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MW 40x30 / 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 010068

GTIN/EAN: 5906301810674

5.00

Diameter Ø

40 mm [±0,1 mm]

Height

30 mm [±0,1 mm]

Weight

282.74 g

Magnetization Direction

→ diametrical

Load capacity

54.73 kg / 536.88 N

Magnetic Induction

515.71 mT / 5157 Gs

Coating

[NiCuNi] Nickel

view technical specifications »

104.80 ZŁ with VAT / pcs + price for transport

85.20 ZŁ net + 23% VAT / pcs

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Specifications and shape of a neodymium magnet can be calculated on our force calculator.

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Detailed specification - MW 40x30 / N38 - cylindrical magnet

Specification / characteristics - MW 40x30 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010068
GTIN/EAN	5906301810674
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	40 mm [±0,1 mm]
Height	30 mm [±0,1 mm]
Weight	282.74 g
Magnetization Direction	→ diametrical
Load capacity ~ ?	54.73 kg / 536.88 N
Magnetic Induction ~ ?	515.71 mT / 5157 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 40x30 / 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 magnet - technical parameters

The following information are the direct effect of a mathematical simulation. Results rely on models for the class Nd₂Fe₁₄B. Actual conditions may differ. Please consider these data as a reference point for designers.

Table 1: Static pull force (force vs gap) - interaction chart
MW 40x30 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5156 Gs 515.6 mT	54.73 kg / 120.66 lbs 54730.0 g / 536.9 N	critical level
1 mm	4900 Gs 490.0 mT	49.43 kg / 108.98 lbs 49432.0 g / 484.9 N	critical level
2 mm	4641 Gs 464.1 mT	44.33 kg / 97.74 lbs 44334.0 g / 434.9 N	critical level
3 mm	4383 Gs 438.3 mT	39.54 kg / 87.17 lbs 39538.7 g / 387.9 N	critical level
5 mm	3879 Gs 387.9 mT	30.98 kg / 68.30 lbs 30981.5 g / 303.9 N	critical level
10 mm	2773 Gs 277.3 mT	15.83 kg / 34.89 lbs 15826.7 g / 155.3 N	critical level
15 mm	1946 Gs 194.6 mT	7.79 kg / 17.18 lbs 7792.9 g / 76.4 N	warning
20 mm	1372 Gs 137.2 mT	3.88 kg / 8.55 lbs 3877.9 g / 38.0 N	warning
30 mm	723 Gs 72.3 mT	1.08 kg / 2.37 lbs 1076.5 g / 10.6 N	low risk
50 mm	258 Gs 25.8 mT	0.14 kg / 0.30 lbs 137.4 g / 1.3 N	low risk

Grip strength decreases significantly with every subsequent millimeter of distance. Keep in mind that even the smallest gap (e.g., dirt, varnish, rust) significantly reduces the pull force. Neodymiums operate most effectively in perfect adhesion; air break weakens the power. See how rapidly the load capacity plummet, when the product does not touch tightly to the steel surface. When designing the arrangement, discard unnecessary gaps.

Table 2: Vertical hold (wall)
MW 40x30 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	10.95 kg / 24.13 lbs 10946.0 g / 107.4 N
1 mm	Stal (~0.2)	9.89 kg / 21.79 lbs 9886.0 g / 97.0 N
2 mm	Stal (~0.2)	8.87 kg / 19.55 lbs 8866.0 g / 87.0 N
3 mm	Stal (~0.2)	7.91 kg / 17.43 lbs 7908.0 g / 77.6 N
5 mm	Stal (~0.2)	6.20 kg / 13.66 lbs 6196.0 g / 60.8 N
10 mm	Stal (~0.2)	3.17 kg / 6.98 lbs 3166.0 g / 31.1 N
15 mm	Stal (~0.2)	1.56 kg / 3.43 lbs 1558.0 g / 15.3 N
20 mm	Stal (~0.2)	0.78 kg / 1.71 lbs 776.0 g / 7.6 N
30 mm	Stal (~0.2)	0.22 kg / 0.48 lbs 216.0 g / 2.1 N
50 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 28.0 g / 0.3 N

The following data defines the estimated force required to initiate the slippage of the magnet downwards against a upright steel plate (assuming standard friction coefficient). This value is a function of the air gap between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 40x30 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	16.42 kg / 36.20 lbs 16419.0 g / 161.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	10.95 kg / 24.13 lbs 10946.0 g / 107.4 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	5.47 kg / 12.07 lbs 5473.0 g / 53.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	27.37 kg / 60.33 lbs 27365.0 g / 268.5 N

When mounting a holder on a vertical plane (e.g., a fridge), it will maintain barely approx. 20%-30% of nominal attraction strength. Gravitational force as well as a weak degree of grip cause that magnets slide down easier than they detach. Designing a vertical fastening? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the holder will slip down under a much lighter cargo. Application of an anti-slip layer can drastically raise the stability.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 40x30 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	3%	1.82 kg / 4.02 lbs 1824.3 g / 17.9 N
1 mm	8%	4.56 kg / 10.05 lbs 4560.8 g / 44.7 N
2 mm	17%	9.12 kg / 20.11 lbs 9121.7 g / 89.5 N
3 mm	25%	13.68 kg / 30.16 lbs 13682.5 g / 134.2 N
5 mm	42%	22.80 kg / 50.27 lbs 22804.2 g / 223.7 N
10 mm	83%	45.61 kg / 100.55 lbs 45608.3 g / 447.4 N
11 mm	92%	50.17 kg / 110.60 lbs 50169.2 g / 492.2 N
12 mm	100%	54.73 kg / 120.66 lbs 54730.0 g / 536.9 N

A too thin steel is not enough to conduct the full magnetic flux, which squanders power of the magnet. If you mount a strong magnet to a weak sheet, the flux will penetrate right through and the pull force will drop sharply. To achieve 100% of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation phenomenon means that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We recommend selecting the steel dimension from these parameters.

Table 5: Thermal stability (material behavior) - resistance threshold
MW 40x30 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	54.73 kg / 120.66 lbs 54730.0 g / 536.9 N	OK
40 °C	-2.2%	53.53 kg / 118.00 lbs 53525.9 g / 525.1 N	OK
60 °C	-4.4%	52.32 kg / 115.35 lbs 52321.9 g / 513.3 N	OK
80 °C	-6.6%	51.12 kg / 112.70 lbs 51117.8 g / 501.5 N
100 °C	-28.8%	38.97 kg / 85.91 lbs 38967.8 g / 382.3 N

Ordinary NdFeB products irreversibly lose parameters after exceeding the maximum temperature. Avoid high temperatures – high temperature can permanently demagnetize this magnet. With increasing heat, the magnet's capacity temporarily lowers. Do not use this magnet close to ovens exceeding its safe range. Exceeding the critical threshold will lead to permanent loss of magnetism.

*Technical advisory: Temperature resistance depends not only on the material grade, as well as the dimension ratios. Flat magnets (low permeance coefficient) may lose charge permanently under lower heat stress than long magnets. The danger warning in the table indicates permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 40x30 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	205.97 kg / 454.08 lbs 5 879 Gs	30.89 kg / 68.11 lbs 30895 g / 303.1 N	N/A
1 mm	195.99 kg / 432.09 lbs 10 060 Gs	29.40 kg / 64.81 lbs 29399 g / 288.4 N	176.39 kg / 388.88 lbs ~0 Gs
2 mm	186.03 kg / 410.12 lbs 9 800 Gs	27.90 kg / 61.52 lbs 27904 g / 273.7 N	167.42 kg / 369.11 lbs ~0 Gs
3 mm	176.30 kg / 388.68 lbs 9 541 Gs	26.45 kg / 58.30 lbs 26445 g / 259.4 N	158.67 kg / 349.81 lbs ~0 Gs
5 mm	157.67 kg / 347.60 lbs 9 023 Gs	23.65 kg / 52.14 lbs 23650 g / 232.0 N	141.90 kg / 312.84 lbs ~0 Gs
10 mm	116.59 kg / 257.04 lbs 7 759 Gs	17.49 kg / 38.56 lbs 17489 g / 171.6 N	104.93 kg / 231.34 lbs ~0 Gs
20 mm	59.56 kg / 131.31 lbs 5 545 Gs	8.93 kg / 19.70 lbs 8934 g / 87.6 N	53.60 kg / 118.18 lbs ~0 Gs
50 mm	7.52 kg / 16.58 lbs 1 971 Gs	1.13 kg / 2.49 lbs 1128 g / 11.1 N	6.77 kg / 14.92 lbs ~0 Gs
60 mm	4.05 kg / 8.93 lbs 1 446 Gs	0.61 kg / 1.34 lbs 608 g / 6.0 N	3.65 kg / 8.04 lbs ~0 Gs
70 mm	2.28 kg / 5.03 lbs 1 085 Gs	0.34 kg / 0.75 lbs 342 g / 3.4 N	2.05 kg / 4.53 lbs ~0 Gs
80 mm	1.34 kg / 2.96 lbs 832 Gs	0.20 kg / 0.44 lbs 201 g / 2.0 N	1.21 kg / 2.66 lbs ~0 Gs
90 mm	0.82 kg / 1.80 lbs 650 Gs	0.12 kg / 0.27 lbs 123 g / 1.2 N	0.74 kg / 1.62 lbs ~0 Gs
100 mm	0.52 kg / 1.14 lbs 517 Gs	0.08 kg / 0.17 lbs 78 g / 0.8 N	0.47 kg / 1.03 lbs ~0 Gs

Two strong neodymiums interact 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 strong closure? Use a pair of magnets instead of one magnet and a steel. Exercise caution that when connecting a pair of magnets, the pinch force is huge. The levitation is slightly lower than the connection force, but still impressive.
*Flux density in repulsion mode is approximately ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Attention: Figures refer to friction force of two same neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - warnings
MW 40x30 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	23.5 cm
Hearing aid	10 Gs (1.0 mT)	18.0 cm
Mechanical watch	20 Gs (2.0 mT)	14.0 cm
Mobile device	40 Gs (4.0 mT)	11.0 cm
Car key	50 Gs (5.0 mT)	10.0 cm
Payment card	400 Gs (40.0 mT)	4.5 cm
HDD hard drive	600 Gs (60.0 mT)	3.5 cm

A strong magnetic field is a large risk to electronic devices and medical implants. These neodymiums generate a flux that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field acts through matter and housings. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MW 40x30 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	16.37 km/h (4.55 m/s)	2.92 J
30 mm	24.60 km/h (6.83 m/s)	6.60 J
50 mm	31.42 km/h (8.73 m/s)	10.77 J
100 mm	44.37 km/h (12.33 m/s)	21.48 J

Neodymium magnets are very brittle – a collision with steel causes immediate chipping. Control the attraction moment – a magnet released freely becomes dangerous. Impact energy can trigger coating fragments or painful pinches to skin. Always hold the magnet during mounting so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 40x30 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 40x30 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	65 488 Mx	654.9 µWb
P_c Coefficient	0.76	High (Stable)

Flux value passing through the magnet pole. Key data for generator designers as well as sensors. The P_c coefficient determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MW 40x30 / N38

Environment	Effective steel pull	Effect
Air (land)	54.73 kg	Standard
Water (riverbed)	62.67 kg (+7.94 kg buoyancy gain)	+14.5%

Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Caution: On a vertical wall, the magnet retains merely approx. 20-30% of its nominal pull.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.

3. Thermal stability

*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) = 0.76

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

Technical specification and ecology

Chemical composition

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

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: 010068-2026

Measurement Calculator

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The offered product is an incredibly powerful cylinder magnet, composed of modern NdFeB material, which, with dimensions of Ø40x30 mm, guarantees the highest energy density. This specific item is characterized by a tolerance of ±0.1mm and professional build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with significant force (approx. 54.73 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Moreover, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing 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 pull force of 536.88 N with a weight of only 282.74 g, this cylindrical magnet is indispensable in electronics and wherever every gram matters.

Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 40.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø40x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 40 mm and height 30 mm. The value of 536.88 N means that the magnet is capable of holding a weight many times exceeding its own mass of 282.74 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 30 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.

Strengths

Apart from their consistent magnetism, neodymium magnets have these key benefits:

They have constant strength, and over nearly ten years their performance decreases symbolically – ~1% (according to theory),
They do not lose their magnetic properties even under strong external field,
Thanks to the elegant finish, the surface of Ni-Cu-Ni, gold, or silver-plated gives an elegant appearance,
Magnetic induction on the top side of the magnet turns out to be very high,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Possibility of accurate shaping and modifying to complex needs,
Universal use in electronics industry – they are commonly used in hard drives, motor assemblies, diagnostic systems, also modern systems.
Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which allows their use in small systems

Limitations

Characteristics of disadvantages of neodymium magnets: application proposals

At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
Due to limitations in realizing threads and complicated shapes in magnets, we recommend using a housing - magnetic holder.
Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child safety. Additionally, small components of these magnets are able to be problematic in diagnostics 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

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what it depends on?

The load parameter shown concerns the peak performance, recorded under ideal test conditions, specifically:

on a base made of structural steel, optimally conducting the magnetic field
whose transverse dimension reaches at least 10 mm
with a plane cleaned and smooth
without any air gap between the magnet and steel
during detachment in a direction vertical to the plane
at temperature approx. 20 degrees Celsius

Lifting capacity in practice – influencing factors

Holding efficiency impacted by working environment parameters, mainly (from most important):

Distance – the presence of foreign body (rust, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Base massiveness – insufficiently thick steel does not accept the full field, causing part of the power to be lost to the other side.
Chemical composition of the base – low-carbon steel attracts best. Alloy steels lower magnetic permeability and holding force.
Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet and the plate lowers the holding force.

Safe handling of neodymium magnets

Metal Allergy

Some people suffer from a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Prolonged contact can result in dermatitis. It is best to wear safety gloves.

Physical harm

Watch your fingers. Two large magnets will snap together instantly with a force of massive weight, crushing everything in their path. Be careful!

Data carriers

Powerful magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Stay away of min. 10 cm.

Operating temperature

Keep cool. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Powerful field

Handle with care. Rare earth magnets attract from a long distance and connect with huge force, often faster than you can move away.

This is not a toy

Always keep magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are very dangerous.

ICD Warning

Health Alert: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Magnetic interference

Navigation devices and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.

Dust is flammable

Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Magnets are brittle

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Important! Want to know more? Read our article: Are neodymium magnets dangerous?

MW 40x30 / N38 - cylindrical magnet

Detailed specification - MW 40x30 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the magnet - technical parameters

Table 1: Static pull force (force vs gap) - interaction chart MW 40x30 / N38

Table 2: Vertical hold (wall) MW 40x30 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 40x30 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MW 40x30 / N38

Table 5: Thermal stability (material behavior) - resistance threshold MW 40x30 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MW 40x30 / N38

Table 7: Protective zones (electronics) - warnings MW 40x30 / N38

Table 8: Dynamics (kinetic energy) - warning MW 40x30 / N38

Table 9: Anti-corrosion coating durability MW 40x30 / N38

Table 10: Electrical data (Flux) MW 40x30 / N38

Table 11: Underwater work (magnet fishing) MW 40x30 / N38

1. Shear force

2. Plate thickness effect

3. Thermal stability

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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Magnetic Field

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Pros and cons of Nd2Fe14B magnets.

Strengths

Limitations

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what it depends on?

Lifting capacity in practice – influencing factors

Safe handling of neodymium magnets

Metal Allergy

Physical harm

Data carriers

Operating temperature

Powerful field

This is not a toy

ICD Warning

Magnetic interference

Dust is flammable

Magnets are brittle

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - interaction chart
MW 40x30 / N38

Table 2: Vertical hold (wall)
MW 40x30 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 40x30 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 40x30 / N38

Table 5: Thermal stability (material behavior) - resistance threshold
MW 40x30 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 40x30 / N38

Table 7: Protective zones (electronics) - warnings
MW 40x30 / N38

Table 8: Dynamics (kinetic energy) - warning
MW 40x30 / N38

Table 9: Anti-corrosion coating durability
MW 40x30 / N38

Table 10: Electrical data (Flux)
MW 40x30 / N38

Table 11: Underwater work (magnet fishing)
MW 40x30 / N38

Pros and cons of Nd₂Fe₁₄B magnets.