Product available Ships today (order by 14:00)

MP 41x15x10 / N38 - ring magnet

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

ring magnet

Catalog no 030200

GTIN/EAN: 5906301812173

5.00

Load capacity 24.44 kg / 239.78 N Magnetic Induction 271.77 mT / 2718 Gs

Diameter: 41 mm [±0,1 mm]
internal diameter Ø: 15 mm [±0,1 mm]
Height: 10 mm [±0,1 mm]
Weight: 85.77 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical details »

40.65 zł net / pcs

50.00 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?

Quantity

Net

Gross

price from 1 pcs

40.65 zł

50.00 zł

price from 20 pcs

38.21 zł

47.00 zł

price from 70 pcs

35.77 zł

44.00 zł

Frequently asked questions

What is the hole in a ring magnet for?

For mounting on a screw or a shaft. The bore may be cylindrical or countersunk for a screw head. The hole removes magnet volume, so a ring holds less than a disc of the same outside diameter.

What is the polarisation?

Axial as standard — poles on the flat faces of the ring. Diametrical polarisation is made to order.

What sizes are available?

Outside diameter from 5 to 62 mm from stock. To order up to 200 mm outside diameter, 180 mm bore and 40 mm height, with a lead time of 25–35 days.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Detailed specification - MP 41x15x10 / N38 - ring magnet

Specification / characteristics - MP 41x15x10 / N38 - ring magnet

properties

properties	values
Cat. no.	030200
GTIN/EAN	5906301812173
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	41 mm [±0,1 mm]
internal diameter Ø	15 mm [±0,1 mm]
Height	10 mm [±0,1 mm]
Weight	85.77 g
Magnetization Direction	↑ axial
Load capacity ~ ?	24.44 kg / 239.78 N
Magnetic Induction ~ ?	271.77 mT / 2718 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 41x15x10 / N38 - ring magnet

properties	values	units
Remanence Br ?	12.2-12.6	kGs
Remanence Br ?	1220-1260	mT
Coercivity bHc ?	10.8-11.5	kOe
Coercivity bHc ?	860-915	kA/m
Intrinsic coercivity iHc	≥ 12	kOe
Intrinsic coercivity iHc	≥ 955	kA/m
Energy product BHmax ?	36-38	BH max MGOe
Energy product BHmax ?	287-303	BH max KJ/m
Maximum working 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	310	°C
Curie Temperature TF	590	°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 modeling of the assembly - technical parameters

The following data are the result of a engineering analysis. Values were calculated on algorithms for the material Nd₂Fe₁₄B. Operational parameters may differ from theoretical values. Treat these calculations as a preliminary roadmap for designers.

Table 1: Static force (force vs distance) - characteristics
MP 41x15x10 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	5232 Gs 523.2 mT	24.44 kg / 53.88 lbs 24440.0 g / 239.8 N	dangerous!
1 mm	4978 Gs 497.8 mT	22.12 kg / 48.77 lbs 22120.4 g / 217.0 N	dangerous!
2 mm	4720 Gs 472.0 mT	19.89 kg / 43.85 lbs 19888.8 g / 195.1 N	dangerous!
3 mm	4464 Gs 446.4 mT	17.79 kg / 39.22 lbs 17788.4 g / 174.5 N	dangerous!
5 mm	3964 Gs 396.4 mT	14.03 kg / 30.93 lbs 14030.8 g / 137.6 N	dangerous!
10 mm	2861 Gs 286.1 mT	7.31 kg / 16.11 lbs 7308.1 g / 71.7 N	strong
15 mm	2028 Gs 202.8 mT	3.67 kg / 8.09 lbs 3670.1 g / 36.0 N	strong
20 mm	1443 Gs 144.3 mT	1.86 kg / 4.10 lbs 1858.4 g / 18.2 N	low risk
30 mm	770 Gs 77.0 mT	0.53 kg / 1.17 lbs 529.8 g / 5.2 N	low risk
50 mm	280 Gs 28.0 mT	0.07 kg / 0.15 lbs 69.8 g / 0.7 N	low risk

Magnetic force drops significantly with every mm of gap. Note that every additional insulation layer (e.g., contamination, varnish, rust) significantly reduces the pull force. Magnets operate optimally in perfect adhesion; air break drastically cuts the force. See how quickly the load capacity fall, when the magnet does not adhere directly to the metal substrate. When planning the assembly, avoid additional spacers.

Table 2: Vertical load (wall)
MP 41x15x10 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	4.89 kg / 10.78 lbs 4888.0 g / 48.0 N
1 mm	Stal (~0.2)	4.42 kg / 9.75 lbs 4424.0 g / 43.4 N
2 mm	Stal (~0.2)	3.98 kg / 8.77 lbs 3978.0 g / 39.0 N
3 mm	Stal (~0.2)	3.56 kg / 7.84 lbs 3558.0 g / 34.9 N
5 mm	Stal (~0.2)	2.81 kg / 6.19 lbs 2806.0 g / 27.5 N
10 mm	Stal (~0.2)	1.46 kg / 3.22 lbs 1462.0 g / 14.3 N
15 mm	Stal (~0.2)	0.73 kg / 1.62 lbs 734.0 g / 7.2 N
20 mm	Stal (~0.2)	0.37 kg / 0.82 lbs 372.0 g / 3.6 N
30 mm	Stal (~0.2)	0.11 kg / 0.23 lbs 106.0 g / 1.0 N
50 mm	Stal (~0.2)	0.01 kg / 0.03 lbs 14.0 g / 0.1 N

The table below presents the estimated weight limit required to cause the slippage of the magnet vertically along a vertical steel plate (assuming typical friction coefficient). The holding force depends on the air gap between the magnet and the metal.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 41x15x10 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	7.33 kg / 16.16 lbs 7332.0 g / 71.9 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	4.89 kg / 10.78 lbs 4888.0 g / 48.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	2.44 kg / 5.39 lbs 2444.0 g / 24.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	12.22 kg / 26.94 lbs 12220.0 g / 119.9 N

When hanging a holder on a vertical plane (e.g., a board), it will maintain barely approx. 20%-30% of its maximum pull force. Gravitational force and a weak degree of grip cause that magnets move down easier than they detach. Designing a wall mount? Consider that the sliding force is much weaker than the perpendicular breakaway force. On a painted metal, the holder will slide down under a noticeably lighter load. Utilizing a rubberized layer can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 41x15x10 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	5%	1.22 kg / 2.69 lbs 1222.0 g / 12.0 N
1 mm	13%	3.06 kg / 6.74 lbs 3055.0 g / 30.0 N
2 mm	25%	6.11 kg / 13.47 lbs 6110.0 g / 59.9 N
3 mm	38%	9.17 kg / 20.21 lbs 9165.0 g / 89.9 N
5 mm	63%	15.28 kg / 33.68 lbs 15275.0 g / 149.8 N
10 mm	100%	24.44 kg / 53.88 lbs 24440.0 g / 239.8 N
11 mm	100%	24.44 kg / 53.88 lbs 24440.0 g / 239.8 N
12 mm	100%	24.44 kg / 53.88 lbs 24440.0 g / 239.8 N

A thin metal plate is incapable of take in the full magnetic flux, which squanders power of the holder. Should you attach a powerful product to a thin surface, the field will pass right through and the attraction force will be weaker. To achieve 100% of this magnet's potential, you need a suitably thick backing of steel. The saturation effect causes that on thin elements (e.g., appliance housings), the magnet works worse. We suggest choosing the steel dimension based on the following data.

Table 5: Thermal stability (stability) - power drop
MP 41x15x10 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	24.44 kg / 53.88 lbs 24440.0 g / 239.8 N	OK
40 °C	-2.2%	23.90 kg / 52.70 lbs 23902.3 g / 234.5 N	OK
60 °C	-4.4%	23.36 kg / 51.51 lbs 23364.6 g / 229.2 N	OK
80 °C	-6.6%	22.83 kg / 50.32 lbs 22827.0 g / 223.9 N
100 °C	-28.8%	17.40 kg / 38.36 lbs 17401.3 g / 170.7 N

Ordinary NdFeB products lose parameters above the temperature limit. Protect against heat – heat can permanently damage this magnet. As the temperature rises, the magnet's power briefly lowers. Do not use this magnet close to heaters higher than its safe range. Too high temperature will cause destruction of magnetism.

*Technical advisory: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Thin magnets (pancake types) risk losing magnetic properties at lower temperatures than taller cylinders. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MP 41x15x10 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Sliding Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	178.13 kg / 392.71 lbs 5 907 Gs	26.72 kg / 58.91 lbs 26719 g / 262.1 N	N/A
1 mm	169.67 kg / 374.06 lbs 10 213 Gs	25.45 kg / 56.11 lbs 25451 g / 249.7 N	152.70 kg / 336.65 lbs ~0 Gs
2 mm	161.22 kg / 355.43 lbs 9 955 Gs	24.18 kg / 53.32 lbs 24183 g / 237.2 N	145.10 kg / 319.89 lbs ~0 Gs
3 mm	152.98 kg / 337.26 lbs 9 697 Gs	22.95 kg / 50.59 lbs 22947 g / 225.1 N	137.68 kg / 303.53 lbs ~0 Gs
5 mm	137.18 kg / 302.42 lbs 9 183 Gs	20.58 kg / 45.36 lbs 20577 g / 201.9 N	123.46 kg / 272.18 lbs ~0 Gs
10 mm	102.26 kg / 225.45 lbs 7 929 Gs	15.34 kg / 33.82 lbs 15339 g / 150.5 N	92.04 kg / 202.90 lbs ~0 Gs
20 mm	53.26 kg / 117.43 lbs 5 722 Gs	7.99 kg / 17.61 lbs 7990 g / 78.4 N	47.94 kg / 105.69 lbs ~0 Gs
50 mm	7.08 kg / 15.62 lbs 2 087 Gs	1.06 kg / 2.34 lbs 1063 g / 10.4 N	6.38 kg / 14.06 lbs ~0 Gs
60 mm	3.86 kg / 8.51 lbs 1 541 Gs	0.58 kg / 1.28 lbs 579 g / 5.7 N	3.48 kg / 7.66 lbs ~0 Gs
70 mm	2.20 kg / 4.84 lbs 1 162 Gs	0.33 kg / 0.73 lbs 330 g / 3.2 N	1.98 kg / 4.36 lbs ~0 Gs
80 mm	1.30 kg / 2.87 lbs 895 Gs	0.20 kg / 0.43 lbs 195 g / 1.9 N	1.17 kg / 2.58 lbs ~0 Gs
90 mm	0.80 kg / 1.76 lbs 701 Gs	0.12 kg / 0.26 lbs 120 g / 1.2 N	0.72 kg / 1.59 lbs ~0 Gs
100 mm	0.51 kg / 1.12 lbs 559 Gs	0.08 kg / 0.17 lbs 76 g / 0.7 N	0.46 kg / 1.01 lbs ~0 Gs

Two magnetic products attract each other from a much further distance than a magnet and sheet combination. The setup of two magnets creates a more powerful interaction and a larger range of action. Want to build a strong closure? Apply two magnets instead of a neodymium and a steel. Remember that when attracting two neodymiums, the pinch force is massive. The repulsion force is a bit weaker than the attraction, but still large.
*Flux density between like poles is approximately ~0 Gs at the geometric center of the gap (caused by magnetic field nullification).
Attention: Figures refer to friction force of dual same neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - warnings
MP 41x15x10 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	24.0 cm
Hearing aid	10 Gs (1.0 mT)	19.0 cm
Timepiece	20 Gs (2.0 mT)	15.0 cm
Mobile device	40 Gs (4.0 mT)	11.5 cm
Remote	50 Gs (5.0 mT)	10.5 cm
Payment card	400 Gs (40.0 mT)	4.5 cm
HDD hard drive	600 Gs (60.0 mT)	3.5 cm

Extremely neodym field is a real danger to IT equipment and medical implants. These neodymiums generate a field that prevents correct functioning of digital equipment. Notice: the invisible magnetic field penetrates the body and plastic. Special caution must be exercised by people with cochlear implants and insulin pumps. The risk also applies to: automatic timepieces, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (cracking risk) - warning
MP 41x15x10 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.85 km/h (5.79 m/s)	1.44 J
30 mm	24.15 km/h (6.71 m/s)	1.93 J
50 mm	24.42 km/h (6.78 m/s)	1.97 J
100 mm	24.47 km/h (6.80 m/s)	1.98 J

NdFeB products are delicate – a collision with steel can result in shattering. Control the attraction moment – a magnet released freely turns into a projectile. Striking energy can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when handling with powerful specimens.

Table 9: Anti-corrosion coating durability
MP 41x15x10 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (P_c)
MP 41x15x10 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	56 505 Mx	565.0 µWb
P_c Coefficient	0.80	High (Stable)

Total magnetic flux passing through the magnet pole. Essential parameter when building generators and motors. The P_c coefficient defines the magnet's operating point.

Table 11: Physics of underwater searching
MP 41x15x10 / N38

Environment	Effective steel pull	Effect
Air (land)	24.44 kg	Standard
Water (riverbed)	27.98 kg (+3.54 kg buoyancy gain)	+14.5%

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

The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

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

2. Steel thickness impact

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

3. Power loss vs temp

*For standard magnets, 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) = 0.80

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%

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: 030200-2026

Quick Unit Converter

Magnet pull force

Force in kg

Newtons (N)

lbs

Magnetic Induction

Induction (T)

Insert your figure in one of the inputs, and all other values change in real-time.

Other proposals

Product available Ships today (order by 14:00)

RM R7 SUPER - 13000 Gs / N52 - magnetic distributor

160.00 zł brutto / pcs

Product available Ships today (order by 14:00)

SM 25x250 [2xM8] / N42 - magnetic separator

688.80 zł brutto / pcs

Product available Ships today (order by 14:00)

UI 45x13x6 [C321] / N38 - badge holder

2.40 zł brutto / pcs

Product available Ships today (order by 14:00)

UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

23.99 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. It is also often used in advertising for fixing signs and in workshops for organizing tools.

This is a crucial issue when working with model MP 41x15x10 / 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. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. Damage to the protective layer during assembly is the most common cause of rusting. This product is dedicated for indoor use. For outdoor applications, we recommend choosing magnets in hermetic housing or additional protection with varnish.

The inner hole diameter determines the maximum size of the mounting element. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.

The presented product is a ring magnet with dimensions Ø41 mm (outer diameter) and height 10 mm. The key parameter here is the lifting capacity amounting to approximately 24.44 kg (force ~239.78 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 15 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.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Pros

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% (based on calculations),
They possess excellent resistance to magnetic field loss due to external fields,
A magnet with a smooth gold surface looks better,
Magnetic induction on the top side of the magnet turns out to be impressive,
Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
Thanks to the ability of flexible molding and customization to custom solutions, NdFeB magnets can be produced in a broad palette of forms and dimensions, which expands the range of possible applications,
Wide application in modern technologies – they serve a role in magnetic memories, electric motors, advanced medical instruments, also industrial machines.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Disadvantages

Cons of neodymium magnets and ways of using them

To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
We recommend casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated shapes.
Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products can complicate diagnosis medical after entering the body.
Due to expensive raw materials, their price is relatively high,

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

Breakaway force was defined for optimal configuration, taking into account:

on a block made of structural steel, effectively closing the magnetic field
possessing a thickness of at least 10 mm to avoid saturation
with a surface perfectly flat
under conditions of no distance (surface-to-surface)
under axial force vector (90-degree angle)
at ambient temperature room level

What influences lifting capacity in practice

In real-world applications, the actual lifting capacity results from several key aspects, listed from crucial:

Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
Load vector – highest force is available only during perpendicular pulling. The shear force of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Steel grade – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
Surface finish – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets

Magnet fragility

Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. Wear goggles.

Medical implants

Warning for patients: Powerful magnets affect medical devices. Maintain at least 30 cm distance or request help to work with the magnets.

Fire risk

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Allergy Warning

Some people suffer from a sensitization to nickel, which is the common plating for NdFeB magnets. Frequent touching might lead to an allergic reaction. It is best to wear protective gloves.

Product not for children

Strictly keep magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are very dangerous.

Respect the power

Use magnets consciously. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.

Hand protection

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

Data carriers

Powerful magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.

Compass and GPS

A powerful magnetic field negatively affects the functioning of magnetometers in smartphones and navigation systems. Maintain magnets close to a device to avoid breaking the sensors.

Demagnetization risk

Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Important! Need more info? Check our post: Are neodymium magnets dangerous?

MP 41x15x10 / N38 - ring magnet

Detailed specification - MP 41x15x10 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the assembly - technical parameters

Table 1: Static force (force vs distance) - characteristics MP 41x15x10 / N38

Table 2: Vertical load (wall) MP 41x15x10 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces MP 41x15x10 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection MP 41x15x10 / N38

Table 5: Thermal stability (stability) - power drop MP 41x15x10 / N38

Table 6: Two magnets (attraction) - forces in the system MP 41x15x10 / N38

Table 7: Safety (HSE) (electronics) - warnings MP 41x15x10 / N38

Table 8: Impact energy (cracking risk) - warning MP 41x15x10 / N38

Table 9: Anti-corrosion coating durability MP 41x15x10 / N38

Table 10: Electrical data (Pc) MP 41x15x10 / N38

Table 11: Physics of underwater searching MP 41x15x10 / N38

1. Sliding resistance

2. Steel thickness impact

3. Power loss vs temp

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

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Induction

Other proposals

RM R7 SUPER - 13000 Gs / N52 - magnetic distributor

SM 25x250 [2xM8] / N42 - magnetic separator

UI 45x13x6 [C321] / N38 - badge holder

UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

Pros as well as cons of Nd2Fe14B magnets.

Pros

Disadvantages

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

What influences lifting capacity in practice

Safety rules for work with neodymium magnets

Magnet fragility

Medical implants

Fire risk

Allergy Warning

Product not for children

Respect the power

Hand protection

Data carriers

Compass and GPS

Demagnetization risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (force vs distance) - characteristics
MP 41x15x10 / N38

Table 2: Vertical load (wall)
MP 41x15x10 / N38

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 41x15x10 / N38

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 41x15x10 / N38

Table 5: Thermal stability (stability) - power drop
MP 41x15x10 / N38

Table 6: Two magnets (attraction) - forces in the system
MP 41x15x10 / N38

Table 7: Safety (HSE) (electronics) - warnings
MP 41x15x10 / N38

Table 8: Impact energy (cracking risk) - warning
MP 41x15x10 / N38

Table 9: Anti-corrosion coating durability
MP 41x15x10 / N38

Table 10: Electrical data (P_c)
MP 41x15x10 / N38

Table 11: Physics of underwater searching
MP 41x15x10 / N38

Pros as well as cons of Nd₂Fe₁₄B magnets.