Product available Ships tomorrow

MP 10x7/3.5x3 / 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 030180

GTIN/EAN: 5906301811978

5.00

Diameter

10 mm [±0,1 mm]

internal diameter Ø

7/3.5 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

1.55 g

Magnetization Direction

↑ axial

Load capacity

1.88 kg / 18.47 N

Magnetic Induction

318.70 mT / 3187 Gs

Coating

[NiCuNi] Nickel

view parameters »

0.824 ZŁ with VAT / pcs + price for transport

0.670 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

0.670 ZŁ

0.824 ZŁ

price from 680 pcs

0.603 ZŁ

0.742 ZŁ

price from 1360 pcs

0.590 ZŁ

0.725 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Looking for a better price?

Call us now +48 888 99 98 98 if you prefer drop us a message via contact form our website.
Weight and form of magnets can be checked with our online calculation tool.

Order by 14:00 and we’ll ship today!

Physical properties - MP 10x7/3.5x3 / N38 - ring magnet

Specification / characteristics - MP 10x7/3.5x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030180
GTIN/EAN	5906301811978
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	10 mm [±0,1 mm]
internal diameter Ø	7/3.5 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	1.55 g
Magnetization Direction	↑ axial
Load capacity ~ ?	1.88 kg / 18.47 N
Magnetic Induction ~ ?	318.70 mT / 3187 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 10x7/3.5x3 / 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 magnet - technical parameters

Presented information constitute the outcome of a physical calculation. Results are based on algorithms for the material Nd₂Fe₁₄B. Real-world performance might slightly differ from theoretical values. Please consider these data as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
MP 10x7/3.5x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	2813 Gs 281.3 mT	1.88 kg / 4.14 LBS 1880.0 g / 18.4 N	low risk
1 mm	2373 Gs 237.3 mT	1.34 kg / 2.95 LBS 1338.1 g / 13.1 N	low risk
2 mm	1870 Gs 187.0 mT	0.83 kg / 1.83 LBS 830.9 g / 8.2 N	low risk
3 mm	1416 Gs 141.6 mT	0.48 kg / 1.05 LBS 476.6 g / 4.7 N	low risk
5 mm	785 Gs 78.5 mT	0.15 kg / 0.32 LBS 146.4 g / 1.4 N	low risk
10 mm	214 Gs 21.4 mT	0.01 kg / 0.02 LBS 10.9 g / 0.1 N	low risk
15 mm	81 Gs 8.1 mT	0.00 kg / 0.00 LBS 1.6 g / 0.0 N	low risk
20 mm	38 Gs 3.8 mT	0.00 kg / 0.00 LBS 0.3 g / 0.0 N	low risk
30 mm	12 Gs 1.2 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	low risk
50 mm	3 Gs 0.3 mT	0.00 kg / 0.00 LBS 0.0 g / 0.0 N	low risk

Grip strength drops significantly with every mm of distance. Remember that even a microscopic distance (e.g., dirt, paint, veneer) strongly weakens the grip. Magnets work strongest during direct contact; air break weakens the force. Observe how flashily the load capacity fall, when the magnet does not adhere directly to the steel surface. When calculating the arrangement, avoid unnecessary gaps.

Table 2: Shear force (vertical surface)
MP 10x7/3.5x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.38 kg / 0.83 LBS 376.0 g / 3.7 N
1 mm	Stal (~0.2)	0.27 kg / 0.59 LBS 268.0 g / 2.6 N
2 mm	Stal (~0.2)	0.17 kg / 0.37 LBS 166.0 g / 1.6 N
3 mm	Stal (~0.2)	0.10 kg / 0.21 LBS 96.0 g / 0.9 N
5 mm	Stal (~0.2)	0.03 kg / 0.07 LBS 30.0 g / 0.3 N
10 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 2.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 LBS 0.0 g / 0.0 N

The following data calculates the approximate weight limit sufficient to initiate the shifting of the magnet vertically against a vertical metal surface (considering typical friction). This value is relative to the distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 10x7/3.5x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.56 kg / 1.24 LBS 564.0 g / 5.5 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.38 kg / 0.83 LBS 376.0 g / 3.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.19 kg / 0.41 LBS 188.0 g / 1.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.94 kg / 2.07 LBS 940.0 g / 9.2 N

When hanging a holder on a upright plane (e.g., a fridge), it will only hold just approx. 20%-30% of nominal attraction strength. Gravitational force and a weak degree of grip cause that holders slip easier than they detach. Designing a vertical fastening? Consider that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the holder will give way down under a significantly smaller load. Using a rubber layer can drastically raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 10x7/3.5x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.19 kg / 0.41 LBS 188.0 g / 1.8 N
1 mm	25%	0.47 kg / 1.04 LBS 470.0 g / 4.6 N
2 mm	50%	0.94 kg / 2.07 LBS 940.0 g / 9.2 N
3 mm	75%	1.41 kg / 3.11 LBS 1410.0 g / 13.8 N
5 mm	100%	1.88 kg / 4.14 LBS 1880.0 g / 18.4 N
10 mm	100%	1.88 kg / 4.14 LBS 1880.0 g / 18.4 N
11 mm	100%	1.88 kg / 4.14 LBS 1880.0 g / 18.4 N
12 mm	100%	1.88 kg / 4.14 LBS 1880.0 g / 18.4 N

A thin sheet cannot focus the full magnetic flux, which weakens actual performance of the magnet. Should you mount a strong magnet to a weak sheet, the magnetism will pass right through and the holding will be smaller. To squeeze 100% of this neodymium's potential, you require a sufficiently solid piece of metal. The saturation phenomenon means that on sheet metal structures (e.g., appliance housings), the magnet holds weaker. We recommend selecting the steel cross-section according to the table below.

Table 5: Thermal resistance (stability) - power drop
MP 10x7/3.5x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	1.88 kg / 4.14 LBS 1880.0 g / 18.4 N	OK
40 °C	-2.2%	1.84 kg / 4.05 LBS 1838.6 g / 18.0 N	OK
60 °C	-4.4%	1.80 kg / 3.96 LBS 1797.3 g / 17.6 N
80 °C	-6.6%	1.76 kg / 3.87 LBS 1755.9 g / 17.2 N
100 °C	-28.8%	1.34 kg / 2.95 LBS 1338.6 g / 13.1 N

Classic neodymiums change their properties strength after exceeding the maximum temperature. Watch out for overheating – high temperature can permanently damage this magnet. With every degree above norm, the magnet's power briefly drops. Avoid using this magnet in hot environments exceeding its safe range. Exceeding the critical threshold will lead to permanent loss of magnetic properties.

*Engineering note: Heat tolerance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low Pc) are more susceptible to demagnetization under lower heat stress compared to rod magnets. Red status in the table indicates a risk of irreversible loss for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 10x7/3.5x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	2.86 kg / 6.30 LBS 4 419 Gs	0.43 kg / 0.95 LBS 429 g / 4.2 N	N/A
1 mm	2.46 kg / 5.43 LBS 5 224 Gs	0.37 kg / 0.81 LBS 370 g / 3.6 N	2.22 kg / 4.89 LBS ~0 Gs
2 mm	2.03 kg / 4.49 LBS 4 747 Gs	0.31 kg / 0.67 LBS 305 g / 3.0 N	1.83 kg / 4.04 LBS ~0 Gs
3 mm	1.62 kg / 3.58 LBS 4 242 Gs	0.24 kg / 0.54 LBS 244 g / 2.4 N	1.46 kg / 3.22 LBS ~0 Gs
5 mm	0.96 kg / 2.12 LBS 3 266 Gs	0.14 kg / 0.32 LBS 144 g / 1.4 N	0.87 kg / 1.91 LBS ~0 Gs
10 mm	0.22 kg / 0.49 LBS 1 570 Gs	0.03 kg / 0.07 LBS 33 g / 0.3 N	0.20 kg / 0.44 LBS ~0 Gs
20 mm	0.02 kg / 0.04 LBS 429 Gs	0.00 kg / 0.01 LBS 2 g / 0.0 N	0.01 kg / 0.03 LBS ~0 Gs
50 mm	0.00 kg / 0.00 LBS 41 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
60 mm	0.00 kg / 0.00 LBS 25 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
70 mm	0.00 kg / 0.00 LBS 16 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
80 mm	0.00 kg / 0.00 LBS 11 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
90 mm	0.00 kg / 0.00 LBS 8 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs
100 mm	0.00 kg / 0.00 LBS 6 Gs	0.00 kg / 0.00 LBS 0 g / 0.0 N	0.00 kg / 0.00 LBS ~0 Gs

Two magnetic products attract each other from a significantly greater distance than a magnet and sheet combination. Such a system of two magnets generates a stronger field and a larger range of operation. Designing a powerful holder? Utilize two neodymiums instead of a neodymium and a steel. Be careful that when bringing together two magnets, the impact force is extreme. The repulsion force is a bit weaker than the attraction, but still significant.
*Flux density for N-N configuration reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).
Important: Estimates refer to shear force of two identical neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MP 10x7/3.5x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	4.5 cm
Hearing aid	10 Gs (1.0 mT)	3.5 cm
Mechanical watch	20 Gs (2.0 mT)	3.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	2.0 cm
Remote	50 Gs (5.0 mT)	2.0 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field poses a large risk to IT equipment as well as medical implants. These NdFeB products generate a field that disrupts operation of sensitive medical devices. Be aware: the unseen radiation penetrates the body and housings. Increased vigilance must be exercised by people with hearing aids and insulin pumps. Influence will be felt by: mechanical watches, remotes, membranes, and screens. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - collision effects
MP 10x7/3.5x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	35.25 km/h (9.79 m/s)	0.07 J
30 mm	60.84 km/h (16.90 m/s)	0.22 J
50 mm	78.54 km/h (21.82 m/s)	0.37 J
100 mm	111.07 km/h (30.85 m/s)	0.74 J

Magnetic elements are very brittle – a collision with steel can result in shattering. Control the attraction moment – a neodymium left loose speeds with massive force. Kinetic force can cause material chips or painful pinches to fingers. Always hold the magnet during installation so it doesn't hit with great force against the steel surface. A collision at high speed almost guarantees destruction of the neodymium. Wear eye protection when working with large magnets.

Table 9: Coating parameters (durability)
MP 10x7/3.5x3 / 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: Electrical data (P_c)
MP 10x7/3.5x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	1 899 Mx	19.0 µWb
P_c Coefficient	0.37	Low (Flat)

Flux value passing through the magnet pole. Essential parameter in coil applications as well as sensors. P_c value determines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 10x7/3.5x3 / N38

Environment	Effective steel pull	Effect
Air (land)	1.88 kg	Standard
Water (riverbed)	2.15 kg (+0.27 kg buoyancy gain)	+14.5%

Corrosion warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

*Note: On a vertical surface, the magnet retains only a fraction of its perpendicular strength.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely reduces the holding force.

3. Heat tolerance

*For standard magnets, the safety limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.37

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.

Engineering data and GPSR

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%

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: 030180-2026

Magnet Unit Converter

Magnet pull force

Kilograms (kg)

lbs

Magnetic Field

Gauss (Gs)

Tesla (T)

Simply fill in one field, and the tool compute the rest instantly.

UMT 12x20 green / N38 - board holder

1.894 ZŁ brutto / pcs

Product available Ships tomorrow

SM 18x275 [2xM5] / N42 - magnetic separator

608.85 ZŁ brutto / pcs

Product available Ships tomorrow

MW 2x10 / N38 - cylindrical magnet

0.1845 ZŁ brutto / pcs

Product available Ships tomorrow

MW 8x20 / N38 - cylindrical magnet

4.60 ZŁ brutto / pcs

The ring-shaped magnet MP 10x7/3.5x3 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 1.88 kg works great as a door latch, speaker holder, or mounting element in devices.

This material behaves more like porcelain than steel, so it doesn't forgive mistakes during mounting. When tightening the screw, you must maintain great sensitivity. 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.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. 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. This product is dedicated for inside building use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

A screw or bolt with a thread diameter smaller than 7/3.5 mm fits this model. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Always check that the screw head is not larger than the outer diameter of the magnet (10 mm), so it doesn't protrude beyond the outline.

It is a magnetic ring with a diameter of 10 mm and thickness 3 mm. The key parameter here is the lifting capacity amounting to approximately 1.88 kg (force ~18.47 N). The mounting hole diameter is precisely 7/3.5 mm.

These magnets are magnetized axially (through the thickness), which means one flat side is the N pole and the other is S. In the case of connecting two rings, make sure one is turned the right way. 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 rare earth magnets.

Benefits

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

They retain full power for nearly 10 years – the loss is just ~1% (in theory),
They do not lose their magnetic properties even under strong external field,
Thanks to the shiny finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an elegant appearance,
Magnets have huge magnetic induction on the outer layer,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to the option of free molding and customization to individualized needs, neodymium magnets can be manufactured in a wide range of shapes and sizes, which makes them more universal,
Universal use in high-tech industry – they are utilized in magnetic memories, electromotive mechanisms, precision medical tools, and industrial machines.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in compact constructions

Weaknesses

Disadvantages of neodymium magnets:

To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
Limited possibility of producing nuts in the magnet and complicated shapes - preferred is a housing - magnetic holder.
Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these devices are able to be problematic in diagnostics 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

Highest magnetic holding force – what affects it?

The declared magnet strength concerns the limit force, measured under optimal environment, specifically:

on a base made of mild steel, effectively closing the magnetic field
with a cross-section of at least 10 mm
with an ideally smooth touching surface
under conditions of ideal adhesion (surface-to-surface)
for force applied at a right angle (pull-off, not shear)
at conditions approx. 20°C

Key elements affecting lifting force

Please note that the magnet holding will differ depending on the following factors, starting with the most relevant:

Distance (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
Base massiveness – too thin plate does not accept the full field, causing part of the power to be escaped to the other side.
Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
Smoothness – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
Temperature influence – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity was measured using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate decreases the holding force.

Precautions when working with NdFeB magnets

Do not give to children

These products are not toys. Swallowing a few magnets may result in them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.

Beware of splinters

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.

Finger safety

Watch your fingers. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Compass and GPS

A strong magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Keep magnets near a device to prevent damaging the sensors.

Electronic devices

Equipment safety: Strong magnets can damage data carriers and delicate electronics (pacemakers, medical aids, mechanical watches).

Maximum temperature

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Implant safety

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Mechanical processing

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

Caution required

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

Warning for allergy sufferers

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, cease working with magnets and wear gloves.

Warning! Want to know more? Check our post: Why are neodymium magnets dangerous?

MP 10x7/3.5x3 / N38 - ring magnet

Physical properties - MP 10x7/3.5x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the magnet - technical parameters

Table 1: Static pull force (force vs gap) - characteristics MP 10x7/3.5x3 / N38

Table 2: Shear force (vertical surface) MP 10x7/3.5x3 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MP 10x7/3.5x3 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MP 10x7/3.5x3 / N38

Table 5: Thermal resistance (stability) - power drop MP 10x7/3.5x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MP 10x7/3.5x3 / N38

Table 7: Protective zones (implants) - warnings MP 10x7/3.5x3 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 10x7/3.5x3 / N38

Table 9: Coating parameters (durability) MP 10x7/3.5x3 / N38

Table 10: Electrical data (Pc) MP 10x7/3.5x3 / N38

Table 11: Underwater work (magnet fishing) MP 10x7/3.5x3 / N38

1. Vertical hold

2. Plate thickness effect

3. Heat tolerance

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

Chemical composition

Sustainability

Magnet pull force

Magnetic Field

See also products

UMT 12x20 green / N38 - board holder

SM 18x275 [2xM5] / N42 - magnetic separator

MW 2x10 / N38 - cylindrical magnet

MW 8x20 / N38 - cylindrical magnet

Strengths as well as weaknesses of rare earth magnets.

Benefits

Weaknesses

Holding force characteristics

Highest magnetic holding force – what affects it?

Key elements affecting lifting force

Precautions when working with NdFeB magnets

Do not give to children

Beware of splinters

Finger safety

Compass and GPS

Electronic devices

Maximum temperature

Implant safety

Mechanical processing

Caution required

Warning for allergy sufferers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs gap) - characteristics
MP 10x7/3.5x3 / N38

Table 2: Shear force (vertical surface)
MP 10x7/3.5x3 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 10x7/3.5x3 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MP 10x7/3.5x3 / N38

Table 5: Thermal resistance (stability) - power drop
MP 10x7/3.5x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 10x7/3.5x3 / N38

Table 7: Protective zones (implants) - warnings
MP 10x7/3.5x3 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 10x7/3.5x3 / N38

Table 9: Coating parameters (durability)
MP 10x7/3.5x3 / N38

Table 10: Electrical data (P_c)
MP 10x7/3.5x3 / N38

Table 11: Underwater work (magnet fishing)
MP 10x7/3.5x3 / N38