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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 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

Engineering analysis of the assembly - data

These data represent the direct effect of a engineering analysis. Values are based on algorithms for the class Nd2Fe14B. Operational performance might slightly differ from theoretical values. Please consider these data as a supplementary guide when designing systems.

Table 1: Static force (pull vs gap) - interaction chart
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 pounds
17120.0 g / 167.9 N
dangerous!
1 mm 1997 Gs
199.7 mT
16.11 kg / 35.52 pounds
16110.1 g / 158.0 N
dangerous!
2 mm 1923 Gs
192.3 mT
14.93 kg / 32.91 pounds
14925.7 g / 146.4 N
dangerous!
3 mm 1838 Gs
183.8 mT
13.64 kg / 30.06 pounds
13636.4 g / 133.8 N
dangerous!
5 mm 1648 Gs
164.8 mT
10.97 kg / 24.18 pounds
10968.0 g / 107.6 N
dangerous!
10 mm 1161 Gs
116.1 mT
5.44 kg / 12.00 pounds
5444.8 g / 53.4 N
warning
15 mm 775 Gs
77.5 mT
2.43 kg / 5.35 pounds
2427.5 g / 23.8 N
warning
20 mm 515 Gs
51.5 mT
1.07 kg / 2.36 pounds
1071.1 g / 10.5 N
weak grip
30 mm 242 Gs
24.2 mT
0.24 kg / 0.52 pounds
236.8 g / 2.3 N
weak grip
50 mm 73 Gs
7.3 mT
0.02 kg / 0.05 pounds
21.8 g / 0.2 N
weak grip

Table 2: Vertical force (vertical surface)
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 pounds
3424.0 g / 33.6 N
1 mm Stal (~0.2) 3.22 kg / 7.10 pounds
3222.0 g / 31.6 N
2 mm Stal (~0.2) 2.99 kg / 6.58 pounds
2986.0 g / 29.3 N
3 mm Stal (~0.2) 2.73 kg / 6.01 pounds
2728.0 g / 26.8 N
5 mm Stal (~0.2) 2.19 kg / 4.84 pounds
2194.0 g / 21.5 N
10 mm Stal (~0.2) 1.09 kg / 2.40 pounds
1088.0 g / 10.7 N
15 mm Stal (~0.2) 0.49 kg / 1.07 pounds
486.0 g / 4.8 N
20 mm Stal (~0.2) 0.21 kg / 0.47 pounds
214.0 g / 2.1 N
30 mm Stal (~0.2) 0.05 kg / 0.11 pounds
48.0 g / 0.5 N
50 mm Stal (~0.2) 0.00 kg / 0.01 pounds
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 pounds
5136.0 g / 50.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
3.42 kg / 7.55 pounds
3424.0 g / 33.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
1.71 kg / 3.77 pounds
1712.0 g / 16.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
8.56 kg / 18.87 pounds
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 pounds
856.0 g / 8.4 N
1 mm
13%
2.14 kg / 4.72 pounds
2140.0 g / 21.0 N
2 mm
25%
4.28 kg / 9.44 pounds
4280.0 g / 42.0 N
3 mm
38%
6.42 kg / 14.15 pounds
6420.0 g / 63.0 N
5 mm
63%
10.70 kg / 23.59 pounds
10700.0 g / 105.0 N
10 mm
100%
17.12 kg / 37.74 pounds
17120.0 g / 167.9 N
11 mm
100%
17.12 kg / 37.74 pounds
17120.0 g / 167.9 N
12 mm
100%
17.12 kg / 37.74 pounds
17120.0 g / 167.9 N

Table 5: Thermal resistance (stability) - thermal limit
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 pounds
17120.0 g / 167.9 N
OK
40 °C -2.2% 16.74 kg / 36.91 pounds
16743.4 g / 164.3 N
OK
60 °C -4.4% 16.37 kg / 36.08 pounds
16366.7 g / 160.6 N
80 °C -6.6% 15.99 kg / 35.25 pounds
15990.1 g / 156.9 N
100 °C -28.8% 12.19 kg / 26.87 pounds
12189.4 g / 119.6 N

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

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 22.24 kg / 49.03 pounds
3 569 Gs
3.34 kg / 7.35 pounds
3336 g / 32.7 N
N/A
1 mm 21.62 kg / 47.67 pounds
4 061 Gs
3.24 kg / 7.15 pounds
3243 g / 31.8 N
19.46 kg / 42.90 pounds
~0 Gs
2 mm 20.93 kg / 46.14 pounds
3 995 Gs
3.14 kg / 6.92 pounds
3139 g / 30.8 N
18.84 kg / 41.52 pounds
~0 Gs
3 mm 20.18 kg / 44.49 pounds
3 923 Gs
3.03 kg / 6.67 pounds
3027 g / 29.7 N
18.16 kg / 40.04 pounds
~0 Gs
5 mm 18.56 kg / 40.93 pounds
3 763 Gs
2.78 kg / 6.14 pounds
2785 g / 27.3 N
16.71 kg / 36.83 pounds
~0 Gs
10 mm 14.25 kg / 31.41 pounds
3 296 Gs
2.14 kg / 4.71 pounds
2137 g / 21.0 N
12.82 kg / 28.27 pounds
~0 Gs
20 mm 7.07 kg / 15.59 pounds
2 322 Gs
1.06 kg / 2.34 pounds
1061 g / 10.4 N
6.37 kg / 14.03 pounds
~0 Gs
50 mm 0.64 kg / 1.40 pounds
697 Gs
0.10 kg / 0.21 pounds
96 g / 0.9 N
0.57 kg / 1.26 pounds
~0 Gs
60 mm 0.31 kg / 0.68 pounds
484 Gs
0.05 kg / 0.10 pounds
46 g / 0.5 N
0.28 kg / 0.61 pounds
~0 Gs
70 mm 0.16 kg / 0.35 pounds
346 Gs
0.02 kg / 0.05 pounds
24 g / 0.2 N
0.14 kg / 0.31 pounds
~0 Gs
80 mm 0.08 kg / 0.19 pounds
254 Gs
0.01 kg / 0.03 pounds
13 g / 0.1 N
0.08 kg / 0.17 pounds
~0 Gs
90 mm 0.05 kg / 0.11 pounds
191 Gs
0.01 kg / 0.02 pounds
7 g / 0.1 N
0.04 kg / 0.10 pounds
~0 Gs
100 mm 0.03 kg / 0.06 pounds
147 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
0.03 kg / 0.06 pounds
~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
Mobile device 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: Impact energy (kinetic energy) - warning
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: Corrosion resistance
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: Construction 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: 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%
Warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
1. Shear force

*Warning: On a vertical surface, the magnet holds only a fraction of its nominal pull.

2. Plate thickness effect

*Thin metal sheet (e.g. computer case) severely limits the holding force.

3. Temperature resistance

*For N38 material, the max working temp is 80°C.

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

chart generated for the permeance coefficient Pc (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 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.

Technical specification and ecology
Elemental analysis
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Sustainability
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
Force (pull)

Magnetic Induction

Other deals

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 hard but breakable and inelastic. When tightening the screw, you must maintain caution. We recommend tightening manually with a screwdriver, not an impact driver, because too much pressure will cause the ring to crack. The flat screw head should evenly press the magnet. Remember: cracking during assembly results from material properties, not a product defect.
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 can be damaged when tightening the screw, which will become a corrosion focus. 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. If the magnet does not have a chamfer (cone), we recommend using a screw with a flat or cylindrical head, or possibly using a washer. Always check that the screw head is not larger than the outer diameter of the magnet (36.2 mm), so it doesn't protrude beyond the outline.
This model is characterized by dimensions Ø36.2x7.5 mm and a weight of 56.3 g. 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.
The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). When ordering a larger quantity, magnets are usually packed in stacks, where they are already naturally paired.

Advantages and disadvantages of Nd2Fe14B magnets.

Pros

Besides their exceptional field intensity, neodymium magnets offer the following advantages:
  • Their strength is durable, and after around 10 years it drops only by ~1% (according to research),
  • They do not lose their magnetic properties even under external field action,
  • In other words, due to the aesthetic surface of nickel, the element becomes visually attractive,
  • Magnets are distinguished by exceptionally strong magnetic induction on the outer side,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of exact machining and optimizing to specific conditions,
  • Significant place in electronics industry – they are commonly used in HDD drives, electromotive mechanisms, medical devices, also multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in miniature devices

Limitations

What to avoid - cons of neodymium magnets: tips and applications.
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited ability of making nuts in the magnet and complex forms - preferred is a housing - magnet mounting.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical when they are in the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

Breakaway strength of the magnet in ideal conditionswhat contributes to it?

The force parameter is a result of laboratory testing executed under the following configuration:
  • using a plate made of low-carbon steel, functioning as a circuit closing element
  • with a thickness minimum 10 mm
  • characterized by smoothness
  • without the slightest insulating layer between the magnet and steel
  • for force applied at a right angle (in the magnet axis)
  • at room temperature

Determinants of practical lifting force of a magnet

Effective lifting capacity is influenced by working environment parameters, including (from priority):
  • Clearance – existence of foreign body (rust, tape, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Material composition – not every steel attracts identically. Alloy additives worsen the interaction with the magnet.
  • Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • 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).

Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate decreases the holding force.

H&S for magnets
Do not underestimate power

Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.

GPS Danger

Navigation devices and mobile phones are highly susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Fragile material

Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Data carriers

Device Safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).

This is not a toy

Neodymium magnets are not suitable for play. Accidental ingestion of multiple magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates urgent medical intervention.

Dust is flammable

Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Avoid contact if allergic

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop working with magnets and use protective gear.

Heat sensitivity

Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. Damage is permanent.

Pacemakers

Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Bone fractures

Large magnets can break fingers in a fraction of a second. Never put your hand betwixt two strong magnets.

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