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

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 with VAT / pcs + price for transport

28.46 ZŁ net + 23% VAT / pcs

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Technical parameters of the product - 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

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 product - report

Presented information are the direct effect of a physical calculation. Results were calculated on models for the material Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Please consider these data as a supplementary guide during assembly planning.

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

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2059 Gs
205.9 mT
17.12 kg / 37.74 LBS
17120.0 g / 167.9 N
dangerous!
1 mm 1997 Gs
199.7 mT
16.11 kg / 35.52 LBS
16110.1 g / 158.0 N
dangerous!
2 mm 1923 Gs
192.3 mT
14.93 kg / 32.91 LBS
14925.7 g / 146.4 N
dangerous!
3 mm 1838 Gs
183.8 mT
13.64 kg / 30.06 LBS
13636.4 g / 133.8 N
dangerous!
5 mm 1648 Gs
164.8 mT
10.97 kg / 24.18 LBS
10968.0 g / 107.6 N
dangerous!
10 mm 1161 Gs
116.1 mT
5.44 kg / 12.00 LBS
5444.8 g / 53.4 N
warning
15 mm 775 Gs
77.5 mT
2.43 kg / 5.35 LBS
2427.5 g / 23.8 N
warning
20 mm 515 Gs
51.5 mT
1.07 kg / 2.36 LBS
1071.1 g / 10.5 N
low risk
30 mm 242 Gs
24.2 mT
0.24 kg / 0.52 LBS
236.8 g / 2.3 N
low risk
50 mm 73 Gs
7.3 mT
0.02 kg / 0.05 LBS
21.8 g / 0.2 N
low risk

Table 2: Vertical force (wall)
MP 36.2x11/6x7.5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 3.42 kg / 7.55 LBS
3424.0 g / 33.6 N
1 mm Stal (~0.2) 3.22 kg / 7.10 LBS
3222.0 g / 31.6 N
2 mm Stal (~0.2) 2.99 kg / 6.58 LBS
2986.0 g / 29.3 N
3 mm Stal (~0.2) 2.73 kg / 6.01 LBS
2728.0 g / 26.8 N
5 mm Stal (~0.2) 2.19 kg / 4.84 LBS
2194.0 g / 21.5 N
10 mm Stal (~0.2) 1.09 kg / 2.40 LBS
1088.0 g / 10.7 N
15 mm Stal (~0.2) 0.49 kg / 1.07 LBS
486.0 g / 4.8 N
20 mm Stal (~0.2) 0.21 kg / 0.47 LBS
214.0 g / 2.1 N
30 mm Stal (~0.2) 0.05 kg / 0.11 LBS
48.0 g / 0.5 N
50 mm Stal (~0.2) 0.00 kg / 0.01 LBS
4.0 g / 0.0 N

Table 3: Wall mounting (sliding) - vertical pull
MP 36.2x11/6x7.5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
5.14 kg / 11.32 LBS
5136.0 g / 50.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.42 kg / 7.55 LBS
3424.0 g / 33.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.71 kg / 3.77 LBS
1712.0 g / 16.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
8.56 kg / 18.87 LBS
8560.0 g / 84.0 N

Table 4: Material efficiency (substrate influence) - sheet metal selection
MP 36.2x11/6x7.5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
0.86 kg / 1.89 LBS
856.0 g / 8.4 N
1 mm
13%
2.14 kg / 4.72 LBS
2140.0 g / 21.0 N
2 mm
25%
4.28 kg / 9.44 LBS
4280.0 g / 42.0 N
3 mm
38%
6.42 kg / 14.15 LBS
6420.0 g / 63.0 N
5 mm
63%
10.70 kg / 23.59 LBS
10700.0 g / 105.0 N
10 mm
100%
17.12 kg / 37.74 LBS
17120.0 g / 167.9 N
11 mm
100%
17.12 kg / 37.74 LBS
17120.0 g / 167.9 N
12 mm
100%
17.12 kg / 37.74 LBS
17120.0 g / 167.9 N

Table 5: Working in heat (material behavior) - resistance threshold
MP 36.2x11/6x7.5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 17.12 kg / 37.74 LBS
17120.0 g / 167.9 N
OK
40 °C -2.2% 16.74 kg / 36.91 LBS
16743.4 g / 164.3 N
OK
60 °C -4.4% 16.37 kg / 36.08 LBS
16366.7 g / 160.6 N
80 °C -6.6% 15.99 kg / 35.25 LBS
15990.1 g / 156.9 N
100 °C -28.8% 12.19 kg / 26.87 LBS
12189.4 g / 119.6 N

Table 6: Two magnets (attraction) - field range
MP 36.2x11/6x7.5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 22.24 kg / 49.03 LBS
3 569 Gs
3.34 kg / 7.35 LBS
3336 g / 32.7 N
N/A
1 mm 21.62 kg / 47.67 LBS
4 061 Gs
3.24 kg / 7.15 LBS
3243 g / 31.8 N
19.46 kg / 42.90 LBS
~0 Gs
2 mm 20.93 kg / 46.14 LBS
3 995 Gs
3.14 kg / 6.92 LBS
3139 g / 30.8 N
18.84 kg / 41.52 LBS
~0 Gs
3 mm 20.18 kg / 44.49 LBS
3 923 Gs
3.03 kg / 6.67 LBS
3027 g / 29.7 N
18.16 kg / 40.04 LBS
~0 Gs
5 mm 18.56 kg / 40.93 LBS
3 763 Gs
2.78 kg / 6.14 LBS
2785 g / 27.3 N
16.71 kg / 36.83 LBS
~0 Gs
10 mm 14.25 kg / 31.41 LBS
3 296 Gs
2.14 kg / 4.71 LBS
2137 g / 21.0 N
12.82 kg / 28.27 LBS
~0 Gs
20 mm 7.07 kg / 15.59 LBS
2 322 Gs
1.06 kg / 2.34 LBS
1061 g / 10.4 N
6.37 kg / 14.03 LBS
~0 Gs
50 mm 0.64 kg / 1.40 LBS
697 Gs
0.10 kg / 0.21 LBS
96 g / 0.9 N
0.57 kg / 1.26 LBS
~0 Gs
60 mm 0.31 kg / 0.68 LBS
484 Gs
0.05 kg / 0.10 LBS
46 g / 0.5 N
0.28 kg / 0.61 LBS
~0 Gs
70 mm 0.16 kg / 0.35 LBS
346 Gs
0.02 kg / 0.05 LBS
24 g / 0.2 N
0.14 kg / 0.31 LBS
~0 Gs
80 mm 0.08 kg / 0.19 LBS
254 Gs
0.01 kg / 0.03 LBS
13 g / 0.1 N
0.08 kg / 0.17 LBS
~0 Gs
90 mm 0.05 kg / 0.11 LBS
191 Gs
0.01 kg / 0.02 LBS
7 g / 0.1 N
0.04 kg / 0.10 LBS
~0 Gs
100 mm 0.03 kg / 0.06 LBS
147 Gs
0.00 kg / 0.01 LBS
4 g / 0.0 N
0.03 kg / 0.06 LBS
~0 Gs

Table 7: Protective zones (implants) - precautionary measures
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
Phone / Smartphone 40 Gs (4.0 mT) 6.5 cm
Remote 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

Table 8: Dynamics (kinetic energy) - collision effects
MP 36.2x11/6x7.5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
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

Table 9: Anti-corrosion coating durability
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)

Table 10: Electrical data (Flux)
MP 36.2x11/6x7.5 / N38

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

Table 11: Underwater work (magnet fishing)
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%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
1. Vertical hold

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

2. Efficiency vs thickness

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

3. Power loss vs temp

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

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

chart generated for the permeance coefficient Pc (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 Pc (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 Pc 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
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%
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: 030248-2026
Quick Unit Converter
Pulling force

Magnetic Induction

Other products

The ring-shaped magnet MP 36.2x11/6x7.5 / N38 is created for permanent mounting, where glue might fail or be insufficient. 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 17.12 kg works great as a cabinet closure, speaker holder, or mounting element in devices.
This is a crucial issue when working with model MP 36.2x11/6x7.5 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable 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.
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 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. Aesthetic mounting requires selecting the appropriate head size.
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 mounting hole diameter is precisely 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. When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Strengths and weaknesses of neodymium magnets.

Benefits

Apart from their notable holding force, neodymium magnets have these key benefits:
  • They retain magnetic properties for around ten years – the drop is just ~1% (in theory),
  • They retain their magnetic properties even under close interference source,
  • By covering with a lustrous layer of silver, the element has an elegant look,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which allows for strong attraction,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Thanks to freedom in designing and the capacity to adapt to complex applications,
  • Huge importance in modern technologies – they are commonly used in HDD drives, brushless drives, advanced medical instruments, and technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which allows their use in miniature devices

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of creating nuts in the magnet and complex shapes - preferred is a housing - mounting mechanism.
  • Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these magnets can complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Holding force characteristics

Maximum holding power of the magnet – what affects it?

The specified lifting capacity concerns the maximum value, obtained under laboratory conditions, namely:
  • on a plate made of mild steel, optimally conducting the magnetic flux
  • whose thickness reaches at least 10 mm
  • with an ground contact surface
  • without any clearance between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

Holding efficiency impacted by working environment parameters, including (from priority):
  • Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – insufficiently thick sheet does not close the flux, causing part of the flux to be escaped into the air.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface quality – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet and the plate decreases the holding force.

Warnings
Impact on smartphones

A strong magnetic field disrupts the operation of compasses in phones and navigation systems. Do not bring magnets near a device to avoid breaking the sensors.

Material brittleness

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.

Powerful field

Handle with care. Rare earth magnets attract from a distance and connect with huge force, often quicker than you can move away.

Sensitization to coating

A percentage of the population suffer from a contact allergy to Ni, which is the standard coating for neodymium magnets. Prolonged contact may cause an allergic reaction. We suggest wear protective gloves.

Demagnetization risk

Watch the temperature. Heating the magnet to high heat will permanently weaken its properties and strength.

Cards and drives

Avoid bringing magnets close to a wallet, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Fire warning

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

Life threat

Individuals with a ICD should keep an large gap from magnets. The magnetism can stop the functioning of the life-saving device.

Bodily injuries

Big blocks can break fingers instantly. Never place your hand between two strong magnets.

Adults only

Product intended for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Keep out of reach of children and animals.

Danger! Learn more about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98