MP 10x6x4 / N38 - ring magnet
ring magnet
Catalog no 030179
GTIN/EAN: 5906301811961
Diameter
10 mm [±0,1 mm]
internal diameter Ø
6 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
1.51 g
Magnetization Direction
↑ axial
Load capacity
1.79 kg / 17.55 N
Magnetic Induction
386.91 mT / 3869 Gs
Coating
[NiCuNi] Nickel
0.898 ZŁ with VAT / pcs + price for transport
0.730 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical of the product - MP 10x6x4 / N38 - ring magnet
Specification / characteristics - MP 10x6x4 / N38 - ring magnet
| properties | values |
|---|---|
| Cat. no. | 030179 |
| GTIN/EAN | 5906301811961 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter | 10 mm [±0,1 mm] |
| internal diameter Ø | 6 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 1.51 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.79 kg / 17.55 N |
| Magnetic Induction ~ ? | 386.91 mT / 3869 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 modeling of the product - data
Presented values are the direct effect of a mathematical analysis. Values rely on models for the material Nd2Fe14B. Real-world conditions might slightly differ from theoretical values. Treat these calculations as a preliminary roadmap when designing systems.
Table 1: Static force (force vs gap) - power drop
MP 10x6x4 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6115 Gs
611.5 mT
|
1.79 kg / 3.95 LBS
1790.0 g / 17.6 N
|
safe |
| 1 mm |
4915 Gs
491.5 mT
|
1.16 kg / 2.55 LBS
1156.7 g / 11.3 N
|
safe |
| 2 mm |
3833 Gs
383.3 mT
|
0.70 kg / 1.55 LBS
703.2 g / 6.9 N
|
safe |
| 3 mm |
2949 Gs
294.9 mT
|
0.42 kg / 0.92 LBS
416.3 g / 4.1 N
|
safe |
| 5 mm |
1761 Gs
176.1 mT
|
0.15 kg / 0.33 LBS
148.5 g / 1.5 N
|
safe |
| 10 mm |
612 Gs
61.2 mT
|
0.02 kg / 0.04 LBS
17.9 g / 0.2 N
|
safe |
| 15 mm |
284 Gs
28.4 mT
|
0.00 kg / 0.01 LBS
3.9 g / 0.0 N
|
safe |
| 20 mm |
157 Gs
15.7 mT
|
0.00 kg / 0.00 LBS
1.2 g / 0.0 N
|
safe |
| 30 mm |
64 Gs
6.4 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
safe |
| 50 mm |
19 Gs
1.9 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Slippage load (vertical surface)
MP 10x6x4 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.36 kg / 0.79 LBS
358.0 g / 3.5 N
|
| 1 mm | Stal (~0.2) |
0.23 kg / 0.51 LBS
232.0 g / 2.3 N
|
| 2 mm | Stal (~0.2) |
0.14 kg / 0.31 LBS
140.0 g / 1.4 N
|
| 3 mm | Stal (~0.2) |
0.08 kg / 0.19 LBS
84.0 g / 0.8 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.07 LBS
30.0 g / 0.3 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 10x6x4 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.54 kg / 1.18 LBS
537.0 g / 5.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.36 kg / 0.79 LBS
358.0 g / 3.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.18 kg / 0.39 LBS
179.0 g / 1.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.90 kg / 1.97 LBS
895.0 g / 8.8 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MP 10x6x4 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.18 kg / 0.39 LBS
179.0 g / 1.8 N
|
| 1 mm |
|
0.45 kg / 0.99 LBS
447.5 g / 4.4 N
|
| 2 mm |
|
0.90 kg / 1.97 LBS
895.0 g / 8.8 N
|
| 3 mm |
|
1.34 kg / 2.96 LBS
1342.5 g / 13.2 N
|
| 5 mm |
|
1.79 kg / 3.95 LBS
1790.0 g / 17.6 N
|
| 10 mm |
|
1.79 kg / 3.95 LBS
1790.0 g / 17.6 N
|
| 11 mm |
|
1.79 kg / 3.95 LBS
1790.0 g / 17.6 N
|
| 12 mm |
|
1.79 kg / 3.95 LBS
1790.0 g / 17.6 N
|
Table 5: Working in heat (material behavior) - resistance threshold
MP 10x6x4 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.79 kg / 3.95 LBS
1790.0 g / 17.6 N
|
OK |
| 40 °C | -2.2% |
1.75 kg / 3.86 LBS
1750.6 g / 17.2 N
|
OK |
| 60 °C | -4.4% |
1.71 kg / 3.77 LBS
1711.2 g / 16.8 N
|
OK |
| 80 °C | -6.6% |
1.67 kg / 3.69 LBS
1671.9 g / 16.4 N
|
|
| 100 °C | -28.8% |
1.27 kg / 2.81 LBS
1274.5 g / 12.5 N
|
Table 6: Two magnets (attraction) - field collision
MP 10x6x4 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
12.93 kg / 28.50 LBS
6 169 Gs
|
1.94 kg / 4.27 LBS
1939 g / 19.0 N
|
N/A |
| 1 mm |
10.50 kg / 23.16 LBS
11 025 Gs
|
1.58 kg / 3.47 LBS
1576 g / 15.5 N
|
9.45 kg / 20.84 LBS
~0 Gs
|
| 2 mm |
8.35 kg / 18.41 LBS
9 831 Gs
|
1.25 kg / 2.76 LBS
1253 g / 12.3 N
|
7.52 kg / 16.57 LBS
~0 Gs
|
| 3 mm |
6.55 kg / 14.43 LBS
8 703 Gs
|
0.98 kg / 2.17 LBS
982 g / 9.6 N
|
5.89 kg / 12.99 LBS
~0 Gs
|
| 5 mm |
3.91 kg / 8.63 LBS
6 729 Gs
|
0.59 kg / 1.29 LBS
587 g / 5.8 N
|
3.52 kg / 7.76 LBS
~0 Gs
|
| 10 mm |
1.07 kg / 2.36 LBS
3 522 Gs
|
0.16 kg / 0.35 LBS
161 g / 1.6 N
|
0.96 kg / 2.13 LBS
~0 Gs
|
| 20 mm |
0.13 kg / 0.29 LBS
1 223 Gs
|
0.02 kg / 0.04 LBS
19 g / 0.2 N
|
0.12 kg / 0.26 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 LBS
194 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 LBS
129 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 LBS
91 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
66 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
50 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
39 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MP 10x6x4 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 9.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 5.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Collisions (cracking risk) - collision effects
MP 10x6x4 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
34.94 km/h
(9.71 m/s)
|
0.07 J | |
| 30 mm |
60.15 km/h
(16.71 m/s)
|
0.21 J | |
| 50 mm |
77.64 km/h
(21.57 m/s)
|
0.35 J | |
| 100 mm |
109.80 km/h
(30.50 m/s)
|
0.70 J |
Table 9: Surface protection spec
MP 10x6x4 / 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 (Pc)
MP 10x6x4 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 017 Mx | 40.2 µWb |
| Pc Coefficient | 1.44 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MP 10x6x4 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.79 kg | Standard |
| Water (riverbed) |
2.05 kg
(+0.26 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet retains just approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Temperature resistance
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.44
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.
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 |
Other deals
Advantages as well as disadvantages of neodymium magnets.
Strengths
- Their power is durable, and after around 10 years it drops only by ~1% (according to research),
- They are noted for resistance to demagnetization induced by external magnetic fields,
- A magnet with a shiny nickel surface has an effective appearance,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for functioning at temperatures approaching 230°C and above...
- Thanks to the potential of free forming and adaptation to custom solutions, neodymium magnets can be created in a broad palette of shapes and sizes, which makes them more universal,
- Wide application in advanced technology sectors – they find application in data components, motor assemblies, precision medical tools, as well as industrial machines.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Weaknesses
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power 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
- They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited ability of making threads in the magnet and complex forms - recommended is cover - magnet mounting.
- Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that small elements of these devices are able to be problematic in diagnostics medical after entering the body.
- With large orders the cost of neodymium magnets can be a barrier,
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what it depends on?
- using a plate made of high-permeability steel, acting as a magnetic yoke
- possessing a thickness of minimum 10 mm to avoid saturation
- with a surface cleaned and smooth
- without the slightest air gap between the magnet and steel
- under axial force direction (90-degree angle)
- at room temperature
Impact of factors on magnetic holding capacity in practice
- Gap (between the magnet and the plate), because even a very small clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or debris).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Chemical composition of the base – mild steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
- Surface condition – ground elements ensure maximum contact, which improves force. Uneven metal reduce efficiency.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.
Safe handling of neodymium magnets
Allergic reactions
It is widely known that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, prevent touching magnets with bare hands and opt for versions in plastic housing.
Magnet fragility
Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. Eye protection is mandatory.
Medical implants
For implant holders: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.
Dust is flammable
Mechanical processing of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.
This is not a toy
NdFeB magnets are not intended for children. Eating a few magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires urgent medical intervention.
Impact on smartphones
A strong magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Maintain magnets near a device to avoid damaging the sensors.
Powerful field
Use magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and respect their power.
Serious injuries
Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying everything in their path. Be careful!
Cards and drives
Powerful magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.
Do not overheat magnets
Control the heat. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.
