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MP 25x12.5x5 / 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 030342

GTIN/EAN: 5906301812289

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

12.5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

13.81 g

Magnetization Direction

↑ axial

Load capacity

5.98 kg / 58.67 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

technical parameters »

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Detailed specification - MP 25x12.5x5 / N38 - ring magnet

Specification / characteristics - MP 25x12.5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030342
GTIN/EAN	5906301812289
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	12.5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	13.81 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.98 kg / 58.67 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x12.5x5 / 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

These data represent the result of a mathematical calculation. Values rely on algorithms for the class Nd₂Fe₁₄B. Actual performance may deviate from the simulation results. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MP 25x12.5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N	medium risk
1 mm	5310 Gs 531.0 mT	5.05 kg / 11.14 pounds 5051.8 g / 49.6 N	medium risk
2 mm	4846 Gs 484.6 mT	4.21 kg / 9.27 pounds 4206.8 g / 41.3 N	medium risk
3 mm	4397 Gs 439.7 mT	3.46 kg / 7.64 pounds 3464.5 g / 34.0 N	medium risk
5 mm	3576 Gs 357.6 mT	2.29 kg / 5.05 pounds 2291.1 g / 22.5 N	medium risk
10 mm	2073 Gs 207.3 mT	0.77 kg / 1.70 pounds 769.7 g / 7.6 N	safe
15 mm	1231 Gs 123.1 mT	0.27 kg / 0.60 pounds 271.6 g / 2.7 N	safe
20 mm	773 Gs 77.3 mT	0.11 kg / 0.24 pounds 106.9 g / 1.0 N	safe
30 mm	356 Gs 35.6 mT	0.02 kg / 0.05 pounds 22.7 g / 0.2 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 pounds 2.4 g / 0.0 N	safe

Pulling power weakens significantly per each millimeter of gap. Keep in mind that every additional insulation layer (e.g., dirt, paint, veneer) strongly reduces the pull force. Neodymiums work most effectively in perfect adhesion; distance kills the power. Observe how flashily the pull force fall, when the product does not touch tightly to the metal substrate. When calculating the mounting, eliminate unnecessary gaps.

Table 2: Vertical capacity (vertical surface)
MP 25x12.5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.20 kg / 2.64 pounds 1196.0 g / 11.7 N
1 mm	Stal (~0.2)	1.01 kg / 2.23 pounds 1010.0 g / 9.9 N
2 mm	Stal (~0.2)	0.84 kg / 1.86 pounds 842.0 g / 8.3 N
3 mm	Stal (~0.2)	0.69 kg / 1.53 pounds 692.0 g / 6.8 N
5 mm	Stal (~0.2)	0.46 kg / 1.01 pounds 458.0 g / 4.5 N
10 mm	Stal (~0.2)	0.15 kg / 0.34 pounds 154.0 g / 1.5 N
15 mm	Stal (~0.2)	0.05 kg / 0.12 pounds 54.0 g / 0.5 N
20 mm	Stal (~0.2)	0.02 kg / 0.05 pounds 22.0 g / 0.2 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section indicates the approximate holding capacity sufficient to start the slippage of the magnet down along a vertical steel plate (assuming typical friction coefficient). The holding force is relative to the separation distance between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x12.5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.79 kg / 3.96 pounds 1794.0 g / 17.6 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.20 kg / 2.64 pounds 1196.0 g / 11.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.60 kg / 1.32 pounds 598.0 g / 5.9 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.99 kg / 6.59 pounds 2990.0 g / 29.3 N

When placing a element on a vertical surface (e.g., a board), it will maintain just approx. 1/5 of its nominal power. Gravitational force and a weak degree of grip cause that holders slip easier than they pop off the substrate. Want to create a hanger? Note that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the element will slide down under a much lighter weight. Application of an anti-slip coating can drastically raise the stability.

Table 4: Material efficiency (substrate influence) - power losses
MP 25x12.5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.60 kg / 1.32 pounds 598.0 g / 5.9 N
1 mm	25%	1.50 kg / 3.30 pounds 1495.0 g / 14.7 N
2 mm	50%	2.99 kg / 6.59 pounds 2990.0 g / 29.3 N
3 mm	75%	4.49 kg / 9.89 pounds 4485.0 g / 44.0 N
5 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N
10 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N
11 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N
12 mm	100%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N

A too thin steel is incapable of absorb the entire magnetic field, which weakens actual performance of the holder. Should you install a neodymium to a too thin substrate, the magnetism will pass right through and the holding will be smaller. To utilize the maximum of this magnet's potential, you need a suitably thick piece of metal. The saturation phenomenon means that on delicate walls (e.g., car bodies), the magnet works worse. We advise picking the steel thickness according to the table below.

Table 5: Thermal stability (stability) - power drop
MP 25x12.5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	5.98 kg / 13.18 pounds 5980.0 g / 58.7 N	OK
40 °C	-2.2%	5.85 kg / 12.89 pounds 5848.4 g / 57.4 N	OK
60 °C	-4.4%	5.72 kg / 12.60 pounds 5716.9 g / 56.1 N	OK
80 °C	-6.6%	5.59 kg / 12.31 pounds 5585.3 g / 54.8 N
100 °C	-28.8%	4.26 kg / 9.39 pounds 4257.8 g / 41.8 N

Ordinary NdFeB products lose parameters above the temperature limit. Protect against heat – high temperature can irreversibly damage this product. As the temperature rises, the neodymium's power briefly lowers. Avoid using this magnet in hot environments exceeding its operating temperature limit. Exceeding the critical threshold will cause irreversible degradation of magnetism.

*Important note: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) may lose charge permanently at lower temperatures compared to rod magnets. Red status in the table signals a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MP 25x12.5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	82.42 kg / 181.72 pounds 6 082 Gs	12.36 kg / 27.26 pounds 12364 g / 121.3 N	N/A
1 mm	75.95 kg / 167.44 pounds 11 091 Gs	11.39 kg / 25.12 pounds 11392 g / 111.8 N	68.35 kg / 150.69 pounds ~0 Gs
2 mm	69.63 kg / 153.51 pounds 10 620 Gs	10.44 kg / 23.03 pounds 10445 g / 102.5 N	62.67 kg / 138.16 pounds ~0 Gs
3 mm	63.64 kg / 140.29 pounds 10 153 Gs	9.55 kg / 21.04 pounds 9545 g / 93.6 N	57.27 kg / 126.26 pounds ~0 Gs
5 mm	52.69 kg / 116.16 pounds 9 238 Gs	7.90 kg / 17.42 pounds 7903 g / 77.5 N	47.42 kg / 104.54 pounds ~0 Gs
10 mm	31.58 kg / 69.62 pounds 7 152 Gs	4.74 kg / 10.44 pounds 4737 g / 46.5 N	28.42 kg / 62.66 pounds ~0 Gs
20 mm	10.61 kg / 23.39 pounds 4 145 Gs	1.59 kg / 3.51 pounds 1591 g / 15.6 N	9.55 kg / 21.05 pounds ~0 Gs
50 mm	0.65 kg / 1.43 pounds 1 024 Gs	0.10 kg / 0.21 pounds 97 g / 1.0 N	0.58 kg / 1.28 pounds ~0 Gs
60 mm	0.31 kg / 0.69 pounds 712 Gs	0.05 kg / 0.10 pounds 47 g / 0.5 N	0.28 kg / 0.62 pounds ~0 Gs
70 mm	0.16 kg / 0.36 pounds 514 Gs	0.02 kg / 0.05 pounds 24 g / 0.2 N	0.15 kg / 0.32 pounds ~0 Gs
80 mm	0.09 kg / 0.20 pounds 383 Gs	0.01 kg / 0.03 pounds 14 g / 0.1 N	0.08 kg / 0.18 pounds ~0 Gs
90 mm	0.05 kg / 0.12 pounds 293 Gs	0.01 kg / 0.02 pounds 8 g / 0.1 N	0.05 kg / 0.11 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 magnets attract each other from a wider radius than a neodymium and metal combination. The connection of magnet-to-magnet produces a massive flux and a wider radius of action. Planning to create a powerful holder? Apply two magnets instead of a neodymium and a steel. Remember that when attracting two neodymiums, the pinch force is massive. The repulsion force is marginally weaker than the connection force, but still significant.
*Field value for N-N configuration drops to ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Important: Calculations apply to friction force of two identical magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Protective zones (implants) - warnings
MP 25x12.5x5 / 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
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 poses a real danger to electronic devices and medical implants. These NdFeB products generate a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation passes through tissues and glass. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, remotes, membranes, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - warning
MP 25x12.5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.61 km/h (6.28 m/s)	0.27 J
30 mm	36.44 km/h (10.12 m/s)	0.71 J
50 mm	46.94 km/h (13.04 m/s)	1.17 J
100 mm	66.37 km/h (18.43 m/s)	2.35 J

Magnetic elements are very brittle – a strong collision with metal risks their cracking. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy can cause material chips or injury to fingers. Always hold the magnet during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when handling with large magnets.

Table 9: Surface protection spec
MP 25x12.5x5 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (P_c)
MP 25x12.5x5 / N38

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

Flux value emitted by the magnet pole. Essential parameter for generator designers as well as sensors. The P_c coefficient determines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MP 25x12.5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	5.98 kg	Standard
Water (riverbed)	6.85 kg (+0.87 kg buoyancy gain)	+14.5%

Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

The magnetic field penetrates through water without any losses. However, remember the water resistance when pulling the rope quickly.

1. Sliding resistance

*Note: On a vertical wall, the magnet holds merely approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Heat tolerance

*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) = 1.03

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

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: 030342-2026

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The ring magnet with a hole MP 25x12.5x5 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables quick installation to wood, wall, plastic, or metal. 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. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. 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.

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

This model is characterized by dimensions Ø25x5 mm and a weight of 13.81 g. The key parameter here is the lifting capacity amounting to approximately 5.98 kg (force ~58.67 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 12.5 mm.

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

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Benefits

Besides their exceptional strength, neodymium magnets offer the following advantages:

They retain full power for almost 10 years – the loss is just ~1% (based on simulations),
Neodymium magnets are distinguished by extremely resistant to loss of magnetic properties caused by external interference,
A magnet with a smooth nickel surface has an effective appearance,
The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
In view of the ability of precise molding and adaptation to unique requirements, NdFeB magnets can be manufactured in a broad palette of geometric configurations, which amplifies use scope,
Universal use in modern industrial fields – they serve a role in hard drives, motor assemblies, medical equipment, as well as complex engineering applications.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Cons

What to avoid - cons of neodymium magnets and proposals for their use:

To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
Due to limitations in realizing threads and complex forms in magnets, we propose using cover - magnetic holder.
Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Additionally, small elements of these devices can complicate diagnosis medical after entering the body.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

Magnet power was determined for the most favorable conditions, taking into account:

on a block made of mild steel, perfectly concentrating the magnetic flux
with a thickness no less than 10 mm
with an ground contact surface
without the slightest air gap between the magnet and steel
during pulling in a direction perpendicular to the plane
at conditions approx. 20°C

Determinants of practical lifting force of a magnet

During everyday use, the actual lifting capacity results from many variables, ranked from the most important:

Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
Steel grade – ideal substrate is pure iron steel. Hardened steels may attract less.
Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Warnings

Cards and drives

Equipment safety: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, timepieces).

Keep away from electronics

Be aware: neodymium magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, tablet, and navigation systems.

Physical harm

Protect your hands. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Handling rules

Use magnets with awareness. Their powerful strength can shock even professionals. Stay alert and respect their force.

Allergic reactions

Some people suffer from a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Prolonged contact might lead to a rash. We strongly advise use safety gloves.

Shattering risk

Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets leads to them breaking into shards.

ICD Warning

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

Thermal limits

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Danger to the youngest

NdFeB magnets are not intended for children. Eating several magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Mechanical processing

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Safety First! More info about risks in the article: Safety of working with magnets.

MP 25x12.5x5 / N38 - ring magnet

Detailed specification - MP 25x12.5x5 / 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 pull force (force vs gap) - characteristics MP 25x12.5x5 / N38

Table 2: Vertical capacity (vertical surface) MP 25x12.5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull MP 25x12.5x5 / N38

Table 4: Material efficiency (substrate influence) - power losses MP 25x12.5x5 / N38

Table 5: Thermal stability (stability) - power drop MP 25x12.5x5 / N38

Table 6: Two magnets (attraction) - forces in the system MP 25x12.5x5 / N38

Table 7: Protective zones (implants) - warnings MP 25x12.5x5 / N38

Table 8: Dynamics (cracking risk) - warning MP 25x12.5x5 / N38

Table 9: Surface protection spec MP 25x12.5x5 / N38

Table 10: Electrical data (Pc) MP 25x12.5x5 / N38

Table 11: Hydrostatics and buoyancy MP 25x12.5x5 / N38

1. Sliding resistance

2. Steel saturation

3. Heat tolerance

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

Elemental analysis

Sustainability

Magnet pull force

Magnetic Field

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Strengths and weaknesses of Nd2Fe14B magnets.

Benefits

Cons

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

Determinants of practical lifting force of a magnet

Warnings

Cards and drives

Keep away from electronics

Physical harm

Handling rules

Allergic reactions

Shattering risk

ICD Warning

Thermal limits

Danger to the youngest

Mechanical processing

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - characteristics
MP 25x12.5x5 / N38

Table 2: Vertical capacity (vertical surface)
MP 25x12.5x5 / N38

Table 3: Vertical assembly (shearing) - vertical pull
MP 25x12.5x5 / N38

Table 4: Material efficiency (substrate influence) - power losses
MP 25x12.5x5 / N38

Table 5: Thermal stability (stability) - power drop
MP 25x12.5x5 / N38

Table 6: Two magnets (attraction) - forces in the system
MP 25x12.5x5 / N38

Table 7: Protective zones (implants) - warnings
MP 25x12.5x5 / N38

Table 8: Dynamics (cracking risk) - warning
MP 25x12.5x5 / N38

Table 9: Surface protection spec
MP 25x12.5x5 / N38

Table 10: Electrical data (P_c)
MP 25x12.5x5 / N38

Table 11: Hydrostatics and buoyancy
MP 25x12.5x5 / N38

Strengths and weaknesses of Nd₂Fe₁₄B magnets.