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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

see parameters »

1.353 ZŁ with VAT / pcs + price for transport

1.100 ZŁ net + 23% VAT / pcs

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Physical properties - 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 analysis of the product - report

The following values represent the result of a engineering analysis. Results were calculated on models for the class Nd₂Fe₁₄B. Operational parameters might slightly differ from theoretical values. Please consider these calculations as a supplementary guide when designing systems.

Table 1: Static pull force (force vs gap) - 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	warning
1 mm	2950 Gs 295.0 mT	2.54 kg / 5.61 lbs 2544.7 g / 25.0 N	warning
2 mm	2423 Gs 242.3 mT	1.72 kg / 3.79 lbs 1717.5 g / 16.8 N	weak grip
3 mm	1935 Gs 193.5 mT	1.09 kg / 2.41 lbs 1094.6 g / 10.7 N	weak grip
5 mm	1190 Gs 119.0 mT	0.41 kg / 0.91 lbs 413.8 g / 4.1 N	weak grip
10 mm	382 Gs 38.2 mT	0.04 kg / 0.09 lbs 42.7 g / 0.4 N	weak grip
15 mm	156 Gs 15.6 mT	0.01 kg / 0.02 lbs 7.1 g / 0.1 N	weak grip
20 mm	76 Gs 7.6 mT	0.00 kg / 0.00 lbs 1.7 g / 0.0 N	weak grip
30 mm	26 Gs 2.6 mT	0.00 kg / 0.00 lbs 0.2 g / 0.0 N	weak grip
50 mm	6 Gs 0.6 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	weak grip

Magnetic force decreases significantly per each millimeter of gap. Note that every additional insulation layer (e.g., dirt, paint, rust) noticeably diminishes the holding power. Magnetic products work most effectively during direct contact; distance weakens the power. See how rapidly the pull force drop, when the product does not touch directly to the steel surface. When planning the arrangement, discard unnecessary gaps.

Table 2: Slippage hold (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

This section shows the estimated holding capacity needed to initiate the shifting of the magnet down against a upright metal surface (considering typical friction coefficient). This value is a function of the gap size between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
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 placing a magnet on a upright wall (e.g., a board), it you can count on only about 1/5 of nominal attraction strength. Gravity and a weak degree of grip cause that products slip easier than they pull off. Want to create a wall mount? Consider that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the magnet will slide down under a much lighter cargo. Application of an anti-slip coating can significantly increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
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 thin sheet is incapable of conduct the entire magnetic field, which wastes potential of the holder. Should you mount a strong magnet to a thin surface, the magnetism will pass right through and the holding will be smaller. To utilize the maximum of this magnet's power, you need a suitably thick piece of metal. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the magnet works worse. We recommend selecting the steel dimension according to the table below.

Table 5: Thermal resistance (stability) - thermal limit
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

Ordinary NdFeB products change their properties power above the temperature limit. Avoid high temperatures – high temperature can permanently destroy this magnet. With increasing heat, the neodymium's power momentarily lowers. Refrain from using this magnet close to ovens exceeding its operating temperature limit. Exceeding the critical threshold will result in irreversible degradation of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) may lose charge permanently under lower heat stress compared to rod magnets. Warning indicator in the table signals permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - forces in the system
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 attract each other from a wider radius than a magnet and sheet combination. The connection of two magnets produces a massive flux and a larger range of operation. Designing a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is extreme. The levitation is a bit weaker than the attraction, but still significant.
*Field value between like poles reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Note: Results refer to friction force of two same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (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
Timepiece	20 Gs (2.0 mT)	3.5 cm
Mobile device	40 Gs (4.0 mT)	3.0 cm
Car key	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 poses a serious hazard to IT equipment as well as medical implants. These neodymiums generate a field that destroys function of digital equipment. Remember: the invisible magnetic field penetrates the body and glass. Increased vigilance must be taken by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
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 delicate – a violent impact against metal can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or painful pinches to skin. Always hold the magnet during bringing near metal so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Use safety goggles 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (P_c)
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. The P_c coefficient determines the working geometry.

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%

Rust risk: 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. Shear force

*Note: On a vertical wall, the magnet holds merely approx. 20-30% of its perpendicular strength.

2. Efficiency vs thickness

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

3. Temperature resistance

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

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

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

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The P_c (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher P_c value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Engineering data and GPSR

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%

Sustainability

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

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The offered product is an incredibly powerful cylindrical magnet, made from durable NdFeB material, which, at dimensions of Ø12x4 mm, guarantees the highest energy density. The MW 12x4 / N38 component is characterized by high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 3.45 kg), this product is available off-the-shelf from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 33.81 N with a weight of only 3.39 g, this rod is indispensable in miniature devices 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., 12.1 mm) using epoxy glues. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Magnets NdFeB grade N38 are suitable for the majority 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 store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 12 mm and height 4 mm. 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 oxidation, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 4 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.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Strengths

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

They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
Neodymium magnets remain highly resistant to magnetic field loss caused by external magnetic fields,
In other words, due to the reflective layer of gold, the element becomes visually attractive,
Magnetic induction on the working layer of the magnet turns out to be strong,
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 option of flexible shaping and adaptation to unique projects, NdFeB magnets can be manufactured in a wide range of forms and dimensions, which expands the range of possible applications,
Universal use in modern technologies – they are utilized in mass storage devices, electromotive mechanisms, advanced medical instruments, and technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in miniature devices

Disadvantages

Drawbacks and weaknesses of neodymium magnets: tips and applications.

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
Limited possibility of making nuts in the magnet and complex shapes - preferred is a housing - magnetic holder.
Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can complicate diagnosis medical when they are in the body.
With budget limitations the cost of neodymium magnets is economically unviable,

Pull force analysis

Magnetic strength at its maximum – what affects it?

Information about lifting capacity is the result of a measurement for optimal configuration, assuming:

with the application of a sheet made of low-carbon steel, ensuring maximum field concentration
whose transverse dimension is min. 10 mm
with a surface free of scratches
without any clearance between the magnet and steel
for force applied at a right angle (pull-off, not shear)
at ambient temperature room level

Lifting capacity in real conditions – factors

In practice, the actual holding force depends on several key aspects, ranked from crucial:

Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Base massiveness – insufficiently thick steel does not close the flux, causing part of the power to be escaped to the other side.
Material type – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was assessed with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.

Safe handling of neodymium magnets

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Hand protection

Big blocks can break fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Warning for heart patients

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

Power loss in heat

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. Damage is permanent.

Compass and GPS

Note: neodymium magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, device, and navigation systems.

Magnetic media

Do not bring magnets close to a purse, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Do not give to children

Only for adults. Tiny parts can be swallowed, causing serious injuries. Keep out of reach of children and animals.

Allergic reactions

It is widely known that nickel (standard magnet coating) is a common allergen. If you have an allergy, avoid direct skin contact or choose coated magnets.

Fragile material

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Caution required

Handle magnets consciously. Their huge power can surprise even professionals. Be vigilant and respect their power.

Attention! Want to know more? Check our post: Are neodymium magnets dangerous?

MW 12x4 / N38 - cylindrical magnet

Physical properties - MW 12x4 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the product - report

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

Table 2: Slippage hold (vertical surface) MW 12x4 / N38

Table 3: Wall mounting (sliding) - vertical pull MW 12x4 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MW 12x4 / N38

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

Table 6: Two magnets (attraction) - forces in the system MW 12x4 / N38

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

Table 8: Collisions (kinetic energy) - warning MW 12x4 / N38

Table 9: Surface protection spec MW 12x4 / N38

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

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

1. Shear force

2. Efficiency vs thickness

3. Temperature resistance

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

Elemental analysis

Sustainability

Magnet pull force

Magnetic Field

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MP 25x12.5x5 / N38 - ring magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Disadvantages

Pull force analysis

Magnetic strength at its maximum – what affects it?

Lifting capacity in real conditions – factors

Safe handling of neodymium magnets

Dust explosion hazard

Hand protection

Warning for heart patients

Power loss in heat

Compass and GPS

Magnetic media

Do not give to children

Allergic reactions

Fragile material

Caution required

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Slippage hold (vertical surface)
MW 12x4 / N38

Table 3: Wall mounting (sliding) - vertical pull
MW 12x4 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MW 12x4 / N38

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

Table 6: Two magnets (attraction) - forces in the system
MW 12x4 / N38

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

Table 8: Collisions (kinetic energy) - warning
MW 12x4 / N38

Table 9: Surface protection spec
MW 12x4 / N38

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

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

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.