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MPL 40x18x10 SH / N38 - lamellar 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

lamellar magnet

Catalog no 020157

GTIN/EAN: 5906301811633

5.00

Load capacity 23.81 kg / 233.58 N Magnetic Induction 366.66 mT / 3667 Gs

length: 40 mm [±0,1 mm]
Width: 18 mm [±0,1 mm]
Height: 10 mm [±0,1 mm]
Weight: 54 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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Frequently asked questions

How much will a block magnet really hold?

The catalogue force is measured in full contact with smooth steel at least 10 mm thick, pulled perpendicular, at about 20 °C. On 1 mm sheet about 50% of that value remains, on 0.5 mm about 25%. Mounted on a vertical wall the realistic figure is 20–30%, because the load is then in shear rather than in tension.

What is the maximum working temperature?

Standard N-series grades up to 80 °C, and N50, N52 and N54 up to 60 °C. Above the maximum working temperature the loss stops being reversible. The Curie temperature, at which magnetic properties are lost completely, is about 310 °C.

What safety factor should I allow?

At least twice the mass of the item, and three to five times for vertical mounting. The margin covers sheet thickness, surface condition, any layer of paint or rust, and vibration.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Product card - MPL 40x18x10 SH / N38 - lamellar magnet

Specification / characteristics - MPL 40x18x10 SH / N38 - lamellar magnet

properties

properties	values
Cat. no.	020157
GTIN/EAN	5906301811633
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
length	40 mm [±0,1 mm]
Width	18 mm [±0,1 mm]
Height	10 mm [±0,1 mm]
Weight	54 g
Magnetization Direction	↑ axial
Load capacity ~ ?	23.81 kg / 233.58 N
Magnetic Induction ~ ?	366.66 mT / 3667 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x18x10 SH / N38 - lamellar magnet

properties	values	units
Remanence Br ?	12.2-12.6	kGs
Remanence Br ?	1220-1260	mT
Coercivity bHc ?	10.8-11.5	kOe
Coercivity bHc ?	860-915	kA/m
Intrinsic coercivity iHc	≥ 12	kOe
Intrinsic coercivity iHc	≥ 955	kA/m
Energy product BHmax ?	36-38	BH max MGOe
Energy product BHmax ?	287-303	BH max KJ/m
Maximum working 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	310	°C
Curie Temperature TF	590	°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 magnet - report

Presented data represent the direct effect of a mathematical analysis. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Actual parameters may differ from theoretical values. Use these calculations as a supplementary guide for designers.

Table 1: Static force (pull vs gap) - characteristics
MPL 40x18x10 SH / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	3666 Gs 366.6 mT	23.81 kg / 52.49 pounds 23810.0 g / 233.6 N	dangerous!
1 mm	3399 Gs 339.9 mT	20.48 kg / 45.14 pounds 20476.1 g / 200.9 N	dangerous!
2 mm	3120 Gs 312.0 mT	17.25 kg / 38.02 pounds 17245.9 g / 169.2 N	dangerous!
3 mm	2841 Gs 284.1 mT	14.30 kg / 31.54 pounds 14304.1 g / 140.3 N	dangerous!
5 mm	2321 Gs 232.1 mT	9.55 kg / 21.05 pounds 9547.8 g / 93.7 N	strong
10 mm	1370 Gs 137.0 mT	3.32 kg / 7.33 pounds 3324.4 g / 32.6 N	strong
15 mm	833 Gs 83.3 mT	1.23 kg / 2.71 pounds 1229.0 g / 12.1 N	weak grip
20 mm	530 Gs 53.0 mT	0.50 kg / 1.10 pounds 498.1 g / 4.9 N	weak grip
30 mm	244 Gs 24.4 mT	0.11 kg / 0.23 pounds 105.3 g / 1.0 N	weak grip
50 mm	75 Gs 7.5 mT	0.01 kg / 0.02 pounds 9.9 g / 0.1 N	weak grip

Grip strength decreases drastically per each millimeter of distance. Keep in mind that every additional insulation layer (e.g., dirt, paint, dust) significantly weakens the grip. Magnetic products work strongest at the point of direct contact; distance kills the power. Observe how flashily the pull force fall, when the product does not touch tightly to the steel surface. When planning the arrangement, eliminate unnecessary gaps.

Table 2: Vertical hold (vertical surface)
MPL 40x18x10 SH / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	4.76 kg / 10.50 pounds 4762.0 g / 46.7 N
1 mm	Stal (~0.2)	4.10 kg / 9.03 pounds 4096.0 g / 40.2 N
2 mm	Stal (~0.2)	3.45 kg / 7.61 pounds 3450.0 g / 33.8 N
3 mm	Stal (~0.2)	2.86 kg / 6.31 pounds 2860.0 g / 28.1 N
5 mm	Stal (~0.2)	1.91 kg / 4.21 pounds 1910.0 g / 18.7 N
10 mm	Stal (~0.2)	0.66 kg / 1.46 pounds 664.0 g / 6.5 N
15 mm	Stal (~0.2)	0.25 kg / 0.54 pounds 246.0 g / 2.4 N
20 mm	Stal (~0.2)	0.10 kg / 0.22 pounds 100.0 g / 1.0 N
30 mm	Stal (~0.2)	0.02 kg / 0.05 pounds 22.0 g / 0.2 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N

The following data indicates the theoretical shear load necessary to cause the slippage of the magnet downwards along a vertical metal surface (assuming typical friction). The holding force is relative to the gap size between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 40x18x10 SH / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	7.14 kg / 15.75 pounds 7143.0 g / 70.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	4.76 kg / 10.50 pounds 4762.0 g / 46.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	2.38 kg / 5.25 pounds 2381.0 g / 23.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	11.91 kg / 26.25 pounds 11905.0 g / 116.8 N

When mounting a holder on a vertical wall (e.g., a fridge), it will only hold barely about 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient cause that magnets slip faster than they pop off the substrate. Want to create a vertical fastening? Remember that the sliding force is significantly lower than the maximum static pull force. On a painted metal, the magnet will slide down under a much lighter load. Utilizing a rubberized layer can significantly raise the stability.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 40x18x10 SH / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	1.19 kg / 2.62 pounds 1190.5 g / 11.7 N
1 mm	13%	2.98 kg / 6.56 pounds 2976.3 g / 29.2 N
2 mm	25%	5.95 kg / 13.12 pounds 5952.5 g / 58.4 N
3 mm	38%	8.93 kg / 19.68 pounds 8928.7 g / 87.6 N
5 mm	63%	14.88 kg / 32.81 pounds 14881.3 g / 146.0 N
10 mm	100%	23.81 kg / 52.49 pounds 23810.0 g / 233.6 N
11 mm	100%	23.81 kg / 52.49 pounds 23810.0 g / 233.6 N
12 mm	100%	23.81 kg / 52.49 pounds 23810.0 g / 233.6 N

A thin sheet is not enough to focus the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a too thin substrate, the magnetism will penetrate right through and the holding will be smaller. To utilize full efficiency of this neodymium's power, you require a sufficiently solid element of metal. The saturation phenomenon causes that on sheet metal structures (e.g., appliance housings), the product works worse. We advise picking the steel thickness from these parameters.

Table 5: Thermal stability (material behavior) - power drop
MPL 40x18x10 SH / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	23.81 kg / 52.49 pounds 23810.0 g / 233.6 N	OK
40 °C	-2.2%	23.29 kg / 51.34 pounds 23286.2 g / 228.4 N	OK
60 °C	-4.4%	22.76 kg / 50.18 pounds 22762.4 g / 223.3 N
80 °C	-6.6%	22.24 kg / 49.03 pounds 22238.5 g / 218.2 N
100 °C	-28.8%	16.95 kg / 37.37 pounds 16952.7 g / 166.3 N

Standard neodymium magnets irreversibly lose parameters after exceeding the maximum temperature. Watch out for overheating – heat can permanently destroy this product. With increasing heat, the magnet's capacity briefly drops. Do not use this product close to heaters exceeding its safe range. Too high temperature will result in permanent loss of magnetism.

*Technical advisory: Thermal stability is determined by both grade, but also on the magnet's shape. Thin magnets (pancake types) are more susceptible to demagnetization sooner than long magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - field collision
MPL 40x18x10 SH / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	59.64 kg / 131.49 pounds 5 034 Gs	8.95 kg / 19.72 pounds 8947 g / 87.8 N	N/A
1 mm	55.50 kg / 122.35 pounds 7 072 Gs	8.32 kg / 18.35 pounds 8325 g / 81.7 N	49.95 kg / 110.12 pounds ~0 Gs
2 mm	51.29 kg / 113.08 pounds 6 799 Gs	7.69 kg / 16.96 pounds 7694 g / 75.5 N	46.16 kg / 101.77 pounds ~0 Gs
3 mm	47.18 kg / 104.01 pounds 6 520 Gs	7.08 kg / 15.60 pounds 7076 g / 69.4 N	42.46 kg / 93.61 pounds ~0 Gs
5 mm	39.41 kg / 86.88 pounds 5 959 Gs	5.91 kg / 13.03 pounds 5912 g / 58.0 N	35.47 kg / 78.20 pounds ~0 Gs
10 mm	23.92 kg / 52.73 pounds 4 643 Gs	3.59 kg / 7.91 pounds 3588 g / 35.2 N	21.53 kg / 47.46 pounds ~0 Gs
20 mm	8.33 kg / 18.36 pounds 2 739 Gs	1.25 kg / 2.75 pounds 1249 g / 12.3 N	7.49 kg / 16.52 pounds ~0 Gs
50 mm	0.55 kg / 1.22 pounds 705 Gs	0.08 kg / 0.18 pounds 83 g / 0.8 N	0.50 kg / 1.09 pounds ~0 Gs
60 mm	0.26 kg / 0.58 pounds 487 Gs	0.04 kg / 0.09 pounds 40 g / 0.4 N	0.24 kg / 0.52 pounds ~0 Gs
70 mm	0.13 kg / 0.30 pounds 348 Gs	0.02 kg / 0.04 pounds 20 g / 0.2 N	0.12 kg / 0.27 pounds ~0 Gs
80 mm	0.07 kg / 0.16 pounds 256 Gs	0.01 kg / 0.02 pounds 11 g / 0.1 N	0.07 kg / 0.14 pounds ~0 Gs
90 mm	0.04 kg / 0.09 pounds 194 Gs	0.01 kg / 0.01 pounds 6 g / 0.1 N	0.04 kg / 0.08 pounds ~0 Gs
100 mm	0.02 kg / 0.05 pounds 149 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs

Two magnets attract each other from a wider radius than a magnet and steel setup. Such a system of magnet-to-magnet produces a massive flux and a wider radius of performance. Planning to create a strong closure? Use a pair of magnets instead of one magnet and a steel. Remember that when bringing together two magnets, the collision energy is huge. The levitation is marginally weaker than the attraction, but still impressive.
*Flux density between like poles reaches ~0 Gs in the exact middle of the gap (due to field cancellation).
Note: Figures demonstrate shear force of two identical neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - warnings
MPL 40x18x10 SH / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	14.0 cm
Hearing aid	10 Gs (1.0 mT)	11.0 cm
Mechanical watch	20 Gs (2.0 mT)	8.5 cm
Mobile device	40 Gs (4.0 mT)	6.5 cm
Car key	50 Gs (5.0 mT)	6.0 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

A strong magnetic field poses a large risk to IT equipment and pacemakers. These magnets produce a flux that prevents correct functioning of digital equipment. Remember: the unseen radiation passes through tissues and housings. Increased vigilance must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - collision effects
MPL 40x18x10 SH / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.75 km/h (6.32 m/s)	1.08 J
30 mm	24.44 km/h (6.79 m/s)	1.24 J
50 mm	24.51 km/h (6.81 m/s)	1.25 J
100 mm	24.52 km/h (6.81 m/s)	1.25 J

Magnetic elements are very brittle – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Impact energy can trigger coating fragments or painful pinches to skin. Hold the magnet firmly during installation so it doesn't hit with great force against the steel surface. A collision at high speed means shattering of the neodymium. Wear safety glasses when playing with powerful specimens.

Table 9: Anti-corrosion coating durability
MPL 40x18x10 SH / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (P_c)
MPL 40x18x10 SH / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	26 060 Mx	260.6 µWb
P_c Coefficient	0.43	Low (Flat)

Total magnetic flux emitted by the pole surface. Essential parameter in coil applications as well as sensors. P_c value defines the magnet's operating point.

Table 11: Physics of underwater searching
MPL 40x18x10 SH / N38

Environment	Effective steel pull	Effect
Air (land)	23.81 kg	Standard
Water (riverbed)	27.26 kg (+3.45 kg buoyancy gain)	+14.5%

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

Contrary to myths, water does not block the magnetic field. Buoyancy helps in lifting finds.

1. Sliding resistance

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

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) severely limits the holding force.

3. Temperature resistance

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.43

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

Material specification

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

Ecology and recycling (GPSR)

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 020157-2026

Measurement Calculator

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MPL 30x10x5 / N38 - lamellar magnet

4.26 zł brutto / pcs

This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 40x18x10 mm and a weight of 54 g, guarantees premium class connection. This rectangular block with a force of 233.58 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.

Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 23.81 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.

They constitute a key element in the production of wind generators and material handling systems. Thanks to the flat surface and high force (approx. 23.81 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.

For mounting flat magnets MPL 40x18x10 SH / N38, we recommend utilizing two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

Standardly, the MPL 40x18x10 SH / N38 model is magnetized axially (dimension 10 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.

This model is characterized by dimensions 40x18x10 mm, which, at a weight of 54 g, makes it an element with impressive energy density. It is a magnetic block with dimensions 40x18x10 mm and a self-weight of 54 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of Nd₂Fe₁₄B magnets.

Strengths

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:

Their strength remains stable, and after around 10 years it decreases only by ~1% (according to research),
They possess excellent resistance to magnetic field loss due to external magnetic sources,
In other words, due to the aesthetic layer of silver, the element is aesthetically pleasing,
They show high magnetic induction at the operating surface, which improves attraction properties,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Considering the option of free molding and customization to specialized projects, magnetic components can be modeled in a wide range of geometric configurations, which expands the range of possible applications,
Versatile presence in modern technologies – they find application in data components, drive modules, medical equipment, also industrial machines.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of neodymium magnets:

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
We suggest cover - magnetic mount, due to difficulties in producing threads inside the magnet and complex shapes.
Possible danger to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to complicate diagnosis medical after entering the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Holding force of 23.81 kg is a result of laboratory testing executed under the following configuration:

with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
possessing a massiveness of minimum 10 mm to avoid saturation
characterized by lack of roughness
under conditions of gap-free contact (metal-to-metal)
for force applied at a right angle (pull-off, not shear)
at conditions approx. 20°C

Magnet lifting force in use – key factors

It is worth knowing that the working load will differ subject to the following factors, in order of importance:

Distance – existence of any layer (rust, tape, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically several times smaller (approx. 1/5 of the lifting capacity).
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
Chemical composition of the base – mild steel attracts best. Alloy steels lower magnetic properties and holding force.
Surface quality – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was assessed with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safety rules for work with NdFeB magnets

Demagnetization risk

Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Impact on smartphones

Remember: neodymium magnets generate a field that confuses precision electronics. Keep a safe distance from your phone, device, and GPS.

Mechanical processing

Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Skin irritation risks

It is widely known that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from direct skin contact and opt for versions in plastic housing.

Powerful field

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

Material brittleness

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

Choking Hazard

Always keep magnets away from children. Ingestion danger is high, and the consequences of magnets clamping inside the body are tragic.

Electronic hazard

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

Physical harm

Large magnets can smash fingers in a fraction of a second. Do not place your hand betwixt two attracting surfaces.

Implant safety

For implant holders: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.

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

MPL 40x18x10 SH / N38 - lamellar magnet

Product card - MPL 40x18x10 SH / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the magnet - report

Table 1: Static force (pull vs gap) - characteristics MPL 40x18x10 SH / N38

Table 2: Vertical hold (vertical surface) MPL 40x18x10 SH / N38

Table 3: Vertical assembly (sliding) - vertical pull MPL 40x18x10 SH / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MPL 40x18x10 SH / N38

Table 5: Thermal stability (material behavior) - power drop MPL 40x18x10 SH / N38

Table 6: Two magnets (repulsion) - field collision MPL 40x18x10 SH / N38

Table 7: Safety (HSE) (electronics) - warnings MPL 40x18x10 SH / N38

Table 8: Collisions (cracking risk) - collision effects MPL 40x18x10 SH / N38

Table 9: Anti-corrosion coating durability MPL 40x18x10 SH / N38

Table 10: Construction data (Pc) MPL 40x18x10 SH / N38

Table 11: Physics of underwater searching MPL 40x18x10 SH / N38

1. Sliding resistance

2. Steel thickness impact

3. Temperature resistance

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

Material specification

Ecology and recycling (GPSR)

Force (pull)

Magnetic Induction

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Pros and cons of Nd2Fe14B magnets.

Strengths

Cons

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Magnet lifting force in use – key factors

Safety rules for work with NdFeB magnets

Demagnetization risk

Impact on smartphones

Mechanical processing

Skin irritation risks

Powerful field

Material brittleness

Choking Hazard

Electronic hazard

Physical harm

Implant safety

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - characteristics
MPL 40x18x10 SH / N38

Table 2: Vertical hold (vertical surface)
MPL 40x18x10 SH / N38

Table 3: Vertical assembly (sliding) - vertical pull
MPL 40x18x10 SH / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MPL 40x18x10 SH / N38

Table 5: Thermal stability (material behavior) - power drop
MPL 40x18x10 SH / N38

Table 6: Two magnets (repulsion) - field collision
MPL 40x18x10 SH / N38

Table 7: Safety (HSE) (electronics) - warnings
MPL 40x18x10 SH / N38

Table 8: Collisions (cracking risk) - collision effects
MPL 40x18x10 SH / N38

Table 9: Anti-corrosion coating durability
MPL 40x18x10 SH / N38

Table 10: Construction data (P_c)
MPL 40x18x10 SH / N38

Table 11: Physics of underwater searching
MPL 40x18x10 SH / N38

Pros and cons of Nd₂Fe₁₄B magnets.