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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

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6.84 ZŁ with VAT / pcs + price for transport

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Technical data - 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

Engineering simulation of the assembly - technical parameters

These information constitute the outcome of a mathematical simulation. Results rely on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may differ. Use these data as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - 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 pounds 3640.0 g / 35.7 N	strong
1 mm	1015 Gs 101.5 mT	3.48 kg / 7.67 pounds 3477.6 g / 34.1 N	strong
2 mm	980 Gs 98.0 mT	3.24 kg / 7.14 pounds 3240.7 g / 31.8 N	strong
3 mm	936 Gs 93.6 mT	2.95 kg / 6.51 pounds 2951.6 g / 29.0 N	strong
5 mm	827 Gs 82.7 mT	2.31 kg / 5.08 pounds 2305.8 g / 22.6 N	strong
10 mm	539 Gs 53.9 mT	0.98 kg / 2.16 pounds 981.0 g / 9.6 N	weak grip
15 mm	329 Gs 32.9 mT	0.37 kg / 0.80 pounds 365.1 g / 3.6 N	weak grip
20 mm	202 Gs 20.2 mT	0.14 kg / 0.30 pounds 137.9 g / 1.4 N	weak grip
30 mm	85 Gs 8.5 mT	0.02 kg / 0.05 pounds 24.6 g / 0.2 N	weak grip
50 mm	23 Gs 2.3 mT	0.00 kg / 0.00 pounds 1.8 g / 0.0 N	weak grip

Pulling power drops sharply with every subsequent millimeter of spacing. Remember that even a very thin break (e.g., contamination, paint, veneer) strongly weakens the grip. Magnetic products operate most effectively in perfect adhesion; distance weakens the force. Observe how rapidly the parameters fall, when the product does not touch flatly to the steel surface. When calculating the mounting, avoid unnecessary gaps.

Table 2: Slippage load (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 pounds 728.0 g / 7.1 N
1 mm	Stal (~0.2)	0.70 kg / 1.53 pounds 696.0 g / 6.8 N
2 mm	Stal (~0.2)	0.65 kg / 1.43 pounds 648.0 g / 6.4 N
3 mm	Stal (~0.2)	0.59 kg / 1.30 pounds 590.0 g / 5.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.02 pounds 462.0 g / 4.5 N
10 mm	Stal (~0.2)	0.20 kg / 0.43 pounds 196.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.16 pounds 74.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 28.0 g / 0.3 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The table below indicates the theoretical force needed to initiate the slippage of the magnet down along a upright metal surface (considering typical friction coefficient). This parameter is a function of the distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
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 pounds 1092.0 g / 10.7 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.73 kg / 1.60 pounds 728.0 g / 7.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.36 kg / 0.80 pounds 364.0 g / 3.6 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.82 kg / 4.01 pounds 1820.0 g / 17.9 N

When placing a element on a upright plane (e.g., a car body), it will only hold only about 1/5 of its nominal power. Gravity and a weak degree of grip influence the fact that products slide down easier than they detach. Want to create a wall mount? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a painted metal, the magnet will slide down under a noticeably lighter cargo. Utilizing a rubberized coating can effectively increase the grip.

Table 4: Material efficiency (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 pounds 364.0 g / 3.6 N
1 mm	25%	0.91 kg / 2.01 pounds 910.0 g / 8.9 N
2 mm	50%	1.82 kg / 4.01 pounds 1820.0 g / 17.9 N
3 mm	75%	2.73 kg / 6.02 pounds 2730.0 g / 26.8 N
5 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N
10 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N
11 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N
12 mm	100%	3.64 kg / 8.02 pounds 3640.0 g / 35.7 N

A thin sheet cannot conduct the full magnetic flux, which wastes potential of the magnet. Should you install a neodymium to a thin surface, the magnetism will penetrate right through and the attraction force will be weaker. To squeeze the maximum of this neodymium's potential, you need a suitably thick piece of steel. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the holder holds weaker. We recommend selecting the steel dimension from these parameters.

Table 5: Working in heat (stability) - resistance threshold
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 pounds 3640.0 g / 35.7 N	OK
40 °C	-2.2%	3.56 kg / 7.85 pounds 3559.9 g / 34.9 N	OK
60 °C	-4.4%	3.48 kg / 7.67 pounds 3479.8 g / 34.1 N
80 °C	-6.6%	3.40 kg / 7.50 pounds 3399.8 g / 33.4 N
100 °C	-28.8%	2.59 kg / 5.71 pounds 2591.7 g / 25.4 N

Classic neodymiums change their properties power above the temperature limit. Protect against heat – excessive heat can irreversibly damage this magnet. With increasing heat, the neodymium's capacity momentarily drops. Do not use this magnet close to heaters exceeding its operating temperature limit. Too high temperature will lead to permanent loss of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) risk losing magnetic properties at lower temperatures than long magnets. The danger warning in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 30x7/3x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.96 kg / 8.73 pounds 1 995 Gs	0.59 kg / 1.31 pounds 594 g / 5.8 N	N/A
1 mm	3.88 kg / 8.56 pounds 2 058 Gs	0.58 kg / 1.28 pounds 582 g / 5.7 N	3.49 kg / 7.70 pounds ~0 Gs
2 mm	3.78 kg / 8.34 pounds 2 031 Gs	0.57 kg / 1.25 pounds 567 g / 5.6 N	3.40 kg / 7.50 pounds ~0 Gs
3 mm	3.66 kg / 8.07 pounds 1 998 Gs	0.55 kg / 1.21 pounds 549 g / 5.4 N	3.30 kg / 7.26 pounds ~0 Gs
5 mm	3.37 kg / 7.43 pounds 1 918 Gs	0.51 kg / 1.12 pounds 506 g / 5.0 N	3.04 kg / 6.69 pounds ~0 Gs
10 mm	2.51 kg / 5.53 pounds 1 654 Gs	0.38 kg / 0.83 pounds 376 g / 3.7 N	2.26 kg / 4.97 pounds ~0 Gs
20 mm	1.07 kg / 2.35 pounds 1 079 Gs	0.16 kg / 0.35 pounds 160 g / 1.6 N	0.96 kg / 2.12 pounds ~0 Gs
50 mm	0.06 kg / 0.13 pounds 258 Gs	0.01 kg / 0.02 pounds 9 g / 0.1 N	0.05 kg / 0.12 pounds ~0 Gs
60 mm	0.03 kg / 0.06 pounds 171 Gs	0.00 kg / 0.01 pounds 4 g / 0.0 N	0.02 kg / 0.05 pounds ~0 Gs
70 mm	0.01 kg / 0.03 pounds 118 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.03 pounds ~0 Gs
80 mm	0.01 kg / 0.01 pounds 84 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.01 pounds 62 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 47 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 significantly greater distance than a magnet and sheet setup. The setup of two magnets creates a more powerful interaction and a further horizon of operation. Planning to create a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Exercise caution that when bringing together two magnets, the collision energy is massive. The levitation is slightly lower than the connection force, but still impressive.
*The magnetic induction in repulsion mode drops to ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Note: Estimates apply to friction force of a pair of matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (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
Mechanical watch	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 poses a real danger to electronics as well as medical implants. These neodymiums produce a flux that prevents correct functioning of digital equipment. Remember: the unseen radiation passes through tissues and plastic. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (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

Neodymium magnets are very brittle – a strong collision with metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Impact energy can trigger coating fragments or painful pinches to skin. Always hold the magnet during mounting so it doesn't hit with great force against the steel surface. A collision at high speed ends with a crack of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Coating parameters (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)

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

Table 10: Electrical data (P_c)
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 pole surface. Key data in coil applications as well as sensors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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!

Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Note: On a vertical wall, the magnet holds just ~20% of its nominal pull.

2. Steel saturation

*Thin steel (e.g. computer case) drastically limits the holding force.

3. Temperature resistance

*For N38 material, the safety 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

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%

Ecology and recycling (GPSR)

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

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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. This product with a force of 3.64 kg works great as a cabinet closure, speaker holder, or mounting element in devices.

This is a crucial issue when working with model MP 30x7/3x3 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. 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 easily scratched when tightening the screw, which will become a corrosion focus. This product is dedicated for indoor use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 7/3 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

It is a magnetic ring with a diameter of 30 mm and thickness 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.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths as well as weaknesses of neodymium magnets.

Pros

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

They have unchanged lifting capacity, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
They maintain their magnetic properties even under close interference source,
A magnet with a metallic gold surface looks better,
They feature high magnetic induction at the operating surface, which affects their effectiveness,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
In view of the ability of free shaping and customization to individualized solutions, NdFeB magnets can be produced in a variety of forms and dimensions, which amplifies use scope,
Huge importance in modern technologies – they serve a role in HDD drives, electric motors, precision medical tools, also multitasking production systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Problematic aspects of neodymium magnets: application proposals

At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Due to limitations in realizing threads and complex forms in magnets, we propose using cover - magnetic holder.
Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical in case of swallowing.
Due to complex production process, their price exceeds standard values,

Holding force characteristics

Highest magnetic holding force – what contributes to it?

The load parameter shown represents the peak performance, recorded under ideal test conditions, specifically:

using a base made of mild steel, serving as a circuit closing element
possessing a massiveness of minimum 10 mm to avoid saturation
characterized by smoothness
with zero gap (no coatings)
for force acting at a right angle (in the magnet axis)
at ambient temperature approx. 20 degrees Celsius

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the application force will differ depending on elements below, in order of importance:

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
Steel grade – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate reduces the holding force.

Safe handling of neodymium magnets

Fragile material

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

ICD Warning

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Heat sensitivity

Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. This process is irreversible.

Magnetic interference

GPS units and smartphones are highly susceptible to magnetism. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Immense force

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

Protect data

Equipment safety: Neodymium magnets can damage data carriers and delicate electronics (heart implants, medical aids, mechanical watches).

This is not a toy

NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Metal Allergy

Some people experience a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Extended handling can result in dermatitis. We strongly advise wear protective gloves.

Physical harm

Large magnets can crush fingers in a fraction of a second. Do not place your hand betwixt two strong magnets.

Machining danger

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

Caution! Need more info? Read our article: Why are neodymium magnets dangerous?

MP 30x7/3x3 / N38 - ring magnet

Technical data - MP 30x7/3x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the assembly - technical parameters

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

Table 2: Slippage load (vertical surface) MP 30x7/3x3 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MP 30x7/3x3 / N38

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

Table 5: Working in heat (stability) - resistance threshold MP 30x7/3x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MP 30x7/3x3 / N38

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

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

Table 9: Coating parameters (durability) MP 30x7/3x3 / N38

Table 10: Electrical data (Pc) MP 30x7/3x3 / N38

Table 11: Underwater work (magnet fishing) MP 30x7/3x3 / N38

1. Sliding resistance

2. Steel saturation

3. Temperature resistance

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

Elemental analysis

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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Strengths as well as weaknesses of neodymium magnets.

Pros

Cons

Holding force characteristics

Highest magnetic holding force – what contributes to it?

Impact of factors on magnetic holding capacity in practice

Safe handling of neodymium magnets

Fragile material

ICD Warning

Heat sensitivity

Magnetic interference

Immense force

Protect data

This is not a toy

Metal Allergy

Physical harm

Machining danger

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Slippage load (vertical surface)
MP 30x7/3x3 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 30x7/3x3 / N38

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

Table 5: Working in heat (stability) - resistance threshold
MP 30x7/3x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 30x7/3x3 / N38

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

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

Table 9: Coating parameters (durability)
MP 30x7/3x3 / N38

Table 10: Electrical data (P_c)
MP 30x7/3x3 / N38

Table 11: Underwater work (magnet fishing)
MP 30x7/3x3 / N38