Product available Ships today (order by 14:00)

MP 25x5x5 / N38 - ring magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, mazowieckie, 05-850, PL
Telephone: +48 22 499 98 98
Price range: 1-6500 PLN
Rating: 5

ring magnet

Catalog no 030193

GTIN/EAN: 5906301812104

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

17.67 g

Magnetization Direction

↑ axial

Load capacity

7.66 kg / 75.12 N

Magnetic Induction

230.20 mT / 2302 Gs

Coating

[NiCuNi] Nickel

technical details »

6.00 ZŁ with VAT / pcs + price for transport

4.88 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

4.88 ZŁ

6.00 ZŁ

price from 150 pcs

4.59 ZŁ

5.64 ZŁ

price from 550 pcs

4.29 ZŁ

5.28 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Looking for a better price?

Contact us by phone +48 888 99 98 98 or let us know via request form our website.
Specifications and form of magnetic components can be checked using our force calculator.

Orders submitted before 14:00 will be dispatched today!

Technical details - MP 25x5x5 / N38 - ring magnet

Specification / characteristics - MP 25x5x5 / N38 - ring magnet

properties

properties	values
Cat. no.	030193
GTIN/EAN	5906301812104
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	5 mm [±0,1 mm]
Height	5 mm [±0,1 mm]
Weight	17.67 g
Magnetization Direction	↑ axial
Load capacity ~ ?	7.66 kg / 75.12 N
Magnetic Induction ~ ?	230.20 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x5x5 / 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 - technical parameters

Presented values are the result of a physical simulation. Results rely on models for the class Nd₂Fe₁₄B. Real-world conditions may deviate from the simulation results. Use these calculations as a supplementary guide during assembly planning.

Table 1: Static force (pull vs distance) - power drop
MP 25x5x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5777 Gs 577.7 mT	7.66 kg / 16.89 LBS 7660.0 g / 75.1 N	warning
1 mm	5310 Gs 531.0 mT	6.47 kg / 14.27 LBS 6471.0 g / 63.5 N	warning
2 mm	4846 Gs 484.6 mT	5.39 kg / 11.88 LBS 5388.6 g / 52.9 N	warning
3 mm	4397 Gs 439.7 mT	4.44 kg / 9.78 LBS 4437.9 g / 43.5 N	warning
5 mm	3576 Gs 357.6 mT	2.93 kg / 6.47 LBS 2934.8 g / 28.8 N	warning
10 mm	2073 Gs 207.3 mT	0.99 kg / 2.17 LBS 985.9 g / 9.7 N	weak grip
15 mm	1231 Gs 123.1 mT	0.35 kg / 0.77 LBS 347.9 g / 3.4 N	weak grip
20 mm	773 Gs 77.3 mT	0.14 kg / 0.30 LBS 137.0 g / 1.3 N	weak grip
30 mm	356 Gs 35.6 mT	0.03 kg / 0.06 LBS 29.0 g / 0.3 N	weak grip
50 mm	115 Gs 11.5 mT	0.00 kg / 0.01 LBS 3.0 g / 0.0 N	weak grip

Pulling power weakens significantly with every mm of gap. Remember that even a very thin break (e.g., dirt, varnish, dust) noticeably diminishes the holding power. Neodymiums hold most effectively at the point of direct contact; distance kills the power. See how rapidly the load capacity fall, when the magnet does not touch flatly to the metal substrate. When planning the mounting, discard additional spacers.

Table 2: Shear hold (vertical surface)
MP 25x5x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	1.53 kg / 3.38 LBS 1532.0 g / 15.0 N
1 mm	Stal (~0.2)	1.29 kg / 2.85 LBS 1294.0 g / 12.7 N
2 mm	Stal (~0.2)	1.08 kg / 2.38 LBS 1078.0 g / 10.6 N
3 mm	Stal (~0.2)	0.89 kg / 1.96 LBS 888.0 g / 8.7 N
5 mm	Stal (~0.2)	0.59 kg / 1.29 LBS 586.0 g / 5.7 N
10 mm	Stal (~0.2)	0.20 kg / 0.44 LBS 198.0 g / 1.9 N
15 mm	Stal (~0.2)	0.07 kg / 0.15 LBS 70.0 g / 0.7 N
20 mm	Stal (~0.2)	0.03 kg / 0.06 LBS 28.0 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 required to start the shifting of the magnet down on a vertical steel plate (considering typical friction coefficient). The holding force is a function of the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 25x5x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	2.30 kg / 5.07 LBS 2298.0 g / 22.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	1.53 kg / 3.38 LBS 1532.0 g / 15.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.77 kg / 1.69 LBS 766.0 g / 7.5 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	3.83 kg / 8.44 LBS 3830.0 g / 37.6 N

When mounting a element on a vertical plane (e.g., a fridge), it you can count on only approx. 20%-30% of its nominal power. Gravitational force as well as a low friction coefficient influence the fact that magnets slip easier than they pop off the substrate. Want to create a vertical fastening? Remember that the sliding force is significantly lower than the maximum static pull force. On a painted metal, the element will slip down under a significantly smaller cargo. Application of an anti-slip layer can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 25x5x5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.77 kg / 1.69 LBS 766.0 g / 7.5 N
1 mm	25%	1.92 kg / 4.22 LBS 1915.0 g / 18.8 N
2 mm	50%	3.83 kg / 8.44 LBS 3830.0 g / 37.6 N
3 mm	75%	5.75 kg / 12.67 LBS 5745.0 g / 56.4 N
5 mm	100%	7.66 kg / 16.89 LBS 7660.0 g / 75.1 N
10 mm	100%	7.66 kg / 16.89 LBS 7660.0 g / 75.1 N
11 mm	100%	7.66 kg / 16.89 LBS 7660.0 g / 75.1 N
12 mm	100%	7.66 kg / 16.89 LBS 7660.0 g / 75.1 N

A too thin steel is not enough to focus the full magnetic flux, which squanders power of the magnet. If you mount a strong magnet to a thin surface, the field will penetrate right through and the pull force will drop sharply. To achieve full efficiency of this magnet's power, you require a sufficiently solid element of steel. The material oversaturation means that on thin elements (e.g., appliance housings), the holder shows lower pull force. We advise picking the steel dimension from these parameters.

Table 5: Thermal stability (material behavior) - power drop
MP 25x5x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	7.66 kg / 16.89 LBS 7660.0 g / 75.1 N	OK
40 °C	-2.2%	7.49 kg / 16.52 LBS 7491.5 g / 73.5 N	OK
60 °C	-4.4%	7.32 kg / 16.14 LBS 7323.0 g / 71.8 N	OK
80 °C	-6.6%	7.15 kg / 15.77 LBS 7154.4 g / 70.2 N
100 °C	-28.8%	5.45 kg / 12.02 LBS 5453.9 g / 53.5 N

Ordinary NdFeB products change their properties strength above the temperature limit. Avoid high temperatures – excessive heat can permanently damage this product. With every degree above norm, the magnet's capacity momentarily lowers. Refrain from using this magnet near heat sources higher than its operating temperature limit. Exceeding the critical threshold will cause irreversible degradation of magnetism.

*Important note: Temperature resistance is determined by both grade, as well as the dimension ratios. Thin magnets (low Pc) risk losing magnetic properties sooner compared to rod magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x5x5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (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 magnetic products interact 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. Designing a strong closure? Use a pair of magnets instead of one magnet and a steel. Remember that when bringing together two magnets, the pinch force is massive. The levitation is marginally weaker than the connection force, but still significant.
*Field value for N-N configuration is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).
Note: Results demonstrate friction force of two same magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MP 25x5x5 / 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
Phone / Smartphone	40 Gs (4.0 mT)	8.0 cm
Car key	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.0 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

A strong magnetic field poses a serious hazard to IT equipment as well as pacemakers. These NdFeB products produce a flux that disrupts operation of digital equipment. Notice: the unseen radiation acts through matter and plastic. Special caution must be exercised by people with hearing aids and drug dispensers. The risk also applies to: automatic timepieces, remotes, speakers, and displays. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - warning
MP 25x5x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	22.62 km/h (6.28 m/s)	0.35 J
30 mm	36.46 km/h (10.13 m/s)	0.91 J
50 mm	46.96 km/h (13.05 m/s)	1.50 J
100 mm	66.40 km/h (18.45 m/s)	3.01 J

NdFeB products are very brittle – a strong collision with metal risks their cracking. Watch the impact speed – a magnet released freely becomes dangerous. Striking energy can destroy the magnet or injury to fingers. Hold the magnet firmly during mounting so it doesn't hit violently against the metal. A collision at high speed means shattering of the magnet. Use safety goggles when handling with large magnets.

Table 9: Corrosion resistance
MP 25x5x5 / N38

Technical parameter	Value / Description
Coating type	[NiCuNi] Nickel
Layer structure	Nickel - Copper - Nickel
Layer thickness	10-20 µm
Salt spray test (SST) ?	24 h
Recommended environment	Indoors only (dry)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MP 25x5x5 / N38

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

Flux value passing through the magnet pole. Key data when building generators as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 25x5x5 / N38

Environment	Effective steel pull	Effect
Air (land)	7.66 kg	Standard
Water (riverbed)	8.77 kg (+1.11 kg buoyancy gain)	+14.5%

Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.

1. Shear force

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

2. Steel saturation

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

3. Power loss vs temp

*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) = 1.03

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 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%

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: 030193-2026

Magnet Unit Converter

Pulling force

Force (N)

Force in lbs

Field Strength

Gauss (Gs)

Insert your figure in any box, and the remaining fields convert automatically.

See more deals

Product available Ships today (order by 14:00)

RM R7 SUPER - 13000 Gs / N52 - magnetic distributor

160.00 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMGZ 60x30x15 [M10] GZ / N38 - magnetic holder external thread

102.95 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 33x10 / N38 - cylindrical magnet

26.52 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 7x2 / N38 - cylindrical magnet

0.381 ZŁ brutto / pcs

The ring magnet with a hole MP 25x5x5 / N38 is created for permanent mounting, 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. This product with a force of 7.66 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 25x5x5 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. 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. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

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.

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 7.66 kg (force ~75.12 N). The mounting hole diameter is precisely 5 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 Nd₂Fe₁₄B magnets.

Strengths

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

They do not lose strength, even after approximately 10 years – the reduction in strength is only ~1% (theoretically),
Magnets effectively defend themselves against loss of magnetization caused by external fields,
By applying a decorative coating of gold, the element presents an elegant look,
The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
Possibility of accurate shaping and adjusting to complex requirements,
Significant place in modern technologies – they are used in hard drives, electromotive mechanisms, medical devices, also complex engineering applications.
Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of neodymium magnets:

To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
Limited possibility of producing nuts in the magnet and complicated shapes - preferred is casing - magnetic holder.
Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child safety. Additionally, small components of these devices can be problematic in diagnostics medical after entering the body.
Due to complex production process, their price is higher than average,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Information about lifting capacity was defined for optimal configuration, assuming:

on a plate made of mild steel, effectively closing the magnetic flux
whose transverse dimension equals approx. 10 mm
characterized by lack of roughness
with direct contact (no paint)
under perpendicular force direction (90-degree angle)
in temp. approx. 20°C

Lifting capacity in practice – influencing factors

Bear in mind that the application force will differ depending on the following factors, in order of importance:

Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
Steel type – low-carbon steel gives the best results. Alloy admixtures reduce magnetic permeability and lifting capacity.
Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
Temperature influence – high temperature reduces pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was assessed by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Safe handling of NdFeB magnets

Machining danger

Dust generated during machining of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

GPS and phone interference

Note: neodymium magnets produce a field that interferes with precision electronics. Maintain a safe distance from your mobile, tablet, and navigation systems.

Warning for allergy sufferers

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness happens, immediately stop working with magnets and use protective gear.

Eye protection

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Permanent damage

Keep cool. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).

Product not for children

Product intended for adults. Small elements pose a choking risk, leading to intestinal necrosis. Keep away from kids and pets.

Crushing force

Mind your fingers. Two large magnets will join immediately with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Medical implants

Warning for patients: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Magnetic media

Avoid bringing magnets close to a purse, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Safe operation

Use magnets consciously. Their immense force can shock even professionals. Plan your moves and respect their force.

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

MP 25x5x5 / N38 - ring magnet

Technical details - MP 25x5x5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - technical parameters

Table 1: Static force (pull vs distance) - power drop MP 25x5x5 / N38

Table 2: Shear hold (vertical surface) MP 25x5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces MP 25x5x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 25x5x5 / N38

Table 5: Thermal stability (material behavior) - power drop MP 25x5x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MP 25x5x5 / N38

Table 7: Hazards (implants) - warnings MP 25x5x5 / N38

Table 8: Impact energy (cracking risk) - warning MP 25x5x5 / N38

Table 9: Corrosion resistance MP 25x5x5 / N38

Table 10: Electrical data (Flux) MP 25x5x5 / N38

Table 11: Hydrostatics and buoyancy MP 25x5x5 / N38

1. Shear force

2. Steel saturation

3. Power loss vs temp

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

Elemental analysis

Sustainability

Pulling force

Field Strength

See more deals

RM R7 SUPER - 13000 Gs / N52 - magnetic distributor

UMGZ 60x30x15 [M10] GZ / N38 - magnetic holder external thread

MW 33x10 / N38 - cylindrical magnet

MW 7x2 / N38 - cylindrical magnet

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Limitations

Holding force characteristics

Maximum holding power of the magnet – what affects it?

Lifting capacity in practice – influencing factors

Safe handling of NdFeB magnets

Machining danger

GPS and phone interference

Warning for allergy sufferers

Eye protection

Permanent damage

Product not for children

Crushing force

Medical implants

Magnetic media

Safe operation

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - power drop
MP 25x5x5 / N38

Table 2: Shear hold (vertical surface)
MP 25x5x5 / N38

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
MP 25x5x5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 25x5x5 / N38

Table 5: Thermal stability (material behavior) - power drop
MP 25x5x5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 25x5x5 / N38

Table 7: Hazards (implants) - warnings
MP 25x5x5 / N38

Table 8: Impact energy (cracking risk) - warning
MP 25x5x5 / N38

Table 9: Corrosion resistance
MP 25x5x5 / N38

Table 10: Electrical data (Flux)
MP 25x5x5 / N38

Table 11: Hydrostatics and buoyancy
MP 25x5x5 / N38

Strengths and weaknesses of Nd₂Fe₁₄B magnets.