MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Product on order Ships in 3-5 days

MPL 40x20x4x2[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 020159

GTIN/EAN: 5906301811657

5.00

length

40 mm [±0,1 mm]

Width

20 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

24 g

Magnetization Direction

↑ axial

Load capacity

7.52 kg / 73.80 N

Magnetic Induction

168.28 mT / 1683 Gs

Coating

[NiCuNi] Nickel

check properties »

17.96 ZŁ with VAT / pcs + price for transport

14.60 ZŁ net + 23% VAT / pcs

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Physical properties - MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Specification / characteristics - MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

properties

properties	values
Cat. no.	020159
GTIN/EAN	5906301811657
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	20 mm [±0,1 mm]
Height	4 mm [±0,1 mm]
Weight	24 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.52 kg / 73.80 N
Magnetic Induction ~ ?	168.28 mT / 1683 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 40x20x4x2[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

Physical modeling of the magnet - report

These data constitute the direct effect of a physical simulation. Values are based on models for the class Nd₂Fe₁₄B. Operational conditions may differ from theoretical values. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (pull vs gap) - power drop
MPL 40x20x4x2[7/3.5] / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1683 Gs 168.3 mT	7.52 kg / 16.58 lbs 7520.0 g / 73.8 N	medium risk
1 mm	1613 Gs 161.3 mT	6.91 kg / 15.24 lbs 6913.8 g / 67.8 N	medium risk
2 mm	1524 Gs 152.4 mT	6.17 kg / 13.61 lbs 6172.9 g / 60.6 N	medium risk
3 mm	1423 Gs 142.3 mT	5.38 kg / 11.86 lbs 5379.4 g / 52.8 N	medium risk
5 mm	1207 Gs 120.7 mT	3.87 kg / 8.53 lbs 3869.8 g / 38.0 N	medium risk
10 mm	744 Gs 74.4 mT	1.47 kg / 3.24 lbs 1469.3 g / 14.4 N	low risk
15 mm	455 Gs 45.5 mT	0.55 kg / 1.21 lbs 550.7 g / 5.4 N	low risk
20 mm	288 Gs 28.8 mT	0.22 kg / 0.49 lbs 220.3 g / 2.2 N	low risk
30 mm	129 Gs 12.9 mT	0.04 kg / 0.10 lbs 44.4 g / 0.4 N	low risk
50 mm	38 Gs 3.8 mT	0.00 kg / 0.01 lbs 3.8 g / 0.0 N	low risk

Pulling power decreases drastically with every subsequent millimeter of gap. Keep in mind that every additional insulation layer (e.g., dirt, paint, rust) strongly weakens the grip. Neodymiums work optimally during direct contact; gap kills the power. Analyze how quickly the pull force fall, when the product does not touch directly to the steel surface. When calculating the mounting, discard redundant distances.

Table 2: Vertical force (wall)
MPL 40x20x4x2[7/3.5] / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.50 kg / 3.32 lbs 1504.0 g / 14.8 N
1 mm	Stal (~0.2)	1.38 kg / 3.05 lbs 1382.0 g / 13.6 N
2 mm	Stal (~0.2)	1.23 kg / 2.72 lbs 1234.0 g / 12.1 N
3 mm	Stal (~0.2)	1.08 kg / 2.37 lbs 1076.0 g / 10.6 N
5 mm	Stal (~0.2)	0.77 kg / 1.71 lbs 774.0 g / 7.6 N
10 mm	Stal (~0.2)	0.29 kg / 0.65 lbs 294.0 g / 2.9 N
15 mm	Stal (~0.2)	0.11 kg / 0.24 lbs 110.0 g / 1.1 N
20 mm	Stal (~0.2)	0.04 kg / 0.10 lbs 44.0 g / 0.4 N
30 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 8.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The following data indicates the estimated weight limit needed to initiate the shifting of the magnet vertically against a vertical metal surface (considering standard friction). This value depends on the distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x20x4x2[7/3.5] / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.26 kg / 4.97 lbs 2256.0 g / 22.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.50 kg / 3.32 lbs 1504.0 g / 14.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.75 kg / 1.66 lbs 752.0 g / 7.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.76 kg / 8.29 lbs 3760.0 g / 36.9 N

When hanging a magnet on a vertical wall (e.g., a board), it you can count on barely about 1/5 of nominal attraction strength. Gravity and a low friction coefficient mean that holders move down easier than they pop off the substrate. Planning a hanger? Consider that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the element will give way down under a much lighter cargo. Application of an anti-slip pad can drastically improve the result.

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 40x20x4x2[7/3.5] / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.75 kg / 1.66 lbs 752.0 g / 7.4 N
1 mm	25%	1.88 kg / 4.14 lbs 1880.0 g / 18.4 N
2 mm	50%	3.76 kg / 8.29 lbs 3760.0 g / 36.9 N
3 mm	75%	5.64 kg / 12.43 lbs 5640.0 g / 55.3 N
5 mm	100%	7.52 kg / 16.58 lbs 7520.0 g / 73.8 N
10 mm	100%	7.52 kg / 16.58 lbs 7520.0 g / 73.8 N
11 mm	100%	7.52 kg / 16.58 lbs 7520.0 g / 73.8 N
12 mm	100%	7.52 kg / 16.58 lbs 7520.0 g / 73.8 N

A too thin steel is not enough to conduct the full magnetic flux, which wastes potential of the holder. Should you mount a strong magnet to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To squeeze 100% of this neodymium's power, you require a sufficiently solid element of steel. The material oversaturation means that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - resistance threshold
MPL 40x20x4x2[7/3.5] / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.52 kg / 16.58 lbs 7520.0 g / 73.8 N	OK
40 °C	-2.2%	7.35 kg / 16.21 lbs 7354.6 g / 72.1 N	OK
60 °C	-4.4%	7.19 kg / 15.85 lbs 7189.1 g / 70.5 N
80 °C	-6.6%	7.02 kg / 15.48 lbs 7023.7 g / 68.9 N
100 °C	-28.8%	5.35 kg / 11.80 lbs 5354.2 g / 52.5 N

Classic neodymiums lose parameters above the temperature limit. Avoid high temperatures – heat can irreversibly damage this magnet. With every degree above norm, the magnet's power briefly lowers. Avoid using this magnet near heat sources higher than its working range. Ignoring the limit will lead to irreversible degradation of magnetic properties.

*Technical advisory: Heat tolerance is determined by both grade, but also on the magnet's shape. Thin magnets (pancake types) risk losing magnetic properties at lower temperatures compared to rod magnets. Red status in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - field collision
MPL 40x20x4x2[7/3.5] / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	13.96 kg / 30.78 lbs 2 997 Gs	2.09 kg / 4.62 lbs 2094 g / 20.5 N	N/A
1 mm	13.44 kg / 29.64 lbs 3 302 Gs	2.02 kg / 4.45 lbs 2017 g / 19.8 N	12.10 kg / 26.68 lbs ~0 Gs
2 mm	12.84 kg / 28.30 lbs 3 227 Gs	1.93 kg / 4.25 lbs 1926 g / 18.9 N	11.55 kg / 25.47 lbs ~0 Gs
3 mm	12.17 kg / 26.83 lbs 3 142 Gs	1.83 kg / 4.02 lbs 1826 g / 17.9 N	10.95 kg / 24.15 lbs ~0 Gs
5 mm	10.73 kg / 23.65 lbs 2 950 Gs	1.61 kg / 3.55 lbs 1609 g / 15.8 N	9.66 kg / 21.29 lbs ~0 Gs
10 mm	7.19 kg / 15.84 lbs 2 414 Gs	1.08 kg / 2.38 lbs 1078 g / 10.6 N	6.47 kg / 14.26 lbs ~0 Gs
20 mm	2.73 kg / 6.01 lbs 1 487 Gs	0.41 kg / 0.90 lbs 409 g / 4.0 N	2.46 kg / 5.41 lbs ~0 Gs
50 mm	0.18 kg / 0.39 lbs 379 Gs	0.03 kg / 0.06 lbs 27 g / 0.3 N	0.16 kg / 0.35 lbs ~0 Gs
60 mm	0.08 kg / 0.18 lbs 259 Gs	0.01 kg / 0.03 lbs 12 g / 0.1 N	0.07 kg / 0.16 lbs ~0 Gs
70 mm	0.04 kg / 0.09 lbs 183 Gs	0.01 kg / 0.01 lbs 6 g / 0.1 N	0.04 kg / 0.08 lbs ~0 Gs
80 mm	0.02 kg / 0.05 lbs 133 Gs	0.00 kg / 0.01 lbs 3 g / 0.0 N	0.02 kg / 0.04 lbs ~0 Gs
90 mm	0.01 kg / 0.03 lbs 99 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.02 lbs ~0 Gs
100 mm	0.01 kg / 0.02 lbs 76 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two magnets attract each other from a much further distance than a magnet and steel combination. The setup of magnet-to-magnet generates a stronger field and a further horizon of operation. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Remember that when connecting a pair of magnets, the pinch force is huge. The repulsion force is a bit weaker than the connection force, but still impressive.
*Flux density in repulsion mode drops to ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Important: Figures apply to friction force of a pair of matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (electronics) - warnings
MPL 40x20x4x2[7/3.5] / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.5 cm
Hearing aid	10 Gs (1.0 mT)	8.5 cm
Mechanical watch	20 Gs (2.0 mT)	6.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	5.0 cm
Remote	50 Gs (5.0 mT)	4.5 cm
Payment card	400 Gs (40.0 mT)	2.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field poses a serious hazard to electronics as well as pacemakers. These neodymiums generate a field that disrupts operation of digital equipment. Notice: the invisible magnetic field passes through tissues and housings. Special caution must be taken by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, remotes, speakers, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MPL 40x20x4x2[7/3.5] / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	19.91 km/h (5.53 m/s)	0.37 J
30 mm	31.03 km/h (8.62 m/s)	0.89 J
50 mm	39.93 km/h (11.09 m/s)	1.48 J
100 mm	56.45 km/h (15.68 m/s)	2.95 J

Magnetic elements are prone to chipping – a collision with steel can result in shattering. Watch the impact speed – a neodymium left loose turns into a projectile. Striking energy can destroy the magnet or injury to skin. Be sure to control the product during installation so it doesn't slam with momentum against the steel surface. A collision at high speed ends with a crack of the neodymium. Wear eye protection when handling with large magnets.

Table 9: Surface protection spec
MPL 40x20x4x2[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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (P_c)
MPL 40x20x4x2[7/3.5] / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	15 299 Mx	153.0 µWb
P_c Coefficient	0.19	Low (Flat)

Total magnetic flux emitted by the pole surface. Essential parameter when building generators and motors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MPL 40x20x4x2[7/3.5] / N38

Environment	Effective steel pull	Effect
Air (land)	7.52 kg	Standard
Water (riverbed)	8.61 kg (+1.09 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.

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Caution: On a vertical wall, the magnet holds only a fraction of its perpendicular strength.

2. Efficiency vs thickness

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

3. Power loss vs temp

*For N38 grade, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.19

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%

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: 020159-2026

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Model MPL 40x20x4x2[7/3.5] / N38 features a flat shape and industrial pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 73.80 N is ready for shipment in 24h, allowing for rapid realization of your project. Additionally, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.

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 7.52 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. 7.52 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 40x20x4x2[7/3.5] / N38, we recommend utilizing strong epoxy glues (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. 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. In practice, this means that this magnet has the greatest attraction force on its main planes (40x20 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), 20 mm (width), and 4 mm (thickness). The key parameter here is the holding force amounting to approximately 7.52 kg (force ~73.80 N), which, with such a flat shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Pros as well as cons of rare earth magnets.

Benefits

Apart from their superior power, neodymium magnets have these key benefits:

They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
Magnets effectively protect themselves against demagnetization caused by foreign field sources,
By using a smooth coating of silver, the element gains an professional look,
Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of custom creating as well as modifying to atypical conditions,
Significant place in advanced technology sectors – they are utilized in magnetic memories, brushless drives, advanced medical instruments, and modern systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Characteristics of disadvantages of neodymium magnets and ways of using them

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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
Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
Limited possibility of producing threads in the magnet and complex shapes - recommended is casing - magnet mounting.
Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child safety. Furthermore, small components of these magnets are able to complicate diagnosis medical after entering the body.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what affects it?

The specified lifting capacity concerns the peak performance, measured under laboratory conditions, meaning:

on a block made of structural steel, perfectly concentrating the magnetic flux
whose transverse dimension equals approx. 10 mm
characterized by smoothness
without any air gap between the magnet and steel
for force applied at a right angle (in the magnet axis)
at room temperature

Determinants of lifting force in real conditions

Real force is affected by specific conditions, mainly (from most important):

Gap between magnet and steel – every millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
Angle of force application – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically several times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
Material type – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
Smoothness – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.

Precautions when working with NdFeB magnets

Precision electronics

Navigation devices and smartphones are highly sensitive to magnetic fields. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Warning for heart patients

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

Immense force

Before use, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Adults only

These products are not toys. Eating multiple magnets can lead to them attracting across intestines, which poses a severe health hazard and requires immediate surgery.

Risk of cracking

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.

Thermal limits

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

Threat to electronics

Do not bring magnets near a wallet, computer, or screen. The magnetism can permanently damage these devices and erase data from cards.

Skin irritation risks

Certain individuals have a contact allergy to Ni, which is the standard coating for NdFeB magnets. Frequent touching might lead to an allergic reaction. We suggest use safety gloves.

Hand protection

Pinching hazard: The pulling power is so immense that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Mechanical processing

Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

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

MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Physical properties - MPL 40x20x4x2[7/3.5] / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - report

Table 1: Static force (pull vs gap) - power drop MPL 40x20x4x2[7/3.5] / N38

Table 2: Vertical force (wall) MPL 40x20x4x2[7/3.5] / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MPL 40x20x4x2[7/3.5] / N38

Table 4: Material efficiency (saturation) - sheet metal selection MPL 40x20x4x2[7/3.5] / N38

Table 5: Thermal resistance (stability) - resistance threshold MPL 40x20x4x2[7/3.5] / N38

Table 6: Two magnets (repulsion) - field collision MPL 40x20x4x2[7/3.5] / N38

Table 7: Protective zones (electronics) - warnings MPL 40x20x4x2[7/3.5] / N38

Table 8: Collisions (cracking risk) - collision effects MPL 40x20x4x2[7/3.5] / N38

Table 9: Surface protection spec MPL 40x20x4x2[7/3.5] / N38

Table 10: Construction data (Pc) MPL 40x20x4x2[7/3.5] / N38

Table 11: Underwater work (magnet fishing) MPL 40x20x4x2[7/3.5] / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Power loss vs temp

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

Chemical composition

Sustainability

Pulling force

Magnetic Induction

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Pros as well as cons of rare earth magnets.

Benefits

Cons

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what affects it?

Determinants of lifting force in real conditions

Precautions when working with NdFeB magnets

Precision electronics

Warning for heart patients

Immense force

Adults only

Risk of cracking

Thermal limits

Threat to electronics

Skin irritation risks

Hand protection

Mechanical processing

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - power drop
MPL 40x20x4x2[7/3.5] / N38

Table 2: Vertical force (wall)
MPL 40x20x4x2[7/3.5] / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MPL 40x20x4x2[7/3.5] / N38

Table 4: Material efficiency (saturation) - sheet metal selection
MPL 40x20x4x2[7/3.5] / N38

Table 5: Thermal resistance (stability) - resistance threshold
MPL 40x20x4x2[7/3.5] / N38

Table 6: Two magnets (repulsion) - field collision
MPL 40x20x4x2[7/3.5] / N38

Table 7: Protective zones (electronics) - warnings
MPL 40x20x4x2[7/3.5] / N38

Table 8: Collisions (cracking risk) - collision effects
MPL 40x20x4x2[7/3.5] / N38

Table 9: Surface protection spec
MPL 40x20x4x2[7/3.5] / N38

Table 10: Construction data (P_c)
MPL 40x20x4x2[7/3.5] / N38

Table 11: Underwater work (magnet fishing)
MPL 40x20x4x2[7/3.5] / N38