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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

check technical specifications »

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Technical details - 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 analysis of the product - technical parameters

These data constitute the direct effect of a engineering analysis. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Actual performance may differ. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (pull 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	weak grip
15 mm	1231 Gs 123.1 mT	0.33 kg / 0.72 LBS 325.2 g / 3.2 N	weak grip
20 mm	773 Gs 77.3 mT	0.13 kg / 0.28 LBS 128.0 g / 1.3 N	weak grip
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 LBS 27.2 g / 0.3 N	weak grip
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 LBS 2.8 g / 0.0 N	weak grip

Pulling power decreases drastically with every subsequent millimeter of gap. Keep in mind that even the smallest gap (e.g., contamination, paint, rust) strongly reduces the pull force. Magnetic products hold strongest at the point of direct contact; distance kills the power. Analyze how quickly the load capacity fall, when the magnet does not touch flatly to the metal substrate. When planning the arrangement, discard unnecessary gaps.

Table 2: Sliding 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

This section defines the approximate shear load necessary to start the sliding of the magnet down on a upright steel wall (assuming typical friction). The holding force varies with the air gap between the magnet and the surface.

Table 3: Wall mounting (sliding) - 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 upright surface (e.g., a fridge), it will maintain just approx. 1/5 of its maximum pull force. Gravity as well as a low friction coefficient mean that holders slip faster than they pull off. Want to create a vertical fastening? Consider that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the magnet will give way down under a noticeably lighter weight. Application of an anti-slip layer can drastically 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 too thin steel is incapable of take in the entire magnetic field, which weakens actual performance of the magnet. If you mount a strong magnet to a too thin substrate, the magnetism will penetrate right through and the holding will be smaller. To achieve 100% of this magnet's power, you require a sufficiently solid backing of steel. The saturation effect causes that on delicate walls (e.g., car bodies), the magnet shows lower pull force. We recommend selecting the steel cross-section from these parameters.

Table 5: Thermal resistance (stability) - thermal limit
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 past the thermal threshold. Avoid high temperatures – high temperature can permanently damage this product. With every degree above norm, the neodymium's force briefly lowers. Do not use this magnet near heat sources exceeding its safe range. Ignoring the limit will result in permanent loss of magnetic properties.

*Important note: Temperature resistance is determined by both grade, but also on the magnet's shape. Low-profile magnets (low permeance coefficient) may lose charge permanently sooner than taller cylinders. The danger warning in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field range
MP 25x8x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear 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 magnets interact from a wider radius than a magnet and steel combination. The setup of magnet-to-magnet creates a more powerful interaction and a wider radius of operation. Want to build a strong closure? Utilize two neodymiums instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the impact force is extreme. The repulsion force is marginally weaker than the attraction, but still significant.
*Flux density for N-N configuration reaches ~0 Gs in the exact middle between the magnets (due to field cancellation).
Note: Results show sliding force of two identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - warnings
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 poses a real danger to electronic devices and medical implants. These neodymiums produce a flux that disrupts operation of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and housings. Increased vigilance must be taken by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Impact energy (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

NdFeB products are delicate – a violent impact against metal can result in shattering. Control the attraction moment – a neodymium left loose becomes dangerous. Striking energy can cause material chips or dangerous crushing to skin. Be sure to control the product during installation so it doesn't hit violently against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Use safety goggles when playing with powerful specimens.

Table 9: Corrosion resistance
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)

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: 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)

Flux value emitted by the magnet pole. Key data in coil applications as well as sensors. The P_c coefficient determines 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: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

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

1. Wall mount (shear)

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

2. Efficiency vs thickness

*Thin steel (e.g. computer case) drastically limits the holding force.

3. Temperature resistance

*For standard magnets, 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.

Technical and environmental data

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%

Environmental data

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

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The ring-shaped magnet MP 25x8x5 / N38 is created for mechanical fastening, where glue might fail or be insufficient. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This 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 flexible washer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. 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.

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. 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 key parameter here is the holding force amounting to approximately 7.16 kg (force ~70.21 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 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.

Advantages as well as disadvantages of neodymium magnets.

Strengths

Apart from their strong magnetic energy, neodymium magnets have these key benefits:

They retain magnetic properties for almost 10 years – the loss is just ~1% (in theory),
They possess excellent resistance to weakening of magnetic properties due to opposing magnetic fields,
Thanks to the elegant finish, the plating of Ni-Cu-Ni, gold-plated, or silver gives an aesthetic appearance,
They are known for high magnetic induction at the operating surface, which increases their power,
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 customize to unusual requirements,
Significant place in modern industrial fields – they are used in computer drives, brushless drives, precision medical tools, as well as multitasking production systems.
Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Disadvantages

Disadvantages of NdFeB magnets:

At strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
Limited possibility of producing threads in the magnet and complex shapes - preferred is casing - mounting mechanism.
Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Additionally, small elements of these products can disrupt the diagnostic process medical when they are in the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Magnet power was defined for optimal configuration, assuming:

on a plate made of structural steel, perfectly concentrating the magnetic field
whose thickness is min. 10 mm
with an ideally smooth touching surface
with direct contact (without paint)
under perpendicular application of breakaway force (90-degree angle)
at temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

In real-world applications, the actual holding force depends on many variables, presented from the most important:

Distance (between the magnet and the plate), because even a microscopic clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Steel thickness – insufficiently thick sheet does not close the flux, causing part of the flux to be escaped into the air.
Material type – ideal substrate is pure iron steel. Hardened steels may attract less.
Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate lowers the load capacity.

H&S for magnets

Health Danger

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Keep away from children

Always store magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are life-threatening.

Allergy Warning

It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, prevent touching magnets with bare hands and select encased magnets.

Keep away from computers

Data protection: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, medical aids, mechanical watches).

Protective goggles

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Keep away from electronics

GPS units and smartphones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Power loss in heat

Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. The loss of strength is permanent.

Machining danger

Drilling and cutting of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Immense force

Use magnets consciously. Their immense force can surprise even experienced users. Plan your moves and respect their power.

Physical harm

Risk of injury: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.

Caution! Need more info? Check our post: Are neodymium magnets dangerous?

MP 25x8x5 / N38 - ring magnet

Technical details - MP 25x8x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the product - technical parameters

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

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

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

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

Table 5: Thermal resistance (stability) - thermal limit MP 25x8x5 / N38

Table 6: Two magnets (attraction) - field range MP 25x8x5 / N38

Table 7: Protective zones (electronics) - warnings MP 25x8x5 / N38

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

Table 9: Corrosion resistance MP 25x8x5 / N38

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

Table 11: Submerged application MP 25x8x5 / N38

1. Wall mount (shear)

2. Efficiency vs thickness

3. Temperature resistance

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

Chemical composition

Environmental data

Magnet pull force

Field Strength

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Advantages as well as disadvantages of neodymium magnets.

Strengths

Disadvantages

Lifting parameters

Maximum lifting force for a neodymium magnet – what it depends on?

Determinants of lifting force in real conditions

H&S for magnets

Health Danger

Keep away from children

Allergy Warning

Keep away from computers

Protective goggles

Keep away from electronics

Power loss in heat

Machining danger

Immense force

Physical harm

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

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

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

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

Table 5: Thermal resistance (stability) - thermal limit
MP 25x8x5 / N38

Table 6: Two magnets (attraction) - field range
MP 25x8x5 / N38

Table 7: Protective zones (electronics) - warnings
MP 25x8x5 / N38

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

Table 9: Corrosion resistance
MP 25x8x5 / N38

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

Table 11: Submerged application
MP 25x8x5 / N38