 0.14 lbs 64.0 g / 0.6 N
10 mm	Stal (~0.2)	0.01 kg / 0.01 lbs 6.0 g / 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 2.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 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

The following data defines the theoretical holding capacity necessary to start the shifting of the magnet downwards on a upright steel wall (considering standard friction). This parameter depends on the gap size between the magnet and the surface.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 12x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.75 kg / 1.65 lbs 747.0 g / 7.3 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.50 kg / 1.10 lbs 498.0 g / 4.9 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.25 kg / 0.55 lbs 249.0 g / 2.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.25 kg / 2.74 lbs 1245.0 g / 12.2 N

When hanging a holder on a upright plane (e.g., a fridge), it will only hold just about 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient mean that magnets slide down faster than they pull off. Want to create a vertical fastening? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the magnet will give way down under a noticeably lighter cargo. Application of an anti-slip pad can significantly increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
MW 12x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.25 kg / 0.55 lbs 249.0 g / 2.4 N
1 mm	25%	0.62 kg / 1.37 lbs 622.5 g / 6.1 N
2 mm	50%	1.25 kg / 2.74 lbs 1245.0 g / 12.2 N
3 mm	75%	1.87 kg / 4.12 lbs 1867.5 g / 18.3 N
5 mm	100%	2.49 kg / 5.49 lbs 2490.0 g / 24.4 N
10 mm	100%	2.49 kg / 5.49 lbs 2490.0 g / 24.4 N
11 mm	100%	2.49 kg / 5.49 lbs 2490.0 g / 24.4 N
12 mm	100%	2.49 kg / 5.49 lbs 2490.0 g / 24.4 N

A thin sheet is incapable of absorb the full magnetic flux, which weakens actual performance of the holder. If you install a neodymium to a too thin substrate, the field will pass right through and the attraction force will be weaker. To squeeze full efficiency of this neodymium's potential, you need a suitably thick piece of metal. The saturation phenomenon causes that on thin elements (e.g., appliance housings), the holder holds weaker. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal resistance (material behavior) - power drop
MW 12x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.49 kg / 5.49 lbs 2490.0 g / 24.4 N	OK
40 °C	-2.2%	2.44 kg / 5.37 lbs 2435.2 g / 23.9 N	OK
60 °C	-4.4%	2.38 kg / 5.25 lbs 2380.4 g / 23.4 N
80 °C	-6.6%	2.33 kg / 5.13 lbs 2325.7 g / 22.8 N
100 °C	-28.8%	1.77 kg / 3.91 lbs 1772.9 g / 17.4 N

Ordinary NdFeB products change their properties power after exceeding the maximum temperature. Avoid high temperatures – heat can permanently destroy this magnet. As the temperature rises, the magnet's power briefly drops. Do not use this product in hot environments higher than its working range. Ignoring the limit will cause permanent loss of magnetic properties.

*Technical advisory: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low Pc) may lose charge permanently under lower heat stress than taller cylinders. The danger warning in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (repulsion) - field collision
MW 12x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	5.35 kg / 11.79 lbs 4 377 Gs	0.80 kg / 1.77 lbs 802 g / 7.9 N	N/A
1 mm	4.75 kg / 10.46 lbs 5 218 Gs	0.71 kg / 1.57 lbs 712 g / 7.0 N	4.27 kg / 9.42 lbs ~0 Gs
2 mm	4.08 kg / 9.00 lbs 4 840 Gs	0.61 kg / 1.35 lbs 612 g / 6.0 N	3.67 kg / 8.10 lbs ~0 Gs
3 mm	3.42 kg / 7.55 lbs 4 433 Gs	0.51 kg / 1.13 lbs 514 g / 5.0 N	3.08 kg / 6.80 lbs ~0 Gs
5 mm	2.27 kg / 5.01 lbs 3 610 Gs	0.34 kg / 0.75 lbs 341 g / 3.3 N	2.04 kg / 4.51 lbs ~0 Gs
10 mm	0.68 kg / 1.51 lbs 1 982 Gs	0.10 kg / 0.23 lbs 103 g / 1.0 N	0.62 kg / 1.36 lbs ~0 Gs
20 mm	0.07 kg / 0.15 lbs 626 Gs	0.01 kg / 0.02 lbs 10 g / 0.1 N	0.06 kg / 0.14 lbs ~0 Gs
50 mm	0.00 kg / 0.00 lbs 67 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
60 mm	0.00 kg / 0.00 lbs 41 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 27 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 18 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 13 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 10 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnets interact 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. Designing a powerful holder? Apply two magnets instead of one magnet and a steel. Remember that when attracting two neodymiums, the impact force is extreme. The levitation is a bit weaker than the connection force, but still impressive.
*Flux density in repulsion mode reaches ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Important: Results demonstrate sliding force of a pair of matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 12x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.0 cm
Hearing aid	10 Gs (1.0 mT)	4.0 cm
Mechanical watch	20 Gs (2.0 mT)	3.5 cm
Mobile device	40 Gs (4.0 mT)	2.5 cm
Remote	50 Gs (5.0 mT)	2.5 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 poses a real danger to IT equipment as well as pacemakers. These neodymiums produce a flux that disrupts operation of sensitive medical devices. Be aware: the unseen radiation penetrates the body and plastic. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Also at risk are: mechanical watches, car keys, speakers, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - warning
MW 12x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	31.83 km/h (8.84 m/s)	0.10 J
30 mm	54.69 km/h (15.19 m/s)	0.29 J
50 mm	70.61 km/h (19.61 m/s)	0.49 J
100 mm	99.85 km/h (27.74 m/s)	0.98 J

NdFeB products are prone to chipping – a strong collision with metal can result in shattering. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear safety glasses when working with large magnets.

Table 9: Corrosion resistance
MW 12x3 / 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 12x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	3 483 Mx	34.8 µWb
P_c Coefficient	0.35	Low (Flat)

Flux value emitted by the pole surface. Essential parameter in coil applications and motors. The P_c coefficient defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 12x3 / N38

Environment	Effective steel pull	Effect
Air (land)	2.49 kg	Standard
Water (riverbed)	2.85 kg (+0.36 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.

Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.

1. Shear force

*Warning: On a vertical wall, the magnet retains only ~20% of its perpendicular strength.

2. Efficiency vs thickness

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.35

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: 010018-2026

Magnet Unit Converter

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MW 5x4 / N38 - cylindrical magnet

0.369 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

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

11.91 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 9x3 / N38 - cylindrical magnet

1.132 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

AM szekla [M10] - magnetic accessories

4.92 ZŁ brutto / pcs

The presented product is an incredibly powerful rod magnet, composed of durable NdFeB material, which, with dimensions of Ø12x3 mm, guarantees optimal power. This specific item is characterized by high dimensional repeatability and industrial build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 2.49 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is ideal for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 24.43 N with a weight of only 2.54 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.

Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø12x3), 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 Ø12x3 mm, which, at a weight of 2.54 g, makes it an element with impressive magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 2.49 kg (force ~24.43 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it 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 12 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 through the diameter if your project requires it.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:

They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
Neodymium magnets prove to be exceptionally resistant to magnetic field loss caused by external magnetic fields,
By applying a reflective coating of nickel, the element acquires an modern look,
Magnetic induction on the working layer of the magnet is exceptional,
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...
In view of the potential of accurate shaping and customization to specialized needs, NdFeB magnets can be produced in a wide range of shapes and sizes, which expands the range of possible applications,
Fundamental importance in electronics industry – they are used in data components, drive modules, medical equipment, and technologically advanced constructions.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Limitations

Problematic aspects of neodymium magnets: weaknesses and usage proposals

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only secures them against impacts but also raises their durability
NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and 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
They rust in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
We recommend a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated forms.
Health risk related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical when they are in the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Maximum magnetic pulling force – what contributes to it?

Breakaway force was defined for optimal configuration, including:

with the contact of a yoke made of special test steel, ensuring maximum field concentration
with a thickness no less than 10 mm
with an ideally smooth touching surface
under conditions of no distance (metal-to-metal)
during pulling in a direction vertical to the mounting surface
at temperature room level

Magnet lifting force in use – key factors

Holding efficiency is influenced by specific conditions, such as (from most important):

Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
Metal type – not every steel attracts identically. Alloy additives weaken the attraction effect.
Surface quality – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
Temperature influence – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Precautions when working with neodymium magnets

Do not underestimate power

Be careful. Rare earth magnets act from a distance and connect with huge force, often quicker than you can move away.

Finger safety

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

Cards and drives

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

Warning for heart patients

For implant holders: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to handle the magnets.

Combustion hazard

Powder produced during grinding of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

This is not a toy

NdFeB magnets are not toys. Accidental ingestion of a few magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.

Impact on smartphones

GPS units and smartphones are extremely susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Sensitization to coating

A percentage of the population have a contact allergy to Ni, which is the standard coating for neodymium magnets. Extended handling may cause skin redness. We strongly advise wear protective gloves.

Beware of splinters

Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Heat sensitivity

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

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

MW 12x3 / N38 - cylindrical magnet

Technical of the product - MW 12x3 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - data

Table 1: Static force (pull vs distance) - interaction chart MW 12x3 / N38

Table 2: Vertical force (wall) MW 12x3 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MW 12x3 / N38

Table 4: Material efficiency (substrate influence) - power losses MW 12x3 / N38

Table 5: Thermal resistance (material behavior) - power drop MW 12x3 / N38

Table 6: Two magnets (repulsion) - field collision MW 12x3 / N38

Table 7: Safety (HSE) (implants) - precautionary measures MW 12x3 / N38

Table 8: Impact energy (cracking risk) - warning MW 12x3 / N38

Table 9: Corrosion resistance MW 12x3 / N38

Table 10: Electrical data (Pc) MW 12x3 / N38

Table 11: Underwater work (magnet fishing) MW 12x3 / N38

1. Shear force

2. Efficiency vs thickness

3. Power loss vs temp

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

Elemental analysis

Environmental data

Pulling force

Field Strength

See also proposals

MW 5x4 / N38 - cylindrical magnet

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

MW 9x3 / N38 - cylindrical magnet

AM szekla [M10] - magnetic accessories

Pros as well as cons of Nd2Fe14B magnets.

Pros

Limitations

Lifting parameters

Maximum magnetic pulling force – what contributes to it?

Magnet lifting force in use – key factors

Precautions when working with neodymium magnets

Do not underestimate power

Finger safety

Cards and drives

Warning for heart patients

Combustion hazard

This is not a toy

Impact on smartphones

Sensitization to coating

Beware of splinters

Heat sensitivity

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - interaction chart
MW 12x3 / N38

Table 2: Vertical force (wall)
MW 12x3 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 12x3 / N38

Table 4: Material efficiency (substrate influence) - power losses
MW 12x3 / N38

Table 5: Thermal resistance (material behavior) - power drop
MW 12x3 / N38

Table 6: Two magnets (repulsion) - field collision
MW 12x3 / N38

Table 7: Safety (HSE) (implants) - precautionary measures
MW 12x3 / N38

Table 8: Impact energy (cracking risk) - warning
MW 12x3 / N38

Table 9: Corrosion resistance
MW 12x3 / N38

Table 10: Electrical data (P_c)
MW 12x3 / N38

Table 11: Underwater work (magnet fishing)
MW 12x3 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.