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MP 15x7/3.5x3 / 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 030182

GTIN/EAN: 5906301811992

5.00

Diameter

15 mm [±0,1 mm]

internal diameter Ø

7/3.5 mm [±0,1 mm]

Height

3 mm [±0,1 mm]

Weight

3.76 g

Magnetization Direction

↑ axial

Load capacity

2.71 kg / 26.61 N

Magnetic Induction

230.16 mT / 2302 Gs

Coating

[NiCuNi] Nickel

product parameters »

1.747 ZŁ with VAT / pcs + price for transport

1.420 ZŁ net + 23% VAT / pcs

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Technical specification - MP 15x7/3.5x3 / N38 - ring magnet

Specification / characteristics - MP 15x7/3.5x3 / N38 - ring magnet

properties

properties	values
Cat. no.	030182
GTIN/EAN	5906301811992
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	15 mm [±0,1 mm]
internal diameter Ø	7/3.5 mm [±0,1 mm]
Height	3 mm [±0,1 mm]
Weight	3.76 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.71 kg / 26.61 N
Magnetic Induction ~ ?	230.16 mT / 2302 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 15x7/3.5x3 / 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 analysis of the product - technical parameters

The following information represent the outcome of a engineering simulation. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Actual parameters might slightly differ from theoretical values. Please consider these data as a supplementary guide for designers.

Table 1: Static pull force (force vs distance) - characteristics
MP 15x7/3.5x3 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1995 Gs 199.5 mT	2.71 kg / 5.97 lbs 2710.0 g / 26.6 N	strong
1 mm	1833 Gs 183.3 mT	2.29 kg / 5.05 lbs 2289.1 g / 22.5 N	strong
2 mm	1618 Gs 161.8 mT	1.78 kg / 3.93 lbs 1784.1 g / 17.5 N	low risk
3 mm	1385 Gs 138.5 mT	1.31 kg / 2.88 lbs 1307.5 g / 12.8 N	low risk
5 mm	959 Gs 95.9 mT	0.63 kg / 1.38 lbs 627.1 g / 6.2 N	low risk
10 mm	362 Gs 36.2 mT	0.09 kg / 0.20 lbs 89.3 g / 0.9 N	low risk
15 mm	156 Gs 15.6 mT	0.02 kg / 0.04 lbs 16.5 g / 0.2 N	low risk
20 mm	78 Gs 7.8 mT	0.00 kg / 0.01 lbs 4.1 g / 0.0 N	low risk
30 mm	27 Gs 2.7 mT	0.00 kg / 0.00 lbs 0.5 g / 0.0 N	low risk
50 mm	6 Gs 0.6 mT	0.00 kg / 0.00 lbs 0.0 g / 0.0 N	low risk

Grip strength decreases drastically per each millimeter of gap. Note that even the smallest gap (e.g., contamination, varnish, rust) significantly diminishes the holding power. Magnets work strongest in perfect adhesion; distance kills the power. Analyze how flashily the pull force drop, when the magnet does not touch directly to the metal substrate. When calculating the mounting, avoid additional spacers.

Table 2: Slippage load (vertical surface)
MP 15x7/3.5x3 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.54 kg / 1.19 lbs 542.0 g / 5.3 N
1 mm	Stal (~0.2)	0.46 kg / 1.01 lbs 458.0 g / 4.5 N
2 mm	Stal (~0.2)	0.36 kg / 0.78 lbs 356.0 g / 3.5 N
3 mm	Stal (~0.2)	0.26 kg / 0.58 lbs 262.0 g / 2.6 N
5 mm	Stal (~0.2)	0.13 kg / 0.28 lbs 126.0 g / 1.2 N
10 mm	Stal (~0.2)	0.02 kg / 0.04 lbs 18.0 g / 0.2 N
15 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 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

This section shows the theoretical weight limit needed to cause the sliding of the magnet downwards on a upright steel wall (considering typical friction). This value depends on the gap size between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 15x7/3.5x3 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.81 kg / 1.79 lbs 813.0 g / 8.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.54 kg / 1.19 lbs 542.0 g / 5.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.27 kg / 0.60 lbs 271.0 g / 2.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.36 kg / 2.99 lbs 1355.0 g / 13.3 N

When placing a element on a vertical wall (e.g., a car body), it will only hold just approx. 20%-30% of its nominal power. Gravity as well as a low friction coefficient influence the fact that holders move down easier than they pop off the substrate. Want to create a vertical fastening? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the magnet will slip down under a noticeably lighter weight. Utilizing a rubberized coating can drastically improve the result.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 15x7/3.5x3 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.27 kg / 0.60 lbs 271.0 g / 2.7 N
1 mm	25%	0.68 kg / 1.49 lbs 677.5 g / 6.6 N
2 mm	50%	1.36 kg / 2.99 lbs 1355.0 g / 13.3 N
3 mm	75%	2.03 kg / 4.48 lbs 2032.5 g / 19.9 N
5 mm	100%	2.71 kg / 5.97 lbs 2710.0 g / 26.6 N
10 mm	100%	2.71 kg / 5.97 lbs 2710.0 g / 26.6 N
11 mm	100%	2.71 kg / 5.97 lbs 2710.0 g / 26.6 N
12 mm	100%	2.71 kg / 5.97 lbs 2710.0 g / 26.6 N

A thin metal plate cannot focus the entire magnetic field, which squanders power of the magnet. Should you mount a strong magnet to a thin surface, the field will penetrate right through and the attraction force will be weaker. To achieve 100% of this magnet's potential, you require a sufficiently solid piece of metal. The saturation effect means that on delicate walls (e.g., appliance housings), the product works worse. We recommend selecting the steel cross-section from these parameters.

Table 5: Working in heat (stability) - resistance threshold
MP 15x7/3.5x3 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.71 kg / 5.97 lbs 2710.0 g / 26.6 N	OK
40 °C	-2.2%	2.65 kg / 5.84 lbs 2650.4 g / 26.0 N	OK
60 °C	-4.4%	2.59 kg / 5.71 lbs 2590.8 g / 25.4 N
80 °C	-6.6%	2.53 kg / 5.58 lbs 2531.1 g / 24.8 N
100 °C	-28.8%	1.93 kg / 4.25 lbs 1929.5 g / 18.9 N

Ordinary NdFeB products irreversibly lose parameters above the temperature limit. Watch out for overheating – heat can irreversibly destroy this product. With every degree above norm, the magnet's power momentarily decreases. Refrain from using this magnet close to heaters exceeding its operating temperature limit. Too high temperature will lead to permanent loss of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization sooner than taller cylinders. Red status in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 15x7/3.5x3 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	3.48 kg / 7.68 lbs 3 483 Gs	0.52 kg / 1.15 lbs 523 g / 5.1 N	N/A
1 mm	3.24 kg / 7.14 lbs 3 846 Gs	0.49 kg / 1.07 lbs 486 g / 4.8 N	2.91 kg / 6.43 lbs ~0 Gs
2 mm	2.94 kg / 6.49 lbs 3 666 Gs	0.44 kg / 0.97 lbs 441 g / 4.3 N	2.65 kg / 5.84 lbs ~0 Gs
3 mm	2.62 kg / 5.78 lbs 3 460 Gs	0.39 kg / 0.87 lbs 393 g / 3.9 N	2.36 kg / 5.20 lbs ~0 Gs
5 mm	1.98 kg / 4.36 lbs 3 004 Gs	0.30 kg / 0.65 lbs 296 g / 2.9 N	1.78 kg / 3.92 lbs ~0 Gs
10 mm	0.81 kg / 1.78 lbs 1 919 Gs	0.12 kg / 0.27 lbs 121 g / 1.2 N	0.73 kg / 1.60 lbs ~0 Gs
20 mm	0.11 kg / 0.25 lbs 724 Gs	0.02 kg / 0.04 lbs 17 g / 0.2 N	0.10 kg / 0.23 lbs ~0 Gs
50 mm	0.00 kg / 0.00 lbs 88 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 54 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 35 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 24 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 17 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 13 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums interact from a much further distance than a magnet and steel combination. Such a system of magnet-to-magnet generates a stronger field and a further horizon of action. Want to build a powerful holder? Use a pair of magnets instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the collision energy is huge. The levitation is slightly lower than the attraction, but still large.
*Flux density for N-N configuration is approximately ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Attention: Calculations apply to sliding force of a pair of same neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - warnings
MP 15x7/3.5x3 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.5 cm
Hearing aid	10 Gs (1.0 mT)	4.5 cm
Mechanical watch	20 Gs (2.0 mT)	3.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.0 cm
Remote	50 Gs (5.0 mT)	2.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Extremely neodym field poses a large risk to electronics as well as medical implants. These magnets produce a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation penetrates the body and plastic. Special caution must be taken by people with cochlear implants and drug dispensers. The risk also applies to: mechanical watches, car keys, membranes, and displays. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MP 15x7/3.5x3 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	27.63 km/h (7.67 m/s)	0.11 J
30 mm	46.90 km/h (13.03 m/s)	0.32 J
50 mm	60.54 km/h (16.82 m/s)	0.53 J
100 mm	85.62 km/h (23.78 m/s)	1.06 J

Magnetic elements are very brittle – a strong collision with metal can result in shattering. Watch the impact speed – a neodymium left loose becomes dangerous. Kinetic force can destroy the magnet or dangerous crushing to skin. Be sure to control the product during installation so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Corrosion resistance
MP 15x7/3.5x3 / 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 SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (P_c)
MP 15x7/3.5x3 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	3 461 Mx	34.6 µWb
P_c Coefficient	0.26	Low (Flat)

Total magnetic flux emitted by the magnet pole. Essential parameter for generator designers as well as sensors. P_c value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 15x7/3.5x3 / N38

Environment	Effective steel pull	Effect
Air (land)	2.71 kg	Standard
Water (riverbed)	3.10 kg (+0.39 kg buoyancy gain)	+14.5%

Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

Water displaces steel, making heavy objects slightly lighter. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

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

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.

3. Thermal stability

*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) = 0.26

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 and environmental data

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%

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: 030182-2026

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MP 5x2.7/1.2x5 C / N38 - ring magnet

0.836 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 2.71 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 15x7/3.5x3 / 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 excessive force will cause the ring to crack. The flat screw head should evenly press the magnet. 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 rubberized holders 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 (15 mm), so it doesn't protrude beyond the outline.

It is a magnetic ring with a diameter of 15 mm and thickness 3 mm. The pulling force of this model is an impressive 2.71 kg, which translates to 26.61 N in newtons. 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. 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.

Pros and cons of Nd₂Fe₁₄B magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:

They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
They feature excellent resistance to magnetism drop due to external fields,
Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an visually attractive appearance,
Magnetic induction on the working part of the magnet remains extremely intense,
Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
Possibility of precise modeling as well as optimizing to defined conditions,
Huge importance in electronics industry – they serve a role in hard drives, electric motors, advanced medical instruments, as well as other advanced devices.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
When exposed to high temperature, neodymium magnets experience a drop in force. 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
Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
Limited ability of making nuts in the magnet and complex shapes - recommended is a housing - magnet mounting.
Potential hazard resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices can be problematic in diagnostics medical in case of swallowing.
Due to complex production process, their price is higher than average,

Pull force analysis

Detachment force of the magnet in optimal conditions – what affects it?

The declared magnet strength concerns the maximum value, recorded under laboratory conditions, namely:

with the use of a yoke made of low-carbon steel, guaranteeing maximum field concentration
possessing a massiveness of minimum 10 mm to avoid saturation
with a surface cleaned and smooth
under conditions of gap-free contact (surface-to-surface)
under axial force direction (90-degree angle)
at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual holding force results from a number of factors, listed from the most important:

Distance (between the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
Angle of force application – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
Steel type – mild steel gives the best results. Higher carbon content lower magnetic properties and holding force.
Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.

H&S for magnets

Fragile material

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Permanent damage

Avoid heat. NdFeB magnets are sensitive to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Powerful field

Use magnets consciously. Their immense force can shock even experienced users. Be vigilant and respect their power.

Life threat

Patients with a heart stimulator should keep an large gap from magnets. The magnetic field can stop the functioning of the implant.

Electronic devices

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Keep away from electronics

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Sensitization to coating

Nickel alert: The nickel-copper-nickel coating contains nickel. If redness happens, cease working with magnets and use protective gear.

Machining danger

Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this risks ignition.

Bone fractures

Protect your hands. Two powerful magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!

Product not for children

Always keep magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are tragic.

Danger! More info about risks in the article: Safety of working with magnets.

MP 15x7/3.5x3 / N38 - ring magnet

Technical specification - MP 15x7/3.5x3 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the product - technical parameters

Table 1: Static pull force (force vs distance) - characteristics MP 15x7/3.5x3 / N38

Table 2: Slippage load (vertical surface) MP 15x7/3.5x3 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MP 15x7/3.5x3 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MP 15x7/3.5x3 / N38

Table 5: Working in heat (stability) - resistance threshold MP 15x7/3.5x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system MP 15x7/3.5x3 / N38

Table 7: Hazards (electronics) - warnings MP 15x7/3.5x3 / N38

Table 8: Dynamics (cracking risk) - collision effects MP 15x7/3.5x3 / N38

Table 9: Corrosion resistance MP 15x7/3.5x3 / N38

Table 10: Construction data (Pc) MP 15x7/3.5x3 / N38

Table 11: Underwater work (magnet fishing) MP 15x7/3.5x3 / N38

1. Vertical hold

2. Efficiency vs thickness

3. Thermal stability

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

Elemental analysis

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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Pros and cons of Nd2Fe14B magnets.

Benefits

Disadvantages

Pull force analysis

Detachment force of the magnet in optimal conditions – what affects it?

Impact of factors on magnetic holding capacity in practice

H&S for magnets

Fragile material

Permanent damage

Powerful field

Life threat

Electronic devices

Keep away from electronics

Sensitization to coating

Machining danger

Bone fractures

Product not for children

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (force vs distance) - characteristics
MP 15x7/3.5x3 / N38

Table 2: Slippage load (vertical surface)
MP 15x7/3.5x3 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 15x7/3.5x3 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 15x7/3.5x3 / N38

Table 5: Working in heat (stability) - resistance threshold
MP 15x7/3.5x3 / N38

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MP 15x7/3.5x3 / N38

Table 7: Hazards (electronics) - warnings
MP 15x7/3.5x3 / N38

Table 8: Dynamics (cracking risk) - collision effects
MP 15x7/3.5x3 / N38

Table 9: Corrosion resistance
MP 15x7/3.5x3 / N38

Table 10: Construction data (P_c)
MP 15x7/3.5x3 / N38

Table 11: Underwater work (magnet fishing)
MP 15x7/3.5x3 / N38

Pros and cons of Nd₂Fe₁₄B magnets.