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MP 36.2x11/6x7.5 / 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: 1-6500
Rating: 5

ring magnet

Catalog no 030248

GTIN/EAN: 5906301812241

5.00

Diameter

36.2 mm [±0,1 mm]

internal diameter Ø

11/6 mm [±0,1 mm]

Height

7.5 mm [±0,1 mm]

Weight

56.3 g

Magnetization Direction

↑ axial

Load capacity

17.12 kg / 167.95 N

Magnetic Induction

237.29 mT / 2373 Gs

Coating

[NiCuNi] Nickel

35.01 ZŁ with VAT / pcs + price for transport

28.46 ZŁ net + 23% VAT / pcs

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MP 36.2x11/6x7.5 / N38 - ring magnet

Specification / characteristics MP 36.2x11/6x7.5 / N38 - ring magnet

properties

properties	values
Cat. no.	030248
GTIN/EAN	5906301812241
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	36.2 mm [±0,1 mm]
internal diameter Ø	11/6 mm [±0,1 mm]
Height	7.5 mm [±0,1 mm]
Weight	56.3 g
Magnetization Direction	↑ axial
Load capacity ~ ?	17.12 kg / 167.95 N
Magnetic Induction ~ ?	237.29 mT / 2373 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 36.2x11/6x7.5 / 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 magnet - technical parameters

Presented information are the result of a physical simulation. Results rely on algorithms for the class Nd₂Fe₁₄B. Operational conditions might slightly deviate from the simulation results. Use these calculations as a reference point when designing systems.

Table 1: Static force (force vs distance) - power drop
MP 36.2x11/6x7.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2059 Gs 205.9 mT	17.12 kg / 17120.0 g 167.9 N	dangerous!
1 mm	1997 Gs 199.7 mT	16.11 kg / 16110.1 g 158.0 N	dangerous!
2 mm	1923 Gs 192.3 mT	14.93 kg / 14925.7 g 146.4 N	dangerous!
3 mm	1838 Gs 183.8 mT	13.64 kg / 13636.4 g 133.8 N	dangerous!
5 mm	1648 Gs 164.8 mT	10.97 kg / 10968.0 g 107.6 N	dangerous!
10 mm	1161 Gs 116.1 mT	5.44 kg / 5444.8 g 53.4 N	warning
15 mm	775 Gs 77.5 mT	2.43 kg / 2427.5 g 23.8 N	warning
20 mm	515 Gs 51.5 mT	1.07 kg / 1071.1 g 10.5 N	safe
30 mm	242 Gs 24.2 mT	0.24 kg / 236.8 g 2.3 N	safe
50 mm	73 Gs 7.3 mT	0.02 kg / 21.8 g 0.2 N	safe

Grip strength decreases significantly with every mm of gap. Keep in mind that even a microscopic distance (e.g., contamination, varnish, veneer) significantly diminishes the holding power. Magnetic products hold most effectively at the point of direct contact; distance kills the force. Observe how rapidly the load capacity drop, when the magnet does not adhere directly to the metal substrate. When designing the assembly, avoid additional spacers.

Table 2: Shear Load (Vertical Surface)
MP 36.2x11/6x7.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	3.42 kg / 3424.0 g 33.6 N
1 mm	Stal (~0.2)	3.22 kg / 3222.0 g 31.6 N
2 mm	Stal (~0.2)	2.99 kg / 2986.0 g 29.3 N
3 mm	Stal (~0.2)	2.73 kg / 2728.0 g 26.8 N
5 mm	Stal (~0.2)	2.19 kg / 2194.0 g 21.5 N
10 mm	Stal (~0.2)	1.09 kg / 1088.0 g 10.7 N
15 mm	Stal (~0.2)	0.49 kg / 486.0 g 4.8 N
20 mm	Stal (~0.2)	0.21 kg / 214.0 g 2.1 N
30 mm	Stal (~0.2)	0.05 kg / 48.0 g 0.5 N
50 mm	Stal (~0.2)	0.00 kg / 4.0 g 0.0 N

The table below presents the approximate holding capacity required to cause the downward movement of the magnet downwards against a vertical metal surface (assuming typical friction coefficient). This parameter is relative to the distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MP 36.2x11/6x7.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	5.14 kg / 5136.0 g 50.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	3.42 kg / 3424.0 g 33.6 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	1.71 kg / 1712.0 g 16.8 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	8.56 kg / 8560.0 g 84.0 N

When placing a element on a vertical surface (e.g., a fridge), it you can count on just approx. 20%-30% of nominal attraction strength. Gravitational force as well as a low friction coefficient influence the fact that holders move down easier than they detach. Want to create a hanger? Note that the shear force is significantly lower than the maximum static pull force. On a painted metal, the holder will slide down under a significantly smaller weight. Application of an anti-slip pad can effectively increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 36.2x11/6x7.5 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	5%	0.86 kg / 856.0 g 8.4 N
1 mm	13%	2.14 kg / 2140.0 g 21.0 N
2 mm	25%	4.28 kg / 4280.0 g 42.0 N
5 mm	63%	10.70 kg / 10700.0 g 105.0 N
10 mm	100%	17.12 kg / 17120.0 g 167.9 N

A thin sheet is unable to conduct the full magnetic flux, which squanders power of the magnet. Should you install a neodymium to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To utilize the maximum of this neodymium's power, you need a suitably thick piece of steel. The material oversaturation means that on thin elements (e.g., thin profiles), the holder works worse. We suggest choosing the steel thickness based on the following data.

Table 5: Thermal stability (stability) - thermal limit
MP 36.2x11/6x7.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	17.12 kg / 17120.0 g 167.9 N	OK
40 °C	-2.2%	16.74 kg / 16743.4 g 164.3 N	OK
60 °C	-4.4%	16.37 kg / 16366.7 g 160.6 N
80 °C	-6.6%	15.99 kg / 15990.1 g 156.9 N
100 °C	-28.8%	12.19 kg / 12189.4 g 119.6 N

Standard neodymium magnets lose parameters above the temperature limit. Watch out for overheating – excessive heat can permanently demagnetize this product. With increasing heat, the neodymium's force temporarily drops. Avoid using this product close to heaters exceeding its operating temperature limit. Too high temperature will cause permanent loss of magnetism.

*Important note: Temperature resistance is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (low permeance coefficient) are more susceptible to demagnetization sooner compared to rod magnets. Warning indicator in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MP 36.2x11/6x7.5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	22.24 kg / 22240 g 218.2 N 3 569 Gs	N/A
1 mm	21.62 kg / 21621 g 212.1 N 4 061 Gs	19.46 kg / 19459 g 190.9 N ~0 Gs
2 mm	20.93 kg / 20928 g 205.3 N 3 995 Gs	18.84 kg / 18835 g 184.8 N ~0 Gs
3 mm	20.18 kg / 20180 g 198.0 N 3 923 Gs	18.16 kg / 18162 g 178.2 N ~0 Gs
5 mm	18.56 kg / 18564 g 182.1 N 3 763 Gs	16.71 kg / 16708 g 163.9 N ~0 Gs
10 mm	14.25 kg / 14248 g 139.8 N 3 296 Gs	12.82 kg / 12823 g 125.8 N ~0 Gs
20 mm	7.07 kg / 7073 g 69.4 N 2 322 Gs	6.37 kg / 6366 g 62.4 N ~0 Gs
50 mm	0.64 kg / 637 g 6.2 N 697 Gs	0.57 kg / 573 g 5.6 N ~0 Gs

Two magnets interact from a significantly greater distance than a neodymium and metal combination. The setup of magnet-to-magnet generates a stronger field and a further horizon of action. Designing a solid fastener? Apply two magnets instead of one magnet and a striker plate. Remember that when connecting a pair of magnets, the pinch force is huge. The levitation is marginally weaker than the attraction, but still impressive.
*Field value in repulsion mode reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).

Table 7: Hazards (implants) - warnings
MP 36.2x11/6x7.5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	13.5 cm
Hearing aid	10 Gs (1.0 mT)	10.5 cm
Mechanical watch	20 Gs (2.0 mT)	8.5 cm
Mobile device	40 Gs (4.0 mT)	6.5 cm
Car key	50 Gs (5.0 mT)	6.0 cm
Payment card	400 Gs (40.0 mT)	2.5 cm
HDD hard drive	600 Gs (60.0 mT)	2.0 cm

Powerful magnet radiation is a real danger to electronics and medical implants. These magnets generate a field that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation passes through tissues and glass. Increased vigilance must be exercised by people with hearing aids and drug dispensers. The risk also applies to: mechanical watches, remotes, speakers, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Collisions (cracking risk) - collision effects
MP 36.2x11/6x7.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.79 km/h (5.78 m/s)	0.94 J
30 mm	30.72 km/h (8.53 m/s)	2.05 J
50 mm	39.36 km/h (10.93 m/s)	3.36 J
100 mm	55.61 km/h (15.45 m/s)	6.72 J

Neodymium magnets are very brittle – a collision with steel can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can trigger coating fragments or painful pinches to fingers. Always hold the magnet during bringing near metal so it doesn't hit with great force against the metal. A collision at high speed ends with a crack of the magnet. Use safety goggles when working with powerful specimens.

Table 9: Surface protection spec
MP 36.2x11/6x7.5 / 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)

Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction Data (Flux)
MP 36.2x11/6x7.5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	21 038 Mx	210.4 µWb
P_c Coefficient	0.26	Low (Flat)

Total magnetic flux emitted by the magnet pole. Key data in coil applications as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Physics of underwater searching
MP 36.2x11/6x7.5 / N38

Environment	Effective steel pull	Effect
Air (land)	17.12 kg	Standard
Water (riverbed)	19.60 kg (+2.48 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!

Contrary to myths, water does not block the magnetic field. 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 merely ~20% of its perpendicular strength.

2. Steel thickness impact

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

3. Power loss vs temp

*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) = 0.26

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 specification and ecology

Chemical composition

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

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: 030248-2025

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The ring-shaped magnet MP 36.2x11/6x7.5 / N38 is created for mechanical fastening, where glue might fail or be insufficient. 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 36.2x11/6x7.5 / 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 flexible washer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.

Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. In the place of the mounting hole, the coating is thinner and easily scratched when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.

A screw or bolt with a thread diameter smaller than 11/6 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Always check that the screw head is not larger than the outer diameter of the magnet (36.2 mm), so it doesn't protrude beyond the outline.

It is a magnetic ring with a diameter of 36.2 mm and thickness 7.5 mm. The pulling force of this model is an impressive 17.12 kg, which translates to 167.95 N in newtons. The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 11/6 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.

Pros as well as cons of rare earth magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:

Their magnetic field remains stable, and after approximately ten years it drops only by ~1% (according to research),
Magnets perfectly resist against loss of magnetization caused by foreign field sources,
By applying a lustrous layer of silver, the element presents an nice look,
Magnetic induction on the working part of the magnet turns out to be extremely intense,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Possibility of individual modeling as well as optimizing to complex requirements,
Wide application in modern industrial fields – they are used in computer drives, motor assemblies, medical devices, and multitasking production systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:

To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
Limited possibility of creating threads in the magnet and complex shapes - recommended is cover - mounting mechanism.
Potential hazard related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child health protection. Additionally, small elements of these magnets can be problematic in diagnostics medical after entering the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Maximum lifting capacity of the magnet – what contributes to it?

Breakaway force was defined for optimal configuration, including:

on a base made of mild steel, effectively closing the magnetic flux
with a thickness no less than 10 mm
with a plane free of scratches
under conditions of ideal adhesion (metal-to-metal)
for force applied at a right angle (in the magnet axis)
at ambient temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

Please note that the magnet holding may be lower subject to the following factors, starting with the most relevant:

Air gap (betwixt the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
Direction of force – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Metal type – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
Surface quality – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.

Warnings

Power loss in heat

Keep cool. NdFeB magnets are susceptible to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Safe distance

Device Safety: Strong magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Flammability

Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Phone sensors

Be aware: rare earth magnets generate a field that interferes with sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.

Pacemakers

People with a heart stimulator have to keep an large gap from magnets. The magnetic field can disrupt the operation of the life-saving device.

Do not underestimate power

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.

No play value

Adult use only. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of children and animals.

Nickel allergy

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, avoid touching magnets with bare hands and opt for coated magnets.

Risk of cracking

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Crushing force

Danger of trauma: The pulling power is so great that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

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

MP 36.2x11/6x7.5 / N38 - ring magnet

Not sure where to buy?

MP 36.2x11/6x7.5 / N38 - ring magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical simulation of the magnet - technical parameters

1. Shear force

2. Steel thickness impact

3. Power loss vs temp

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

Chemical composition

Environmental data

Magnet Pull Force

Magnetic Induction

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Pros as well as cons of rare earth magnets.

Advantages

Cons

Lifting parameters

Maximum lifting capacity of the magnet – what contributes to it?

What influences lifting capacity in practice

Power loss in heat

Safe distance

Flammability

Phone sensors

Pacemakers

Do not underestimate power

No play value

Nickel allergy

Risk of cracking

Crushing force

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C