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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

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1.427 ZŁ with VAT / pcs + price for transport

1.160 ZŁ net + 23% VAT / pcs

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Technical data - 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

Engineering analysis of the magnet - technical parameters

Presented data constitute the outcome of a engineering calculation. Values are based on models for the material Nd₂Fe₁₄B. Actual conditions might slightly differ. Use these data as a preliminary roadmap when designing systems.

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	medium risk
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 decreases significantly with every mm of spacing. Keep in mind that even the smallest gap (e.g., contamination, paint, veneer) significantly diminishes the holding power. Magnetic products operate most effectively during direct contact; distance weakens the power. Notice how rapidly the pull force fall, when the product does not adhere directly to the steel surface. When calculating the assembly, eliminate redundant distances.

Table 2: Sliding force (vertical surface)
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 indicates the estimated shear load needed to cause the sliding of the magnet downwards along a upright metal surface (assuming standard friction). This value is relative to the distance between the magnet and the metal.

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 mounting a magnet on a vertical plane (e.g., a board), it will only hold only approx. 1/5 of its nominal power. Gravity and a weak degree of grip cause that magnets move down faster than they pull off. Designing a vertical fastening? Consider that the sliding force is much weaker than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a much lighter load. Using a rubber coating can effectively improve the result.

Table 4: Steel thickness (substrate influence) - 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 too thin steel is incapable of absorb the full magnetic flux, which wastes potential of the holder. 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 the maximum of this magnet's potential, you require a sufficiently solid piece of metal. The saturation effect means that on sheet metal structures (e.g., car bodies), the magnet works worse. We suggest choosing the steel dimension according to the table below.

Table 5: Working in heat (stability) - 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 lose parameters above the temperature limit. Avoid high temperatures – excessive heat can permanently damage this product. With every degree above norm, the neodymium's capacity momentarily lowers. Do not use this magnet close to ovens higher than its safe range. Too high temperature will lead to destruction of magnetism.

*Technical advisory: Temperature resistance is determined by both grade, as well as the dimension ratios. Flat magnets (low Pc) are more susceptible to demagnetization at lower temperatures compared to rod magnets. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - field range
MP 12x8/4x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (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 magnets interact from a significantly greater distance than a magnet and steel combination. The setup of magnet-to-magnet produces a massive flux and a wider radius of operation. Designing a strong closure? Apply two magnets instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is extreme. The repulsion force is slightly lower than the attraction, but still large.
*The magnetic induction between like poles is approximately ~0 Gs at the midpoint of the gap (resulting from vector opposition).
Attention: Figures demonstrate friction force of a pair of identical magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (electronics) - 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

A strong magnetic field poses a real danger to electronics as well as pacemakers. These NdFeB products generate a flux that destroys function of sensitive medical devices. Notice: the invisible magnetic field acts through matter and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, car keys, membranes, and displays. Do not bring the product near payment cards, HDD media, or precise measuring instruments.

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

Neodymium magnets are prone to chipping – a collision with steel causes immediate chipping. Watch the impact speed – a neodymium left loose speeds with massive force. Striking energy can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during installation so it doesn't hit violently against the metal. A collision at high speed means shattering of the neodymium. Use safety goggles when playing with large magnets.

Table 9: Corrosion resistance
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. Moisture resistance is crucial for installations in bathrooms or outdoors.

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 magnet pole. Essential parameter for generator designers and motors. P_c value defines the working geometry.

Table 11: Underwater work (magnet fishing)
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%

Corrosion warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

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

2. Plate thickness effect

*Thin metal sheet (e.g. 0.5mm PC case) severely weakens 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) = 0.32

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.

Technical and environmental data

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: 030395-2026

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The ring-shaped magnet MP 12x8/4x3 / N38 is created for mechanical fastening, 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 is a crucial issue when working with model MP 12x8/4x3 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. The flat screw head should evenly press the magnet. 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 is not sufficient for rain. 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. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

The inner hole diameter determines the maximum size of the mounting element. 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. 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.

This model is characterized by dimensions Ø12x3 mm and a weight of 2.26 g. 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.

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). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Advantages and disadvantages of neodymium magnets.

Benefits

In addition to their pulling strength, neodymium magnets provide the following advantages:

They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
They retain their magnetic properties even under strong external field,
Thanks to the glossy finish, the layer of nickel, gold, or silver-plated gives an elegant appearance,
Neodymium magnets achieve maximum magnetic induction on a their surface, which allows for strong attraction,
Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures approaching 230°C and above...
In view of the possibility of accurate molding and customization to custom solutions, neodymium magnets can be modeled in a broad palette of shapes and sizes, which increases their versatility,
Versatile presence in advanced technology sectors – they find application in computer drives, electromotive mechanisms, advanced medical instruments, and complex engineering applications.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:

Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets suffer a drop in strength. 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
They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Limited possibility of producing threads in the magnet and complicated shapes - preferred is a housing - mounting mechanism.
Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Additionally, small elements of these devices can disrupt the diagnostic process medical when they are in the body.
Due to expensive raw materials, their price is higher than average,

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

The load parameter shown refers to the peak performance, obtained under optimal environment, specifically:

on a plate made of mild steel, effectively closing the magnetic field
whose transverse dimension reaches at least 10 mm
characterized by smoothness
under conditions of no distance (surface-to-surface)
under vertical force vector (90-degree angle)
at temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

It is worth knowing that the magnet holding will differ subject to elements below, starting with the most relevant:

Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or unevenness) 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 sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
Steel type – low-carbon steel attracts best. Higher carbon content decrease magnetic properties and holding force.
Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
Thermal factor – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate lowers the holding force.

H&S for magnets

Metal Allergy

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness occurs, cease handling magnets and wear gloves.

Fire warning

Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.

Shattering risk

Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.

Handling rules

Before starting, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.

Bone fractures

Risk of injury: The pulling power is so immense that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.

Safe distance

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

No play value

Adult use only. Small elements pose a choking risk, causing intestinal necrosis. Store out of reach of children and animals.

Medical implants

People with a ICD must maintain an large gap from magnets. The magnetic field can disrupt the operation of the life-saving device.

Heat warning

Do not overheat. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Precision electronics

Remember: neodymium magnets generate a field that confuses sensitive sensors. Keep a separation from your mobile, tablet, and GPS.

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

MP 12x8/4x3 / N38 - ring magnet

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

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the magnet - technical parameters

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

Table 2: Sliding force (vertical surface) MP 12x8/4x3 / N38

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

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

Table 5: Working in heat (stability) - thermal limit MP 12x8/4x3 / N38

Table 6: Two magnets (repulsion) - field range MP 12x8/4x3 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MP 12x8/4x3 / N38

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

Table 9: Corrosion resistance MP 12x8/4x3 / N38

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

Table 11: Underwater work (magnet fishing) MP 12x8/4x3 / N38

1. Wall mount (shear)

2. Plate thickness effect

3. Power loss vs temp

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

Elemental analysis

Environmental data

Force (pull)

Field Strength

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Advantages and disadvantages of neodymium magnets.

Benefits

Cons

Pull force analysis

Maximum lifting force for a neodymium magnet – what affects it?

Practical lifting capacity: influencing factors

H&S for magnets

Metal Allergy

Fire warning

Shattering risk

Handling rules

Bone fractures

Safe distance

No play value

Medical implants

Heat warning

Precision electronics

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: Sliding force (vertical surface)
MP 12x8/4x3 / N38

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

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

Table 5: Working in heat (stability) - thermal limit
MP 12x8/4x3 / N38

Table 6: Two magnets (repulsion) - field range
MP 12x8/4x3 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 12x8/4x3 / N38

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

Table 9: Corrosion resistance
MP 12x8/4x3 / N38

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

Table 11: Underwater work (magnet fishing)
MP 12x8/4x3 / N38