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MP 25x8x20 / 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 030450

GTIN/EAN: 5906301812340

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

8 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

66.09 g

Magnetization Direction

↑ axial

Load capacity

19.02 kg / 186.54 N

Magnetic Induction

525.50 mT / 5255 Gs

Coating

[NiCuNi] Nickel

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41.71 ZŁ with VAT / pcs + price for transport

33.91 ZŁ net + 23% VAT / pcs

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Technical of the product - MP 25x8x20 / N38 - ring magnet

Specification / characteristics - MP 25x8x20 / N38 - ring magnet

properties

properties	values
Cat. no.	030450
GTIN/EAN	5906301812340
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	20 mm [±0,1 mm]
Weight	66.09 g
Magnetization Direction	↑ axial
Load capacity ~ ?	19.02 kg / 186.54 N
Magnetic Induction ~ ?	525.50 mT / 5255 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x8x20 / 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

Physical modeling of the assembly - data

Presented data represent the direct effect of a engineering analysis. Values were calculated on algorithms for the class Nd₂Fe₁₄B. Operational parameters might slightly differ. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static pull force (pull vs distance) - interaction chart
MP 25x8x20 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N	critical level
1 mm	5310 Gs 531.0 mT	16.07 kg / 35.42 pounds 16067.7 g / 157.6 N	critical level
2 mm	4846 Gs 484.6 mT	13.38 kg / 29.50 pounds 13380.1 g / 131.3 N	critical level
3 mm	4397 Gs 439.7 mT	11.02 kg / 24.29 pounds 11019.3 g / 108.1 N	critical level
5 mm	3576 Gs 357.6 mT	7.29 kg / 16.07 pounds 7287.1 g / 71.5 N	strong
10 mm	2073 Gs 207.3 mT	2.45 kg / 5.40 pounds 2448.1 g / 24.0 N	strong
15 mm	1231 Gs 123.1 mT	0.86 kg / 1.90 pounds 863.8 g / 8.5 N	weak grip
20 mm	773 Gs 77.3 mT	0.34 kg / 0.75 pounds 340.1 g / 3.3 N	weak grip
30 mm	356 Gs 35.6 mT	0.07 kg / 0.16 pounds 72.1 g / 0.7 N	weak grip
50 mm	115 Gs 11.5 mT	0.01 kg / 0.02 pounds 7.5 g / 0.1 N	weak grip

Pulling power drops sharply with every subsequent millimeter of gap. Remember that even a microscopic distance (e.g., dirt, varnish, veneer) strongly weakens the grip. Magnets work optimally at the point of direct contact; air break drastically cuts the force. Observe how rapidly the load capacity fall, when the magnet does not touch flatly to the metal substrate. When planning the assembly, eliminate redundant distances.

Table 2: Sliding hold (vertical surface)
MP 25x8x20 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	3.80 kg / 8.39 pounds 3804.0 g / 37.3 N
1 mm	Stal (~0.2)	3.21 kg / 7.09 pounds 3214.0 g / 31.5 N
2 mm	Stal (~0.2)	2.68 kg / 5.90 pounds 2676.0 g / 26.3 N
3 mm	Stal (~0.2)	2.20 kg / 4.86 pounds 2204.0 g / 21.6 N
5 mm	Stal (~0.2)	1.46 kg / 3.21 pounds 1458.0 g / 14.3 N
10 mm	Stal (~0.2)	0.49 kg / 1.08 pounds 490.0 g / 4.8 N
15 mm	Stal (~0.2)	0.17 kg / 0.38 pounds 172.0 g / 1.7 N
20 mm	Stal (~0.2)	0.07 kg / 0.15 pounds 68.0 g / 0.7 N
30 mm	Stal (~0.2)	0.01 kg / 0.03 pounds 14.0 g / 0.1 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N

This section indicates the approximate weight limit needed to start the slippage of the magnet down against a upright steel wall (assuming typical friction coefficient). The holding force is a function of the gap size between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x8x20 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.71 kg / 12.58 pounds 5706.0 g / 56.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.80 kg / 8.39 pounds 3804.0 g / 37.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.90 kg / 4.19 pounds 1902.0 g / 18.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	9.51 kg / 20.97 pounds 9510.0 g / 93.3 N

When hanging a holder on a upright wall (e.g., a car body), it will maintain just about 20%-30% of its maximum pull force. Gravitational force as well as a weak degree of grip mean that holders slip faster than they pull off. Designing a vertical fastening? Consider that the shear force is noticeably lower than the perpendicular breakaway force. On a painted metal, the element will give way down under a noticeably lighter cargo. Application of an anti-slip layer can effectively improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x8x20 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.95 kg / 2.10 pounds 951.0 g / 9.3 N
1 mm	13%	2.38 kg / 5.24 pounds 2377.5 g / 23.3 N
2 mm	25%	4.76 kg / 10.48 pounds 4755.0 g / 46.6 N
3 mm	38%	7.13 kg / 15.72 pounds 7132.5 g / 70.0 N
5 mm	63%	11.89 kg / 26.21 pounds 11887.5 g / 116.6 N
10 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N
11 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N
12 mm	100%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N

A too thin steel is unable to take in the entire magnetic field, which wastes potential of the magnet. If you attach a powerful product to a too thin substrate, the flux will pass right through and the attraction force will be weaker. To squeeze 100% of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation phenomenon means that on sheet metal structures (e.g., appliance housings), the product shows lower pull force. We recommend selecting the steel cross-section based on the following data.

Table 5: Thermal stability (material behavior) - thermal limit
MP 25x8x20 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	19.02 kg / 41.93 pounds 19020.0 g / 186.6 N	OK
40 °C	-2.2%	18.60 kg / 41.01 pounds 18601.6 g / 182.5 N	OK
60 °C	-4.4%	18.18 kg / 40.09 pounds 18183.1 g / 178.4 N	OK
80 °C	-6.6%	17.76 kg / 39.16 pounds 17764.7 g / 174.3 N
100 °C	-28.8%	13.54 kg / 29.86 pounds 13542.2 g / 132.8 N

Ordinary NdFeB products lose power past the thermal threshold. Avoid high temperatures – high temperature can irreversibly destroy this magnet. With every degree above norm, the neodymium's power momentarily drops. Do not use this magnet close to ovens exceeding its operating temperature limit. Ignoring the limit will result in irreversible degradation of magnetic properties.

*Technical advisory: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) are more susceptible to demagnetization at lower temperatures compared to rod magnets. Red status in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - forces in the system
MP 25x8x20 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	30.91 kg / 68.14 pounds 6 082 Gs	4.64 kg / 10.22 pounds 4636 g / 45.5 N	N/A
1 mm	28.48 kg / 62.79 pounds 11 091 Gs	4.27 kg / 9.42 pounds 4272 g / 41.9 N	25.63 kg / 56.51 pounds ~0 Gs
2 mm	26.11 kg / 57.57 pounds 10 620 Gs	3.92 kg / 8.63 pounds 3917 g / 38.4 N	23.50 kg / 51.81 pounds ~0 Gs
3 mm	23.86 kg / 52.61 pounds 10 153 Gs	3.58 kg / 7.89 pounds 3580 g / 35.1 N	21.48 kg / 47.35 pounds ~0 Gs
5 mm	19.76 kg / 43.56 pounds 9 238 Gs	2.96 kg / 6.53 pounds 2964 g / 29.1 N	17.78 kg / 39.20 pounds ~0 Gs
10 mm	11.84 kg / 26.11 pounds 7 152 Gs	1.78 kg / 3.92 pounds 1776 g / 17.4 N	10.66 kg / 23.50 pounds ~0 Gs
20 mm	3.98 kg / 8.77 pounds 4 145 Gs	0.60 kg / 1.32 pounds 597 g / 5.9 N	3.58 kg / 7.89 pounds ~0 Gs
50 mm	0.24 kg / 0.54 pounds 1 024 Gs	0.04 kg / 0.08 pounds 36 g / 0.4 N	0.22 kg / 0.48 pounds ~0 Gs
60 mm	0.12 kg / 0.26 pounds 712 Gs	0.02 kg / 0.04 pounds 18 g / 0.2 N	0.11 kg / 0.23 pounds ~0 Gs
70 mm	0.06 kg / 0.13 pounds 514 Gs	0.01 kg / 0.02 pounds 9 g / 0.1 N	0.06 kg / 0.12 pounds ~0 Gs
80 mm	0.03 kg / 0.07 pounds 383 Gs	0.01 kg / 0.01 pounds 5 g / 0.1 N	0.03 kg / 0.07 pounds ~0 Gs
90 mm	0.02 kg / 0.04 pounds 293 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
100 mm	0.01 kg / 0.03 pounds 230 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs

Two magnetic products interact from a significantly greater distance than a neodymium and metal setup. The connection of magnet-to-magnet creates a more powerful interaction and a larger range of action. Planning to create a powerful holder? Use a pair of magnets instead of a neodymium and a steel. Remember that when bringing together two magnets, the pinch force is extreme. The levitation is a bit weaker than the attraction, but still impressive.
*The magnetic induction in repulsion mode is approximately ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Attention: Calculations show shear force of dual identical magnets (friction coefficient ~0.15 for Ni-Ni coating).

Table 7: Hazards (implants) - warnings
MP 25x8x20 / 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

Extremely neodym field is a real danger to electronic devices as well as medical implants. These neodymiums produce a field that destroys function of sensitive medical devices. Be aware: the unseen radiation passes through tissues and housings. Special caution must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, remotes, speakers, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MP 25x8x20 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	18.43 km/h (5.12 m/s)	0.87 J
30 mm	29.70 km/h (8.25 m/s)	2.25 J
50 mm	38.27 km/h (10.63 m/s)	3.73 J
100 mm	54.10 km/h (15.03 m/s)	7.46 J

NdFeB products are prone to chipping – 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 dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't hit with great force against the steel surface. A collision at high speed almost guarantees destruction of the magnet. Use safety goggles when handling with powerful specimens.

Table 9: Coating parameters (durability)
MP 25x8x20 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MP 25x8x20 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	10 108 Mx	101.1 µWb
P_c Coefficient	1.25	High (Stable)

Flux value passing through the magnet pole. Essential parameter in coil applications and motors. P_c value defines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 25x8x20 / N38

Environment	Effective steel pull	Effect
Air (land)	19.02 kg	Standard
Water (riverbed)	21.78 kg (+2.76 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. Buoyancy helps in lifting finds.

1. Vertical hold

*Caution: On a vertical surface, the magnet retains just approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Temperature resistance

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.25

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 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%

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: 030450-2026

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The ring-shaped magnet MP 25x8x20 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. 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.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 8 mm fits this model. 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 20 mm. The key parameter here is the lifting capacity amounting to approximately 19.02 kg (force ~186.54 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.

Strengths and weaknesses of rare earth magnets.

Strengths

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

They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
Neodymium magnets are characterized by exceptionally resistant to loss of magnetic properties caused by external field sources,
In other words, due to the metallic finish of silver, the element looks attractive,
They show high magnetic induction at the operating surface, making them more effective,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to the option of precise shaping and customization to individualized projects, NdFeB magnets can be created in a wide range of geometric configurations, which expands the range of possible applications,
Significant place in modern industrial fields – they serve a role in hard drives, electromotive mechanisms, precision medical tools, also other advanced devices.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Characteristics of disadvantages of neodymium magnets and ways of using them

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Due to limitations in producing threads and complicated shapes in magnets, we recommend using cover - magnetic holder.
Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can complicate diagnosis medical after entering the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what affects it?

The specified lifting capacity represents the peak performance, measured under laboratory conditions, specifically:

using a plate made of low-carbon steel, functioning as a ideal flux conductor
possessing a massiveness of minimum 10 mm to avoid saturation
characterized by even structure
without any clearance between the magnet and steel
during pulling in a direction vertical to the plane
in temp. approx. 20°C

What influences lifting capacity in practice

It is worth knowing that the application force may be lower influenced by elements below, starting with the most relevant:

Gap between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of nominal force).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
Chemical composition of the base – low-carbon steel attracts best. Higher carbon content lower magnetic properties and holding force.
Base smoothness – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity was measured with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate lowers the load capacity.

H&S for magnets

Machining danger

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Implant safety

Warning for patients: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or request help to handle the magnets.

Threat to navigation

Remember: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your mobile, tablet, and GPS.

Threat to electronics

Powerful magnetic fields can erase data on credit cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.

Heat warning

Monitor thermal conditions. Heating the magnet to high heat will permanently weaken its properties and strength.

Immense force

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Sensitization to coating

A percentage of the population have a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling may cause an allergic reaction. We strongly advise use safety gloves.

No play value

Strictly store magnets out of reach of children. Ingestion danger is high, and the effects of magnets clamping inside the body are very dangerous.

Pinching danger

Large magnets can break fingers instantly. Under no circumstances put your hand between two attracting surfaces.

Protective goggles

Neodymium magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them breaking into small pieces.

Important! Details about risks in the article: Magnet Safety Guide.

MP 25x8x20 / N38 - ring magnet

Technical of the product - MP 25x8x20 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - data

Table 1: Static pull force (pull vs distance) - interaction chart MP 25x8x20 / N38

Table 2: Sliding hold (vertical surface) MP 25x8x20 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MP 25x8x20 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MP 25x8x20 / N38

Table 5: Thermal stability (material behavior) - thermal limit MP 25x8x20 / N38

Table 6: Two magnets (attraction) - forces in the system MP 25x8x20 / N38

Table 7: Hazards (implants) - warnings MP 25x8x20 / N38

Table 8: Collisions (cracking risk) - collision effects MP 25x8x20 / N38

Table 9: Coating parameters (durability) MP 25x8x20 / N38

Table 10: Electrical data (Pc) MP 25x8x20 / N38

Table 11: Hydrostatics and buoyancy MP 25x8x20 / N38

1. Vertical hold

2. Steel saturation

3. Temperature resistance

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

Elemental analysis

Environmental data

Force (pull)

Magnetic Field

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Strengths and weaknesses of rare earth magnets.

Strengths

Limitations

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what affects it?

What influences lifting capacity in practice

H&S for magnets

Machining danger

Implant safety

Threat to navigation

Threat to electronics

Heat warning

Immense force

Sensitization to coating

No play value

Pinching danger

Protective goggles

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - interaction chart
MP 25x8x20 / N38

Table 2: Sliding hold (vertical surface)
MP 25x8x20 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 25x8x20 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x8x20 / N38

Table 5: Thermal stability (material behavior) - thermal limit
MP 25x8x20 / N38

Table 6: Two magnets (attraction) - forces in the system
MP 25x8x20 / N38

Table 7: Hazards (implants) - warnings
MP 25x8x20 / N38

Table 8: Collisions (cracking risk) - collision effects
MP 25x8x20 / N38

Table 9: Coating parameters (durability)
MP 25x8x20 / N38

Table 10: Electrical data (P_c)
MP 25x8x20 / N38

Table 11: Hydrostatics and buoyancy
MP 25x8x20 / N38