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MPL 40x7x3 / 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 020162

GTIN/EAN: 5906301811688

5.00

length

40 mm [±0,1 mm]

Width

7 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

6.3 g

Magnetization Direction

↑ axial

Load capacity

7.14 kg / 70.02 N

Magnetic Induction

284.46 mT / 2845 Gs

Coating

[NiCuNi] Nickel

check properties »

2.79 ZŁ with VAT / pcs + price for transport

2.27 ZŁ net + 23% VAT / pcs

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Technical data - MPL 40x7x3 / N38 - lamellar magnet

Specification / characteristics - MPL 40x7x3 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020162
GTIN/EAN	5906301811688
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	7 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	6.3 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.14 kg / 70.02 N
Magnetic Induction ~ ?	284.46 mT / 2845 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x7x3 / 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 - technical parameters

These data constitute the outcome of a engineering analysis. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Actual conditions might slightly differ from theoretical values. Treat these calculations as a supplementary guide for designers.

Table 1: Static force (force vs gap) - power drop
MPL 40x7x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2843 Gs 284.3 mT	7.14 kg / 15.74 LBS 7140.0 g / 70.0 N	warning
1 mm	2314 Gs 231.4 mT	4.73 kg / 10.43 LBS 4729.9 g / 46.4 N	warning
2 mm	1788 Gs 178.8 mT	2.83 kg / 6.23 LBS 2825.3 g / 27.7 N	warning
3 mm	1365 Gs 136.5 mT	1.65 kg / 3.63 LBS 1645.1 g / 16.1 N	safe
5 mm	824 Gs 82.4 mT	0.60 kg / 1.32 LBS 599.2 g / 5.9 N	safe
10 mm	317 Gs 31.7 mT	0.09 kg / 0.20 LBS 88.6 g / 0.9 N	safe
15 mm	160 Gs 16.0 mT	0.02 kg / 0.05 LBS 22.5 g / 0.2 N	safe
20 mm	92 Gs 9.2 mT	0.01 kg / 0.02 LBS 7.5 g / 0.1 N	safe
30 mm	38 Gs 3.8 mT	0.00 kg / 0.00 LBS 1.3 g / 0.0 N	safe
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 LBS 0.1 g / 0.0 N	safe

Pulling power drops drastically with every subsequent millimeter of distance. Keep in mind that even the smallest gap (e.g., contamination, paint, veneer) noticeably diminishes the holding power. Magnets operate optimally during direct contact; distance drastically cuts the power. See how rapidly the parameters fall, when the magnet does not adhere tightly to the metal substrate. When planning the arrangement, avoid unnecessary gaps.

Table 2: Shear load (vertical surface)
MPL 40x7x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.43 kg / 3.15 LBS 1428.0 g / 14.0 N
1 mm	Stal (~0.2)	0.95 kg / 2.09 LBS 946.0 g / 9.3 N
2 mm	Stal (~0.2)	0.57 kg / 1.25 LBS 566.0 g / 5.6 N
3 mm	Stal (~0.2)	0.33 kg / 0.73 LBS 330.0 g / 3.2 N
5 mm	Stal (~0.2)	0.12 kg / 0.26 LBS 120.0 g / 1.2 N
10 mm	Stal (~0.2)	0.02 kg / 0.04 LBS 18.0 g / 0.2 N
15 mm	Stal (~0.2)	0.00 kg / 0.01 LBS 4.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

This section defines the theoretical force required to start the shifting of the magnet down against a upright steel plate (assuming standard friction coefficient). This value varies with the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x7x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.14 kg / 4.72 LBS 2142.0 g / 21.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.43 kg / 3.15 LBS 1428.0 g / 14.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.71 kg / 1.57 LBS 714.0 g / 7.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.57 kg / 7.87 LBS 3570.0 g / 35.0 N

When mounting a magnet on a vertical wall (e.g., a car body), it will only hold just approx. 20%-30% of its maximum pull force. Gravity and a weak degree of grip mean that products slip faster than they detach. Designing a vertical fastening? Note that the sliding force is significantly lower than the perpendicular breakaway force. On a painted metal, the holder will slip down under a noticeably lighter weight. Utilizing a rubberized layer can drastically raise the stability.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 40x7x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.71 kg / 1.57 LBS 714.0 g / 7.0 N
1 mm	25%	1.79 kg / 3.94 LBS 1785.0 g / 17.5 N
2 mm	50%	3.57 kg / 7.87 LBS 3570.0 g / 35.0 N
3 mm	75%	5.35 kg / 11.81 LBS 5355.0 g / 52.5 N
5 mm	100%	7.14 kg / 15.74 LBS 7140.0 g / 70.0 N
10 mm	100%	7.14 kg / 15.74 LBS 7140.0 g / 70.0 N
11 mm	100%	7.14 kg / 15.74 LBS 7140.0 g / 70.0 N
12 mm	100%	7.14 kg / 15.74 LBS 7140.0 g / 70.0 N

A thin metal plate is incapable of take in the entire magnetic field, which wastes potential of the holder. Should you attach a powerful product to a weak sheet, the magnetism will pass right through and the pull force will drop sharply. To achieve 100% of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation phenomenon means that on thin elements (e.g., thin profiles), the holder works worse. We advise picking the steel cross-section based on the following data.

Table 5: Thermal stability (material behavior) - power drop
MPL 40x7x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.14 kg / 15.74 LBS 7140.0 g / 70.0 N	OK
40 °C	-2.2%	6.98 kg / 15.39 LBS 6982.9 g / 68.5 N	OK
60 °C	-4.4%	6.83 kg / 15.05 LBS 6825.8 g / 67.0 N
80 °C	-6.6%	6.67 kg / 14.70 LBS 6668.8 g / 65.4 N
100 °C	-28.8%	5.08 kg / 11.21 LBS 5083.7 g / 49.9 N

Classic neodymiums irreversibly lose power past the thermal threshold. Protect against heat – heat can irreversibly damage this product. With increasing heat, the magnet's power momentarily drops. Avoid using this product near heat sources higher than its operating temperature limit. Exceeding the critical threshold will result in destruction of magnetism.

*Important note: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (pancake types) risk losing magnetic properties under lower heat stress compared to rod magnets. 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 40x7x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	13.95 kg / 30.75 LBS 4 204 Gs	2.09 kg / 4.61 LBS 2092 g / 20.5 N	N/A
1 mm	11.58 kg / 25.53 LBS 5 180 Gs	1.74 kg / 3.83 LBS 1737 g / 17.0 N	10.42 kg / 22.98 LBS ~0 Gs
2 mm	9.24 kg / 20.37 LBS 4 628 Gs	1.39 kg / 3.06 LBS 1386 g / 13.6 N	8.32 kg / 18.34 LBS ~0 Gs
3 mm	7.19 kg / 15.86 LBS 4 083 Gs	1.08 kg / 2.38 LBS 1079 g / 10.6 N	6.47 kg / 14.27 LBS ~0 Gs
5 mm	4.21 kg / 9.28 LBS 3 124 Gs	0.63 kg / 1.39 LBS 632 g / 6.2 N	3.79 kg / 8.36 LBS ~0 Gs
10 mm	1.17 kg / 2.58 LBS 1 647 Gs	0.18 kg / 0.39 LBS 176 g / 1.7 N	1.05 kg / 2.32 LBS ~0 Gs
20 mm	0.17 kg / 0.38 LBS 633 Gs	0.03 kg / 0.06 LBS 26 g / 0.3 N	0.16 kg / 0.34 LBS ~0 Gs
50 mm	0.01 kg / 0.01 LBS 115 Gs	0.00 kg / 0.00 LBS 1 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
60 mm	0.00 kg / 0.01 LBS 76 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
70 mm	0.00 kg / 0.00 LBS 53 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
80 mm	0.00 kg / 0.00 LBS 38 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
90 mm	0.00 kg / 0.00 LBS 28 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.00 kg / 0.00 LBS 21 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two strong neodymiums attract each other from a significantly greater distance than a neodymium and metal combination. Such a system of magnet-to-magnet creates a more powerful interaction and a wider radius of performance. Want to build a strong closure? Apply two magnets instead of one magnet and a steel. Exercise caution that when connecting a pair of magnets, the collision energy is extreme. The levitation is marginally weaker than the connection force, but still large.
*Flux density in repulsion mode is approximately ~0 Gs at the midpoint between the magnets (due to field cancellation).
Note: Results demonstrate friction force of two same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (implants) - precautionary measures
MPL 40x7x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.0 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Timepiece	20 Gs (2.0 mT)	4.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.0 cm
Remote	50 Gs (5.0 mT)	3.0 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field is a real danger to electronics as well as pacemakers. These magnets produce a flux that destroys function of sensitive medical devices. Remember: the invisible magnetic field passes through tissues and housings. Special caution must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, car keys, membranes, and screens. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MPL 40x7x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	34.21 km/h (9.50 m/s)	0.28 J
30 mm	58.81 km/h (16.34 m/s)	0.84 J
50 mm	75.92 km/h (21.09 m/s)	1.40 J
100 mm	107.36 km/h (29.82 m/s)	2.80 J

Magnetic elements are prone to chipping – a collision with steel causes immediate chipping. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Striking energy can destroy the magnet or painful pinches to skin. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear safety glasses when working with large magnets.

Table 9: Coating parameters (durability)
MPL 40x7x3 / 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. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MPL 40x7x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	6 379 Mx	63.8 µWb
P_c Coefficient	0.24	Low (Flat)

Flux value emitted by the pole surface. Essential parameter for generator designers and motors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 40x7x3 / N38

Environment	Effective steel pull	Effect
Air (land)	7.14 kg	Standard
Water (riverbed)	8.18 kg (+1.04 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.

1. Shear force

*Warning: On a vertical surface, the magnet holds only ~20% of its max power.

2. Efficiency vs thickness

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

3. Thermal stability

*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) = 0.24

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 and environmental data

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: 020162-2026

Measurement Calculator

Force (pull)

Kilograms (kg)

Force (N)

lbs

Magnetic Induction

Induction (Gs)

Input a value in one of the inputs, and the rest convert in real-time.

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This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 40x7x3 mm and a weight of 6.3 g, guarantees premium class connection. This rectangular block with a force of 70.02 N is ready for shipment in 24h, allowing for rapid realization of your project. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.

Separating strong flat 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 7.14 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

They constitute a key element in the production of generators and material handling systems. Thanks to the flat surface and high force (approx. 7.14 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.

For mounting flat magnets MPL 40x7x3 / N38, it is best to use two-component adhesives (e.g., UHU Endfest, Distal), which ensure a durable bond with metal or plastic. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).

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. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.

This model is characterized by dimensions 40x7x3 mm, which, at a weight of 6.3 g, makes it an element with impressive energy density. The key parameter here is the lifting capacity amounting to approximately 7.14 kg (force ~70.02 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Pros and cons of neodymium magnets.

Advantages

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

They virtually do not lose power, because even after 10 years the performance loss is only ~1% (according to literature),
They show high resistance to demagnetization induced by external magnetic fields,
In other words, due to the reflective layer of silver, the element is aesthetically pleasing,
The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to modularity in designing and the ability to customize to complex applications,
Versatile presence in high-tech industry – they serve a role in HDD drives, electric motors, medical equipment, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in miniature devices

Disadvantages

Disadvantages of neodymium magnets:

Brittleness 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 recommend our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
Limited ability of making threads in the magnet and complex shapes - recommended is a housing - magnet mounting.
Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
Due to neodymium price, their price is higher than average,

Pull force analysis

Highest magnetic holding force – what affects it?

Breakaway force was determined for ideal contact conditions, taking into account:

using a sheet made of mild steel, serving as a circuit closing element
possessing a thickness of minimum 10 mm to avoid saturation
characterized by even structure
without the slightest clearance between the magnet and steel
during detachment in a direction perpendicular to the plane
at standard ambient temperature

Lifting capacity in real conditions – factors

Holding efficiency is influenced by specific conditions, including (from priority):

Air gap (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of maximum force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
Surface quality – the more even the surface, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was measured with the use of a smooth 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 small distance between the magnet’s surface and the plate lowers the holding force.

Warnings

Risk of cracking

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets leads to them shattering into shards.

Threat to navigation

A strong magnetic field negatively affects the operation of magnetometers in phones and GPS navigation. Maintain magnets near a smartphone to prevent damaging the sensors.

Crushing risk

Large magnets can crush fingers instantly. Do not put your hand betwixt two attracting surfaces.

Power loss in heat

Do not overheat. NdFeB magnets are sensitive to temperature. If you require operation above 80°C, look for special high-temperature series (H, SH, UH).

Keep away from computers

Avoid bringing magnets close to a purse, computer, or screen. The magnetism can permanently damage these devices and wipe information from cards.

Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction appears, cease handling magnets and use protective gear.

This is not a toy

Only for adults. Tiny parts can be swallowed, leading to serious injuries. Store out of reach of kids and pets.

Warning for heart patients

For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or ask another person to work with the magnets.

Powerful field

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

Mechanical processing

Fire hazard: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.

Attention! Looking for details? Check our post: Are neodymium magnets dangerous?

MPL 40x7x3 / N38 - lamellar magnet

Technical data - MPL 40x7x3 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the magnet - technical parameters

Table 1: Static force (force vs gap) - power drop MPL 40x7x3 / N38

Table 2: Shear load (vertical surface) MPL 40x7x3 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MPL 40x7x3 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MPL 40x7x3 / N38

Table 5: Thermal stability (material behavior) - power drop MPL 40x7x3 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision MPL 40x7x3 / N38

Table 7: Safety (HSE) (implants) - precautionary measures MPL 40x7x3 / N38

Table 8: Dynamics (kinetic energy) - collision effects MPL 40x7x3 / N38

Table 9: Coating parameters (durability) MPL 40x7x3 / N38

Table 10: Construction data (Flux) MPL 40x7x3 / N38

Table 11: Underwater work (magnet fishing) MPL 40x7x3 / N38

1. Shear force

2. Efficiency vs thickness

3. Thermal stability

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

Elemental analysis

Sustainability

Force (pull)

Magnetic Induction

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Pros and cons of neodymium magnets.

Advantages

Disadvantages

Pull force analysis

Highest magnetic holding force – what affects it?

Lifting capacity in real conditions – factors

Warnings

Risk of cracking

Threat to navigation

Crushing risk

Power loss in heat

Keep away from computers

Nickel allergy

This is not a toy

Warning for heart patients

Powerful field

Mechanical processing

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - power drop
MPL 40x7x3 / N38

Table 2: Shear load (vertical surface)
MPL 40x7x3 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x7x3 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 40x7x3 / N38

Table 5: Thermal stability (material behavior) - power drop
MPL 40x7x3 / N38

Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 40x7x3 / N38

Table 7: Safety (HSE) (implants) - precautionary measures
MPL 40x7x3 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MPL 40x7x3 / N38

Table 9: Coating parameters (durability)
MPL 40x7x3 / N38

Table 10: Construction data (Flux)
MPL 40x7x3 / N38

Table 11: Underwater work (magnet fishing)
MPL 40x7x3 / N38