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MW 12x4 / 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 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 specifications »

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

Engineering modeling of the magnet - report

Presented values are the result of a engineering simulation. Results are based on algorithms for the class Nd₂Fe₁₄B. Actual performance might slightly differ. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs gap) - power drop
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 decreases drastically with every subsequent millimeter of distance. Remember that even a microscopic distance (e.g., dirt, paint, rust) significantly diminishes the holding power. Neodymiums operate optimally at the point of direct contact; gap weakens the power. Observe how rapidly the pull force drop, when the product does not touch flatly to the steel surface. When designing the assembly, discard unnecessary gaps.

Table 2: Sliding load (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 shows the theoretical shear load sufficient to cause the slippage of the magnet vertically against a upright steel wall (assuming standard friction coefficient). This parameter depends on the separation distance between the magnet and the surface.

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 holder on a upright wall (e.g., a fridge), it you can count on just about 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient mean that holders move down faster than they pop off the substrate. Want to create a vertical fastening? Remember that the sliding force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the element will slip down under a noticeably lighter cargo. Using a rubber layer can effectively improve the result.

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 thin sheet cannot take in the full magnetic flux, which squanders power of the magnet. If you mount a strong magnet to a too thin substrate, the magnetism will pass right through and the attraction force will be weaker. To utilize full efficiency of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation effect means that on sheet metal structures (e.g., car bodies), the product holds weaker. We advise picking the steel thickness based on the following data.

Table 5: Thermal resistance (stability) - power drop
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 lose parameters after exceeding the maximum temperature. Watch out for overheating – high temperature can irreversibly demagnetize this magnet. As the temperature rises, the neodymium's force temporarily decreases. Avoid using this magnet in hot environments exceeding its operating temperature limit. Ignoring the limit will result in irreversible degradation of magnetism.

*Important note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low Pc) may lose charge permanently at lower temperatures compared to rod magnets. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field range
MW 12x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (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 much further distance than a magnet and sheet setup. Such a system of magnet-to-magnet generates a stronger field and a further horizon of action. Designing a solid fastener? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the impact force is massive. The repulsion force is a bit weaker than the connection force, but still large.
*Field value for N-N configuration is approximately ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Important: Estimates apply to sliding force of two same neodymium magnets (friction ~0.15 for Ni-Ni coating).

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
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 real danger to electronics as well as medical implants. These NdFeB products produce a flux that destroys function of sensitive medical devices. Remember: the invisible magnetic field acts through matter and housings. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: automatic timepieces, car keys, speakers, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (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

NdFeB products are prone to chipping – a collision with steel can result in shattering. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Kinetic force can destroy the magnet or injury to skin. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when handling with large magnets.

Table 9: Corrosion resistance
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 following table defines the conditions under which this product can be safely used. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical 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 passing through the pole surface. Key data in coil applications and motors. 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!

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

1. Wall mount (shear)

*Caution: On a vertical wall, the magnet holds just approx. 20-30% of its max power.

2. Steel thickness impact

*Thin steel (e.g. computer case) drastically reduces the holding force.

3. Thermal stability

*For N38 grade, 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%

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

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MW 10x30 / N38 - cylindrical magnet

8.61 ZŁ brutto / pcs

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MP 20x8/4x3 / N38 - ring magnet

3.59 ZŁ brutto / pcs

This product is a very strong cylindrical magnet, manufactured from durable NdFeB material, which, with dimensions of Ø12x4 mm, guarantees the highest energy density. The MW 12x4 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 3.45 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is perfect for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the pull force of 33.81 N with a weight of only 3.39 g, this rod is indispensable in electronics and wherever every gram matters.

Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. 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.

Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need the strongest 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.

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 secures it against oxidation, 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. 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 and cons of Nd₂Fe₁₄B magnets.

Advantages

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

Their power remains stable, and after around ten years it decreases only by ~1% (according to research),
They feature excellent resistance to weakening of magnetic properties due to external magnetic sources,
In other words, due to the aesthetic finish of gold, the element gains visual value,
Neodymium magnets create maximum magnetic induction on a their surface, which increases force concentration,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Considering the ability of flexible shaping and adaptation to individualized needs, magnetic components can be produced in a variety of geometric configurations, which makes them more universal,
Key role in modern technologies – they are used in magnetic memories, electric drive systems, diagnostic systems, also industrial machines.
Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages

Cons of neodymium magnets: tips and applications.

At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 extremely resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
We recommend cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Furthermore, small components of these devices can be problematic in diagnostics medical when they are in the body.
Due to neodymium price, their price is relatively high,

Pull force analysis

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

Breakaway force was determined for optimal configuration, assuming:

on a base made of structural steel, optimally conducting the magnetic flux
possessing a thickness of minimum 10 mm to avoid saturation
with a plane cleaned and smooth
under conditions of no distance (surface-to-surface)
under perpendicular force vector (90-degree angle)
in temp. approx. 20°C

Lifting capacity in real conditions – factors

During everyday use, the actual lifting capacity results from several key aspects, listed from most significant:

Clearance – the presence of foreign body (paint, tape, air) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
Angle of force application – maximum parameter is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Metal type – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Precautions when working with neodymium magnets

Thermal limits

Do not overheat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Mechanical processing

Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction occurs, immediately stop handling magnets and use protective gear.

Electronic hazard

Powerful magnetic fields can erase data on credit cards, HDDs, and storage devices. Keep a distance of min. 10 cm.

Caution required

Exercise caution. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can react.

Bone fractures

Watch your fingers. Two powerful magnets will join immediately with a force of massive weight, destroying anything in their path. Be careful!

Phone sensors

Be aware: neodymium magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, device, and GPS.

Eye protection

Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.

Do not give to children

These products are not intended for children. Swallowing several magnets can lead to them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.

ICD Warning

For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

Safety First! More info about risks in the article: Magnet Safety Guide.

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

Engineering modeling of the magnet - report

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

Table 2: Sliding load (vertical surface) MW 12x4 / N38

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

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

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

Table 6: Two magnets (attraction) - field range MW 12x4 / N38

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

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

Table 9: Corrosion resistance MW 12x4 / N38

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

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

1. Wall mount (shear)

2. Steel thickness impact

3. Thermal stability

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

Elemental analysis

Ecology and recycling (GPSR)

Pulling force

Magnetic Field

See also products

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

SM 32x325 [2xM8] / N52 - magnetic separator

MW 10x30 / N38 - cylindrical magnet

MP 20x8/4x3 / N38 - ring magnet

Pros and cons of Nd2Fe14B magnets.

Advantages

Disadvantages

Pull force analysis

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

Lifting capacity in real conditions – factors

Precautions when working with neodymium magnets

Thermal limits

Mechanical processing

Sensitization to coating

Electronic hazard

Caution required

Bone fractures

Phone sensors

Eye protection

Do not give to children

ICD Warning

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Sliding load (vertical surface)
MW 12x4 / N38

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

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

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

Table 6: Two magnets (attraction) - field range
MW 12x4 / N38

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

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

Table 9: Corrosion resistance
MW 12x4 / N38

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

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

Pros and cons of Nd₂Fe₁₄B magnets.