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MP 25x8x20 / 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 030450

GTIN/EAN: 5906301812340

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

66.09 g

Magnetization Direction

↑ axial

Load capacity

19.02 kg / 186.54 N

Magnetic Induction

525.50 mT / 5255 Gs

Coating

[NiCuNi] Nickel

see properties »

41.71 ZŁ with VAT / pcs + price for transport

33.91 ZŁ net + 23% VAT / pcs

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Technical specification - MP 25x8x20 / N38 - ring magnet

Specification / characteristics - MP 25x8x20 / N38 - ring magnet

properties

properties	values
Cat. no.	030450
GTIN/EAN	5906301812340
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	25 mm [±0,1 mm]
internal diameter Ø	8 mm [±0,1 mm]
Height	20 mm [±0,1 mm]
Weight	66.09 g
Magnetization Direction	↑ axial
Load capacity ~ ?	19.02 kg / 186.54 N
Magnetic Induction ~ ?	525.50 mT / 5255 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x20 / 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 information are the outcome of a physical calculation. Results were calculated on algorithms for the class Nd₂Fe₁₄B. Actual parameters might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs gap) - interaction chart
MP 25x8x20 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N	critical level
1 mm	5310 Gs 531.0 mT	16.07 kg / 35.42 pounds 16067.7 g / 157.6 N	critical level
2 mm	4846 Gs 484.6 mT	13.38 kg / 29.50 pounds 13380.1 g / 131.3 N	critical level
3 mm	4397 Gs 439.7 mT	11.02 kg / 24.29 pounds 11019.3 g / 108.1 N	critical level
5 mm	3576 Gs 357.6 mT	7.29 kg / 16.07 pounds 7287.1 g / 71.5 N	strong
10 mm	2073 Gs 207.3 mT	2.45 kg / 5.40 pounds 2448.1 g / 24.0 N	strong
15 mm	1231 Gs 123.1 mT	0.86 kg / 1.90 pounds 863.8 g / 8.5 N	safe
20 mm	773 Gs 77.3 mT	0.34 kg / 0.75 pounds 340.1 g / 3.3 N	safe
30 mm	356 Gs 35.6 mT	0.07 kg / 0.16 pounds 72.1 g / 0.7 N	safe
50 mm	115 Gs 11.5 mT	0.01 kg / 0.02 pounds 7.5 g / 0.1 N	safe

Grip strength weakens sharply with every subsequent millimeter of gap. Keep in mind that even a microscopic distance (e.g., dirt, varnish, rust) noticeably reduces the pull force. Magnets hold strongest at the point of direct contact; air break weakens the force. Notice how rapidly the parameters drop, when the magnet does not touch tightly to the metal substrate. When calculating the assembly, discard additional spacers.

Table 2: Slippage force (wall)
MP 25x8x20 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	3.80 kg / 8.39 pounds 3804.0 g / 37.3 N
1 mm	Stal (~0.2)	3.21 kg / 7.09 pounds 3214.0 g / 31.5 N
2 mm	Stal (~0.2)	2.68 kg / 5.90 pounds 2676.0 g / 26.3 N
3 mm	Stal (~0.2)	2.20 kg / 4.86 pounds 2204.0 g / 21.6 N
5 mm	Stal (~0.2)	1.46 kg / 3.21 pounds 1458.0 g / 14.3 N
10 mm	Stal (~0.2)	0.49 kg / 1.08 pounds 490.0 g / 4.8 N
15 mm	Stal (~0.2)	0.17 kg / 0.38 pounds 172.0 g / 1.7 N
20 mm	Stal (~0.2)	0.07 kg / 0.15 pounds 68.0 g / 0.7 N
30 mm	Stal (~0.2)	0.01 kg / 0.03 pounds 14.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N

The following data shows the estimated holding capacity required to initiate the shifting of the magnet downwards against a upright metal surface (considering standard friction coefficient). The holding force is relative to the distance between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 25x8x20 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.71 kg / 12.58 pounds 5706.0 g / 56.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.80 kg / 8.39 pounds 3804.0 g / 37.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.90 kg / 4.19 pounds 1902.0 g / 18.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	9.51 kg / 20.97 pounds 9510.0 g / 93.3 N

When hanging a element on a upright surface (e.g., a board), it will maintain only approx. 1/5 of its nominal power. Gravity and a low friction coefficient cause that holders move down easier than they pop off the substrate. Planning a wall mount? Remember that the shear force is noticeably lower than the maximum static pull force. On a smooth steel, the holder will slip down under a much lighter load. Using a rubber layer can drastically improve the result.

Table 4: Material efficiency (saturation) - power losses
MP 25x8x20 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.95 kg / 2.10 pounds 951.0 g / 9.3 N
1 mm	13%	2.38 kg / 5.24 pounds 2377.5 g / 23.3 N
2 mm	25%	4.76 kg / 10.48 pounds 4755.0 g / 46.6 N
3 mm	38%	7.13 kg / 15.72 pounds 7132.5 g / 70.0 N
5 mm	63%	11.89 kg / 26.21 pounds 11887.5 g / 116.6 N
10 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N
11 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N
12 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N

A thin sheet is unable to conduct the entire magnetic field, which wastes potential of the holder. Should you install a neodymium to a weak sheet, the magnetism will penetrate right through and the pull force will drop sharply. To utilize full efficiency of this magnet's potential, you require a sufficiently solid piece of metal. The saturation phenomenon means that on delicate walls (e.g., appliance housings), the magnet holds weaker. We recommend selecting the steel thickness based on the following data.

Table 5: Thermal resistance (material behavior) - power drop
MP 25x8x20 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N	OK
40 °C	-2.2%	18.60 kg / 41.01 pounds 18601.6 g / 182.5 N	OK
60 °C	-4.4%	18.18 kg / 40.09 pounds 18183.1 g / 178.4 N	OK
80 °C	-6.6%	17.76 kg / 39.16 pounds 17764.7 g / 174.3 N
100 °C	-28.8%	13.54 kg / 29.86 pounds 13542.2 g / 132.8 N

Ordinary NdFeB products irreversibly lose parameters above the temperature limit. Avoid high temperatures – heat can permanently damage this magnet. With increasing heat, the neodymium's capacity momentarily decreases. Avoid using this magnet near heat sources exceeding its operating temperature limit. Too high temperature will cause irreversible degradation of magnetic properties.

*Technical advisory: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Flat magnets (pancake types) risk losing magnetic properties at lower temperatures than taller cylinders. The danger warning in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 25x8x20 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	30.91 kg / 68.14 pounds 6 082 Gs	4.64 kg / 10.22 pounds 4636 g / 45.5 N	N/A
1 mm	28.48 kg / 62.79 pounds 11 091 Gs	4.27 kg / 9.42 pounds 4272 g / 41.9 N	25.63 kg / 56.51 pounds ~0 Gs
2 mm	26.11 kg / 57.57 pounds 10 620 Gs	3.92 kg / 8.63 pounds 3917 g / 38.4 N	23.50 kg / 51.81 pounds ~0 Gs
3 mm	23.86 kg / 52.61 pounds 10 153 Gs	3.58 kg / 7.89 pounds 3580 g / 35.1 N	21.48 kg / 47.35 pounds ~0 Gs
5 mm	19.76 kg / 43.56 pounds 9 238 Gs	2.96 kg / 6.53 pounds 2964 g / 29.1 N	17.78 kg / 39.20 pounds ~0 Gs
10 mm	11.84 kg / 26.11 pounds 7 152 Gs	1.78 kg / 3.92 pounds 1776 g / 17.4 N	10.66 kg / 23.50 pounds ~0 Gs
20 mm	3.98 kg / 8.77 pounds 4 145 Gs	0.60 kg / 1.32 pounds 597 g / 5.9 N	3.58 kg / 7.89 pounds ~0 Gs
50 mm	0.24 kg / 0.54 pounds 1 024 Gs	0.04 kg / 0.08 pounds 36 g / 0.4 N	0.22 kg / 0.48 pounds ~0 Gs
60 mm	0.12 kg / 0.26 pounds 712 Gs	0.02 kg / 0.04 pounds 18 g / 0.2 N	0.11 kg / 0.23 pounds ~0 Gs
70 mm	0.06 kg / 0.13 pounds 514 Gs	0.01 kg / 0.02 pounds 9 g / 0.1 N	0.06 kg / 0.12 pounds ~0 Gs
80 mm	0.03 kg / 0.07 pounds 383 Gs	0.01 kg / 0.01 pounds 5 g / 0.1 N	0.03 kg / 0.07 pounds ~0 Gs
90 mm	0.02 kg / 0.04 pounds 293 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
100 mm	0.01 kg / 0.03 pounds 230 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs

Two magnets attract each other from a wider radius than a magnet and steel setup. The setup of magnet-to-magnet produces a massive flux and a further horizon of operation. Want to build a powerful holder? Apply two magnets instead of a neodymium and a steel. Remember that when attracting two neodymiums, the impact force is massive. The repulsion force is slightly lower than the connection force, but still large.
*Flux density between like poles drops to ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Important: Results apply to sliding force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - precautionary measures
MP 25x8x20 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	17.0 cm
Hearing aid	10 Gs (1.0 mT)	13.5 cm
Timepiece	20 Gs (2.0 mT)	10.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	8.0 cm
Remote	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Extremely neodym field is a serious hazard to electronic devices as well as pacemakers. These NdFeB products produce a flux that destroys function of digital equipment. Notice: the unseen radiation penetrates the body and glass. Special caution must be exercised by people with hearing aids and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - warning
MP 25x8x20 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	18.43 km/h (5.12 m/s)	0.87 J
30 mm	29.70 km/h (8.25 m/s)	2.25 J
50 mm	38.27 km/h (10.63 m/s)	3.73 J
100 mm	54.10 km/h (15.03 m/s)	7.46 J

Neodymium magnets are delicate – a violent impact against metal causes immediate chipping. Watch the impact speed – a magnet released freely speeds with massive force. Kinetic force can trigger coating fragments or injury to fingers. Always hold the magnet during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Use safety goggles when handling with large magnets.

Table 9: Coating parameters (durability)
MP 25x8x20 / N38

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

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

Table 10: Electrical data (Flux)
MP 25x8x20 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	10 108 Mx	101.1 µWb
P_c Coefficient	1.25	High (Stable)

Flux value passing through the magnet pole. Key data in coil applications and motors. P_c value defines the working geometry.

Table 11: Physics of underwater searching
MP 25x8x20 / N38

Environment	Effective steel pull	Effect
Air (land)	19.02 kg	Standard
Water (riverbed)	21.78 kg (+2.76 kg buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Water displaces steel, making heavy objects slightly lighter. However, remember the water resistance when pulling the rope quickly.

1. Shear force

*Note: On a vertical surface, the magnet retains merely a fraction of its perpendicular strength.

2. Steel saturation

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

3. Power loss vs temp

*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) = 1.25

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.

Engineering data and GPSR

Chemical composition

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: 030450-2026

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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. 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 25x8x20 / 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 is not sufficient for rain. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 8 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 (25 mm), so it doesn't protrude beyond the outline.

The presented product is a ring magnet with dimensions Ø25 mm (outer diameter) and height 20 mm. The pulling force of this model is an impressive 19.02 kg, which translates to 186.54 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 8 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Benefits

Besides their immense pulling force, neodymium magnets offer the following advantages:

They retain full power for around 10 years – the loss is just ~1% (in theory),
They maintain their magnetic properties even under close interference source,
In other words, due to the glossy finish of gold, the element gains a professional look,
Neodymium magnets generate maximum magnetic induction on a small surface, which increases force concentration,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
Possibility of exact creating and adjusting to precise requirements,
Versatile presence in electronics industry – they find application in magnetic memories, electromotive mechanisms, advanced medical instruments, as well as technologically advanced constructions.
Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Limitations

Drawbacks and weaknesses of neodymium magnets and ways of using them

At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
Limited ability of making nuts in the magnet and complex shapes - recommended is a housing - magnetic holder.
Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these products are able to disrupt the diagnostic process medical when they are in the body.
Due to neodymium price, their price exceeds standard values,

Pull force analysis

Maximum lifting capacity of the magnet – what contributes to it?

Magnet power was determined for optimal configuration, assuming:

with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
with a thickness of at least 10 mm
with an ideally smooth contact surface
without the slightest clearance between the magnet and steel
under axial force direction (90-degree angle)
in stable room temperature

Practical lifting capacity: influencing factors

Bear in mind that the magnet holding will differ depending on the following factors, starting with the most relevant:

Distance – the presence of any layer (paint, dirt, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
Steel thickness – insufficiently thick steel does not close the flux, causing part of the power to be wasted to the other side.
Steel type – low-carbon steel attracts best. Higher carbon content reduce magnetic properties and lifting capacity.
Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity was determined by applying a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate lowers the holding force.

Warnings

Safe operation

Handle magnets consciously. Their powerful strength can surprise even professionals. Stay alert and respect their force.

Flammability

Mechanical processing of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Phone sensors

GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Fragile material

NdFeB magnets are sintered ceramics, meaning they are very brittle. Clashing of two magnets leads to them breaking into shards.

Crushing risk

Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Power loss in heat

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Allergy Warning

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

Choking Hazard

Only for adults. Tiny parts can be swallowed, causing serious injuries. Store out of reach of children and animals.

Life threat

Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Protect data

Device Safety: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

Caution! Details about risks in the article: Magnet Safety Guide.

MP 25x8x20 / N38 - ring magnet

Technical specification - MP 25x8x20 / 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 force (force vs gap) - interaction chart MP 25x8x20 / N38

Table 2: Slippage force (wall) MP 25x8x20 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MP 25x8x20 / N38

Table 4: Material efficiency (saturation) - power losses MP 25x8x20 / N38

Table 5: Thermal resistance (material behavior) - power drop MP 25x8x20 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system MP 25x8x20 / N38

Table 7: Hazards (implants) - precautionary measures MP 25x8x20 / N38

Table 8: Collisions (kinetic energy) - warning MP 25x8x20 / N38

Table 9: Coating parameters (durability) MP 25x8x20 / N38

Table 10: Electrical data (Flux) MP 25x8x20 / N38

Table 11: Physics of underwater searching MP 25x8x20 / N38

1. Shear force

2. Steel saturation

3. Power loss vs temp

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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Magnetic Field

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Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

Limitations

Pull force analysis

Maximum lifting capacity of the magnet – what contributes to it?

Practical lifting capacity: influencing factors

Warnings

Safe operation

Flammability

Phone sensors

Fragile material

Crushing risk

Power loss in heat

Allergy Warning

Choking Hazard

Life threat

Protect data

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - interaction chart
MP 25x8x20 / N38

Table 2: Slippage force (wall)
MP 25x8x20 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 25x8x20 / N38

Table 4: Material efficiency (saturation) - power losses
MP 25x8x20 / N38

Table 5: Thermal resistance (material behavior) - power drop
MP 25x8x20 / N38

Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MP 25x8x20 / N38

Table 7: Hazards (implants) - precautionary measures
MP 25x8x20 / N38

Table 8: Collisions (kinetic energy) - warning
MP 25x8x20 / N38

Table 9: Coating parameters (durability)
MP 25x8x20 / N38

Table 10: Electrical data (Flux)
MP 25x8x20 / N38

Table 11: Physics of underwater searching
MP 25x8x20 / N38

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.