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MP 25x13x8 / 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 030191

GTIN/EAN: 5906301812081

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

13 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

21.49 g

Magnetization Direction

↑ axial

Load capacity

10.49 kg / 102.90 N

Magnetic Induction

334.09 mT / 3341 Gs

Coating

[NiCuNi] Nickel

see parameters »

13.53 ZŁ with VAT / pcs + price for transport

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Technical - MP 25x13x8 / N38 - ring magnet

Specification / characteristics - MP 25x13x8 / N38 - ring magnet

properties

properties	values
Cat. no.	030191
GTIN/EAN	5906301812081
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	13 mm [±0,1 mm]
Height	8 mm [±0,1 mm]
Weight	21.49 g
Magnetization Direction	↑ axial
Load capacity ~ ?	10.49 kg / 102.90 N
Magnetic Induction ~ ?	334.09 mT / 3341 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x13x8 / 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 product - report

Presented values are the result of a engineering analysis. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Operational parameters may deviate from the simulation results. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs gap) - characteristics
MP 25x13x8 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	10.49 kg / 23.13 pounds 10490.0 g / 102.9 N	dangerous!
1 mm	5310 Gs 531.0 mT	8.86 kg / 19.54 pounds 8861.7 g / 86.9 N	medium risk
2 mm	4846 Gs 484.6 mT	7.38 kg / 16.27 pounds 7379.4 g / 72.4 N	medium risk
3 mm	4397 Gs 439.7 mT	6.08 kg / 13.40 pounds 6077.4 g / 59.6 N	medium risk
5 mm	3576 Gs 357.6 mT	4.02 kg / 8.86 pounds 4019.0 g / 39.4 N	medium risk
10 mm	2073 Gs 207.3 mT	1.35 kg / 2.98 pounds 1350.2 g / 13.2 N	low risk
15 mm	1231 Gs 123.1 mT	0.48 kg / 1.05 pounds 476.4 g / 4.7 N	low risk
20 mm	773 Gs 77.3 mT	0.19 kg / 0.41 pounds 187.6 g / 1.8 N	low risk
30 mm	356 Gs 35.6 mT	0.04 kg / 0.09 pounds 39.8 g / 0.4 N	low risk
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 pounds 4.1 g / 0.0 N	low risk

Pulling power drops sharply with every subsequent millimeter of distance. Remember that even a very thin break (e.g., dirt, varnish, veneer) noticeably weakens the grip. Neodymiums hold optimally during direct contact; gap kills the power. Analyze how rapidly the parameters fall, when the product does not adhere directly to the steel surface. When designing the assembly, eliminate unnecessary gaps.

Table 2: Vertical load (vertical surface)
MP 25x13x8 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	2.10 kg / 4.63 pounds 2098.0 g / 20.6 N
1 mm	Stal (~0.2)	1.77 kg / 3.91 pounds 1772.0 g / 17.4 N
2 mm	Stal (~0.2)	1.48 kg / 3.25 pounds 1476.0 g / 14.5 N
3 mm	Stal (~0.2)	1.22 kg / 2.68 pounds 1216.0 g / 11.9 N
5 mm	Stal (~0.2)	0.80 kg / 1.77 pounds 804.0 g / 7.9 N
10 mm	Stal (~0.2)	0.27 kg / 0.60 pounds 270.0 g / 2.6 N
15 mm	Stal (~0.2)	0.10 kg / 0.21 pounds 96.0 g / 0.9 N
20 mm	Stal (~0.2)	0.04 kg / 0.08 pounds 38.0 g / 0.4 N
30 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section shows the theoretical holding capacity needed to cause the downward movement of the magnet downwards on a upright steel wall (assuming typical friction). This parameter varies with the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x13x8 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	3.15 kg / 6.94 pounds 3147.0 g / 30.9 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	2.10 kg / 4.63 pounds 2098.0 g / 20.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.05 kg / 2.31 pounds 1049.0 g / 10.3 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	5.25 kg / 11.56 pounds 5245.0 g / 51.5 N

When mounting a magnet on a vertical surface (e.g., a fridge), it will only hold only approx. 20%-30% of its maximum pull force. Gravity and a low friction coefficient influence the fact that products slip faster than they pop off the substrate. Want to create a hanger? Note that the shear force is significantly lower than the perpendicular breakaway force. On a slippery surface, the magnet will give way down under a noticeably lighter cargo. Using a rubber coating can drastically raise the stability.

Table 4: Steel thickness (saturation) - power losses
MP 25x13x8 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.52 kg / 1.16 pounds 524.5 g / 5.1 N
1 mm	13%	1.31 kg / 2.89 pounds 1311.3 g / 12.9 N
2 mm	25%	2.62 kg / 5.78 pounds 2622.5 g / 25.7 N
3 mm	38%	3.93 kg / 8.67 pounds 3933.8 g / 38.6 N
5 mm	63%	6.56 kg / 14.45 pounds 6556.3 g / 64.3 N
10 mm	100%	10.49 kg / 23.13 pounds 10490.0 g / 102.9 N
11 mm	100%	10.49 kg / 23.13 pounds 10490.0 g / 102.9 N
12 mm	100%	10.49 kg / 23.13 pounds 10490.0 g / 102.9 N

A thin metal plate is incapable of focus the entire magnetic field, which squanders power of the magnet. If you mount a strong magnet to a too thin substrate, the field will pass right through and the pull force will drop sharply. To utilize 100% of this magnet's potential, you need a suitably thick element of metal. The saturation effect causes that on thin elements (e.g., appliance housings), the magnet holds weaker. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal stability (stability) - power drop
MP 25x13x8 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	10.49 kg / 23.13 pounds 10490.0 g / 102.9 N	OK
40 °C	-2.2%	10.26 kg / 22.62 pounds 10259.2 g / 100.6 N	OK
60 °C	-4.4%	10.03 kg / 22.11 pounds 10028.4 g / 98.4 N	OK
80 °C	-6.6%	9.80 kg / 21.60 pounds 9797.7 g / 96.1 N
100 °C	-28.8%	7.47 kg / 16.47 pounds 7468.9 g / 73.3 N

Standard neodymium magnets irreversibly lose parameters above the temperature limit. Watch out for overheating – heat can irreversibly damage this product. With every degree above norm, the magnet's power briefly lowers. Do not use this magnet in hot environments exceeding its operating temperature limit. Exceeding the critical threshold will cause irreversible degradation of magnetic properties.

*Engineering note: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Thin magnets (low Pc) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Warning indicator in the table points to permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field range
MP 25x13x8 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	77.07 kg / 169.90 pounds 6 082 Gs	11.56 kg / 25.49 pounds 11560 g / 113.4 N	N/A
1 mm	71.01 kg / 156.55 pounds 11 091 Gs	10.65 kg / 23.48 pounds 10652 g / 104.5 N	63.91 kg / 140.90 pounds ~0 Gs
2 mm	65.10 kg / 143.53 pounds 10 620 Gs	9.77 kg / 21.53 pounds 9766 g / 95.8 N	58.59 kg / 129.18 pounds ~0 Gs
3 mm	59.50 kg / 131.17 pounds 10 153 Gs	8.92 kg / 19.68 pounds 8925 g / 87.6 N	53.55 kg / 118.06 pounds ~0 Gs
5 mm	49.26 kg / 108.61 pounds 9 238 Gs	7.39 kg / 16.29 pounds 7389 g / 72.5 N	44.34 kg / 97.74 pounds ~0 Gs
10 mm	29.53 kg / 65.10 pounds 7 152 Gs	4.43 kg / 9.76 pounds 4429 g / 43.4 N	26.57 kg / 58.59 pounds ~0 Gs
20 mm	9.92 kg / 21.87 pounds 4 145 Gs	1.49 kg / 3.28 pounds 1488 g / 14.6 N	8.93 kg / 19.68 pounds ~0 Gs
50 mm	0.61 kg / 1.33 pounds 1 024 Gs	0.09 kg / 0.20 pounds 91 g / 0.9 N	0.54 kg / 1.20 pounds ~0 Gs
60 mm	0.29 kg / 0.64 pounds 712 Gs	0.04 kg / 0.10 pounds 44 g / 0.4 N	0.26 kg / 0.58 pounds ~0 Gs
70 mm	0.15 kg / 0.34 pounds 514 Gs	0.02 kg / 0.05 pounds 23 g / 0.2 N	0.14 kg / 0.30 pounds ~0 Gs
80 mm	0.08 kg / 0.19 pounds 383 Gs	0.01 kg / 0.03 pounds 13 g / 0.1 N	0.08 kg / 0.17 pounds ~0 Gs
90 mm	0.05 kg / 0.11 pounds 293 Gs	0.01 kg / 0.02 pounds 7 g / 0.1 N	0.04 kg / 0.10 pounds ~0 Gs
100 mm	0.03 kg / 0.07 pounds 230 Gs	0.00 kg / 0.01 pounds 5 g / 0.0 N	0.03 kg / 0.06 pounds ~0 Gs

Two strong neodymiums interact from a wider radius than a neodymium and metal combination. Such a system of magnet-to-magnet produces a massive flux and a further horizon of performance. Want to build a strong closure? Use a pair of magnets instead of a neodymium and a striker plate. Remember that when connecting a pair of magnets, the pinch force is huge. The levitation is slightly lower than the attraction, but still large.
*Field value for N-N configuration reaches ~0 Gs at the midpoint of the gap (due to field cancellation).
Attention: Results refer to friction force of a pair of identical magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - precautionary measures
MP 25x13x8 / 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
Phone / Smartphone	40 Gs (4.0 mT)	8.0 cm
Car key	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 produce a flux that prevents correct functioning of sensitive medical devices. Be aware: the invisible magnetic field penetrates the body and housings. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, remotes, speakers, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MP 25x13x8 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	24.01 km/h (6.67 m/s)	0.48 J
30 mm	38.68 km/h (10.75 m/s)	1.24 J
50 mm	49.84 km/h (13.84 m/s)	2.06 J
100 mm	70.46 km/h (19.57 m/s)	4.12 J

Neodymium magnets are very brittle – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose turns into a projectile. Kinetic force can trigger coating fragments or injury to fingers. Be sure to control the product during bringing near metal so it doesn't hit violently against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear safety glasses when handling with large magnets.

Table 9: Corrosion resistance
MP 25x13x8 / 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: Electrical data (P_c)
MP 25x13x8 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	23 118 Mx	231.2 µWb
P_c Coefficient	1.04	High (Stable)

Flux value passing through the pole surface. Key data in coil applications as well as sensors. The P_c coefficient defines the magnet's operating point.

Table 11: Physics of underwater searching
MP 25x13x8 / N38

Environment	Effective steel pull	Effect
Air (land)	10.49 kg	Standard
Water (riverbed)	12.01 kg (+1.52 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Warning: On a vertical surface, the magnet retains merely ~20% of its max power.

2. Plate thickness effect

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Temperature resistance

*For N38 grade, 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) = 1.04

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%

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: 030191-2026

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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. Mounting is clean and reversible, unlike gluing. This product with a force of 10.49 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 25x13x8 / 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 does not ensure full waterproofing. In the place of the mounting hole, the coating is thinner and can be damaged when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 13 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

It is a magnetic ring with a diameter of 25 mm and thickness 8 mm. The pulling force of this model is an impressive 10.49 kg, which translates to 102.90 N in newtons. The mounting hole diameter is precisely 13 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.

Strengths as well as weaknesses of rare earth magnets.

Pros

Apart from their notable magnetism, neodymium magnets have these key benefits:

They retain attractive force for nearly 10 years – the loss is just ~1% (based on simulations),
They have excellent resistance to magnetism drop when exposed to external fields,
A magnet with a shiny gold surface has an effective appearance,
Neodymium magnets ensure maximum magnetic induction on a contact point, which allows for strong attraction,
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...
Possibility of exact creating and modifying to specific conditions,
Key role in modern industrial fields – they serve a role in HDD drives, electromotive mechanisms, diagnostic systems, as well as complex engineering applications.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Disadvantages

Disadvantages of neodymium magnets:

At strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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 resistant to moisture, when using outdoors
Due to limitations in realizing threads and complex forms in magnets, we recommend using cover - magnetic holder.
Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices can complicate diagnosis medical after entering the body.
Due to neodymium price, their price is relatively high,

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

The lifting capacity listed is a theoretical maximum value executed under the following configuration:

using a sheet made of mild steel, serving as a ideal flux conductor
whose thickness equals approx. 10 mm
with a surface perfectly flat
with direct contact (without impurities)
under axial application of breakaway force (90-degree angle)
in temp. approx. 20°C

Key elements affecting lifting force

Holding efficiency impacted by working environment parameters, including (from priority):

Distance (betwixt the magnet and the plate), because even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
Material type – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with neodymium magnets

Keep away from electronics

Navigation devices and mobile phones are highly susceptible to magnetic fields. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Data carriers

Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, timepieces).

Warning for heart patients

For implant holders: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or ask another person to work with the magnets.

Sensitization to coating

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction happens, cease handling magnets and wear gloves.

Operating temperature

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

Hand protection

Watch your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Dust explosion hazard

Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Fragile material

Protect your eyes. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

This is not a toy

Strictly store magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.

Do not underestimate power

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

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?

MP 25x13x8 / N38 - ring magnet

Technical - MP 25x13x8 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the product - report

Table 1: Static force (force vs gap) - characteristics MP 25x13x8 / N38

Table 2: Vertical load (vertical surface) MP 25x13x8 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 25x13x8 / N38

Table 4: Steel thickness (saturation) - power losses MP 25x13x8 / N38

Table 5: Thermal stability (stability) - power drop MP 25x13x8 / N38

Table 6: Two magnets (attraction) - field range MP 25x13x8 / N38

Table 7: Protective zones (implants) - precautionary measures MP 25x13x8 / N38

Table 8: Collisions (kinetic energy) - collision effects MP 25x13x8 / N38

Table 9: Corrosion resistance MP 25x13x8 / N38

Table 10: Electrical data (Pc) MP 25x13x8 / N38

Table 11: Physics of underwater searching MP 25x13x8 / N38

1. Shear force

2. Plate thickness effect

3. Temperature resistance

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

Elemental analysis

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

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Strengths as well as weaknesses of rare earth magnets.

Pros

Disadvantages

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Key elements affecting lifting force

Safety rules for work with neodymium magnets

Keep away from electronics

Data carriers

Warning for heart patients

Sensitization to coating

Operating temperature

Hand protection

Dust explosion hazard

Fragile material

This is not a toy

Do not underestimate power

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs gap) - characteristics
MP 25x13x8 / N38

Table 2: Vertical load (vertical surface)
MP 25x13x8 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x13x8 / N38

Table 4: Steel thickness (saturation) - power losses
MP 25x13x8 / N38

Table 5: Thermal stability (stability) - power drop
MP 25x13x8 / N38

Table 6: Two magnets (attraction) - field range
MP 25x13x8 / N38

Table 7: Protective zones (implants) - precautionary measures
MP 25x13x8 / N38

Table 8: Collisions (kinetic energy) - collision effects
MP 25x13x8 / N38

Table 9: Corrosion resistance
MP 25x13x8 / N38

Table 10: Electrical data (P_c)
MP 25x13x8 / N38

Table 11: Physics of underwater searching
MP 25x13x8 / N38