Product available Ships tomorrow

MW 12x4 / 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
Rating: 5

cylindrical magnet

Catalog no 010019

GTIN/EAN: 5906301810186

5.00

Diameter Ø

12 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

3.39 g

Magnetization Direction

↑ axial

Load capacity

3.45 kg / 33.81 N

Magnetic Induction

343.64 mT / 3436 Gs

Coating

[NiCuNi] Nickel

product parameters »

1.353 ZŁ with VAT / pcs + price for transport

1.100 ZŁ net + 23% VAT / pcs

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Detailed specification - MW 12x4 / N38 - cylindrical magnet

Specification / characteristics - MW 12x4 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010019
GTIN/EAN	5906301810186
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	4 mm [±0,1 mm]
Weight	3.39 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.45 kg / 33.81 N
Magnetic Induction ~ ?	343.64 mT / 3436 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 12x4 / 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 simulation of the magnet - data

Presented information constitute the direct effect of a mathematical calculation. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Operational conditions may deviate from the simulation results. Use these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs distance) - characteristics
MW 12x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3435 Gs 343.5 mT	3.45 kg / 7.61 LBS 3450.0 g / 33.8 N	medium risk
1 mm	2950 Gs 295.0 mT	2.54 kg / 5.61 LBS 2544.7 g / 25.0 N	medium risk
2 mm	2423 Gs 242.3 mT	1.72 kg / 3.79 LBS 1717.5 g / 16.8 N	low risk
3 mm	1935 Gs 193.5 mT	1.09 kg / 2.41 LBS 1094.6 g / 10.7 N	low risk
5 mm	1190 Gs 119.0 mT	0.41 kg / 0.91 LBS 413.8 g / 4.1 N	low risk
10 mm	382 Gs 38.2 mT	0.04 kg / 0.09 LBS 42.7 g / 0.4 N	low risk
15 mm	156 Gs 15.6 mT	0.01 kg / 0.02 LBS 7.1 g / 0.1 N	low risk
20 mm	76 Gs 7.6 mT	0.00 kg / 0.00 LBS 1.7 g / 0.0 N	low risk
30 mm	26 Gs 2.6 mT	0.00 kg / 0.00 LBS 0.2 g / 0.0 N	low risk
50 mm	6 Gs 0.6 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	low risk

Magnetic force weakens significantly with every subsequent millimeter of gap. Remember that even a very thin break (e.g., dirt, paint, rust) noticeably weakens the grip. Neodymiums work strongest at the point of direct contact; air break weakens the power. Notice how quickly the parameters fall, when the product does not touch directly to the steel surface. When designing the assembly, avoid unnecessary gaps.

Table 2: Shear force (vertical surface)
MW 12x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.69 kg / 1.52 LBS 690.0 g / 6.8 N
1 mm	Stal (~0.2)	0.51 kg / 1.12 LBS 508.0 g / 5.0 N
2 mm	Stal (~0.2)	0.34 kg / 0.76 LBS 344.0 g / 3.4 N
3 mm	Stal (~0.2)	0.22 kg / 0.48 LBS 218.0 g / 2.1 N
5 mm	Stal (~0.2)	0.08 kg / 0.18 LBS 82.0 g / 0.8 N
10 mm	Stal (~0.2)	0.01 kg / 0.02 LBS 8.0 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 table below indicates the theoretical holding capacity required to start the downward movement of the magnet downwards along a vertical steel wall (assuming typical friction coefficient). This parameter is a function of the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 12x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.04 kg / 2.28 LBS 1035.0 g / 10.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.69 kg / 1.52 LBS 690.0 g / 6.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.35 kg / 0.76 LBS 345.0 g / 3.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.73 kg / 3.80 LBS 1725.0 g / 16.9 N

When mounting a magnet on a vertical surface (e.g., a car body), it will only hold barely approx. 1/5 of its maximum pull force. Gravity and a weak degree of grip mean that holders move down easier than they detach. Designing a vertical fastening? Note that the shear force is much weaker than the maximum static pull force. On a smooth steel, the magnet will give way down under a much lighter cargo. Using a rubber coating can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MW 12x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.35 kg / 0.76 LBS 345.0 g / 3.4 N
1 mm	25%	0.86 kg / 1.90 LBS 862.5 g / 8.5 N
2 mm	50%	1.73 kg / 3.80 LBS 1725.0 g / 16.9 N
3 mm	75%	2.59 kg / 5.70 LBS 2587.5 g / 25.4 N
5 mm	100%	3.45 kg / 7.61 LBS 3450.0 g / 33.8 N
10 mm	100%	3.45 kg / 7.61 LBS 3450.0 g / 33.8 N
11 mm	100%	3.45 kg / 7.61 LBS 3450.0 g / 33.8 N
12 mm	100%	3.45 kg / 7.61 LBS 3450.0 g / 33.8 N

A too thin steel is not enough to absorb the full magnetic flux, which wastes potential of the magnet. If you install a neodymium to a thin surface, the flux will pass right through and the attraction force will be weaker. To squeeze full efficiency of this neodymium's power, you require a sufficiently solid backing of metal. The saturation phenomenon means that on delicate walls (e.g., appliance housings), the holder holds weaker. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - resistance threshold
MW 12x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.45 kg / 7.61 LBS 3450.0 g / 33.8 N	OK
40 °C	-2.2%	3.37 kg / 7.44 LBS 3374.1 g / 33.1 N	OK
60 °C	-4.4%	3.30 kg / 7.27 LBS 3298.2 g / 32.4 N
80 °C	-6.6%	3.22 kg / 7.10 LBS 3222.3 g / 31.6 N
100 °C	-28.8%	2.46 kg / 5.42 LBS 2456.4 g / 24.1 N

Standard neodymium magnets irreversibly lose parameters after exceeding the maximum temperature. Protect against heat – excessive heat can permanently demagnetize this magnet. As the temperature rises, the magnet's force briefly drops. Do not use this magnet in hot environments higher than its operating temperature limit. Exceeding the critical threshold will lead to destruction of magnetic properties.

*Technical advisory: Thermal stability is determined by both grade, but also on the magnet's shape. Thin magnets (pancake types) may lose charge permanently at lower temperatures compared to rod magnets. Red status in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 12x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	8.23 kg / 18.13 LBS 4 952 Gs	1.23 kg / 2.72 LBS 1234 g / 12.1 N	N/A
1 mm	7.16 kg / 15.79 LBS 6 410 Gs	1.07 kg / 2.37 LBS 1074 g / 10.5 N	6.45 kg / 14.21 LBS ~0 Gs
2 mm	6.07 kg / 13.38 LBS 5 900 Gs	0.91 kg / 2.01 LBS 910 g / 8.9 N	5.46 kg / 12.04 LBS ~0 Gs
3 mm	5.03 kg / 11.09 LBS 5 372 Gs	0.75 kg / 1.66 LBS 754 g / 7.4 N	4.53 kg / 9.98 LBS ~0 Gs
5 mm	3.29 kg / 7.25 LBS 4 342 Gs	0.49 kg / 1.09 LBS 493 g / 4.8 N	2.96 kg / 6.52 LBS ~0 Gs
10 mm	0.99 kg / 2.18 LBS 2 379 Gs	0.15 kg / 0.33 LBS 148 g / 1.5 N	0.89 kg / 1.96 LBS ~0 Gs
20 mm	0.10 kg / 0.22 LBS 764 Gs	0.02 kg / 0.03 LBS 15 g / 0.1 N	0.09 kg / 0.20 LBS ~0 Gs
50 mm	0.00 kg / 0.00 LBS 85 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 52 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 34 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 23 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 17 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 12 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 much further distance than a magnet and sheet combination. Such a system of magnet-to-magnet creates a more powerful interaction and a larger range of performance. Designing a strong closure? Apply two magnets instead of one magnet and a steel. Exercise caution that when attracting two neodymiums, the pinch force is huge. The levitation is marginally weaker than the connection force, but still significant.
*The magnetic induction between like poles reaches ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Note: Figures refer to sliding force of dual matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MW 12x4 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.5 cm
Hearing aid	10 Gs (1.0 mT)	4.5 cm
Mechanical watch	20 Gs (2.0 mT)	3.5 cm
Mobile device	40 Gs (4.0 mT)	3.0 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

A strong magnetic field is a large risk to IT equipment as well as pacemakers. These magnets generate a field that destroys function of digital equipment. Remember: the unseen radiation passes through tissues and glass. Increased vigilance must be taken by people with hearing aids and insulin pumps. Influence will be felt by: 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) - collision effects
MW 12x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	32.42 km/h (9.01 m/s)	0.14 J
30 mm	55.73 km/h (15.48 m/s)	0.41 J
50 mm	71.94 km/h (19.98 m/s)	0.68 J
100 mm	101.74 km/h (28.26 m/s)	1.35 J

Magnetic elements are prone to chipping – a collision with steel can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Impact energy can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during bringing near metal so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Surface protection spec
MW 12x4 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

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

Table 10: Construction data (Flux)
MW 12x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 114 Mx	41.1 µWb
P_c Coefficient	0.44	Low (Flat)

Flux value emitted by the magnet pole. Essential parameter when building generators as well as sensors. P_c value defines the magnet's operating point.

Table 11: Physics of underwater searching
MW 12x4 / N38

Environment	Effective steel pull	Effect
Air (land)	3.45 kg	Standard
Water (riverbed)	3.95 kg (+0.50 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. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Steel thickness impact

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

3. Thermal stability

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.44

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 specification and ecology

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: 010019-2026

Magnet Unit Converter

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Kilograms (kg)

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0.541 ZŁ brutto / pcs

The presented product is an extremely powerful cylinder magnet, manufactured from advanced NdFeB material, which, with dimensions of Ø12x4 mm, guarantees optimal power. This specific item boasts high dimensional repeatability and professional build quality, making it an ideal solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 3.45 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is ideal for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 33.81 N with a weight of only 3.39 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.

Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this precision component. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Magnets NdFeB grade N38 are strong enough for 90% of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø12x4), 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 Ø12x4 mm, which, at a weight of 3.39 g, makes it an element with high magnetic energy density. The value of 33.81 N means that the magnet is capable of holding a weight many times exceeding its own mass of 3.39 g. The product has a [NiCuNi] coating, which protects the surface against external factors, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 4 mm), which means that the N and S poles are located on the flat, circular surfaces. 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.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Benefits

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

Their magnetic field remains stable, and after around 10 years it drops only by ~1% (theoretically),
Neodymium magnets are exceptionally resistant to magnetic field loss caused by external magnetic fields,
Thanks to the glossy finish, the plating of Ni-Cu-Ni, gold, or silver gives an clean appearance,
Neodymium magnets create maximum magnetic induction on a contact point, which allows for strong attraction,
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 accurate forming and optimizing to precise applications,
Versatile presence in modern technologies – they serve a role in magnetic memories, drive modules, medical devices, and multitasking production systems.
Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of neodymium magnets:

Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets suffer a drop in power. 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
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
We suggest a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex forms.
Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that small elements 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 can limit application in large quantities

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Breakaway force is the result of a measurement for ideal contact conditions, assuming:

with the contact of a yoke made of low-carbon steel, guaranteeing maximum field concentration
possessing a thickness of at least 10 mm to ensure full flux closure
characterized by smoothness
under conditions of ideal adhesion (surface-to-surface)
during detachment in a direction perpendicular to the mounting surface
at temperature room level

Determinants of practical lifting force of a magnet

During everyday use, the actual lifting capacity is determined by many variables, presented from the most important:

Distance (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Base massiveness – too thin plate does not close the flux, causing part of the power to be wasted into the air.
Material composition – different alloys attracts identically. High carbon content worsen the attraction effect.
Smoothness – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet and the plate lowers the lifting capacity.

H&S for magnets

Fire risk

Dust created during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Handling guide

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Compass and GPS

Navigation devices and mobile phones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Serious injuries

Mind your fingers. Two powerful magnets will join instantly with a force of massive weight, destroying everything in their path. Be careful!

Risk of cracking

Despite the nickel coating, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Allergic reactions

Certain individuals experience a hypersensitivity to nickel, which is the standard coating for neodymium magnets. Extended handling can result in dermatitis. We strongly advise use safety gloves.

Threat to electronics

Equipment safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Thermal limits

Watch the temperature. Heating the magnet to high heat will destroy its properties and strength.

Adults only

NdFeB magnets are not toys. Swallowing a few magnets can lead to them pinching intestinal walls, which poses a critical condition and requires immediate surgery.

Danger to pacemakers

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Safety First! Want to know more? Read our article: Why are neodymium magnets dangerous?

MW 12x4 / N38 - cylindrical magnet

Detailed specification - MW 12x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the magnet - data

Table 1: Static force (pull vs distance) - characteristics MW 12x4 / N38

Table 2: Shear force (vertical surface) MW 12x4 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MW 12x4 / N38

Table 4: Steel thickness (substrate influence) - power losses MW 12x4 / N38

Table 5: Thermal stability (stability) - resistance threshold MW 12x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MW 12x4 / N38

Table 7: Protective zones (implants) - warnings MW 12x4 / N38

Table 8: Impact energy (kinetic energy) - collision effects MW 12x4 / N38

Table 9: Surface protection spec MW 12x4 / N38

Table 10: Construction data (Flux) MW 12x4 / N38

Table 11: Physics of underwater searching MW 12x4 / N38

1. Sliding resistance

2. Steel thickness impact

3. Thermal stability

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

Material specification

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

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Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Cons

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Determinants of practical lifting force of a magnet

H&S for magnets

Fire risk

Handling guide

Compass and GPS

Serious injuries

Risk of cracking

Allergic reactions

Threat to electronics

Thermal limits

Adults only

Danger to pacemakers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - characteristics
MW 12x4 / N38

Table 2: Shear force (vertical surface)
MW 12x4 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MW 12x4 / N38

Table 4: Steel thickness (substrate influence) - power losses
MW 12x4 / N38

Table 5: Thermal stability (stability) - resistance threshold
MW 12x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 12x4 / N38

Table 7: Protective zones (implants) - warnings
MW 12x4 / N38

Table 8: Impact energy (kinetic energy) - collision effects
MW 12x4 / N38

Table 9: Surface protection spec
MW 12x4 / N38

Table 10: Construction data (Flux)
MW 12x4 / N38

Table 11: Physics of underwater searching
MW 12x4 / N38

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.