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MP 25x8x5 / 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 030196

GTIN/EAN: 5906301812135

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

16.52 g

Magnetization Direction

↑ axial

Load capacity

7.16 kg / 70.21 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

view specifications »

5.90 ZŁ with VAT / pcs + price for transport

4.80 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Technical - MP 25x8x5 / N38 - ring magnet

Specification / characteristics - MP 25x8x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030196
GTIN/EAN	5906301812135
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	5 mm [±0,1 mm]
Weight	16.52 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.16 kg / 70.21 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x5 / 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 modeling of the product - data

Presented values constitute the direct effect of a engineering calculation. Results rely on models for the material Nd₂Fe₁₄B. Actual performance might slightly differ from theoretical values. Use these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs gap) - characteristics
MP 25x8x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	7.16 kg / 15.79 lbs 7160.0 g / 70.2 N	warning
1 mm	5310 Gs 531.0 mT	6.05 kg / 13.33 lbs 6048.6 g / 59.3 N	warning
2 mm	4846 Gs 484.6 mT	5.04 kg / 11.10 lbs 5036.9 g / 49.4 N	warning
3 mm	4397 Gs 439.7 mT	4.15 kg / 9.15 lbs 4148.2 g / 40.7 N	warning
5 mm	3576 Gs 357.6 mT	2.74 kg / 6.05 lbs 2743.2 g / 26.9 N	warning
10 mm	2073 Gs 207.3 mT	0.92 kg / 2.03 lbs 921.6 g / 9.0 N	low risk
15 mm	1231 Gs 123.1 mT	0.33 kg / 0.72 lbs 325.2 g / 3.2 N	low risk
20 mm	773 Gs 77.3 mT	0.13 kg / 0.28 lbs 128.0 g / 1.3 N	low risk
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 lbs 27.2 g / 0.3 N	low risk
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 lbs 2.8 g / 0.0 N	low risk

Magnetic force weakens sharply with every subsequent millimeter of spacing. Keep in mind that every additional insulation layer (e.g., dirt, paint, dust) strongly diminishes the holding power. Magnetic products operate most effectively at the point of direct contact; gap weakens the force. Analyze how rapidly the pull force fall, when the product does not adhere directly to the metal substrate. When planning the mounting, discard additional spacers.

Table 2: Shear capacity (vertical surface)
MP 25x8x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.43 kg / 3.16 lbs 1432.0 g / 14.0 N
1 mm	Stal (~0.2)	1.21 kg / 2.67 lbs 1210.0 g / 11.9 N
2 mm	Stal (~0.2)	1.01 kg / 2.22 lbs 1008.0 g / 9.9 N
3 mm	Stal (~0.2)	0.83 kg / 1.83 lbs 830.0 g / 8.1 N
5 mm	Stal (~0.2)	0.55 kg / 1.21 lbs 548.0 g / 5.4 N
10 mm	Stal (~0.2)	0.18 kg / 0.41 lbs 184.0 g / 1.8 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 lbs 66.0 g / 0.6 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 lbs 26.0 g / 0.3 N
30 mm	Stal (~0.2)	0.01 kg / 0.01 lbs 6.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The following data defines the approximate shear load required to cause the shifting of the magnet vertically on a upright steel wall (assuming standard friction). This parameter depends on the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MP 25x8x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.15 kg / 4.74 lbs 2148.0 g / 21.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.43 kg / 3.16 lbs 1432.0 g / 14.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.72 kg / 1.58 lbs 716.0 g / 7.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.58 kg / 7.89 lbs 3580.0 g / 35.1 N

When placing a holder on a vertical plane (e.g., a car body), it you can count on just approx. 1/5 of its nominal power. Gravity as well as a weak degree of grip cause that magnets slip faster than they pull off. Planning a wall mount? Remember that the shear force is noticeably lower than the maximum static pull force. On a painted metal, the magnet will slide down under a noticeably lighter weight. Application of an anti-slip coating can significantly improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MP 25x8x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.72 kg / 1.58 lbs 716.0 g / 7.0 N
1 mm	25%	1.79 kg / 3.95 lbs 1790.0 g / 17.6 N
2 mm	50%	3.58 kg / 7.89 lbs 3580.0 g / 35.1 N
3 mm	75%	5.37 kg / 11.84 lbs 5370.0 g / 52.7 N
5 mm	100%	7.16 kg / 15.79 lbs 7160.0 g / 70.2 N
10 mm	100%	7.16 kg / 15.79 lbs 7160.0 g / 70.2 N
11 mm	100%	7.16 kg / 15.79 lbs 7160.0 g / 70.2 N
12 mm	100%	7.16 kg / 15.79 lbs 7160.0 g / 70.2 N

A thin metal plate is not enough to take in the entire magnetic field, which weakens actual performance of the holder. Should you install a neodymium to a too thin substrate, the field will pass right through and the holding will be smaller. To utilize full efficiency of this neodymium's potential, you require a sufficiently solid piece of metal. The saturation effect means that on sheet metal structures (e.g., car bodies), the product shows lower pull force. We advise picking the steel thickness according to the table below.

Table 5: Thermal resistance (stability) - power drop
MP 25x8x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.16 kg / 15.79 lbs 7160.0 g / 70.2 N	OK
40 °C	-2.2%	7.00 kg / 15.44 lbs 7002.5 g / 68.7 N	OK
60 °C	-4.4%	6.84 kg / 15.09 lbs 6845.0 g / 67.1 N	OK
80 °C	-6.6%	6.69 kg / 14.74 lbs 6687.4 g / 65.6 N
100 °C	-28.8%	5.10 kg / 11.24 lbs 5097.9 g / 50.0 N

Standard neodymium magnets irreversibly lose power after exceeding the maximum temperature. Watch out for overheating – heat can permanently demagnetize this magnet. With every degree above norm, the neodymium's power temporarily drops. Avoid using this product near heat sources exceeding its working range. Exceeding the critical threshold will result in destruction of magnetic properties.

*Technical advisory: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low Pc) are more susceptible to demagnetization under lower heat stress than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x8x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	82.42 kg / 181.72 lbs 6 082 Gs	12.36 kg / 27.26 lbs 12364 g / 121.3 N	N/A
1 mm	75.95 kg / 167.44 lbs 11 091 Gs	11.39 kg / 25.12 lbs 11392 g / 111.8 N	68.35 kg / 150.69 lbs ~0 Gs
2 mm	69.63 kg / 153.51 lbs 10 620 Gs	10.44 kg / 23.03 lbs 10445 g / 102.5 N	62.67 kg / 138.16 lbs ~0 Gs
3 mm	63.64 kg / 140.29 lbs 10 153 Gs	9.55 kg / 21.04 lbs 9545 g / 93.6 N	57.27 kg / 126.26 lbs ~0 Gs
5 mm	52.69 kg / 116.16 lbs 9 238 Gs	7.90 kg / 17.42 lbs 7903 g / 77.5 N	47.42 kg / 104.54 lbs ~0 Gs
10 mm	31.58 kg / 69.62 lbs 7 152 Gs	4.74 kg / 10.44 lbs 4737 g / 46.5 N	28.42 kg / 62.66 lbs ~0 Gs
20 mm	10.61 kg / 23.39 lbs 4 145 Gs	1.59 kg / 3.51 lbs 1591 g / 15.6 N	9.55 kg / 21.05 lbs ~0 Gs
50 mm	0.65 kg / 1.43 lbs 1 024 Gs	0.10 kg / 0.21 lbs 97 g / 1.0 N	0.58 kg / 1.28 lbs ~0 Gs
60 mm	0.31 kg / 0.69 lbs 712 Gs	0.05 kg / 0.10 lbs 47 g / 0.5 N	0.28 kg / 0.62 lbs ~0 Gs
70 mm	0.16 kg / 0.36 lbs 514 Gs	0.02 kg / 0.05 lbs 24 g / 0.2 N	0.15 kg / 0.32 lbs ~0 Gs
80 mm	0.09 kg / 0.20 lbs 383 Gs	0.01 kg / 0.03 lbs 14 g / 0.1 N	0.08 kg / 0.18 lbs ~0 Gs
90 mm	0.05 kg / 0.12 lbs 293 Gs	0.01 kg / 0.02 lbs 8 g / 0.1 N	0.05 kg / 0.11 lbs ~0 Gs
100 mm	0.03 kg / 0.07 lbs 230 Gs	0.00 kg / 0.01 lbs 5 g / 0.0 N	0.03 kg / 0.06 lbs ~0 Gs

Two strong neodymiums interact from a wider radius than a magnet and sheet combination. The connection of two magnets generates a stronger field and a larger range of performance. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Remember that when attracting two neodymiums, the pinch force is huge. The levitation is a bit weaker than the attraction, but still significant.
*Flux density between like poles reaches ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
Important: Figures refer to friction force of a pair of matching magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 25x8x5 / 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
Mechanical watch	20 Gs (2.0 mT)	10.5 cm
Mobile device	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

Powerful magnet radiation is a large risk to electronic devices as well as medical implants. These neodymiums generate a field that disrupts operation of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and housings. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. Influence will be felt by: mechanical watches, remotes, membranes, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MP 25x8x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.62 km/h (6.28 m/s)	0.33 J
30 mm	36.45 km/h (10.13 m/s)	0.85 J
50 mm	46.96 km/h (13.04 m/s)	1.41 J
100 mm	66.40 km/h (18.44 m/s)	2.81 J

Magnetic elements are very brittle – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Kinetic force can trigger coating fragments or dangerous crushing to skin. Be sure to control the product during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear eye protection when playing with powerful specimens.

Table 9: Surface protection spec
MP 25x8x5 / N38

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

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MP 25x8x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	24 536 Mx	245.4 µWb
P_c Coefficient	1.03	High (Stable)

Total magnetic flux passing through the magnet pole. Essential parameter for generator designers and motors. The P_c coefficient defines the working geometry.

Table 11: Submerged application
MP 25x8x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.16 kg	Standard
Water (riverbed)	8.20 kg (+1.04 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Shear force

*Note: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Plate thickness effect

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

3. Power loss vs temp

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.03

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

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: 030196-2026

Magnet Unit Converter

Pulling force

Newtons (N)

Pounds (lbs)

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Gauss (Gs)

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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. This product with a force of 7.16 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 25x8x5 / 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. It's a good idea to use a flexible washer 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. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

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

It is a magnetic ring with a diameter of 25 mm and thickness 5 mm. The pulling force of this model is an impressive 7.16 kg, which translates to 70.21 N in newtons. The mounting hole diameter is precisely 8 mm.

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

Pros as well as cons of neodymium magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
Neodymium magnets are characterized by remarkably resistant to demagnetization caused by external interference,
By covering with a decorative coating of silver, the element presents an professional look,
Magnetic induction on the top side of the magnet is maximum,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Thanks to modularity in constructing and the ability to modify to complex applications,
Key role in innovative solutions – they serve a role in mass storage devices, electric motors, medical equipment, and modern systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in small systems

Disadvantages

What to avoid - cons of neodymium magnets: tips and applications.

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated forms.
Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical after entering the body.
With budget limitations the cost of neodymium magnets can be a barrier,

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what it depends on?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:

on a base made of mild steel, effectively closing the magnetic flux
possessing a massiveness of at least 10 mm to avoid saturation
with an ideally smooth contact surface
with total lack of distance (without paint)
during pulling in a direction vertical to the mounting surface
at conditions approx. 20°C

What influences lifting capacity in practice

Effective lifting capacity is influenced by specific conditions, such as (from priority):

Gap between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Metal type – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate decreases the lifting capacity.

Safety rules for work with NdFeB magnets

Electronic devices

Do not bring magnets close to a wallet, laptop, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Safe operation

Use magnets consciously. Their immense force can surprise even professionals. Stay alert and respect their power.

ICD Warning

Warning for patients: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Fire warning

Powder created during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Risk of cracking

Protect your eyes. Magnets can explode upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.

Physical harm

Danger of trauma: The attraction force is so great that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Operating temperature

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

Compass and GPS

Remember: neodymium magnets produce a field that confuses precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.

Avoid contact if allergic

A percentage of the population experience a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to skin redness. It is best to use safety gloves.

This is not a toy

Adult use only. Tiny parts can be swallowed, causing intestinal necrosis. Keep away from kids and pets.

Attention! More info about hazards in the article: Safety of working with magnets.

MP 25x8x5 / N38 - ring magnet

Technical - MP 25x8x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering modeling of the product - data

Table 1: Static force (force vs gap) - characteristics MP 25x8x5 / N38

Table 2: Shear capacity (vertical surface) MP 25x8x5 / N38

Table 3: Wall mounting (shearing) - vertical pull MP 25x8x5 / N38

Table 4: Material efficiency (substrate influence) - power losses MP 25x8x5 / N38

Table 5: Thermal resistance (stability) - power drop MP 25x8x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MP 25x8x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MP 25x8x5 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 25x8x5 / N38

Table 9: Surface protection spec MP 25x8x5 / N38

Table 10: Construction data (Flux) MP 25x8x5 / N38

Table 11: Submerged application MP 25x8x5 / N38

1. Shear force

2. Plate thickness effect

3. Power loss vs temp

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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Field Strength

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Pros as well as cons of neodymium magnets.

Strengths

Disadvantages

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what it depends on?

What influences lifting capacity in practice

Safety rules for work with NdFeB magnets

Electronic devices

Safe operation

ICD Warning

Fire warning

Risk of cracking

Physical harm

Operating temperature

Compass and GPS

Avoid contact if allergic

This is not a toy

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - characteristics
MP 25x8x5 / N38

Table 2: Shear capacity (vertical surface)
MP 25x8x5 / N38

Table 3: Wall mounting (shearing) - vertical pull
MP 25x8x5 / N38

Table 4: Material efficiency (substrate influence) - power losses
MP 25x8x5 / N38

Table 5: Thermal resistance (stability) - power drop
MP 25x8x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x8x5 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures
MP 25x8x5 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 25x8x5 / N38

Table 9: Surface protection spec
MP 25x8x5 / N38

Table 10: Construction data (Flux)
MP 25x8x5 / N38

Table 11: Submerged application
MP 25x8x5 / N38