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MP 25x13x4 / 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 030190

GTIN/EAN: 5906301812074

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

13 mm [±0,1 mm]

Height

4 mm [±0,1 mm]

Weight

10.74 g

Magnetization Direction

↑ axial

Load capacity

4.14 kg / 40.57 N

Magnetic Induction

188.92 mT / 1889 Gs

Coating

[NiCuNi] Nickel

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Technical - MP 25x13x4 / N38 - ring magnet

Specification / characteristics - MP 25x13x4 / N38 - ring magnet

properties

properties	values
Cat. no.	030190
GTIN/EAN	5906301812074
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	4 mm [±0,1 mm]
Weight	10.74 g
Magnetization Direction	↑ axial
Load capacity ~ ?	4.14 kg / 40.57 N
Magnetic Induction ~ ?	188.92 mT / 1889 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x13x4 / N38 - ring magnet

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°F
Specific resistance	150	μΩ⋅cm
Bending strength	250	MPa
Compressive strength	1000~1100	MPa
Thermal expansion parallel (∥) to orientation (M)	(3-4) x 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Engineering simulation of the magnet - data

Presented information constitute the direct effect of a physical calculation. Values rely on models for the class Nd₂Fe₁₄B. Actual parameters might slightly deviate from the simulation results. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs distance) - power drop
MP 25x13x4 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	4.14 kg / 9.13 lbs 4140.0 g / 40.6 N	warning
1 mm	5310 Gs 531.0 mT	3.50 kg / 7.71 lbs 3497.4 g / 34.3 N	warning
2 mm	4846 Gs 484.6 mT	2.91 kg / 6.42 lbs 2912.4 g / 28.6 N	warning
3 mm	4397 Gs 439.7 mT	2.40 kg / 5.29 lbs 2398.5 g / 23.5 N	warning
5 mm	3576 Gs 357.6 mT	1.59 kg / 3.50 lbs 1586.2 g / 15.6 N	safe
10 mm	2073 Gs 207.3 mT	0.53 kg / 1.17 lbs 532.9 g / 5.2 N	safe
15 mm	1231 Gs 123.1 mT	0.19 kg / 0.41 lbs 188.0 g / 1.8 N	safe
20 mm	773 Gs 77.3 mT	0.07 kg / 0.16 lbs 74.0 g / 0.7 N	safe
30 mm	356 Gs 35.6 mT	0.02 kg / 0.03 lbs 15.7 g / 0.2 N	safe
50 mm	115 Gs 11.5 mT	0.00 kg / 0.00 lbs 1.6 g / 0.0 N	safe

Grip strength drops sharply with every subsequent millimeter of spacing. Keep in mind that even a very thin break (e.g., dirt, varnish, dust) strongly diminishes the holding power. Magnets work optimally in perfect adhesion; air break nullifies the power. See how rapidly the parameters fall, when the magnet does not adhere tightly to the steel surface. When designing the arrangement, discard unnecessary gaps.

Table 2: Vertical load (wall)
MP 25x13x4 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.83 kg / 1.83 lbs 828.0 g / 8.1 N
1 mm	Stal (~0.2)	0.70 kg / 1.54 lbs 700.0 g / 6.9 N
2 mm	Stal (~0.2)	0.58 kg / 1.28 lbs 582.0 g / 5.7 N
3 mm	Stal (~0.2)	0.48 kg / 1.06 lbs 480.0 g / 4.7 N
5 mm	Stal (~0.2)	0.32 kg / 0.70 lbs 318.0 g / 3.1 N
10 mm	Stal (~0.2)	0.11 kg / 0.23 lbs 106.0 g / 1.0 N
15 mm	Stal (~0.2)	0.04 kg / 0.08 lbs 38.0 g / 0.4 N
20 mm	Stal (~0.2)	0.01 kg / 0.03 lbs 14.0 g / 0.1 N
30 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 lbs 0.0 g / 0.0 N

The table below calculates the approximate force needed to cause the shifting of the magnet downwards on a upright steel wall (assuming standard friction). This value is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x13x4 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	1.24 kg / 2.74 lbs 1242.0 g / 12.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.83 kg / 1.83 lbs 828.0 g / 8.1 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.41 kg / 0.91 lbs 414.0 g / 4.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	2.07 kg / 4.56 lbs 2070.0 g / 20.3 N

When mounting a holder on a upright plane (e.g., a car body), it will only hold just about 20%-30% of its maximum pull force. Gravity as well as a weak degree of grip influence the fact that holders move down easier than they detach. Want to create a vertical fastening? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a noticeably lighter weight. Using a rubber layer can drastically raise the stability.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 25x13x4 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.41 kg / 0.91 lbs 414.0 g / 4.1 N
1 mm	25%	1.04 kg / 2.28 lbs 1035.0 g / 10.2 N
2 mm	50%	2.07 kg / 4.56 lbs 2070.0 g / 20.3 N
3 mm	75%	3.10 kg / 6.85 lbs 3105.0 g / 30.5 N
5 mm	100%	4.14 kg / 9.13 lbs 4140.0 g / 40.6 N
10 mm	100%	4.14 kg / 9.13 lbs 4140.0 g / 40.6 N
11 mm	100%	4.14 kg / 9.13 lbs 4140.0 g / 40.6 N
12 mm	100%	4.14 kg / 9.13 lbs 4140.0 g / 40.6 N

A too thin steel is unable to take in the full magnetic flux, which wastes potential of the magnet. Should you mount a strong magnet to a weak sheet, the flux will penetrate right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid piece of steel. The saturation effect causes that on thin elements (e.g., car bodies), the holder works worse. We recommend selecting the steel thickness from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MP 25x13x4 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	4.14 kg / 9.13 lbs 4140.0 g / 40.6 N	OK
40 °C	-2.2%	4.05 kg / 8.93 lbs 4048.9 g / 39.7 N	OK
60 °C	-4.4%	3.96 kg / 8.73 lbs 3957.8 g / 38.8 N	OK
80 °C	-6.6%	3.87 kg / 8.52 lbs 3866.8 g / 37.9 N
100 °C	-28.8%	2.95 kg / 6.50 lbs 2947.7 g / 28.9 N

Ordinary NdFeB products lose strength above the temperature limit. Protect against heat – high temperature can permanently demagnetize this product. As the temperature rises, the neodymium's power momentarily drops. Avoid using this product close to heaters higher than its safe range. Exceeding the critical threshold will cause permanent loss of magnetism.

*Important note: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) may lose charge permanently at lower temperatures than taller cylinders. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 25x13x4 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	83.66 kg / 184.44 lbs 6 082 Gs	12.55 kg / 27.67 lbs 12549 g / 123.1 N	N/A
1 mm	77.09 kg / 169.95 lbs 11 091 Gs	11.56 kg / 25.49 lbs 11563 g / 113.4 N	69.38 kg / 152.95 lbs ~0 Gs
2 mm	70.68 kg / 155.81 lbs 10 620 Gs	10.60 kg / 23.37 lbs 10601 g / 104.0 N	63.61 kg / 140.23 lbs ~0 Gs
3 mm	64.59 kg / 142.40 lbs 10 153 Gs	9.69 kg / 21.36 lbs 9689 g / 95.0 N	58.13 kg / 128.16 lbs ~0 Gs
5 mm	53.48 kg / 117.90 lbs 9 238 Gs	8.02 kg / 17.68 lbs 8022 g / 78.7 N	48.13 kg / 106.11 lbs ~0 Gs
10 mm	32.05 kg / 70.66 lbs 7 152 Gs	4.81 kg / 10.60 lbs 4808 g / 47.2 N	28.85 kg / 63.60 lbs ~0 Gs
20 mm	10.77 kg / 23.74 lbs 4 145 Gs	1.62 kg / 3.56 lbs 1615 g / 15.8 N	9.69 kg / 21.37 lbs ~0 Gs
50 mm	0.66 kg / 1.45 lbs 1 024 Gs	0.10 kg / 0.22 lbs 99 g / 1.0 N	0.59 kg / 1.30 lbs ~0 Gs
60 mm	0.32 kg / 0.70 lbs 712 Gs	0.05 kg / 0.10 lbs 48 g / 0.5 N	0.29 kg / 0.63 lbs ~0 Gs
70 mm	0.17 kg / 0.36 lbs 514 Gs	0.02 kg / 0.05 lbs 25 g / 0.2 N	0.15 kg / 0.33 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 / 0.07 lbs ~0 Gs

Two strong neodymiums interact from a much further distance than a neodymium and metal combination. Such a system of two magnets generates a stronger field and a larger range of operation. Planning to create a powerful holder? Use a pair of magnets instead of one magnet and a steel. Be careful that when attracting two neodymiums, the collision energy is extreme. The repulsion force is slightly lower than the connection force, but still significant.
*Flux density between like poles reaches ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
* Estimates show shear force of two matching magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (electronics) - precautionary measures
MP 25x13x4 / 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
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 IT equipment as well as pacemakers. These neodymiums produce a field that disrupts operation of sensitive medical devices. Be aware: the invisible magnetic field acts through matter and housings. Special caution must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, car keys, speakers, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
MP 25x13x4 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.33 km/h (5.93 m/s)	0.19 J
30 mm	34.38 km/h (9.55 m/s)	0.49 J
50 mm	44.29 km/h (12.30 m/s)	0.81 J
100 mm	62.62 km/h (17.39 m/s)	1.62 J

NdFeB products are prone to chipping – a collision with steel causes immediate chipping. Control the attraction moment – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or painful pinches to fingers. Hold the magnet firmly during bringing near metal so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when playing with large magnets.

Table 9: Anti-corrosion coating durability
MP 25x13x4 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Flux)
MP 25x13x4 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	24 861 Mx	248.6 µWb
P_c Coefficient	1.02	High (Stable)

Flux value emitted by the magnet pole. Essential parameter in coil applications and motors. The P_c coefficient determines the working geometry.

Table 11: Submerged application
MP 25x13x4 / N38

Environment	Effective steel pull	Effect
Air (land)	4.14 kg	Standard
Water (riverbed)	4.74 kg (+0.60 kg buoyancy gain)	+14.5%

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. Sliding resistance

*Note: On a vertical surface, the magnet retains merely ~20% of its nominal pull.

2. Plate thickness effect

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

3. Thermal stability

*For N38 grade, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.02

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 and environmental data

Material specification

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: 030190-2026

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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 4.14 kg works great as a cabinet closure, speaker holder, or mounting element in devices.

This is a crucial issue when working with model MP 25x13x4 / 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. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for indoor use. For outdoor applications, we recommend choosing rubberized holders or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 13 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.

This model is characterized by dimensions Ø25x4 mm and a weight of 10.74 g. The pulling force of this model is an impressive 4.14 kg, which translates to 40.57 N in newtons. The mounting hole diameter is precisely 13 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Pros and cons of rare earth magnets.

Strengths

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

They do not lose strength, even during around 10 years – the drop in power is only ~1% (based on measurements),
They are extremely resistant to demagnetization induced by external field influence,
Thanks to the metallic finish, the plating of nickel, gold-plated, or silver-plated gives an professional appearance,
Magnets are distinguished by extremely high magnetic induction on the active area,
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 precise machining and optimizing to complex requirements,
Wide application in future technologies – they are used in data components, electric motors, medical equipment, and modern systems.
Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Cons

What to avoid - cons of neodymium magnets: weaknesses and usage proposals

To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
Due to limitations in realizing nuts and complex forms in magnets, we propose using cover - magnetic mount.
Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these magnets can be problematic in diagnostics medical when they are in the body.
With large orders the cost of neodymium magnets is a challenge,

Holding force characteristics

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

Breakaway force was defined for optimal configuration, including:

on a plate made of structural steel, optimally conducting the magnetic field
with a cross-section no less than 10 mm
with a surface perfectly flat
without the slightest clearance between the magnet and steel
for force applied at a right angle (in the magnet axis)
in neutral thermal conditions

What influences lifting capacity in practice

Real force is influenced by specific conditions, including (from most important):

Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Substrate thickness – to utilize 100% power, 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. Hardened steels may have worse magnetic properties.
Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet and the plate decreases the load capacity.

H&S for magnets

Magnet fragility

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets will cause them breaking into shards.

Electronic hazard

Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Pacemakers

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Compass and GPS

GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.

Product not for children

These products are not toys. Eating several magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and necessitates immediate surgery.

Finger safety

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

Sensitization to coating

Some people suffer from a sensitization to nickel, which is the standard coating for NdFeB magnets. Prolonged contact might lead to an allergic reaction. We recommend use safety gloves.

Do not overheat magnets

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.

Handling guide

Handle magnets consciously. Their huge power can surprise even professionals. Be vigilant and do not underestimate their power.

Dust is flammable

Dust produced during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

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

MP 25x13x4 / N38 - ring magnet

Technical - MP 25x13x4 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering simulation of the magnet - data

Table 1: Static force (force vs distance) - power drop MP 25x13x4 / N38

Table 2: Vertical load (wall) MP 25x13x4 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MP 25x13x4 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MP 25x13x4 / N38

Table 5: Thermal resistance (material behavior) - thermal limit MP 25x13x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MP 25x13x4 / N38

Table 7: Hazards (electronics) - precautionary measures MP 25x13x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects MP 25x13x4 / N38

Table 9: Anti-corrosion coating durability MP 25x13x4 / N38

Table 10: Construction data (Flux) MP 25x13x4 / N38

Table 11: Submerged application MP 25x13x4 / N38

1. Sliding resistance

2. Plate thickness effect

3. Thermal stability

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

Material specification

Ecology and recycling (GPSR)

Pulling force

Field Strength

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Pros and cons of rare earth magnets.

Strengths

Cons

Holding force characteristics

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

What influences lifting capacity in practice

H&S for magnets

Magnet fragility

Electronic hazard

Pacemakers

Compass and GPS

Product not for children

Finger safety

Sensitization to coating

Do not overheat magnets

Handling guide

Dust is flammable

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - power drop
MP 25x13x4 / N38

Table 2: Vertical load (wall)
MP 25x13x4 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x13x4 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 25x13x4 / N38

Table 5: Thermal resistance (material behavior) - thermal limit
MP 25x13x4 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MP 25x13x4 / N38

Table 7: Hazards (electronics) - precautionary measures
MP 25x13x4 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MP 25x13x4 / N38

Table 9: Anti-corrosion coating durability
MP 25x13x4 / N38

Table 10: Construction data (Flux)
MP 25x13x4 / N38

Table 11: Submerged application
MP 25x13x4 / N38