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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 properties »

104.80 ZŁ with VAT / pcs + price for transport

85.20 ZŁ net + 23% VAT / pcs

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Product card - 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

Physical simulation of the magnet - data

Presented data constitute the result of a physical calculation. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Real-world parameters might slightly differ. Please consider these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - power drop
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	dangerous!
1 mm	4900 Gs 490.0 mT	49.43 kg / 108.98 lbs 49432.0 g / 484.9 N	dangerous!
2 mm	4641 Gs 464.1 mT	44.33 kg / 97.74 lbs 44334.0 g / 434.9 N	dangerous!
3 mm	4383 Gs 438.3 mT	39.54 kg / 87.17 lbs 39538.7 g / 387.9 N	dangerous!
5 mm	3879 Gs 387.9 mT	30.98 kg / 68.30 lbs 30981.5 g / 303.9 N	dangerous!
10 mm	2773 Gs 277.3 mT	15.83 kg / 34.89 lbs 15826.7 g / 155.3 N	dangerous!
15 mm	1946 Gs 194.6 mT	7.79 kg / 17.18 lbs 7792.9 g / 76.4 N	medium risk
20 mm	1372 Gs 137.2 mT	3.88 kg / 8.55 lbs 3877.9 g / 38.0 N	medium risk
30 mm	723 Gs 72.3 mT	1.08 kg / 2.37 lbs 1076.5 g / 10.6 N	safe
50 mm	258 Gs 25.8 mT	0.14 kg / 0.30 lbs 137.4 g / 1.3 N	safe

Magnetic force drops sharply with every subsequent millimeter of spacing. Note that even a microscopic distance (e.g., dirt, paint, veneer) noticeably weakens the grip. Neodymiums operate optimally in perfect adhesion; air break nullifies the force. Notice how rapidly the pull force plummet, when the product does not touch tightly to the metal substrate. When planning the assembly, eliminate redundant distances.

Table 2: Sliding force (vertical surface)
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 presents the estimated holding capacity needed to start the slippage of the magnet downwards on a upright steel plate (assuming standard friction coefficient). This value varies with the distance 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 upright surface (e.g., a car body), it will only hold only approx. 1/5 of its nominal power. Gravitational force as well as a low friction coefficient influence the fact that holders slide down easier than they detach. Designing a hanger? Consider that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the magnet will give way down under a noticeably lighter load. Utilizing a rubberized coating can significantly increase the grip.

Table 4: Steel thickness (saturation) - 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 unable to conduct the entire magnetic field, which squanders power of the magnet. Should you mount a strong magnet to a weak sheet, the magnetism will penetrate right through and the holding will be smaller. To utilize 100% of this neodymium's potential, you need a suitably thick backing of steel. The saturation effect means that on sheet metal structures (e.g., car bodies), the holder works worse. We advise picking the steel dimension according to the table below.

Table 5: Working in heat (material behavior) - power drop
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

Classic neodymiums lose parameters above the temperature limit. Watch out for overheating – high temperature can permanently destroy this product. As the temperature rises, the magnet's force briefly decreases. Do not use this magnet near heat sources higher than its safe range. Exceeding the critical threshold will lead to destruction of magnetism.

*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) may lose charge permanently at lower temperatures than taller cylinders. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field range
MW 40x30 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (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 attract each other from a significantly greater distance than a magnet and steel combination. Such a system of two magnets produces a massive flux and a larger range of operation. Planning to create a solid fastener? Apply two magnets instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the pinch force is huge. The repulsion force is marginally weaker than the connection force, but still impressive.
*Flux density for N-N configuration reaches ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Important: Figures refer to sliding force of a pair of matching magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (implants) - 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
Timepiece	20 Gs (2.0 mT)	14.0 cm
Mobile device	40 Gs (4.0 mT)	11.0 cm
Remote	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

Extremely neodym field is a real danger to electronic devices as well as pacemakers. These NdFeB products generate a field that disrupts operation of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and plastic. Special caution must be exercised by people with hearing aids and insulin pumps. Also at risk are: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - 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 risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Kinetic force can cause material chips or injury to skin. Always hold the magnet during mounting so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Coating parameters (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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

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 pole surface. Key data when building generators and motors. P_c value determines the magnet's operating point.

Table 11: Submerged application
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%

Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

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

*Warning: On a vertical wall, the magnet retains only a fraction of its max power.

2. Steel thickness impact

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

3. Heat tolerance

*For N38 grade, the max working temp 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 and environmental data

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 presented product is an exceptionally strong rod magnet, composed of advanced NdFeB material, which, at dimensions of Ø40x30 mm, guarantees the highest energy density. The MW 40x30 / N38 model features high dimensional repeatability and industrial build quality, making it an excellent solution for professional 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. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

It successfully proves itself in modeling, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power 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 very precise dimensions, the best method 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 industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. 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 external factors, 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. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Pros and cons of neodymium magnets.

Strengths

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

They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (based on calculations),
They retain their magnetic properties even under external field action,
By using a decorative coating of silver, the element presents an professional look,
Magnets have impressive magnetic induction on the active area,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of detailed creating as well as adapting to defined conditions,
Key role in future technologies – they serve a role in hard drives, motor assemblies, diagnostic systems, and multitasking production systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

What to avoid - cons of neodymium magnets: tips and applications.

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
We recommend a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated forms.
Health risk resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
Due to neodymium price, their price exceeds standard values,

Pull force analysis

Maximum holding power of the magnet – what it depends on?

The lifting capacity listed is a result of laboratory testing performed under standard conditions:

using a base made of mild steel, acting as a ideal flux conductor
whose thickness is min. 10 mm
characterized by even structure
under conditions of ideal adhesion (metal-to-metal)
during detachment in a direction vertical to the plane
in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

Holding efficiency impacted by working environment parameters, including (from priority):

Distance – existence of any layer (rust, tape, air) interrupts the magnetic circuit, 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.
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Plate material – mild steel attracts best. Alloy steels lower magnetic permeability and holding force.
Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed using a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets

Physical harm

Big blocks can break fingers in a fraction of a second. Do not put your hand between two strong magnets.

Machining danger

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

Shattering risk

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

Do not underestimate power

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Allergy Warning

Some people suffer from a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Extended handling might lead to an allergic reaction. We strongly advise use protective gloves.

Compass and GPS

A strong magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.

Medical implants

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Heat sensitivity

Monitor thermal conditions. Exposing the magnet to high heat will ruin its properties and strength.

No play value

These products are not suitable for play. Eating a few magnets can lead to them connecting inside the digestive tract, which constitutes a critical condition and requires immediate surgery.

Cards and drives

Very strong magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

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

MW 40x30 / N38 - cylindrical magnet

Product card - MW 40x30 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the magnet - data

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

Table 2: Sliding force (vertical surface) MW 40x30 / N38

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

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

Table 5: Working in heat (material behavior) - power drop MW 40x30 / N38

Table 6: Two magnets (attraction) - field range MW 40x30 / N38

Table 7: Hazards (implants) - warnings MW 40x30 / N38

Table 8: Collisions (cracking risk) - warning MW 40x30 / N38

Table 9: Coating parameters (durability) MW 40x30 / N38

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

Table 11: Submerged application MW 40x30 / N38

1. Shear force

2. Steel thickness impact

3. Heat tolerance

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

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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MPL 50x50x10 / N38 - lamellar magnet

UMC 32x11/3x8 / N38 - cylindrical magnetic holder

Pros and cons of neodymium magnets.

Strengths

Weaknesses

Pull force analysis

Maximum holding power of the magnet – what it depends on?

Impact of factors on magnetic holding capacity in practice

Safety rules for work with NdFeB magnets

Physical harm

Machining danger

Shattering risk

Do not underestimate power

Allergy Warning

Compass and GPS

Medical implants

Heat sensitivity

No play value

Cards and drives

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Sliding force (vertical surface)
MW 40x30 / N38

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

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

Table 5: Working in heat (material behavior) - power drop
MW 40x30 / N38

Table 6: Two magnets (attraction) - field range
MW 40x30 / N38

Table 7: Hazards (implants) - warnings
MW 40x30 / N38

Table 8: Collisions (cracking risk) - warning
MW 40x30 / N38

Table 9: Coating parameters (durability)
MW 40x30 / N38

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

Table 11: Submerged application
MW 40x30 / N38