MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

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MPL 40x10x4x2[7/3.5] / 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 020151

GTIN/EAN: 5906301811572

length

40 mm [±0,1 mm]

Width

10 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

12 g

Magnetization Direction

↑ axial

Load capacity

9.31 kg / 91.33 N

Magnetic Induction

275.57 mT / 2756 Gs

Coating

[NiCuNi] Nickel

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9.21 ZŁ with VAT / pcs + price for transport

7.49 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

Specification / characteristics - MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

properties

properties	values
Cat. no.	020151
GTIN/EAN	5906301811572
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	10 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	12 g
Magnetization Direction	↑ axial
Load capacity ~ ?	9.31 kg / 91.33 N
Magnetic Induction ~ ?	275.57 mT / 2756 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x10x4x2[7/3.5] / 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

Engineering simulation of the magnet - data

The following information are the outcome of a engineering analysis. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Actual parameters may differ from theoretical values. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs gap) - characteristics
MPL 40x10x4x2[7/3.5] / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2755 Gs 275.5 mT	9.31 kg / 20.53 pounds 9310.0 g / 91.3 N	medium risk
1 mm	2413 Gs 241.3 mT	7.14 kg / 15.75 pounds 7143.1 g / 70.1 N	medium risk
2 mm	2044 Gs 204.4 mT	5.13 kg / 11.31 pounds 5128.9 g / 50.3 N	medium risk
3 mm	1703 Gs 170.3 mT	3.56 kg / 7.85 pounds 3559.5 g / 34.9 N	medium risk
5 mm	1173 Gs 117.3 mT	1.69 kg / 3.72 pounds 1688.2 g / 16.6 N	low risk
10 mm	522 Gs 52.2 mT	0.33 kg / 0.74 pounds 334.9 g / 3.3 N	low risk
15 mm	277 Gs 27.7 mT	0.09 kg / 0.21 pounds 94.2 g / 0.9 N	low risk
20 mm	163 Gs 16.3 mT	0.03 kg / 0.07 pounds 32.8 g / 0.3 N	low risk
30 mm	69 Gs 6.9 mT	0.01 kg / 0.01 pounds 5.8 g / 0.1 N	low risk
50 mm	19 Gs 1.9 mT	0.00 kg / 0.00 pounds 0.5 g / 0.0 N	low risk

Grip strength decreases significantly with every subsequent millimeter of spacing. Remember that even a very thin break (e.g., dirt, paint, dust) significantly weakens the grip. Neodymiums work optimally at the point of direct contact; air break kills the power. Analyze how flashily the load capacity drop, when the product does not touch directly to the steel surface. When designing the arrangement, discard additional spacers.

Table 2: Shear hold (vertical surface)
MPL 40x10x4x2[7/3.5] / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.86 kg / 4.11 pounds 1862.0 g / 18.3 N
1 mm	Stal (~0.2)	1.43 kg / 3.15 pounds 1428.0 g / 14.0 N
2 mm	Stal (~0.2)	1.03 kg / 2.26 pounds 1026.0 g / 10.1 N
3 mm	Stal (~0.2)	0.71 kg / 1.57 pounds 712.0 g / 7.0 N
5 mm	Stal (~0.2)	0.34 kg / 0.75 pounds 338.0 g / 3.3 N
10 mm	Stal (~0.2)	0.07 kg / 0.15 pounds 66.0 g / 0.6 N
15 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 18.0 g / 0.2 N
20 mm	Stal (~0.2)	0.01 kg / 0.01 pounds 6.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below shows the approximate shear load necessary to start the sliding of the magnet downwards along a upright steel wall (assuming standard friction). This value depends on the distance between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MPL 40x10x4x2[7/3.5] / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.79 kg / 6.16 pounds 2793.0 g / 27.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.86 kg / 4.11 pounds 1862.0 g / 18.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.93 kg / 2.05 pounds 931.0 g / 9.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	4.66 kg / 10.26 pounds 4655.0 g / 45.7 N

When hanging a holder on a upright wall (e.g., a board), it will only hold barely approx. 20%-30% of its maximum pull force. Gravity as well as a low friction coefficient influence the fact that products move down faster than they pop off the substrate. Designing a vertical fastening? Note that the sliding force is noticeably lower than the maximum static pull force. On a painted metal, the element will give way down under a significantly smaller load. Utilizing a rubberized coating can effectively increase the grip.

Table 4: Material efficiency (substrate influence) - power losses
MPL 40x10x4x2[7/3.5] / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.93 kg / 2.05 pounds 931.0 g / 9.1 N
1 mm	25%	2.33 kg / 5.13 pounds 2327.5 g / 22.8 N
2 mm	50%	4.66 kg / 10.26 pounds 4655.0 g / 45.7 N
3 mm	75%	6.98 kg / 15.39 pounds 6982.5 g / 68.5 N
5 mm	100%	9.31 kg / 20.53 pounds 9310.0 g / 91.3 N
10 mm	100%	9.31 kg / 20.53 pounds 9310.0 g / 91.3 N
11 mm	100%	9.31 kg / 20.53 pounds 9310.0 g / 91.3 N
12 mm	100%	9.31 kg / 20.53 pounds 9310.0 g / 91.3 N

A thin sheet cannot absorb the full magnetic flux, which wastes potential of the holder. If you mount a strong magnet to a too thin substrate, the field will penetrate right through and the pull force will drop sharply. To squeeze 100% of this neodymium's potential, you need a suitably thick backing of metal. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the product shows lower pull force. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 40x10x4x2[7/3.5] / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	9.31 kg / 20.53 pounds 9310.0 g / 91.3 N	OK
40 °C	-2.2%	9.11 kg / 20.07 pounds 9105.2 g / 89.3 N	OK
60 °C	-4.4%	8.90 kg / 19.62 pounds 8900.4 g / 87.3 N
80 °C	-6.6%	8.70 kg / 19.17 pounds 8695.5 g / 85.3 N
100 °C	-28.8%	6.63 kg / 14.61 pounds 6628.7 g / 65.0 N

Ordinary NdFeB products lose parameters after exceeding the maximum temperature. Protect against heat – high temperature can permanently destroy this product. With every degree above norm, the magnet's force briefly drops. Avoid using this magnet close to heaters higher than its safe range. Ignoring the limit will cause irreversible degradation of magnetism.

*Technical advisory: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low Pc) are more susceptible to demagnetization at lower temperatures compared to rod magnets. Red status in the table points to permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MPL 40x10x4x2[7/3.5] / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	18.71 kg / 41.25 pounds 4 164 Gs	2.81 kg / 6.19 pounds 2807 g / 27.5 N	N/A
1 mm	16.57 kg / 36.53 pounds 5 185 Gs	2.49 kg / 5.48 pounds 2486 g / 24.4 N	14.91 kg / 32.88 pounds ~0 Gs
2 mm	14.36 kg / 31.65 pounds 4 826 Gs	2.15 kg / 4.75 pounds 2153 g / 21.1 N	12.92 kg / 28.48 pounds ~0 Gs
3 mm	12.24 kg / 26.98 pounds 4 455 Gs	1.84 kg / 4.05 pounds 1836 g / 18.0 N	11.01 kg / 24.28 pounds ~0 Gs
5 mm	8.61 kg / 18.98 pounds 3 737 Gs	1.29 kg / 2.85 pounds 1291 g / 12.7 N	7.75 kg / 17.08 pounds ~0 Gs
10 mm	3.39 kg / 7.48 pounds 2 346 Gs	0.51 kg / 1.12 pounds 509 g / 5.0 N	3.05 kg / 6.73 pounds ~0 Gs
20 mm	0.67 kg / 1.48 pounds 1 045 Gs	0.10 kg / 0.22 pounds 101 g / 1.0 N	0.61 kg / 1.34 pounds ~0 Gs
50 mm	0.03 kg / 0.06 pounds 207 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs
60 mm	0.01 kg / 0.03 pounds 138 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs
70 mm	0.01 kg / 0.01 pounds 96 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.01 pounds 69 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 51 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 39 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums interact from a significantly greater distance than a magnet and sheet setup. Such a system of two magnets creates a more powerful interaction and a wider radius of operation. Designing a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Remember that when attracting two neodymiums, the collision energy is extreme. The levitation is slightly lower than the connection force, but still large.
*Flux density between like poles reaches ~0 Gs at the midpoint between the magnets (resulting from vector opposition).
Important: Estimates apply to sliding force of dual identical neodymium magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MPL 40x10x4x2[7/3.5] / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	8.5 cm
Hearing aid	10 Gs (1.0 mT)	6.5 cm
Mechanical watch	20 Gs (2.0 mT)	5.0 cm
Mobile device	40 Gs (4.0 mT)	4.0 cm
Remote	50 Gs (5.0 mT)	3.5 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field poses a large risk to electronic devices as well as pacemakers. These magnets produce a flux that destroys function of digital equipment. Remember: the invisible magnetic field acts through matter and housings. Special caution must be taken by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, speakers, and screens. Avoid contact with magnetic cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - collision effects
MPL 40x10x4x2[7/3.5] / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	28.72 km/h (7.98 m/s)	0.38 J
30 mm	48.67 km/h (13.52 m/s)	1.10 J
50 mm	62.82 km/h (17.45 m/s)	1.83 J
100 mm	88.83 km/h (24.68 m/s)	3.65 J

Magnetic elements are prone to chipping – a collision with steel can result in shattering. Control the attraction moment – a neodymium left loose becomes dangerous. Impact energy can trigger coating fragments or painful pinches to fingers. Be sure to control the product during mounting so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Use safety goggles when handling with powerful specimens.

Table 9: Surface protection spec
MPL 40x10x4x2[7/3.5] / 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MPL 40x10x4x2[7/3.5] / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	9 840 Mx	98.4 µWb
P_c Coefficient	0.26	Low (Flat)

Flux value passing through the pole surface. Essential parameter when building generators and motors. P_c value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MPL 40x10x4x2[7/3.5] / N38

Environment	Effective steel pull	Effect
Air (land)	9.31 kg	Standard
Water (riverbed)	10.66 kg (+1.35 kg buoyancy gain)	+14.5%

Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

*Note: On a vertical surface, the magnet retains merely ~20% of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) drastically weakens the holding force.

3. Temperature resistance

*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) = 0.26

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.

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%

Environmental data

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: 020151-2026

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This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 40x10x4 mm and a weight of 12 g, guarantees the highest quality connection. As a block magnet with high power (approx. 9.31 kg), this product is available immediately from our warehouse in Poland. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.

The key to success is sliding 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 40x10x4x2[7/3.5] / 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.

Plate magnets MPL 40x10x4x2[7/3.5] / N38 are the foundation for many industrial devices, such as filters catching filings and linear motors. Thanks to the flat surface and high force (approx. 9.31 kg), they are ideal as hidden locks 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. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Remember to clean and degrease 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. In practice, this means that this magnet has the greatest attraction force on its main planes (40x10 mm), which is ideal for flat mounting. 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), 10 mm (width), and 4 mm (thickness). The key parameter here is the holding force amounting to approximately 9.31 kg (force ~91.33 N), which, with such a compact shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Advantages and disadvantages of rare earth magnets.

Benefits

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

They retain magnetic properties for almost ten years – the loss is just ~1% (based on simulations),
They are extremely resistant to demagnetization induced by external field influence,
The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
Neodymium magnets ensure maximum magnetic induction on a small area, which allows for strong attraction,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Thanks to flexibility in constructing and the ability to customize to specific needs,
Fundamental importance in modern technologies – they are utilized in hard drives, brushless drives, advanced medical instruments, also modern systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
We recommend casing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex shapes.
Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these devices are able to complicate diagnosis medical when they are in the body.
Due to neodymium price, their price is relatively high,

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

The specified lifting capacity concerns the maximum value, measured under optimal environment, meaning:

on a block made of mild steel, perfectly concentrating the magnetic flux
with a cross-section of at least 10 mm
with an polished contact surface
under conditions of gap-free contact (metal-to-metal)
for force acting at a right angle (pull-off, not shear)
in neutral thermal conditions

Practical aspects of lifting capacity – factors

During everyday use, the actual holding force depends on several key aspects, ranked from crucial:

Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
Plate thickness – insufficiently thick steel does not accept the full field, causing part of the power to be lost to the other side.
Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate lowers the holding force.

Safety rules for work with neodymium magnets

Beware of splinters

Protect your eyes. Magnets can explode upon violent connection, launching shards into the air. Eye protection is mandatory.

Adults only

Product intended for adults. Small elements can be swallowed, causing severe trauma. Keep away from kids and pets.

Safe operation

Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Cards and drives

Very strong magnetic fields can erase data on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Impact on smartphones

An intense magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Keep magnets near a smartphone to avoid damaging the sensors.

Medical interference

People with a heart stimulator have to keep an absolute distance from magnets. The magnetism can interfere with the functioning of the implant.

Skin irritation risks

Studies show that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from direct skin contact or select encased magnets.

Dust explosion hazard

Powder generated during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Heat sensitivity

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Serious injuries

Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Use thick gloves.

Safety First! Need more info? Check our post: Why are neodymium magnets dangerous?

MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

Physical properties - MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the magnet - data

Table 1: Static force (force vs gap) - characteristics MPL 40x10x4x2[7/3.5] / N38

Table 2: Shear hold (vertical surface) MPL 40x10x4x2[7/3.5] / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MPL 40x10x4x2[7/3.5] / N38

Table 4: Material efficiency (substrate influence) - power losses MPL 40x10x4x2[7/3.5] / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MPL 40x10x4x2[7/3.5] / N38

Table 6: Two magnets (attraction) - field collision MPL 40x10x4x2[7/3.5] / N38

Table 7: Safety (HSE) (implants) - precautionary measures MPL 40x10x4x2[7/3.5] / N38

Table 8: Collisions (cracking risk) - collision effects MPL 40x10x4x2[7/3.5] / N38

Table 9: Surface protection spec MPL 40x10x4x2[7/3.5] / N38

Table 10: Electrical data (Pc) MPL 40x10x4x2[7/3.5] / N38

Table 11: Hydrostatics and buoyancy MPL 40x10x4x2[7/3.5] / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Temperature resistance

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

Chemical composition

Environmental data

Magnet pull force

Magnetic Induction

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Advantages and disadvantages of rare earth magnets.

Benefits

Disadvantages

Holding force characteristics

Magnetic strength at its maximum – what it depends on?

Practical aspects of lifting capacity – factors

Safety rules for work with neodymium magnets

Beware of splinters

Adults only

Safe operation

Cards and drives

Impact on smartphones

Medical interference

Skin irritation risks

Dust explosion hazard

Heat sensitivity

Serious injuries

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - characteristics
MPL 40x10x4x2[7/3.5] / N38

Table 2: Shear hold (vertical surface)
MPL 40x10x4x2[7/3.5] / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MPL 40x10x4x2[7/3.5] / N38

Table 4: Material efficiency (substrate influence) - power losses
MPL 40x10x4x2[7/3.5] / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MPL 40x10x4x2[7/3.5] / N38

Table 6: Two magnets (attraction) - field collision
MPL 40x10x4x2[7/3.5] / N38

Table 7: Safety (HSE) (implants) - precautionary measures
MPL 40x10x4x2[7/3.5] / N38

Table 8: Collisions (cracking risk) - collision effects
MPL 40x10x4x2[7/3.5] / N38

Table 9: Surface protection spec
MPL 40x10x4x2[7/3.5] / N38

Table 10: Electrical data (P_c)
MPL 40x10x4x2[7/3.5] / N38

Table 11: Hydrostatics and buoyancy
MPL 40x10x4x2[7/3.5] / N38