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MPL 30x5x5 / 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 020448

GTIN/EAN: 5906301811923

length

30 mm [±0,1 mm]

Width

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

5.63 g

Magnetization Direction

↑ axial

Load capacity

7.03 kg / 68.96 N

Magnetic Induction

446.27 mT / 4463 Gs

Coating

[NiCuNi] Nickel

see technical specifications »

4.15 ZŁ with VAT / pcs + price for transport

3.37 ZŁ net + 23% VAT / pcs

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Force along with structure of neodymium magnets can be calculated on our magnetic mass calculator.

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Technical parameters - MPL 30x5x5 / N38 - lamellar magnet

Specification / characteristics - MPL 30x5x5 / N38 - lamellar magnet

properties

properties	values
Cat. no.	020448
GTIN/EAN	5906301811923
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	30 mm [±0,1 mm]
Width	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	5.63 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.03 kg / 68.96 N
Magnetic Induction ~ ?	446.27 mT / 4463 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 30x5x5 / 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 assembly - report

The following values are the direct effect of a mathematical analysis. Values are based on algorithms for the class Nd₂Fe₁₄B. Operational parameters may differ from theoretical values. Treat these calculations as a supplementary guide during assembly planning.

Table 1: Static force (force vs gap) - power drop
MPL 30x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	4458 Gs 445.8 mT	7.03 kg / 15.50 pounds 7030.0 g / 69.0 N	strong
1 mm	3235 Gs 323.5 mT	3.70 kg / 8.16 pounds 3702.2 g / 36.3 N	strong
2 mm	2271 Gs 227.1 mT	1.82 kg / 4.02 pounds 1825.0 g / 17.9 N	safe
3 mm	1628 Gs 162.8 mT	0.94 kg / 2.07 pounds 937.0 g / 9.2 N	safe
5 mm	927 Gs 92.7 mT	0.30 kg / 0.67 pounds 304.2 g / 3.0 N	safe
10 mm	342 Gs 34.2 mT	0.04 kg / 0.09 pounds 41.4 g / 0.4 N	safe
15 mm	166 Gs 16.6 mT	0.01 kg / 0.02 pounds 9.7 g / 0.1 N	safe
20 mm	92 Gs 9.2 mT	0.00 kg / 0.01 pounds 3.0 g / 0.0 N	safe
30 mm	36 Gs 3.6 mT	0.00 kg / 0.00 pounds 0.5 g / 0.0 N	safe
50 mm	9 Gs 0.9 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe

Grip strength decreases drastically with every subsequent millimeter of spacing. Note that every additional insulation layer (e.g., dirt, varnish, rust) strongly weakens the grip. Magnets hold optimally at the point of direct contact; gap drastically cuts the power. Notice how quickly the parameters drop, when the product does not touch tightly to the steel surface. When designing the arrangement, eliminate redundant distances.

Table 2: Sliding load (vertical surface)
MPL 30x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.41 kg / 3.10 pounds 1406.0 g / 13.8 N
1 mm	Stal (~0.2)	0.74 kg / 1.63 pounds 740.0 g / 7.3 N
2 mm	Stal (~0.2)	0.36 kg / 0.80 pounds 364.0 g / 3.6 N
3 mm	Stal (~0.2)	0.19 kg / 0.41 pounds 188.0 g / 1.8 N
5 mm	Stal (~0.2)	0.06 kg / 0.13 pounds 60.0 g / 0.6 N
10 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data shows the approximate weight limit sufficient to initiate the slippage of the magnet down along a vertical steel plate (considering standard friction coefficient). The holding force depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 30x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.11 kg / 4.65 pounds 2109.0 g / 20.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.41 kg / 3.10 pounds 1406.0 g / 13.8 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.70 kg / 1.55 pounds 703.0 g / 6.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.52 kg / 7.75 pounds 3515.0 g / 34.5 N

When hanging a magnet on a upright surface (e.g., a car body), it will only hold only about 20%-30% of its maximum pull force. Gravitational force and a low friction coefficient influence the fact that magnets slide down faster than they detach. Want to create a vertical fastening? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a noticeably lighter weight. Utilizing a rubberized pad can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - power losses
MPL 30x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.70 kg / 1.55 pounds 703.0 g / 6.9 N
1 mm	25%	1.76 kg / 3.87 pounds 1757.5 g / 17.2 N
2 mm	50%	3.52 kg / 7.75 pounds 3515.0 g / 34.5 N
3 mm	75%	5.27 kg / 11.62 pounds 5272.5 g / 51.7 N
5 mm	100%	7.03 kg / 15.50 pounds 7030.0 g / 69.0 N
10 mm	100%	7.03 kg / 15.50 pounds 7030.0 g / 69.0 N
11 mm	100%	7.03 kg / 15.50 pounds 7030.0 g / 69.0 N
12 mm	100%	7.03 kg / 15.50 pounds 7030.0 g / 69.0 N

A thin sheet is not enough to conduct the full magnetic flux, which wastes potential of the magnet. If you mount a strong magnet to a too thin substrate, the flux will penetrate right through and the attraction force will be weaker. To utilize 100% of this magnet's potential, you need a suitably thick piece of steel. The material oversaturation causes that on delicate walls (e.g., appliance housings), the holder holds weaker. We recommend selecting the steel cross-section from these parameters.

Table 5: Working in heat (stability) - resistance threshold
MPL 30x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.03 kg / 15.50 pounds 7030.0 g / 69.0 N	OK
40 °C	-2.2%	6.88 kg / 15.16 pounds 6875.3 g / 67.4 N	OK
60 °C	-4.4%	6.72 kg / 14.82 pounds 6720.7 g / 65.9 N
80 °C	-6.6%	6.57 kg / 14.48 pounds 6566.0 g / 64.4 N
100 °C	-28.8%	5.01 kg / 11.03 pounds 5005.4 g / 49.1 N

Ordinary NdFeB products lose power past the thermal threshold. Watch out for overheating – high temperature can irreversibly destroy this magnet. As the temperature rises, the magnet's capacity temporarily decreases. Do not use this product close to heaters exceeding its working range. Ignoring the limit will lead to destruction of magnetism.

*Engineering note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) are more susceptible to demagnetization under lower heat stress than taller cylinders. The danger warning in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field collision
MPL 30x5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	18.38 kg / 40.52 pounds 5 383 Gs	2.76 kg / 6.08 pounds 2757 g / 27.0 N	N/A
1 mm	13.60 kg / 29.99 pounds 7 670 Gs	2.04 kg / 4.50 pounds 2040 g / 20.0 N	12.24 kg / 26.99 pounds ~0 Gs
2 mm	9.68 kg / 21.34 pounds 6 470 Gs	1.45 kg / 3.20 pounds 1452 g / 14.2 N	8.71 kg / 19.20 pounds ~0 Gs
3 mm	6.79 kg / 14.97 pounds 5 419 Gs	1.02 kg / 2.25 pounds 1018 g / 10.0 N	6.11 kg / 13.47 pounds ~0 Gs
5 mm	3.39 kg / 7.48 pounds 3 830 Gs	0.51 kg / 1.12 pounds 509 g / 5.0 N	3.05 kg / 6.73 pounds ~0 Gs
10 mm	0.80 kg / 1.75 pounds 1 855 Gs	0.12 kg / 0.26 pounds 119 g / 1.2 N	0.72 kg / 1.58 pounds ~0 Gs
20 mm	0.11 kg / 0.24 pounds 684 Gs	0.02 kg / 0.04 pounds 16 g / 0.2 N	0.10 kg / 0.21 pounds ~0 Gs
50 mm	0.00 kg / 0.01 pounds 111 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.00 pounds 72 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 49 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 34 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 25 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 19 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnetic products attract each other from a much further distance than a magnet and steel setup. The setup of two magnets produces a massive flux and a larger range of performance. Planning to create a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when bringing together two magnets, the impact force is massive. The repulsion force is a bit weaker than the connection force, but still impressive.
*The magnetic induction in repulsion mode reaches ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Attention: Calculations refer to sliding force of dual same magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - warnings
MPL 30x5x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	6.5 cm
Hearing aid	10 Gs (1.0 mT)	5.0 cm
Mechanical watch	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 poses a real danger to electronic devices as well as pacemakers. These neodymiums produce a field that prevents correct functioning of sensitive medical devices. Be aware: the unseen radiation passes through tissues and housings. Exceptional care must be exercised by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MPL 30x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	35.77 km/h (9.94 m/s)	0.28 J
30 mm	61.73 km/h (17.15 m/s)	0.83 J
50 mm	79.69 km/h (22.14 m/s)	1.38 J
100 mm	112.70 km/h (31.30 m/s)	2.76 J

NdFeB products are prone to chipping – a collision with steel can result in shattering. Watch the impact speed – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or dangerous crushing to skin. Always hold the magnet 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 playing with powerful specimens.

Table 9: Corrosion resistance
MPL 30x5x5 / 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 30x5x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 700 Mx	57.0 µWb
P_c Coefficient	0.46	Low (Flat)

Flux value emitted by the pole surface. Essential parameter in coil applications and motors. P_c value determines the magnet's operating point.

Table 11: Physics of underwater searching
MPL 30x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.03 kg	Standard
Water (riverbed)	8.05 kg (+1.02 kg buoyancy gain)	+14.5%

Corrosion 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

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

2. Efficiency vs thickness

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

3. Power loss vs temp

*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) = 0.46

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

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%

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: 020448-2026

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Model MPL 30x5x5 / N38 features a low profile and industrial pulling force, making it a perfect solution for building separators and machines. As a block magnet with high power (approx. 7.03 kg), this product is available immediately from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.

Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 7.03 kg can pinch very hard and cause hematomas. Using a screwdriver risks destroying the coating and permanently cracking the magnet.

Plate magnets MPL 30x5x5 / 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. 7.03 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.

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 roughen and wash the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.

Standardly, the MPL 30x5x5 / N38 model is magnetized axially (dimension 5 mm), which means that the N and S poles are located on its largest, flat surfaces. In practice, this means that this magnet has the greatest attraction force on its main planes (30x5 mm), which is ideal for flat mounting. Such a pole arrangement ensures maximum holding capacity when pressing against the sheet, creating a closed magnetic circuit.

This model is characterized by dimensions 30x5x5 mm, which, at a weight of 5.63 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 7.03 kg (force ~68.96 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Strengths and weaknesses of rare earth magnets.

Pros

Besides their exceptional pulling force, neodymium magnets offer the following advantages:

They do not lose strength, even over nearly 10 years – the decrease in power is only ~1% (theoretically),
They are noted for resistance to demagnetization induced by presence of other magnetic fields,
The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
Magnets possess impressive magnetic induction on the outer side,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures reaching 230°C and above...
Possibility of detailed modeling and optimizing to concrete needs,
Key role in modern technologies – they are used in mass storage devices, electric motors, medical devices, also other advanced devices.
Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of NdFeB magnets:

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength 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
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
Limited possibility of producing nuts in the magnet and complex shapes - preferred is casing - magnetic holder.
Potential hazard resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child health protection. Additionally, small components of these products can disrupt the diagnostic process medical when they are in the body.
With budget limitations the cost of neodymium magnets is economically unviable,

Holding force characteristics

Best holding force of the magnet in ideal parameters – what it depends on?

The load parameter shown represents the peak performance, obtained under ideal test conditions, meaning:

using a base made of mild steel, functioning as a circuit closing element
with a cross-section minimum 10 mm
with an ground contact surface
under conditions of gap-free contact (surface-to-surface)
under axial force vector (90-degree angle)
at ambient temperature room level

What influences lifting capacity in practice

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

Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Material composition – not every steel reacts the same. High carbon content worsen the attraction effect.
Surface condition – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal weaken the grip.
Thermal factor – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.

Safety rules for work with neodymium magnets

This is not a toy

Neodymium magnets are not intended for children. Accidental ingestion of a few magnets can lead to them pinching intestinal walls, which constitutes a critical condition and necessitates immediate surgery.

Crushing force

Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Powerful field

Handle with care. Neodymium magnets attract from a long distance and snap with huge force, often faster than you can react.

Demagnetization risk

Standard neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

ICD Warning

For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Nickel allergy

Nickel alert: The nickel-copper-nickel coating contains nickel. If an allergic reaction occurs, immediately stop handling magnets and use protective gear.

Combustion hazard

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

Beware of splinters

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Safe distance

Intense magnetic fields can destroy records on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Threat to navigation

Remember: rare earth magnets produce a field that disrupts sensitive sensors. Keep a separation from your phone, device, and GPS.

Warning! Learn more about hazards in the article: Safety of working with magnets.

MPL 30x5x5 / N38 - lamellar magnet

Technical parameters - MPL 30x5x5 / N38 - lamellar magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the assembly - report

Table 1: Static force (force vs gap) - power drop MPL 30x5x5 / N38

Table 2: Sliding load (vertical surface) MPL 30x5x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull MPL 30x5x5 / N38

Table 4: Steel thickness (substrate influence) - power losses MPL 30x5x5 / N38

Table 5: Working in heat (stability) - resistance threshold MPL 30x5x5 / N38

Table 6: Two magnets (attraction) - field collision MPL 30x5x5 / N38

Table 7: Safety (HSE) (implants) - warnings MPL 30x5x5 / N38

Table 8: Collisions (kinetic energy) - collision effects MPL 30x5x5 / N38

Table 9: Corrosion resistance MPL 30x5x5 / N38

Table 10: Construction data (Pc) MPL 30x5x5 / N38

Table 11: Physics of underwater searching MPL 30x5x5 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Power loss vs temp

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

Elemental analysis

Environmental data

Pulling force

Magnetic Induction

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Strengths and weaknesses of rare earth magnets.

Pros

Weaknesses

Holding force characteristics

Best holding force of the magnet in ideal parameters – what it depends on?

What influences lifting capacity in practice

Safety rules for work with neodymium magnets

This is not a toy

Crushing force

Powerful field

Demagnetization risk

ICD Warning

Nickel allergy

Combustion hazard

Beware of splinters

Safe distance

Threat to navigation

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - power drop
MPL 30x5x5 / N38

Table 2: Sliding load (vertical surface)
MPL 30x5x5 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MPL 30x5x5 / N38

Table 4: Steel thickness (substrate influence) - power losses
MPL 30x5x5 / N38

Table 5: Working in heat (stability) - resistance threshold
MPL 30x5x5 / N38

Table 6: Two magnets (attraction) - field collision
MPL 30x5x5 / N38

Table 7: Safety (HSE) (implants) - warnings
MPL 30x5x5 / N38

Table 8: Collisions (kinetic energy) - collision effects
MPL 30x5x5 / N38

Table 9: Corrosion resistance
MPL 30x5x5 / N38

Table 10: Construction data (P_c)
MPL 30x5x5 / N38

Table 11: Physics of underwater searching
MPL 30x5x5 / N38