MW 18x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010401
GTIN/EAN: 5906301811107
Diameter Ø
18 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
19.09 g
Magnetization Direction
↑ axial
Load capacity
10.76 kg / 105.51 N
Magnetic Induction
460.54 mT / 4605 Gs
Coating
[NiCuNi] Nickel
7.82 ZŁ with VAT / pcs + price for transport
6.36 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical of the product - MW 18x10 / N38 - cylindrical magnet
Specification / characteristics - MW 18x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010401 |
| GTIN/EAN | 5906301811107 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 18 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 19.09 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 10.76 kg / 105.51 N |
| Magnetic Induction ~ ? | 460.54 mT / 4605 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 magnet - report
These values represent the outcome of a mathematical calculation. Values were calculated on algorithms for the material Nd2Fe14B. Actual performance might slightly differ. Treat these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs distance) - power drop
MW 18x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4604 Gs
460.4 mT
|
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
|
critical level |
| 1 mm |
4114 Gs
411.4 mT
|
8.59 kg / 18.94 LBS
8592.4 g / 84.3 N
|
warning |
| 2 mm |
3615 Gs
361.5 mT
|
6.64 kg / 14.63 LBS
6635.0 g / 65.1 N
|
warning |
| 3 mm |
3137 Gs
313.7 mT
|
5.00 kg / 11.01 LBS
4996.2 g / 49.0 N
|
warning |
| 5 mm |
2305 Gs
230.5 mT
|
2.70 kg / 5.95 LBS
2698.6 g / 26.5 N
|
warning |
| 10 mm |
1045 Gs
104.5 mT
|
0.55 kg / 1.22 LBS
555.0 g / 5.4 N
|
weak grip |
| 15 mm |
517 Gs
51.7 mT
|
0.14 kg / 0.30 LBS
135.7 g / 1.3 N
|
weak grip |
| 20 mm |
285 Gs
28.5 mT
|
0.04 kg / 0.09 LBS
41.1 g / 0.4 N
|
weak grip |
| 30 mm |
110 Gs
11.0 mT
|
0.01 kg / 0.01 LBS
6.2 g / 0.1 N
|
weak grip |
| 50 mm |
29 Gs
2.9 mT
|
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
|
weak grip |
Table 2: Vertical capacity (wall)
MW 18x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.15 kg / 4.74 LBS
2152.0 g / 21.1 N
|
| 1 mm | Stal (~0.2) |
1.72 kg / 3.79 LBS
1718.0 g / 16.9 N
|
| 2 mm | Stal (~0.2) |
1.33 kg / 2.93 LBS
1328.0 g / 13.0 N
|
| 3 mm | Stal (~0.2) |
1.00 kg / 2.20 LBS
1000.0 g / 9.8 N
|
| 5 mm | Stal (~0.2) |
0.54 kg / 1.19 LBS
540.0 g / 5.3 N
|
| 10 mm | Stal (~0.2) |
0.11 kg / 0.24 LBS
110.0 g / 1.1 N
|
| 15 mm | Stal (~0.2) |
0.03 kg / 0.06 LBS
28.0 g / 0.3 N
|
| 20 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
8.0 g / 0.1 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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
MW 18x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
3.23 kg / 7.12 LBS
3228.0 g / 31.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.15 kg / 4.74 LBS
2152.0 g / 21.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.08 kg / 2.37 LBS
1076.0 g / 10.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
5.38 kg / 11.86 LBS
5380.0 g / 52.8 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 18x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.54 kg / 1.19 LBS
538.0 g / 5.3 N
|
| 1 mm |
|
1.35 kg / 2.97 LBS
1345.0 g / 13.2 N
|
| 2 mm |
|
2.69 kg / 5.93 LBS
2690.0 g / 26.4 N
|
| 3 mm |
|
4.04 kg / 8.90 LBS
4035.0 g / 39.6 N
|
| 5 mm |
|
6.73 kg / 14.83 LBS
6725.0 g / 66.0 N
|
| 10 mm |
|
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
|
| 11 mm |
|
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
|
| 12 mm |
|
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
|
Table 5: Working in heat (stability) - power drop
MW 18x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
10.76 kg / 23.72 LBS
10760.0 g / 105.6 N
|
OK |
| 40 °C | -2.2% |
10.52 kg / 23.20 LBS
10523.3 g / 103.2 N
|
OK |
| 60 °C | -4.4% |
10.29 kg / 22.68 LBS
10286.6 g / 100.9 N
|
OK |
| 80 °C | -6.6% |
10.05 kg / 22.16 LBS
10049.8 g / 98.6 N
|
|
| 100 °C | -28.8% |
7.66 kg / 16.89 LBS
7661.1 g / 75.2 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 18x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
33.25 kg / 73.30 LBS
5 648 Gs
|
4.99 kg / 10.99 LBS
4987 g / 48.9 N
|
N/A |
| 1 mm |
29.87 kg / 65.85 LBS
8 727 Gs
|
4.48 kg / 9.88 LBS
4480 g / 44.0 N
|
26.88 kg / 59.27 LBS
~0 Gs
|
| 2 mm |
26.55 kg / 58.53 LBS
8 228 Gs
|
3.98 kg / 8.78 LBS
3983 g / 39.1 N
|
23.90 kg / 52.68 LBS
~0 Gs
|
| 3 mm |
23.41 kg / 51.62 LBS
7 727 Gs
|
3.51 kg / 7.74 LBS
3512 g / 34.5 N
|
21.07 kg / 46.46 LBS
~0 Gs
|
| 5 mm |
17.84 kg / 39.33 LBS
6 744 Gs
|
2.68 kg / 5.90 LBS
2676 g / 26.3 N
|
16.06 kg / 35.40 LBS
~0 Gs
|
| 10 mm |
8.34 kg / 18.38 LBS
4 611 Gs
|
1.25 kg / 2.76 LBS
1251 g / 12.3 N
|
7.50 kg / 16.54 LBS
~0 Gs
|
| 20 mm |
1.71 kg / 3.78 LBS
2 091 Gs
|
0.26 kg / 0.57 LBS
257 g / 2.5 N
|
1.54 kg / 3.40 LBS
~0 Gs
|
| 50 mm |
0.05 kg / 0.10 LBS
342 Gs
|
0.01 kg / 0.02 LBS
7 g / 0.1 N
|
0.04 kg / 0.09 LBS
~0 Gs
|
| 60 mm |
0.02 kg / 0.04 LBS
221 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.04 LBS
~0 Gs
|
| 70 mm |
0.01 kg / 0.02 LBS
150 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.01 LBS
106 Gs
|
0.00 kg / 0.00 LBS
1 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.01 LBS
78 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
59 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MW 18x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 9.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 6.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.5 cm |
| Car key | 50 Gs (5.0 mT) | 4.5 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (cracking risk) - warning
MW 18x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.70 km/h
(6.86 m/s)
|
0.45 J | |
| 30 mm |
41.49 km/h
(11.52 m/s)
|
1.27 J | |
| 50 mm |
53.54 km/h
(14.87 m/s)
|
2.11 J | |
| 100 mm |
75.72 km/h
(21.03 m/s)
|
4.22 J |
Table 9: Corrosion resistance
MW 18x10 / 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)
MW 18x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 11 828 Mx | 118.3 µWb |
| Pc Coefficient | 0.63 | High (Stable) |
Table 11: Physics of underwater searching
MW 18x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 10.76 kg | Standard |
| Water (riverbed) |
12.32 kg
(+1.56 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet retains merely ~20% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC 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) = 0.63
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths and weaknesses of rare earth magnets.
Advantages
- They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
- They are extremely resistant to demagnetization induced by external field influence,
- By covering with a shiny layer of nickel, the element acquires an elegant look,
- They feature high magnetic induction at the operating surface, making them more effective,
- 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...
- Thanks to the possibility of flexible molding and adaptation to custom needs, magnetic components can be produced in a broad palette of shapes and sizes, which amplifies use scope,
- Wide application in modern industrial fields – they are used in magnetic memories, motor assemblies, medical devices, and modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in miniature devices
Weaknesses
- 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 strength 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 durability even at temperatures up to 230°C
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
- Due to limitations in creating threads and complex forms in magnets, we recommend using casing - magnetic mount.
- Possible danger to health – tiny shards of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets is economically unviable,
Lifting parameters
Maximum lifting capacity of the magnet – what it depends on?
- using a sheet made of low-carbon steel, functioning as a ideal flux conductor
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by lack of roughness
- without the slightest insulating layer between the magnet and steel
- under perpendicular force vector (90-degree angle)
- at room temperature
Practical lifting capacity: influencing factors
- Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Force direction – 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.
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material composition – different alloys attracts identically. Alloy additives weaken the attraction effect.
- Smoothness – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate lowers the lifting capacity.
Safe handling of NdFeB magnets
Heat sensitivity
Keep cool. NdFeB magnets are susceptible to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).
Data carriers
Do not bring magnets close to a purse, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.
Product not for children
These products are not suitable for play. Eating several magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and requires immediate surgery.
Respect the power
Before starting, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.
Allergy Warning
Some people experience a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Extended handling may cause skin redness. We recommend use protective gloves.
Magnetic interference
A powerful magnetic field disrupts the operation of magnetometers in phones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.
Crushing force
Protect your hands. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!
Machining danger
Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Shattering risk
Despite metallic appearance, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.
Medical implants
People with a pacemaker must maintain an large gap from magnets. The magnetic field can stop the operation of the implant.
