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MP 30x7/3x3 / N38 - ring 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

ring magnet

Catalog no 030250

GTIN/EAN: 5906301812265

5.00

Diameter

30 mm [±0,1 mm]

internal diameter Ø

7/3 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

15.75 g

Magnetization Direction

↑ axial

Load capacity

3.64 kg / 35.69 N

Magnetic Induction

121.58 mT / 1216 Gs

Coating

[NiCuNi] Nickel

check technical specifications »

6.84 ZŁ with VAT / pcs + price for transport

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Detailed specification - MP 30x7/3x3 / N38 - ring magnet

Specification / characteristics - MP 30x7/3x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030250
GTIN/EAN	5906301812265
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter	30 mm [±0,1 mm]
internal diameter Ø	7/3 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	15.75 g
Magnetization Direction	↑ axial
Load capacity ~ ?	3.64 kg / 35.69 N
Magnetic Induction ~ ?	121.58 mT / 1216 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 30x7/3x3 / N38 - ring 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 product - data

Presented data represent the direct effect of a engineering analysis. Results are based on algorithms for the material Nd₂Fe₁₄B. Operational parameters may differ. Treat these data as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs gap) - power drop
MP 30x7/3x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1039 Gs 103.9 mT	3.64 kg / 8.02 lbs 3640.0 g / 35.7 N	strong
1 mm	1015 Gs 101.5 mT	3.48 kg / 7.67 lbs 3477.6 g / 34.1 N	strong
2 mm	980 Gs 98.0 mT	3.24 kg / 7.14 lbs 3240.7 g / 31.8 N	strong
3 mm	936 Gs 93.6 mT	2.95 kg / 6.51 lbs 2951.6 g / 29.0 N	strong
5 mm	827 Gs 82.7 mT	2.31 kg / 5.08 lbs 2305.8 g / 22.6 N	strong
10 mm	539 Gs 53.9 mT	0.98 kg / 2.16 lbs 981.0 g / 9.6 N	safe
15 mm	329 Gs 32.9 mT	0.37 kg / 0.80 lbs 365.1 g / 3.6 N	safe
20 mm	202 Gs 20.2 mT	0.14 kg / 0.30 lbs 137.9 g / 1.4 N	safe
30 mm	85 Gs 8.5 mT	0.02 kg / 0.05 lbs 24.6 g / 0.2 N	safe
50 mm	23 Gs 2.3 mT	0.00 kg / 0.00 lbs 1.8 g / 0.0 N	safe

Pulling power weakens drastically per each millimeter of gap. Remember that even the smallest gap (e.g., contamination, paint, rust) significantly reduces the pull force. Magnets work strongest at the point of direct contact; air break weakens the power. Observe how quickly the parameters plummet, when the product does not adhere tightly to the metal substrate. When designing the assembly, discard unnecessary gaps.

Table 2: Vertical force (vertical surface)
MP 30x7/3x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.73 kg / 1.60 lbs 728.0 g / 7.1 N
1 mm	Stal (~0.2)	0.70 kg / 1.53 lbs 696.0 g / 6.8 N
2 mm	Stal (~0.2)	0.65 kg / 1.43 lbs 648.0 g / 6.4 N
3 mm	Stal (~0.2)	0.59 kg / 1.30 lbs 590.0 g / 5.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.02 lbs 462.0 g / 4.5 N
10 mm	Stal (~0.2)	0.20 kg / 0.43 lbs 196.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.16 lbs 74.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 28.0 g / 0.3 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The table below calculates the theoretical force required to cause the slippage of the magnet down along a upright metal surface (considering standard friction). The holding force varies with the separation distance between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MP 30x7/3x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.09 kg / 2.41 lbs 1092.0 g / 10.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.73 kg / 1.60 lbs 728.0 g / 7.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.36 kg / 0.80 lbs 364.0 g / 3.6 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.82 kg / 4.01 lbs 1820.0 g / 17.9 N

When mounting a holder on a vertical surface (e.g., a board), it you can count on only approx. 20%-30% of nominal attraction strength. Gravity as well as a weak degree of grip cause that magnets move down faster than they detach. Want to create a hanger? Consider that the sliding force is significantly lower than the maximum static pull force. On a slippery surface, the magnet will give way down under a significantly smaller cargo. Application of an anti-slip layer can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 30x7/3x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.36 kg / 0.80 lbs 364.0 g / 3.6 N
1 mm	25%	0.91 kg / 2.01 lbs 910.0 g / 8.9 N
2 mm	50%	1.82 kg / 4.01 lbs 1820.0 g / 17.9 N
3 mm	75%	2.73 kg / 6.02 lbs 2730.0 g / 26.8 N
5 mm	100%	3.64 kg / 8.02 lbs 3640.0 g / 35.7 N
10 mm	100%	3.64 kg / 8.02 lbs 3640.0 g / 35.7 N
11 mm	100%	3.64 kg / 8.02 lbs 3640.0 g / 35.7 N
12 mm	100%	3.64 kg / 8.02 lbs 3640.0 g / 35.7 N

A thin metal plate is incapable of focus the full magnetic flux, which wastes potential of the magnet. Should you install a neodymium to a too thin substrate, the field will penetrate right through and the pull force will drop sharply. To utilize full efficiency of this neodymium's power, you need a suitably thick element of metal. The saturation phenomenon means that on thin elements (e.g., thin profiles), the magnet shows lower pull force. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal stability (stability) - power drop
MP 30x7/3x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	3.64 kg / 8.02 lbs 3640.0 g / 35.7 N	OK
40 °C	-2.2%	3.56 kg / 7.85 lbs 3559.9 g / 34.9 N	OK
60 °C	-4.4%	3.48 kg / 7.67 lbs 3479.8 g / 34.1 N
80 °C	-6.6%	3.40 kg / 7.50 lbs 3399.8 g / 33.4 N
100 °C	-28.8%	2.59 kg / 5.71 lbs 2591.7 g / 25.4 N

Ordinary NdFeB products lose power after exceeding the maximum temperature. Avoid high temperatures – excessive heat can permanently demagnetize this magnet. As the temperature rises, the neodymium's force briefly drops. Refrain from using this product in hot environments exceeding its working range. Exceeding the critical threshold will lead to permanent loss of magnetic properties.

*Engineering note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (pancake types) are more susceptible to demagnetization sooner than long magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 30x7/3x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.96 kg / 8.73 lbs 1 995 Gs	0.59 kg / 1.31 lbs 594 g / 5.8 N	N/A
1 mm	3.88 kg / 8.56 lbs 2 058 Gs	0.58 kg / 1.28 lbs 582 g / 5.7 N	3.49 kg / 7.70 lbs ~0 Gs
2 mm	3.78 kg / 8.34 lbs 2 031 Gs	0.57 kg / 1.25 lbs 567 g / 5.6 N	3.40 kg / 7.50 lbs ~0 Gs
3 mm	3.66 kg / 8.07 lbs 1 998 Gs	0.55 kg / 1.21 lbs 549 g / 5.4 N	3.30 kg / 7.26 lbs ~0 Gs
5 mm	3.37 kg / 7.43 lbs 1 918 Gs	0.51 kg / 1.12 lbs 506 g / 5.0 N	3.04 kg / 6.69 lbs ~0 Gs
10 mm	2.51 kg / 5.53 lbs 1 654 Gs	0.38 kg / 0.83 lbs 376 g / 3.7 N	2.26 kg / 4.97 lbs ~0 Gs
20 mm	1.07 kg / 2.35 lbs 1 079 Gs	0.16 kg / 0.35 lbs 160 g / 1.6 N	0.96 kg / 2.12 lbs ~0 Gs
50 mm	0.06 kg / 0.13 lbs 258 Gs	0.01 kg / 0.02 lbs 9 g / 0.1 N	0.05 kg / 0.12 lbs ~0 Gs
60 mm	0.03 kg / 0.06 lbs 171 Gs	0.00 kg / 0.01 lbs 4 g / 0.0 N	0.02 kg / 0.05 lbs ~0 Gs
70 mm	0.01 kg / 0.03 lbs 118 Gs	0.00 kg / 0.00 lbs 2 g / 0.0 N	0.01 kg / 0.03 lbs ~0 Gs
80 mm	0.01 kg / 0.01 lbs 84 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
90 mm	0.00 kg / 0.01 lbs 62 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
100 mm	0.00 kg / 0.00 lbs 47 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums interact from a much further distance than a magnet and sheet setup. Such a system of two magnets generates a stronger field and a wider radius of performance. Planning to create a strong closure? Apply two magnets instead of a neodymium and a steel. Exercise caution that when connecting a pair of magnets, the impact force is extreme. The levitation is marginally weaker than the connection force, but still impressive.
*The magnetic induction for N-N configuration is approximately ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
* Calculations demonstrate friction force of a pair of identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (implants) - precautionary measures
MP 30x7/3x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	9.0 cm
Hearing aid	10 Gs (1.0 mT)	7.0 cm
Timepiece	20 Gs (2.0 mT)	5.5 cm
Mobile device	40 Gs (4.0 mT)	4.5 cm
Remote	50 Gs (5.0 mT)	4.0 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 is a large risk to electronics and pacemakers. These NdFeB products produce a flux that disrupts operation of digital equipment. Notice: the unseen radiation acts through matter and plastic. Special caution must be taken by people with hearing aids and insulin pumps. Also at risk are: mechanical watches, car keys, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MP 30x7/3x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	17.73 km/h (4.92 m/s)	0.19 J
30 mm	26.67 km/h (7.41 m/s)	0.43 J
50 mm	34.29 km/h (9.53 m/s)	0.71 J
100 mm	48.48 km/h (13.47 m/s)	1.43 J

Magnetic elements are very brittle – a violent impact against metal risks their cracking. 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 installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when working with powerful specimens.

Table 9: Anti-corrosion coating durability
MP 30x7/3x3 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MP 30x7/3x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	8 395 Mx	84.0 µWb
P_c Coefficient	0.13	Low (Flat)

Total magnetic flux passing through the magnet pole. Key data when building generators and motors. The P_c coefficient determines the magnet's operating point.

Table 11: Physics of underwater searching
MP 30x7/3x3 / N38

Environment	Effective steel pull	Effect
Air (land)	3.64 kg	Standard
Water (riverbed)	4.17 kg (+0.53 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!

Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Caution: On a vertical wall, the magnet retains only ~20% of its max power.

2. Steel thickness impact

*Thin steel (e.g. computer case) severely weakens the holding force.

3. Temperature resistance

*For standard magnets, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.13

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

Engineering data and GPSR

Material specification

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: 030250-2026

Measurement Calculator

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The ring magnet with a hole MP 30x7/3x3 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. In the place of the mounting hole, the coating is thinner and can be damaged when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 7/3 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø30 mm (outer diameter) and height 3 mm. The key parameter here is the holding force amounting to approximately 3.64 kg (force ~35.69 N). The mounting hole diameter is precisely 7/3 mm.

The poles are located on the planes with holes, not on the sides of the ring. In the case of connecting two rings, make sure one is turned the right way. We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Advantages and disadvantages of neodymium magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

Their strength remains stable, and after approximately ten years it decreases only by ~1% (according to research),
They have excellent resistance to weakening of magnetic properties due to external fields,
In other words, due to the shiny finish of nickel, the element gains a professional look,
They are known for high magnetic induction at the operating surface, which improves attraction properties,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of individual forming as well as adjusting to complex needs,
Significant place in electronics industry – they are utilized in hard drives, drive modules, medical equipment, also other advanced devices.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets and proposals for their use:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
We suggest casing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated shapes.
Health risk to health – tiny shards of magnets are risky, if swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these devices are able to disrupt the diagnostic process medical in case of swallowing.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

The force parameter is a measurement result conducted under standard conditions:

with the application of a yoke made of special test steel, ensuring full magnetic saturation
possessing a massiveness of minimum 10 mm to avoid saturation
with a surface cleaned and smooth
without the slightest air gap between the magnet and steel
during detachment in a direction perpendicular to the plane
at standard ambient temperature

What influences lifting capacity in practice

It is worth knowing that the application force may be lower depending on the following factors, starting with the most relevant:

Air gap (betwixt the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
Direction of force – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Material composition – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was assessed with the use of a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the holding force.

Precautions when working with neodymium magnets

Flammability

Machining of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Nickel allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease handling magnets and wear gloves.

Magnetic media

Device Safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, timepieces).

This is not a toy

Neodymium magnets are not suitable for play. Eating multiple magnets may result in them pinching intestinal walls, which poses a critical condition and necessitates immediate surgery.

GPS Danger

GPS units and mobile phones are highly susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Bodily injuries

Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.

Handling rules

Use magnets consciously. Their huge power can surprise even experienced users. Be vigilant and respect their force.

Implant safety

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

Do not overheat magnets

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

Eye protection

NdFeB magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets leads to them cracking into small pieces.

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

MP 30x7/3x3 / N38 - ring magnet

Detailed specification - MP 30x7/3x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the product - data

Table 1: Static pull force (pull vs gap) - power drop MP 30x7/3x3 / N38

Table 2: Vertical force (vertical surface) MP 30x7/3x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 30x7/3x3 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 30x7/3x3 / N38

Table 5: Thermal stability (stability) - power drop MP 30x7/3x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MP 30x7/3x3 / N38

Table 7: Protective zones (implants) - precautionary measures MP 30x7/3x3 / N38

Table 8: Dynamics (kinetic energy) - collision effects MP 30x7/3x3 / N38

Table 9: Anti-corrosion coating durability MP 30x7/3x3 / N38

Table 10: Construction data (Flux) MP 30x7/3x3 / N38

Table 11: Physics of underwater searching MP 30x7/3x3 / N38

1. Vertical hold

2. Steel thickness impact

3. Temperature resistance

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

Material specification

Environmental data

Force (pull)

Magnetic Field

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Advantages and disadvantages of neodymium magnets.

Pros

Weaknesses

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

What influences lifting capacity in practice

Precautions when working with neodymium magnets

Flammability

Nickel allergy

Magnetic media

This is not a toy

GPS Danger

Bodily injuries

Handling rules

Implant safety

Do not overheat magnets

Eye protection

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - power drop
MP 30x7/3x3 / N38

Table 2: Vertical force (vertical surface)
MP 30x7/3x3 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 30x7/3x3 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 30x7/3x3 / N38

Table 5: Thermal stability (stability) - power drop
MP 30x7/3x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 30x7/3x3 / N38

Table 7: Protective zones (implants) - precautionary measures
MP 30x7/3x3 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MP 30x7/3x3 / N38

Table 9: Anti-corrosion coating durability
MP 30x7/3x3 / N38

Table 10: Construction data (Flux)
MP 30x7/3x3 / N38

Table 11: Physics of underwater searching
MP 30x7/3x3 / N38