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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 specifications »

1.427 ZŁ with VAT / pcs + price for transport

1.160 ZŁ net + 23% VAT / pcs

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Pick up the phone and ask +48 888 99 98 98 otherwise contact us by means of form our website.
Specifications as well as appearance of a neodymium magnet can be reviewed on our force calculator.

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Product card - 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 simulation of the assembly - report

The following data represent the outcome of a physical analysis. Results were calculated on models for the class Nd₂Fe₁₄B. Real-world performance might slightly deviate from the simulation results. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs gap) - characteristics
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	weak grip
2 mm	1786 Gs 178.6 mT	1.20 kg / 2.65 pounds 1200.5 g / 11.8 N	weak grip
3 mm	1437 Gs 143.7 mT	0.78 kg / 1.71 pounds 777.8 g / 7.6 N	weak grip
5 mm	885 Gs 88.5 mT	0.29 kg / 0.65 pounds 294.7 g / 2.9 N	weak grip
10 mm	277 Gs 27.7 mT	0.03 kg / 0.06 pounds 28.9 g / 0.3 N	weak grip
15 mm	110 Gs 11.0 mT	0.00 kg / 0.01 pounds 4.6 g / 0.0 N	weak grip
20 mm	53 Gs 5.3 mT	0.00 kg / 0.00 pounds 1.1 g / 0.0 N	weak grip
30 mm	18 Gs 1.8 mT	0.00 kg / 0.00 pounds 0.1 g / 0.0 N	weak grip
50 mm	4 Gs 0.4 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	weak grip

Pulling power weakens significantly per each millimeter of distance. Keep in mind that even a very thin break (e.g., contamination, varnish, dust) noticeably weakens the grip. Magnets work optimally in perfect adhesion; gap drastically cuts the force. See how quickly the load capacity drop, when the product does not adhere directly to the metal substrate. When calculating the arrangement, discard additional spacers.

Table 2: Vertical 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 table below presents the theoretical holding capacity needed to cause the downward movement of the magnet down along a vertical steel wall (considering typical friction coefficient). The holding force depends on the distance between the magnet and the metal.

Table 3: Wall mounting (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 element on a upright plane (e.g., a fridge), it you can count on just approx. 1/5 of its nominal power. Gravity as well as a low friction coefficient cause that holders slide down easier than they pull off. Designing a vertical fastening? Note that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the holder will slip down under a much lighter load. Application of an anti-slip layer can drastically increase the grip.

Table 4: Material efficiency (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 thin metal plate is not enough to conduct the entire magnetic field, which weakens actual performance of the magnet. Should you attach a powerful product to a weak sheet, the flux will pass right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's potential, you need a suitably thick backing of metal. The saturation effect means that on delicate walls (e.g., car bodies), the magnet works worse. We advise picking the steel cross-section from these parameters.

Table 5: Thermal stability (material behavior) - power drop
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 parameters after exceeding the maximum temperature. Avoid high temperatures – high temperature can irreversibly damage this product. With every degree above norm, the magnet's force briefly decreases. Avoid using this product close to ovens higher than its working range. Ignoring the limit will result in permanent loss of magnetic properties.

*Important note: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Low-profile magnets (low Pc) may lose charge permanently sooner compared to rod magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field collision
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 interact from a significantly greater distance than a magnet and sheet setup. The connection of magnet-to-magnet produces a massive flux and a larger range of operation. Want to build a strong closure? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when attracting two neodymiums, the collision energy is extreme. The repulsion force is a bit weaker than the attraction, but still significant.
*Field value between like poles drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
Important: Calculations demonstrate friction force of a pair of same magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Hazards (implants) - warnings
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
Timepiece	20 Gs (2.0 mT)	3.0 cm
Mobile device	40 Gs (4.0 mT)	2.5 cm
Remote	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

Powerful magnet radiation is a large risk to electronic devices as well as medical implants. These magnets produce a field that disrupts operation of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and housings. Exceptional care must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, car keys, speakers, and displays. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Collisions (cracking risk) - 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

Magnetic elements are delicate – a violent impact against metal risks their cracking. Control the attraction moment – a magnet released freely turns into a projectile. Kinetic force can trigger coating fragments or painful pinches to fingers. Hold the magnet firmly 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 magnet. Use safety goggles when working with powerful specimens.

Table 9: Surface protection spec
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 emitted by the magnet pole. Essential parameter in coil applications and motors. P_c value defines the working geometry.

Table 11: Physics of underwater searching
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.

In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.

1. Sliding resistance

*Caution: On a vertical wall, the magnet holds just approx. 20-30% of its nominal pull.

2. Plate thickness effect

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

3. Heat tolerance

*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

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

Technical specification and ecology

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%

Sustainability

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: 030395-2025

Measurement Calculator

Magnet pull force

Force in kg

Pounds (lbs)

Field Strength

Gauss (Gs)

Tesla (T)

Input a figure in just one slot to receive results for the other fields immediately.

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The ring magnet with a hole 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 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. 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. Damage to the protective layer during assembly is the most common cause of rusting. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 8/4 mm fits this model. 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.

The presented product is a ring magnet with dimensions Ø12 mm (outer diameter) and height 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.

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.

Advantages as well as disadvantages of neodymium magnets.

Advantages

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

Their magnetic field is maintained, and after around 10 years it drops only by ~1% (theoretically),
They possess excellent resistance to magnetism drop when exposed to external fields,
By using a shiny layer of nickel, the element presents an elegant look,
Magnets have impressive magnetic induction on the active area,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures reaching 230°C and above...
Possibility of precise machining as well as modifying to defined requirements,
Huge importance in high-tech industry – they serve a role in mass storage devices, electric motors, medical equipment, as well as industrial machines.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in miniature devices

Limitations

Disadvantages of neodymium magnets:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
Limited possibility of creating threads in the magnet and complicated shapes - recommended is cover - magnetic holder.
Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
Due to neodymium price, their price is higher than average,

Lifting parameters

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

Breakaway force was determined for optimal configuration, including:

on a block made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of at least 10 mm to ensure full flux closure
with a surface free of scratches
with zero gap (without coatings)
under axial application of breakaway force (90-degree angle)
in stable room temperature

Determinants of practical lifting force of a magnet

In practice, the actual holding force results from several key aspects, ranked from crucial:

Gap (betwixt the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, rust or debris).
Force direction – 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.
Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
Plate material – mild steel gives the best results. Higher carbon content reduce magnetic permeability and holding force.
Plate texture – smooth surfaces ensure maximum contact, which increases force. Uneven metal reduce efficiency.
Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, in contrast under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safe handling of neodymium magnets

Thermal limits

Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Respect the power

Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Risk of cracking

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

No play value

NdFeB magnets are not toys. Swallowing several magnets can lead to them attracting across intestines, which poses a critical condition and requires immediate surgery.

Magnetic interference

A powerful magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid damaging the sensors.

Implant safety

Patients with a ICD must maintain an large gap from magnets. The magnetism can stop the functioning of the life-saving device.

Avoid contact if allergic

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness appears, immediately stop handling magnets and wear gloves.

Bodily injuries

Watch your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Be careful!

Flammability

Fire hazard: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Keep away from computers

Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

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

MP 12x8/4x3 / N38 - ring magnet

Product card - MP 12x8/4x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the assembly - report

Table 1: Static force (pull vs gap) - characteristics MP 12x8/4x3 / N38

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

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

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

Table 5: Thermal stability (material behavior) - power drop MP 12x8/4x3 / N38

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

Table 7: Hazards (implants) - warnings MP 12x8/4x3 / N38

Table 8: Collisions (cracking risk) - warning MP 12x8/4x3 / N38

Table 9: Surface protection spec MP 12x8/4x3 / N38

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

Table 11: Physics of underwater searching MP 12x8/4x3 / N38

1. Sliding resistance

2. Plate thickness effect

3. Heat tolerance

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

Elemental analysis

Sustainability

Magnet pull force

Field Strength

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Advantages as well as disadvantages of neodymium magnets.

Advantages

Limitations

Lifting parameters

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

Determinants of practical lifting force of a magnet

Safe handling of neodymium magnets

Thermal limits

Respect the power

Risk of cracking

No play value

Magnetic interference

Implant safety

Avoid contact if allergic

Bodily injuries

Flammability

Keep away from computers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs gap) - characteristics
MP 12x8/4x3 / N38

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

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

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

Table 5: Thermal stability (material behavior) - power drop
MP 12x8/4x3 / N38

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

Table 7: Hazards (implants) - warnings
MP 12x8/4x3 / N38

Table 8: Collisions (cracking risk) - warning
MP 12x8/4x3 / N38

Table 9: Surface protection spec
MP 12x8/4x3 / N38

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

Table 11: Physics of underwater searching
MP 12x8/4x3 / N38