Product on order Ships in 3-5 days

MP 12x5x2 / 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 030498

Diameter

12 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

Height

2 mm [±0,1 mm]

Weight

1.4 g

Magnetization Direction

↑ axial

Load capacity

1.15 kg / 11.29 N

Magnetic Induction

195.97 mT / 1960 Gs

Coating

[NiCuNi] Nickel

product details »

1.230 ZŁ with VAT / pcs + price for transport

1.000 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

1.000 ZŁ

1.230 ZŁ

price from 600 pcs

0.940 ZŁ

1.156 ZŁ

price from 2500 pcs

0.880 ZŁ

1.082 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Hunting for a discount?

Call us now +48 888 99 98 98 or let us know using our online form the contact form page.
Parameters as well as form of magnetic components can be analyzed using our online calculation tool.

Orders placed before 14:00 will be shipped the same business day.

Technical data of the product - MP 12x5x2 / N38 - ring magnet

Specification / characteristics - MP 12x5x2 / N38 - ring magnet

properties

properties	values
Cat. no.	030498
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	12 mm [±0,1 mm]
internal diameter Ø	5 mm [±0,1 mm]
Height	2 mm [±0,1 mm]
Weight	1.4 g
Magnetization Direction	↑ axial
Load capacity ~ ?	1.15 kg / 11.29 N
Magnetic Induction ~ ?	195.97 mT / 1960 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 12x5x2 / 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

Technical simulation of the assembly - data

Presented data represent the result of a mathematical calculation. Results rely on algorithms for the material Nd₂Fe₁₄B. Real-world parameters may deviate from the simulation results. Please consider these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - interaction chart
MP 12x5x2 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	6085 Gs 608.5 mT	1.15 kg / 2.54 pounds 1150.0 g / 11.3 N	safe
1 mm	5082 Gs 508.2 mT	0.80 kg / 1.77 pounds 802.2 g / 7.9 N	safe
2 mm	4147 Gs 414.7 mT	0.53 kg / 1.18 pounds 534.0 g / 5.2 N	safe
3 mm	3340 Gs 334.0 mT	0.35 kg / 0.76 pounds 346.3 g / 3.4 N	safe
5 mm	2152 Gs 215.2 mT	0.14 kg / 0.32 pounds 143.8 g / 1.4 N	safe
10 mm	822 Gs 82.2 mT	0.02 kg / 0.05 pounds 21.0 g / 0.2 N	safe
15 mm	394 Gs 39.4 mT	0.00 kg / 0.01 pounds 4.8 g / 0.0 N	safe
20 mm	221 Gs 22.1 mT	0.00 kg / 0.00 pounds 1.5 g / 0.0 N	safe
30 mm	92 Gs 9.2 mT	0.00 kg / 0.00 pounds 0.3 g / 0.0 N	safe
50 mm	28 Gs 2.8 mT	0.00 kg / 0.00 pounds 0.0 g / 0.0 N	safe

Pulling power drops drastically per each millimeter of spacing. Note that even a very thin break (e.g., contamination, varnish, rust) significantly diminishes the holding power. Magnetic products hold most effectively during direct contact; gap kills the power. Notice how flashily the parameters drop, when the product does not adhere directly to the metal substrate. When planning the mounting, avoid unnecessary gaps.

Table 2: Shear force (vertical surface)
MP 12x5x2 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.23 kg / 0.51 pounds 230.0 g / 2.3 N
1 mm	Stal (~0.2)	0.16 kg / 0.35 pounds 160.0 g / 1.6 N
2 mm	Stal (~0.2)	0.11 kg / 0.23 pounds 106.0 g / 1.0 N
3 mm	Stal (~0.2)	0.07 kg / 0.15 pounds 70.0 g / 0.7 N
5 mm	Stal (~0.2)	0.03 kg / 0.06 pounds 28.0 g / 0.3 N
10 mm	Stal (~0.2)	0.00 kg / 0.01 pounds 4.0 g / 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

This section defines the approximate weight limit sufficient to initiate the downward movement of the magnet down along a upright steel plate (considering typical friction). This value is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 12x5x2 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.35 kg / 0.76 pounds 345.0 g / 3.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.23 kg / 0.51 pounds 230.0 g / 2.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.11 kg / 0.25 pounds 115.0 g / 1.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.58 kg / 1.27 pounds 575.0 g / 5.6 N

When placing a holder on a upright wall (e.g., a board), it will maintain only about 1/5 of its nominal power. Gravitational force and a weak degree of grip influence the fact that holders slide down easier than they pop off the substrate. Planning a wall mount? Remember that the shear force is significantly lower than the perpendicular breakaway force. On a smooth steel, the element will slip down under a much lighter cargo. Using a rubber pad can drastically improve the result.

Table 4: Material efficiency (saturation) - power losses
MP 12x5x2 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.11 kg / 0.25 pounds 115.0 g / 1.1 N
1 mm	25%	0.29 kg / 0.63 pounds 287.5 g / 2.8 N
2 mm	50%	0.58 kg / 1.27 pounds 575.0 g / 5.6 N
3 mm	75%	0.86 kg / 1.90 pounds 862.5 g / 8.5 N
5 mm	100%	1.15 kg / 2.54 pounds 1150.0 g / 11.3 N
10 mm	100%	1.15 kg / 2.54 pounds 1150.0 g / 11.3 N
11 mm	100%	1.15 kg / 2.54 pounds 1150.0 g / 11.3 N
12 mm	100%	1.15 kg / 2.54 pounds 1150.0 g / 11.3 N

A thin metal plate is unable to focus the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a thin surface, the magnetism will pass right through and the holding will be smaller. To utilize full efficiency of this neodymium's power, you need a suitably thick element of steel. The material oversaturation causes that on delicate walls (e.g., appliance housings), the magnet works worse. We advise picking the steel dimension according to the table below.

Table 5: Thermal stability (stability) - thermal limit
MP 12x5x2 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	1.15 kg / 2.54 pounds 1150.0 g / 11.3 N	OK
40 °C	-2.2%	1.12 kg / 2.48 pounds 1124.7 g / 11.0 N	OK
60 °C	-4.4%	1.10 kg / 2.42 pounds 1099.4 g / 10.8 N	OK
80 °C	-6.6%	1.07 kg / 2.37 pounds 1074.1 g / 10.5 N
100 °C	-28.8%	0.82 kg / 1.81 pounds 818.8 g / 8.0 N

Standard neodymium magnets change their properties parameters after exceeding the maximum temperature. Watch out for overheating – high temperature can permanently destroy this magnet. As the temperature rises, the magnet's force temporarily drops. Refrain from using this magnet near heat sources exceeding its safe range. Exceeding the critical threshold will cause permanent loss of magnetism.

*Technical advisory: Temperature resistance is determined by both grade, as well as the dimension ratios. Flat magnets (pancake types) risk losing magnetic properties at lower temperatures compared to rod magnets. Red status in the table signals permanent field degradation for this specific geometry.

Table 6: Two magnets (repulsion) - forces in the system
MP 12x5x2 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	21.34 kg / 47.04 pounds 6 163 Gs	3.20 kg / 7.06 pounds 3201 g / 31.4 N	N/A
1 mm	17.97 kg / 39.61 pounds 11 168 Gs	2.69 kg / 5.94 pounds 2695 g / 26.4 N	16.17 kg / 35.65 pounds ~0 Gs
2 mm	14.88 kg / 32.81 pounds 10 165 Gs	2.23 kg / 4.92 pounds 2233 g / 21.9 N	13.40 kg / 29.53 pounds ~0 Gs
3 mm	12.20 kg / 26.89 pounds 9 202 Gs	1.83 kg / 4.03 pounds 1830 g / 17.9 N	10.98 kg / 24.20 pounds ~0 Gs
5 mm	8.00 kg / 17.63 pounds 7 450 Gs	1.20 kg / 2.64 pounds 1199 g / 11.8 N	7.20 kg / 15.87 pounds ~0 Gs
10 mm	2.67 kg / 5.88 pounds 4 304 Gs	0.40 kg / 0.88 pounds 400 g / 3.9 N	2.40 kg / 5.30 pounds ~0 Gs
20 mm	0.39 kg / 0.86 pounds 1 644 Gs	0.06 kg / 0.13 pounds 58 g / 0.6 N	0.35 kg / 0.77 pounds ~0 Gs
50 mm	0.01 kg / 0.02 pounds 275 Gs	0.00 kg / 0.00 pounds 2 g / 0.0 N	0.01 kg / 0.02 pounds ~0 Gs
60 mm	0.00 kg / 0.01 pounds 184 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.01 pounds 129 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 95 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 72 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 56 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two magnetic products attract each other from a significantly greater distance than a magnet and steel setup. Such a system of two magnets produces a massive flux and a further horizon of action. Planning to create a solid fastener? Apply two magnets instead of a neodymium and a steel. Exercise caution that when attracting two neodymiums, the pinch force is massive. The repulsion force is slightly lower than the attraction, but still large.
*The magnetic induction between like poles is approximately ~0 Gs at the midpoint of the gap (caused by magnetic field nullification).
Attention: Figures demonstrate shear force of two identical magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MP 12x5x2 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	10.0 cm
Hearing aid	10 Gs (1.0 mT)	8.0 cm
Mechanical watch	20 Gs (2.0 mT)	6.0 cm
Phone / Smartphone	40 Gs (4.0 mT)	4.5 cm
Car key	50 Gs (5.0 mT)	4.0 cm
Payment card	400 Gs (40.0 mT)	1.5 cm
HDD hard drive	600 Gs (60.0 mT)	1.5 cm

Extremely neodym field is a large risk to electronic devices and medical implants. These NdFeB products produce a field that prevents correct functioning of digital equipment. Remember: the invisible magnetic field penetrates the body and glass. Exceptional care must be exercised by people with hearing aids and insulin pumps. Influence will be felt by: automatic timepieces, remotes, speakers, and displays. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (kinetic energy) - warning
MP 12x5x2 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	29.23 km/h (8.12 m/s)	0.05 J
30 mm	50.07 km/h (13.91 m/s)	0.14 J
50 mm	64.63 km/h (17.95 m/s)	0.23 J
100 mm	91.40 km/h (25.39 m/s)	0.45 J

Magnetic elements are very brittle – a collision with steel 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 fingers. Hold the magnet firmly during mounting so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h means shattering of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Corrosion resistance
MP 12x5x2 / 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: Electrical data (P_c)
MP 12x5x2 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	6 503 Mx	65.0 µWb
P_c Coefficient	1.34	High (Stable)

Total magnetic flux emitted by the magnet pole. Key data in coil applications and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 12x5x2 / N38

Environment	Effective steel pull	Effect
Air (land)	1.15 kg	Standard
Water (riverbed)	1.32 kg (+0.17 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Shear force

*Note: On a vertical surface, the magnet holds just approx. 20-30% of its max power.

2. Efficiency vs thickness

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

3. Temperature resistance

*For N38 material, the critical limit is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 1.34

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 and environmental data

Material specification

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Environmental data

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 030498-2026

Quick Unit Converter

Force (pull)

Force in kg

Pounds (lbs)

Magnetic Field

Induction (Gs)

Tesla (T)

Input your figure in any box, and all other values convert in real-time.

View more proposals

Product on order Ships in 3-5 days

MPL 40x5x3 / N38 - lamellar magnet

6.65 ZŁ brutto / pcs

Product on order Ships in 3-5 days

UMH 36x8x46 [M6] / N38 - magnetic holder with hook

26.64 ZŁ brutto / pcs

Product on order Ships in 3-5 days

UMH 60x15x69 [M8] / N38 - magnetic holder with hook

143.91 ZŁ brutto / pcs

Product on order Ships in 3-5 days

SM 32x350 [2xM8] / N42 - magnetic separator

1045.50 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. Thanks to the hole (often for a screw), this model enables easy screwing to wood, wall, plastic, or metal. This product with a force of 1.15 kg works great as a cabinet closure, speaker holder, or spacer element in devices.

This is a crucial issue when working with model MP 12x5x2 / N38. Neodymium magnets are sintered ceramics, which means they are very brittle and inelastic. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.

These magnets are coated with standard Ni-Cu-Ni plating, which protects them in indoor conditions, but does not ensure full waterproofing. 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.

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. Always check that the screw head is not larger than the outer diameter of the magnet (12 mm), so it doesn't protrude beyond the outline.

The presented product is a ring magnet with dimensions Ø12 mm (outer diameter) and height 2 mm. The key parameter here is the lifting capacity amounting to approximately 1.15 kg (force ~11.29 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 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 as well as weaknesses of Nd₂Fe₁₄B magnets.

Advantages

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

They retain full power for nearly ten years – the drop is just ~1% (in theory),
They possess excellent resistance to magnetism drop as a result of opposing magnetic fields,
A magnet with a shiny silver surface is more attractive,
The surface of neodymium magnets generates a powerful magnetic field – this is a key feature,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
In view of the ability of accurate forming and customization to custom requirements, neodymium magnets can be produced in a broad palette of forms and dimensions, which makes them more universal,
Fundamental importance in high-tech industry – they serve a role in mass storage devices, electric drive systems, medical equipment, also technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which allows their use in small systems

Weaknesses

Disadvantages of neodymium magnets:

At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 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 as well as corrosion.
We suggest a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these products can complicate diagnosis medical when they are in the body.
High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

Breakaway force was determined for ideal contact conditions, taking into account:

using a plate made of mild steel, acting as a circuit closing element
possessing a thickness of at least 10 mm to avoid saturation
with a plane perfectly flat
with zero gap (without coatings)
for force applied at a right angle (in the magnet axis)
at temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

In practice, the actual lifting capacity results from several key aspects, ranked from crucial:

Clearance – the presence of foreign body (paint, tape, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
Base massiveness – insufficiently thick steel does not close the flux, causing part of the flux to be escaped to the other side.
Material composition – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, 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 decreases the holding force.

H&S for magnets

Thermal limits

Do not overheat. NdFeB magnets are susceptible to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Respect the power

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

Protect data

Intense magnetic fields can erase data on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.

Physical harm

Large magnets can crush fingers instantly. Never place your hand betwixt two attracting surfaces.

No play value

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

Combustion hazard

Powder generated during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Keep away from electronics

An intense magnetic field disrupts the operation of compasses in smartphones and navigation systems. Maintain magnets close to a smartphone to avoid damaging the sensors.

Medical implants

People with a heart stimulator should keep an safe separation from magnets. The magnetism can interfere with the functioning of the implant.

Fragile material

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

Skin irritation risks

Studies show that the nickel plating (the usual finish) is a common allergen. If you have an allergy, prevent touching magnets with bare hands or select versions in plastic housing.

Safety First! Want to know more? Read our article: Why are neodymium magnets dangerous?

MP 12x5x2 / N38 - ring magnet

Technical data of the product - MP 12x5x2 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the assembly - data

Table 1: Static pull force (pull vs gap) - interaction chart MP 12x5x2 / N38

Table 2: Shear force (vertical surface) MP 12x5x2 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MP 12x5x2 / N38

Table 4: Material efficiency (saturation) - power losses MP 12x5x2 / N38

Table 5: Thermal stability (stability) - thermal limit MP 12x5x2 / N38

Table 6: Two magnets (repulsion) - forces in the system MP 12x5x2 / N38

Table 7: Hazards (implants) - warnings MP 12x5x2 / N38

Table 8: Impact energy (kinetic energy) - warning MP 12x5x2 / N38

Table 9: Corrosion resistance MP 12x5x2 / N38

Table 10: Electrical data (Pc) MP 12x5x2 / N38

Table 11: Underwater work (magnet fishing) MP 12x5x2 / N38

1. Shear force

2. Efficiency vs thickness

3. Temperature resistance

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

Material specification

Environmental data

Force (pull)

Magnetic Field

View more proposals

MPL 40x5x3 / N38 - lamellar magnet

UMH 36x8x46 [M6] / N38 - magnetic holder with hook

UMH 60x15x69 [M8] / N38 - magnetic holder with hook

SM 32x350 [2xM8] / N42 - magnetic separator

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Weaknesses

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

Determinants of practical lifting force of a magnet

H&S for magnets

Thermal limits

Respect the power

Protect data

Physical harm

No play value

Combustion hazard

Keep away from electronics

Medical implants

Fragile material

Skin irritation risks

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - interaction chart
MP 12x5x2 / N38

Table 2: Shear force (vertical surface)
MP 12x5x2 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MP 12x5x2 / N38

Table 4: Material efficiency (saturation) - power losses
MP 12x5x2 / N38

Table 5: Thermal stability (stability) - thermal limit
MP 12x5x2 / N38

Table 6: Two magnets (repulsion) - forces in the system
MP 12x5x2 / N38

Table 7: Hazards (implants) - warnings
MP 12x5x2 / N38

Table 8: Impact energy (kinetic energy) - warning
MP 12x5x2 / N38

Table 9: Corrosion resistance
MP 12x5x2 / N38

Table 10: Electrical data (P_c)
MP 12x5x2 / N38

Table 11: Underwater work (magnet fishing)
MP 12x5x2 / N38

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.