Product available Ships today (order by 14:00)

MPL 40x18x10 SH / N38 - lamellar 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

lamellar magnet

Catalog no 020157

GTIN/EAN: 5906301811633

5.00

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

product specifications »

36.29 ZŁ with VAT / pcs + price for transport

29.50 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

29.50 ZŁ

36.29 ZŁ

price from 30 pcs

27.73 ZŁ

34.11 ZŁ

price from 90 pcs

25.96 ZŁ

31.93 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure about your choice?

Call us +48 888 99 98 98 alternatively let us know via our online form the contact form page.
Weight as well as form of a magnet can be checked on our modular calculator.

Order by 14:00 and we’ll ship today!

Technical details - 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
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Technical modeling of the magnet - technical parameters

The following information represent the direct effect of a mathematical calculation. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Actual performance might slightly differ. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs distance) - 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 lbs 23810.0 g / 233.6 N	crushing
1 mm	3399 Gs 339.9 mT	20.48 kg / 45.14 lbs 20476.1 g / 200.9 N	crushing
2 mm	3120 Gs 312.0 mT	17.25 kg / 38.02 lbs 17245.9 g / 169.2 N	crushing
3 mm	2841 Gs 284.1 mT	14.30 kg / 31.54 lbs 14304.1 g / 140.3 N	crushing
5 mm	2321 Gs 232.1 mT	9.55 kg / 21.05 lbs 9547.8 g / 93.7 N	strong
10 mm	1370 Gs 137.0 mT	3.32 kg / 7.33 lbs 3324.4 g / 32.6 N	strong
15 mm	833 Gs 83.3 mT	1.23 kg / 2.71 lbs 1229.0 g / 12.1 N	weak grip
20 mm	530 Gs 53.0 mT	0.50 kg / 1.10 lbs 498.1 g / 4.9 N	weak grip
30 mm	244 Gs 24.4 mT	0.11 kg / 0.23 lbs 105.3 g / 1.0 N	weak grip
50 mm	75 Gs 7.5 mT	0.01 kg / 0.02 lbs 9.9 g / 0.1 N	weak grip

Grip strength weakens drastically per each millimeter of distance. Keep in mind that even the smallest gap (e.g., contamination, varnish, dust) strongly reduces the pull force. Magnets operate most effectively at the point of direct contact; distance nullifies the force. See how rapidly the parameters drop, when the magnet does not touch directly to the steel surface. When calculating the arrangement, eliminate additional spacers.

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

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

The following data indicates the approximate shear load required to cause the downward movement of the magnet vertically on a vertical metal surface (considering typical friction). This value is a function of the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
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 lbs 7143.0 g / 70.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	4.76 kg / 10.50 lbs 4762.0 g / 46.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	2.38 kg / 5.25 lbs 2381.0 g / 23.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	11.91 kg / 26.25 lbs 11905.0 g / 116.8 N

When hanging a element on a upright surface (e.g., a board), it will maintain barely approx. 1/5 of its maximum pull force. Gravity as well as a low friction coefficient influence the fact that holders slide down easier than they detach. Want to create a vertical fastening? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a significantly smaller weight. Utilizing a rubberized pad can drastically improve the result.

Table 4: Steel thickness (substrate influence) - power losses
MPL 40x18x10 SH / N38

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

A thin metal plate cannot focus the entire magnetic field, which weakens actual performance of the magnet. If you install a neodymium to a thin surface, the field will penetrate right through and the pull force will drop sharply. To squeeze full efficiency of this neodymium's power, you need a suitably thick element of metal. The saturation effect means that on thin elements (e.g., car bodies), the magnet holds weaker. We advise picking the steel cross-section according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
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 lbs 23810.0 g / 233.6 N	OK
40 °C	-2.2%	23.29 kg / 51.34 lbs 23286.2 g / 228.4 N	OK
60 °C	-4.4%	22.76 kg / 50.18 lbs 22762.4 g / 223.3 N
80 °C	-6.6%	22.24 kg / 49.03 lbs 22238.5 g / 218.2 N
100 °C	-28.8%	16.95 kg / 37.37 lbs 16952.7 g / 166.3 N

Standard neodymium magnets irreversibly lose strength after exceeding the maximum temperature. Watch out for overheating – excessive heat can irreversibly demagnetize this product. With increasing heat, the neodymium's capacity momentarily decreases. Refrain from using this magnet in hot environments exceeding its operating temperature limit. Too high temperature will result in irreversible degradation of magnetism.

*Important note: Thermal stability depends not only on the material grade, but also on the magnet's shape. Thin magnets (low Pc) risk losing magnetic properties at lower temperatures than taller cylinders. Red status in the table points to a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 40x18x10 SH / N38

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

Two magnets attract each other from a significantly greater distance than a magnet and steel setup. The connection of two magnets creates a more powerful interaction and a larger range of operation. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Be careful that when attracting two neodymiums, the collision energy is extreme. The levitation is marginally weaker than the attraction, but still significant.
*The magnetic induction in repulsion mode drops to ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Important: Estimates apply to shear force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (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
Timepiece	20 Gs (2.0 mT)	8.5 cm
Mobile device	40 Gs (4.0 mT)	6.5 cm
Remote	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 real danger to electronics and medical implants. These neodymiums produce a field that disrupts operation of sensitive medical devices. Notice: the invisible magnetic field penetrates the body and housings. Increased vigilance must be taken by people with hearing aids and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MPL 40x18x10 SH / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.95 km/h (6.38 m/s)	1.10 J
30 mm	36.78 km/h (10.22 m/s)	2.82 J
50 mm	47.37 km/h (13.16 m/s)	4.67 J
100 mm	66.97 km/h (18.60 m/s)	9.34 J

Magnetic elements are delicate – a violent impact against metal can result in shattering. Control the attraction moment – a magnet released freely turns into a projectile. Striking energy can cause material chips or injury to skin. Be sure to control the product during mounting so it doesn't hit with great force against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when handling with powerful specimens.

Table 9: Surface protection spec
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)

The following table defines the conditions under which this product can be safely used. Note the thickness of the protective layer.

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

Table 11: Hydrostatics and buoyancy
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%

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. However, remember the water resistance when pulling the rope quickly.

1. Vertical hold

*Caution: On a vertical surface, the magnet holds just a fraction of its max power.

2. Efficiency vs thickness

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

3. Heat tolerance

*For standard magnets, 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) = 0.43

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

Engineering data and GPSR

Elemental analysis

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

Sustainability

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

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

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

batch number/type

id: 020157-2026

Magnet Unit Converter

Force (pull)

Kilograms (kg)

Newtons (N)

Pounds (lbs)

Magnetic Induction

Induction (Gs)

Enter your figure in one of the inputs, to see the rest will update automatically.

Other deals

Product available Ships today (order by 14:00)

UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread

33.96 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 20x2 / N38 - cylindrical magnet

2.08 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UI 39x9x7 [BA] - badge holder

0.923 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 5x30 / N38 - cylindrical magnet

3.57 ZŁ brutto / pcs

This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 40x18x10 mm and a weight of 54 g, guarantees premium class connection. As a block magnet with high power (approx. 23.81 kg), this product is available immediately from our warehouse in Poland. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.

The key to success is shifting the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 40x18x10 SH / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. 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 generators and material handling systems. Thanks to the flat surface and high force (approx. 23.81 kg), they are ideal as closers in furniture making and mounting elements in automation. Customers often choose this model for hanging tools on strips and for advanced DIY and modeling projects, where precision and power count.

Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. 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.

The presented product is a neodymium magnet with precisely defined parameters: 40 mm (length), 18 mm (width), and 10 mm (thickness). 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 product meets the standards for N38 grade magnets.

Advantages and disadvantages of neodymium magnets.

Pros

Besides their tremendous field intensity, neodymium magnets offer the following advantages:

They do not lose strength, even after nearly ten years – the reduction in lifting capacity is only ~1% (according to tests),
They maintain their magnetic properties even under strong external field,
Thanks to the reflective finish, the surface of Ni-Cu-Ni, gold-plated, or silver gives an visually attractive appearance,
They show high magnetic induction at the operating surface, which increases their power,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of exact shaping as well as adapting to complex requirements,
Key role in modern technologies – they serve a role in data components, brushless drives, medical devices, and multitasking production systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Problematic aspects of neodymium magnets: tips and applications.

Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
When exposed to high temperature, neodymium magnets experience a drop in force. 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
They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Due to limitations in producing threads and complex shapes in magnets, we propose using casing - magnetic mount.
Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. It is also worth noting that small components of these devices can disrupt the diagnostic process medical when they are in the body.
Due to complex production process, their price exceeds standard values,

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what contributes to it?

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

using a sheet made of high-permeability steel, acting as a ideal flux conductor
whose transverse dimension is min. 10 mm
with a plane perfectly flat
with zero gap (without paint)
under perpendicular application of breakaway force (90-degree angle)
at room temperature

Lifting capacity in practice – influencing factors

In real-world applications, the actual lifting capacity results from many variables, presented from most significant:

Clearance – existence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
Base massiveness – too thin sheet does not close the flux, causing part of the flux to be escaped to the other side.
Metal type – different alloys attracts identically. High carbon content worsen the attraction effect.
Smoothness – ideal contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets

Handling guide

Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Maximum temperature

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Machining danger

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

Swallowing risk

These products are not toys. Accidental ingestion of several magnets can lead to them attracting across intestines, which constitutes a critical condition and requires immediate surgery.

Medical implants

Individuals with a pacemaker must keep an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Skin irritation risks

Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, avoid direct skin contact or choose versions in plastic housing.

Pinching danger

Pinching hazard: The attraction force is so great that it can cause hematomas, pinching, and broken bones. Protective gloves are recommended.

Compass and GPS

GPS units and mobile phones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Electronic hazard

Device Safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Material brittleness

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

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

MPL 40x18x10 SH / N38 - lamellar magnet

Technical details - MPL 40x18x10 SH / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the magnet - technical parameters

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

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

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MPL 40x18x10 SH / N38

Table 4: Steel thickness (substrate influence) - power losses MPL 40x18x10 SH / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MPL 40x18x10 SH / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MPL 40x18x10 SH / N38

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

Table 8: Impact energy (cracking risk) - warning MPL 40x18x10 SH / N38

Table 9: Surface protection spec MPL 40x18x10 SH / N38

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

Table 11: Hydrostatics and buoyancy MPL 40x18x10 SH / N38

1. Vertical hold

2. Efficiency vs thickness

3. Heat tolerance

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

Elemental analysis

Sustainability

Force (pull)

Magnetic Induction

Other deals

UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread

MW 20x2 / N38 - cylindrical magnet

UI 39x9x7 [BA] - badge holder

MW 5x30 / N38 - cylindrical magnet

Advantages and disadvantages of neodymium magnets.

Pros

Disadvantages

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what contributes to it?

Lifting capacity in practice – influencing factors

Safety rules for work with neodymium magnets

Handling guide

Maximum temperature

Machining danger

Swallowing risk

Medical implants

Skin irritation risks

Pinching danger

Compass and GPS

Electronic hazard

Material brittleness

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

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

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MPL 40x18x10 SH / N38

Table 4: Steel thickness (substrate influence) - power losses
MPL 40x18x10 SH / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 40x18x10 SH / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 40x18x10 SH / N38

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

Table 8: Impact energy (cracking risk) - warning
MPL 40x18x10 SH / N38

Table 9: Surface protection spec
MPL 40x18x10 SH / N38

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

Table 11: Hydrostatics and buoyancy
MPL 40x18x10 SH / N38