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MP 12x8/4x3 / 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 030395

GTIN/EAN: 5906301812326

5.00

Diameter

12 mm [±0,1 mm]

internal diameter Ø

8/4 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

2.26 g

Magnetization Direction

↑ axial

Load capacity

2.21 kg / 21.72 N

Magnetic Induction

277.09 mT / 2771 Gs

Coating

[NiCuNi] Nickel

technical details »

1.427 ZŁ with VAT / pcs + price for transport

1.160 ZŁ net + 23% VAT / pcs

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Parameters and shape of neodymium magnets can be analyzed with our modular calculator.

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Technical details - MP 12x8/4x3 / N38 - ring magnet

Specification / characteristics - MP 12x8/4x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030395
GTIN/EAN	5906301812326
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	12 mm [±0,1 mm]
internal diameter Ø	8/4 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	2.26 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.21 kg / 21.72 N
Magnetic Induction ~ ?	277.09 mT / 2771 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 12x8/4x3 / 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

Technical analysis of the magnet - technical parameters

The following values represent the direct effect of a mathematical calculation. Values rely on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may differ. Treat these data as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs distance) - power drop
MP 12x8/4x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2423 Gs 242.3 mT	2.21 kg / 4.87 pounds 2210.0 g / 21.7 N	strong
1 mm	2138 Gs 213.8 mT	1.72 kg / 3.79 pounds 1720.7 g / 16.9 N	low risk
2 mm	1786 Gs 178.6 mT	1.20 kg / 2.65 pounds 1200.5 g / 11.8 N	low risk
3 mm	1437 Gs 143.7 mT	0.78 kg / 1.71 pounds 777.8 g / 7.6 N	low risk
5 mm	885 Gs 88.5 mT	0.29 kg / 0.65 pounds 294.7 g / 2.9 N	low risk
10 mm	277 Gs 27.7 mT	0.03 kg / 0.06 pounds 28.9 g / 0.3 N	low risk
15 mm	110 Gs 11.0 mT	0.00 kg / 0.01 pounds 4.6 g / 0.0 N	low risk
20 mm	53 Gs 5.3 mT	0.00 kg / 0.00 pounds 1.1 g / 0.0 N	low risk
30 mm	18 Gs 1.8 mT	0.00 kg / 0.00 pounds 0.1 g / 0.0 N	low risk
50 mm	4 Gs 0.4 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	low risk

Magnetic force weakens significantly per each millimeter of distance. Keep in mind that even a microscopic distance (e.g., dirt, varnish, dust) strongly diminishes the holding power. Neodymiums work strongest during direct contact; distance nullifies the force. Observe how rapidly the parameters plummet, when the product does not adhere flatly to the metal substrate. When planning the assembly, avoid redundant distances.

Table 2: Shear hold (wall)
MP 12x8/4x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.44 kg / 0.97 pounds 442.0 g / 4.3 N
1 mm	Stal (~0.2)	0.34 kg / 0.76 pounds 344.0 g / 3.4 N
2 mm	Stal (~0.2)	0.24 kg / 0.53 pounds 240.0 g / 2.4 N
3 mm	Stal (~0.2)	0.16 kg / 0.34 pounds 156.0 g / 1.5 N
5 mm	Stal (~0.2)	0.06 kg / 0.13 pounds 58.0 g / 0.6 N
10 mm	Stal (~0.2)	0.01 kg / 0.01 pounds 6.0 g / 0.1 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 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 defines the estimated holding capacity sufficient to cause the downward movement of the magnet vertically against a upright steel plate (assuming standard friction coefficient). The holding force varies with the distance between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MP 12x8/4x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.66 kg / 1.46 pounds 663.0 g / 6.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.44 kg / 0.97 pounds 442.0 g / 4.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.22 kg / 0.49 pounds 221.0 g / 2.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.11 kg / 2.44 pounds 1105.0 g / 10.8 N

When hanging a magnet on a upright wall (e.g., a board), it will maintain barely about 20%-30% of nominal attraction strength. Gravity and a weak degree of grip cause that holders slide down faster than they pop off the substrate. Want to create a hanger? Consider that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the holder will slip down under a noticeably lighter cargo. Utilizing a rubberized pad can significantly raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 12x8/4x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.22 kg / 0.49 pounds 221.0 g / 2.2 N
1 mm	25%	0.55 kg / 1.22 pounds 552.5 g / 5.4 N
2 mm	50%	1.11 kg / 2.44 pounds 1105.0 g / 10.8 N
3 mm	75%	1.66 kg / 3.65 pounds 1657.5 g / 16.3 N
5 mm	100%	2.21 kg / 4.87 pounds 2210.0 g / 21.7 N
10 mm	100%	2.21 kg / 4.87 pounds 2210.0 g / 21.7 N
11 mm	100%	2.21 kg / 4.87 pounds 2210.0 g / 21.7 N
12 mm	100%	2.21 kg / 4.87 pounds 2210.0 g / 21.7 N

A thin sheet is unable to conduct the entire magnetic field, which wastes potential of the magnet. If you attach a powerful product to a too thin substrate, the magnetism will pass right through and the holding will be smaller. To squeeze the maximum of this magnet's power, you require a sufficiently solid piece of metal. The material oversaturation means that on thin elements (e.g., appliance housings), the holder holds weaker. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MP 12x8/4x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.21 kg / 4.87 pounds 2210.0 g / 21.7 N	OK
40 °C	-2.2%	2.16 kg / 4.77 pounds 2161.4 g / 21.2 N	OK
60 °C	-4.4%	2.11 kg / 4.66 pounds 2112.8 g / 20.7 N
80 °C	-6.6%	2.06 kg / 4.55 pounds 2064.1 g / 20.2 N
100 °C	-28.8%	1.57 kg / 3.47 pounds 1573.5 g / 15.4 N

Standard neodymium magnets change their properties power past the thermal threshold. Protect against heat – high temperature can irreversibly demagnetize this magnet. With increasing heat, the magnet's force temporarily lowers. Do not use this product close to ovens exceeding its operating temperature limit. Too high temperature will cause irreversible degradation of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures than long magnets. Red status in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - forces in the system
MP 12x8/4x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.09 kg / 6.82 pounds 4 010 Gs	0.46 kg / 1.02 pounds 464 g / 4.6 N	N/A
1 mm	2.77 kg / 6.12 pounds 4 589 Gs	0.42 kg / 0.92 pounds 416 g / 4.1 N	2.50 kg / 5.50 pounds ~0 Gs
2 mm	2.41 kg / 5.31 pounds 4 276 Gs	0.36 kg / 0.80 pounds 361 g / 3.5 N	2.17 kg / 4.78 pounds ~0 Gs
3 mm	2.03 kg / 4.48 pounds 3 930 Gs	0.31 kg / 0.67 pounds 305 g / 3.0 N	1.83 kg / 4.04 pounds ~0 Gs
5 mm	1.36 kg / 3.00 pounds 3 216 Gs	0.20 kg / 0.45 pounds 204 g / 2.0 N	1.23 kg / 2.70 pounds ~0 Gs
10 mm	0.41 kg / 0.91 pounds 1 770 Gs	0.06 kg / 0.14 pounds 62 g / 0.6 N	0.37 kg / 0.82 pounds ~0 Gs
20 mm	0.04 kg / 0.09 pounds 554 Gs	0.01 kg / 0.01 pounds 6 g / 0.1 N	0.04 kg / 0.08 pounds ~0 Gs
50 mm	0.00 kg / 0.00 pounds 58 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 35 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 23 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 16 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 11 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 8 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums attract each other from a wider radius than a magnet and sheet setup. The setup of two magnets generates a stronger field and a larger range of action. Want to build a strong closure? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the collision energy is massive. The levitation is marginally weaker than the attraction, but still significant.
*Field value for N-N configuration reaches ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Attention: Estimates refer to friction force of a pair of same neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - precautionary measures
MP 12x8/4x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.0 cm
Hearing aid	10 Gs (1.0 mT)	4.0 cm
Mechanical watch	20 Gs (2.0 mT)	3.0 cm
Mobile device	40 Gs (4.0 mT)	2.5 cm
Car key	50 Gs (5.0 mT)	2.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field poses a serious hazard to IT equipment and medical implants. These NdFeB products produce a flux that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation passes through tissues and housings. Special caution must be taken by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - warning
MP 12x8/4x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	31.79 km/h (8.83 m/s)	0.09 J
30 mm	54.63 km/h (15.17 m/s)	0.26 J
50 mm	70.52 km/h (19.59 m/s)	0.43 J
100 mm	99.73 km/h (27.70 m/s)	0.87 J

NdFeB products are delicate – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely becomes dangerous. Impact energy can cause material chips or injury to skin. Always hold the magnet during mounting so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear safety glasses when working with large magnets.

Table 9: Coating parameters (durability)
MP 12x8/4x3 / 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 following table defines the conditions under which this product can be safely used. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (Flux)
MP 12x8/4x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	2 466 Mx	24.7 µWb
P_c Coefficient	0.32	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter when building generators as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MP 12x8/4x3 / N38

Environment	Effective steel pull	Effect
Air (land)	2.21 kg	Standard
Water (riverbed)	2.53 kg (+0.32 kg buoyancy gain)	+14.5%

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

Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Shear force

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

2. Efficiency vs thickness

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

3. Thermal stability

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.32

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: 030395-2026

Magnet Unit Converter

Pulling force

Force in kg

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Magnetic Induction

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MP 5x2.7/1.2x5 Z / N38 - ring magnet

0.836 ZŁ brutto / pcs

It is ideally suited for places where solid attachment of the magnet to the substrate is required without the risk of detachment. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. This product with a force of 2.21 kg works great as a door latch, speaker holder, or spacer element in devices.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain great sensitivity. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. 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.

The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Always check that the screw head is not larger than the outer diameter of the magnet (12 mm), so it doesn't protrude beyond the outline.

It is a magnetic ring with a diameter of 12 mm and thickness 3 mm. The pulling force of this model is an impressive 2.21 kg, which translates to 21.72 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 8/4 mm.

The poles are located on the planes with holes, not on the sides of the ring. 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.

Advantages as well as disadvantages of neodymium magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:

They retain full power for nearly ten years – the drop is just ~1% (according to analyses),
Magnets very well resist against loss of magnetization caused by ambient magnetic noise,
Thanks to the shiny finish, the coating of Ni-Cu-Ni, gold-plated, or silver gives an modern appearance,
Magnetic induction on the working part of the magnet is exceptional,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to flexibility in shaping and the ability to customize to complex applications,
Huge importance in modern technologies – they are used in data components, motor assemblies, advanced medical instruments, and industrial machines.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Limitations

Cons of neodymium magnets and proposals for their use:

Brittleness 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
Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Limited possibility of producing threads in the magnet and complex shapes - recommended is cover - mounting mechanism.
Possible danger related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these products can complicate diagnosis medical when they are in the body.
Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Information about lifting capacity was defined for the most favorable conditions, including:

with the application of a sheet made of special test steel, ensuring maximum field concentration
with a thickness minimum 10 mm
characterized by even structure
with zero gap (without impurities)
during pulling in a direction perpendicular to the mounting surface
at conditions approx. 20°C

Lifting capacity in practice – influencing factors

In real-world applications, the actual lifting capacity depends on a number of factors, presented from crucial:

Gap (betwixt the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Material type – ideal substrate is pure iron steel. Stainless steels may attract less.
Base smoothness – the more even the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was determined using a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate lowers the holding force.

Safe handling of neodymium magnets

Physical harm

Risk of injury: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Skin irritation risks

Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation appears, immediately stop handling magnets and wear gloves.

Heat sensitivity

Standard neodymium magnets (grade N) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Keep away from electronics

GPS units and mobile phones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Warning for heart patients

Warning for patients: Powerful magnets affect electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

Magnetic media

Powerful magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Product not for children

Adult use only. Tiny parts pose a choking risk, causing serious injuries. Store away from children and animals.

Machining danger

Combustion risk: Neodymium dust is highly flammable. Do not process magnets without safety gear as this risks ignition.

Risk of cracking

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Powerful field

Be careful. Rare earth magnets attract from a distance and snap with massive power, often quicker than you can move away.

Safety First! Looking for details? Read our article: Why are neodymium magnets dangerous?

MP 12x8/4x3 / N38 - ring magnet

Technical details - MP 12x8/4x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the magnet - technical parameters

Table 1: Static pull force (force vs distance) - power drop MP 12x8/4x3 / N38

Table 2: Shear hold (wall) MP 12x8/4x3 / N38

Table 3: Vertical assembly (sliding) - vertical pull MP 12x8/4x3 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MP 12x8/4x3 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MP 12x8/4x3 / N38

Table 6: Two magnets (repulsion) - forces in the system MP 12x8/4x3 / N38

Table 7: Protective zones (implants) - precautionary measures MP 12x8/4x3 / N38

Table 8: Collisions (kinetic energy) - warning MP 12x8/4x3 / N38

Table 9: Coating parameters (durability) MP 12x8/4x3 / N38

Table 10: Construction data (Flux) MP 12x8/4x3 / N38

Table 11: Hydrostatics and buoyancy MP 12x8/4x3 / N38

1. Shear force

2. Efficiency vs thickness

3. Thermal stability

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

Material specification

Environmental data

Pulling force

Magnetic Induction

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Advantages as well as disadvantages of neodymium magnets.

Pros

Limitations

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Lifting capacity in practice – influencing factors

Safe handling of neodymium magnets

Physical harm

Skin irritation risks

Heat sensitivity

Keep away from electronics

Warning for heart patients

Magnetic media

Product not for children

Machining danger

Risk of cracking

Powerful field

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - power drop
MP 12x8/4x3 / N38

Table 2: Shear hold (wall)
MP 12x8/4x3 / N38

Table 3: Vertical assembly (sliding) - vertical pull
MP 12x8/4x3 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MP 12x8/4x3 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MP 12x8/4x3 / N38

Table 6: Two magnets (repulsion) - forces in the system
MP 12x8/4x3 / N38

Table 7: Protective zones (implants) - precautionary measures
MP 12x8/4x3 / N38

Table 8: Collisions (kinetic energy) - warning
MP 12x8/4x3 / N38

Table 9: Coating parameters (durability)
MP 12x8/4x3 / N38

Table 10: Construction data (Flux)
MP 12x8/4x3 / N38

Table 11: Hydrostatics and buoyancy
MP 12x8/4x3 / N38