Product on order Ships in 3-5 days

MP 25x5x27 / 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 030192

GTIN/EAN: 5906301812098

5.00

Diameter

25 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

27 mm [±0,1 mm]

Weight

95.43 g

Magnetization Direction

↑ axial

Load capacity

18.51 kg / 181.54 N

Magnetic Induction

562.34 mT / 5623 Gs

Coating

[NiCuNi] Nickel

view specifications »

47.18 ZŁ with VAT / pcs + price for transport

38.36 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

38.36 ZŁ

47.18 ZŁ

price from 20 pcs

36.06 ZŁ

44.35 ZŁ

price from 70 pcs

33.76 ZŁ

41.52 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to negotiate?

Pick up the phone and ask +48 22 499 98 98 otherwise let us know through inquiry form the contact section.
Weight as well as form of magnetic components can be analyzed with our force calculator.

Orders submitted before 14:00 will be dispatched today!

Physical properties - MP 25x5x27 / N38 - ring magnet

Specification / characteristics - MP 25x5x27 / N38 - ring magnet

properties

properties	values
Cat. no.	030192
GTIN/EAN	5906301812098
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	27 mm [±0,1 mm]
Weight	95.43 g
Magnetization Direction	↑ axial
Load capacity ~ ?	18.51 kg / 181.54 N
Magnetic Induction ~ ?	562.34 mT / 5623 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 25x5x27 / 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

The following values constitute the result of a physical analysis. Values rely on models for the class Nd₂Fe₁₄B. Operational parameters might slightly deviate from the simulation results. Treat these data as a reference point for designers.

Table 1: Static pull force (pull vs distance) - characteristics
MP 25x5x27 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5716 Gs 571.6 mT	18.51 kg / 40.81 pounds 18510.0 g / 181.6 N	critical level
1 mm	5288 Gs 528.8 mT	15.84 kg / 34.92 pounds 15839.8 g / 155.4 N	critical level
2 mm	4861 Gs 486.1 mT	13.38 kg / 29.51 pounds 13384.0 g / 131.3 N	critical level
3 mm	4446 Gs 444.6 mT	11.20 kg / 24.69 pounds 11198.0 g / 109.9 N	critical level
5 mm	3677 Gs 367.7 mT	7.66 kg / 16.88 pounds 7657.5 g / 75.1 N	strong
10 mm	2216 Gs 221.6 mT	2.78 kg / 6.13 pounds 2782.1 g / 27.3 N	strong
15 mm	1354 Gs 135.4 mT	1.04 kg / 2.29 pounds 1037.8 g / 10.2 N	safe
20 mm	864 Gs 86.4 mT	0.42 kg / 0.93 pounds 423.3 g / 4.2 N	safe
30 mm	405 Gs 40.5 mT	0.09 kg / 0.21 pounds 93.1 g / 0.9 N	safe
50 mm	133 Gs 13.3 mT	0.01 kg / 0.02 pounds 10.0 g / 0.1 N	safe

Pulling power drops sharply with every subsequent millimeter of spacing. Note that even a microscopic distance (e.g., dirt, varnish, veneer) strongly weakens the grip. Magnets work strongest at the point of direct contact; distance kills the power. See how rapidly the load capacity drop, when the product does not adhere flatly to the steel surface. When calculating the assembly, discard redundant distances.

Table 2: Shear load (wall)
MP 25x5x27 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	3.70 kg / 8.16 pounds 3702.0 g / 36.3 N
1 mm	Stal (~0.2)	3.17 kg / 6.98 pounds 3168.0 g / 31.1 N
2 mm	Stal (~0.2)	2.68 kg / 5.90 pounds 2676.0 g / 26.3 N
3 mm	Stal (~0.2)	2.24 kg / 4.94 pounds 2240.0 g / 22.0 N
5 mm	Stal (~0.2)	1.53 kg / 3.38 pounds 1532.0 g / 15.0 N
10 mm	Stal (~0.2)	0.56 kg / 1.23 pounds 556.0 g / 5.5 N
15 mm	Stal (~0.2)	0.21 kg / 0.46 pounds 208.0 g / 2.0 N
20 mm	Stal (~0.2)	0.08 kg / 0.19 pounds 84.0 g / 0.8 N
30 mm	Stal (~0.2)	0.02 kg / 0.04 pounds 18.0 g / 0.2 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N

The following data defines the estimated shear load required to start the sliding of the magnet vertically along a upright steel plate (considering standard friction). The holding force varies with the gap size between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MP 25x5x27 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.55 kg / 12.24 pounds 5553.0 g / 54.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.70 kg / 8.16 pounds 3702.0 g / 36.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.85 kg / 4.08 pounds 1851.0 g / 18.2 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	9.26 kg / 20.40 pounds 9255.0 g / 90.8 N

When placing a element on a upright surface (e.g., a fridge), it will maintain only about 1/5 of nominal attraction strength. Gravity as well as a low friction coefficient mean that products slide down easier than they detach. Designing a wall mount? Note that the sliding force is significantly lower than the maximum static pull force. On a painted metal, the element will slide down under a noticeably lighter weight. Utilizing a rubberized pad can drastically raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x5x27 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	0.93 kg / 2.04 pounds 925.5 g / 9.1 N
1 mm	13%	2.31 kg / 5.10 pounds 2313.8 g / 22.7 N
2 mm	25%	4.63 kg / 10.20 pounds 4627.5 g / 45.4 N
3 mm	38%	6.94 kg / 15.30 pounds 6941.3 g / 68.1 N
5 mm	63%	11.57 kg / 25.50 pounds 11568.8 g / 113.5 N
10 mm	100%	18.51 kg / 40.81 pounds 18510.0 g / 181.6 N
11 mm	100%	18.51 kg / 40.81 pounds 18510.0 g / 181.6 N
12 mm	100%	18.51 kg / 40.81 pounds 18510.0 g / 181.6 N

A thin metal plate is unable to absorb the entire magnetic field, which wastes potential of the holder. If you mount a strong magnet to a thin surface, the magnetism will penetrate right through and the holding will be smaller. To squeeze full efficiency of this magnet's power, you require a sufficiently solid backing of metal. The material oversaturation means that on thin elements (e.g., appliance housings), the holder works worse. We suggest choosing the steel cross-section according to the table below.

Table 5: Working in heat (stability) - power drop
MP 25x5x27 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	18.51 kg / 40.81 pounds 18510.0 g / 181.6 N	OK
40 °C	-2.2%	18.10 kg / 39.91 pounds 18102.8 g / 177.6 N	OK
60 °C	-4.4%	17.70 kg / 39.01 pounds 17695.6 g / 173.6 N	OK
80 °C	-6.6%	17.29 kg / 38.11 pounds 17288.3 g / 169.6 N
100 °C	-28.8%	13.18 kg / 29.05 pounds 13179.1 g / 129.3 N

Ordinary NdFeB products change their properties parameters after exceeding the maximum temperature. Protect against heat – heat can irreversibly demagnetize this magnet. As the temperature rises, the magnet's capacity momentarily decreases. Refrain from using this product close to ovens exceeding its safe range. Exceeding the critical threshold will result in destruction of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low Pc) may lose charge permanently sooner than taller cylinders. Red status in the table signals a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 25x5x27 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	13.99 kg / 30.83 pounds 6 064 Gs	2.10 kg / 4.62 pounds 2098 g / 20.6 N	N/A
1 mm	12.97 kg / 28.59 pounds 11 008 Gs	1.94 kg / 4.29 pounds 1945 g / 19.1 N	11.67 kg / 25.73 pounds ~0 Gs
2 mm	11.97 kg / 26.39 pounds 10 576 Gs	1.80 kg / 3.96 pounds 1795 g / 17.6 N	10.77 kg / 23.75 pounds ~0 Gs
3 mm	11.02 kg / 24.29 pounds 10 146 Gs	1.65 kg / 3.64 pounds 1652 g / 16.2 N	9.91 kg / 21.86 pounds ~0 Gs
5 mm	9.26 kg / 20.42 pounds 9 303 Gs	1.39 kg / 3.06 pounds 1389 g / 13.6 N	8.33 kg / 18.37 pounds ~0 Gs
10 mm	5.79 kg / 12.76 pounds 7 353 Gs	0.87 kg / 1.91 pounds 868 g / 8.5 N	5.21 kg / 11.48 pounds ~0 Gs
20 mm	2.10 kg / 4.63 pounds 4 432 Gs	0.32 kg / 0.70 pounds 315 g / 3.1 N	1.89 kg / 4.17 pounds ~0 Gs
50 mm	0.14 kg / 0.32 pounds 1 159 Gs	0.02 kg / 0.05 pounds 22 g / 0.2 N	0.13 kg / 0.29 pounds ~0 Gs
60 mm	0.07 kg / 0.16 pounds 811 Gs	0.01 kg / 0.02 pounds 11 g / 0.1 N	0.06 kg / 0.14 pounds ~0 Gs
70 mm	0.04 kg / 0.08 pounds 589 Gs	0.01 kg / 0.01 pounds 6 g / 0.1 N	0.03 kg / 0.07 pounds ~0 Gs
80 mm	0.02 kg / 0.05 pounds 440 Gs	0.00 kg / 0.01 pounds 3 g / 0.0 N	0.02 kg / 0.04 pounds ~0 Gs
90 mm	0.01 kg / 0.03 pounds 338 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs
100 mm	0.01 kg / 0.02 pounds 265 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnets attract each other from a wider radius than a magnet and steel combination. Such a system of magnet-to-magnet produces a massive flux and a wider radius of action. Want to build a powerful holder? Apply two magnets instead of a neodymium and a steel. Exercise caution that when bringing together two magnets, the collision energy is huge. The levitation is a bit weaker than the attraction, but still impressive.
*Flux density between like poles is approximately ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
* Calculations show sliding force of two same magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Safety (HSE) (implants) - precautionary measures
MP 25x5x27 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	18.0 cm
Hearing aid	10 Gs (1.0 mT)	14.0 cm
Timepiece	20 Gs (2.0 mT)	11.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	8.5 cm
Remote	50 Gs (5.0 mT)	7.5 cm
Payment card	400 Gs (40.0 mT)	3.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.5 cm

Powerful magnet radiation poses a real danger to IT equipment and pacemakers. These neodymiums generate a field that prevents correct functioning of digital equipment. Notice: the invisible magnetic field penetrates the body and housings. Special caution must be taken by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, car keys, membranes, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MP 25x5x27 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	15.31 km/h (4.25 m/s)	0.86 J
30 mm	24.40 km/h (6.78 m/s)	2.19 J
50 mm	31.42 km/h (8.73 m/s)	3.63 J
100 mm	44.42 km/h (12.34 m/s)	7.26 J

NdFeB products are very brittle – a strong collision with metal can result in shattering. Watch the impact speed – a magnet released freely turns into a projectile. Impact energy can destroy the magnet or dangerous crushing to skin. Always hold the magnet during installation so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the magnet. Use safety goggles when playing with large magnets.

Table 9: Corrosion resistance
MP 25x5x27 / 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 (P_c)
MP 25x5x27 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	4 917 Mx	49.2 µWb
P_c Coefficient	1.40	High (Stable)

Flux value passing through the pole surface. Essential parameter when building generators and motors. P_c value determines the working geometry.

Table 11: Hydrostatics and buoyancy
MP 25x5x27 / N38

Environment	Effective steel pull	Effect
Air (land)	18.51 kg	Standard
Water (riverbed)	21.19 kg (+2.68 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.

In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Caution: On a vertical wall, the magnet holds merely a fraction of its nominal pull.

2. Steel saturation

*Thin steel (e.g. 0.5mm PC case) severely reduces the holding force.

3. Power loss vs temp

*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) = 1.40

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 specification and ecology

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%

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: 030192-2026

Measurement Calculator

Magnet pull force

Newtons (N)

Force in lbs

Magnetic Field

Gauss (Gs)

Tesla (T)

Just fill in a single box, and the calculator fill in the rest for you.

Other offers

Product on order Ships in 3-5 days

UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder

245.00 ZŁ brutto / pcs

Product on order Ships in 3-5 days

MW 10x20 / N38 - cylindrical magnet

4.92 ZŁ brutto / pcs

Product on order Ships in 3-5 days

UMGW 60x30x15 [M10] GW / N38 - magnetic holder internal thread

102.96 ZŁ brutto / pcs

Product on order Ships in 3-5 days

MPL 40x18x10 SH / N38 - lamellar magnet

36.29 ZŁ brutto / pcs

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 18.51 kg works great as a door latch, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 25x5x27 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. One turn too many can destroy the magnet, so do it slowly. 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. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 5 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.

The presented product is a ring magnet with dimensions Ø25 mm (outer diameter) and height 27 mm. The pulling force of this model is an impressive 18.51 kg, which translates to 181.54 N in newtons. The mounting hole diameter is precisely 5 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). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Benefits

Apart from their strong holding force, neodymium magnets have these key benefits:

They virtually do not lose power, because even after 10 years the performance loss is only ~1% (according to literature),
Magnets effectively protect themselves against demagnetization caused by external fields,
By using a lustrous coating of nickel, the element has an proper look,
Magnets possess very high magnetic induction on the surface,
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 precise forming as well as adjusting to complex applications,
Huge importance in high-tech industry – they are commonly used in computer drives, motor assemblies, precision medical tools, and technologically advanced constructions.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets and ways of using them

Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
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.
We suggest a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
Health risk related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small elements of these products are able to be problematic in diagnostics medical when they are in the body.
With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Magnetic strength at its maximum – what affects it?

Breakaway force was defined for optimal configuration, including:

on a plate made of structural steel, effectively closing the magnetic field
with a thickness of at least 10 mm
with an ideally smooth contact surface
under conditions of no distance (metal-to-metal)
under axial application of breakaway force (90-degree angle)
at temperature room level

Key elements affecting lifting force

It is worth knowing that the working load may be lower depending on elements below, in order of importance:

Clearance – the presence of foreign body (rust, dirt, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
Loading method – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
Material type – the best choice is pure iron steel. Hardened steels may attract less.
Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet and the plate reduces the load capacity.

H&S for magnets

Immense force

Exercise caution. Neodymium magnets attract from a distance and connect with huge force, often quicker than you can move away.

Pinching danger

Large magnets can smash fingers instantly. Under no circumstances place your hand between two attracting surfaces.

Eye protection

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Health Danger

Patients with a pacemaker have to maintain an absolute distance from magnets. The magnetic field can stop the functioning of the life-saving device.

Skin irritation risks

Certain individuals have a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact can result in dermatitis. We suggest use safety gloves.

Danger to the youngest

Adult use only. Tiny parts pose a choking risk, causing severe trauma. Keep away from kids and pets.

GPS and phone interference

Navigation devices and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Demagnetization risk

Watch the temperature. Heating the magnet to high heat will ruin its properties and pulling force.

Fire warning

Machining of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Threat to electronics

Do not bring magnets close to a wallet, laptop, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Security! Learn more about risks in the article: Magnet Safety Guide.

MP 25x5x27 / N38 - ring magnet

Physical properties - MP 25x5x27 / 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 pull force (pull vs distance) - characteristics MP 25x5x27 / N38

Table 2: Shear load (wall) MP 25x5x27 / N38

Table 3: Wall mounting (sliding) - vertical pull MP 25x5x27 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MP 25x5x27 / N38

Table 5: Working in heat (stability) - power drop MP 25x5x27 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MP 25x5x27 / N38

Table 7: Safety (HSE) (implants) - precautionary measures MP 25x5x27 / N38

Table 8: Impact energy (cracking risk) - warning MP 25x5x27 / N38

Table 9: Corrosion resistance MP 25x5x27 / N38

Table 10: Construction data (Pc) MP 25x5x27 / N38

Table 11: Hydrostatics and buoyancy MP 25x5x27 / N38

1. Vertical hold

2. Steel saturation

3. Power loss vs temp

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

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

Other offers

UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder

MW 10x20 / N38 - cylindrical magnet

UMGW 60x30x15 [M10] GW / N38 - magnetic holder internal thread

MPL 40x18x10 SH / N38 - lamellar magnet

Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

Weaknesses

Lifting parameters

Magnetic strength at its maximum – what affects it?

Key elements affecting lifting force

H&S for magnets

Immense force

Pinching danger

Eye protection

Health Danger

Skin irritation risks

Danger to the youngest

GPS and phone interference

Demagnetization risk

Fire warning

Threat to electronics

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - characteristics
MP 25x5x27 / N38

Table 2: Shear load (wall)
MP 25x5x27 / N38

Table 3: Wall mounting (sliding) - vertical pull
MP 25x5x27 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MP 25x5x27 / N38

Table 5: Working in heat (stability) - power drop
MP 25x5x27 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 25x5x27 / N38

Table 7: Safety (HSE) (implants) - precautionary measures
MP 25x5x27 / N38

Table 8: Impact energy (cracking risk) - warning
MP 25x5x27 / N38

Table 9: Corrosion resistance
MP 25x5x27 / N38

Table 10: Construction data (P_c)
MP 25x5x27 / N38

Table 11: Hydrostatics and buoyancy
MP 25x5x27 / N38

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.