MP 36.2x11/6x7.5 / N38 - ring magnet
ring magnet
Catalog no 030248
GTIN/EAN: 5906301812241
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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Technical parameters of the product - MP 36.2x11/6x7.5 / N38 - ring magnet
Specification / characteristics - MP 36.2x11/6x7.5 / N38 - ring magnet
| properties | values |
|---|---|
| Cat. no. | 030248 |
| GTIN/EAN | 5906301812241 |
| Production/Distribution | Dhit sp. z o.o. |
| 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
| 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 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 |
|
0.86 kg / 1.89 LBS
856.0 g / 8.4 N
|
| 1 mm |
|
2.14 kg / 4.72 LBS
2140.0 g / 21.0 N
|
| 2 mm |
|
4.28 kg / 9.44 LBS
4280.0 g / 42.0 N
|
| 3 mm |
|
6.42 kg / 14.15 LBS
6420.0 g / 63.0 N
|
| 5 mm |
|
10.70 kg / 23.59 LBS
10700.0 g / 105.0 N
|
| 10 mm |
|
17.12 kg / 37.74 LBS
17120.0 g / 167.9 N
|
| 11 mm |
|
17.12 kg / 37.74 LBS
17120.0 g / 167.9 N
|
| 12 mm |
|
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% |
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.
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 |
Other products
Strengths and weaknesses of neodymium magnets.
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
- 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?
- 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
- 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.
