MW 10x20 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010007
GTIN/EAN: 5906301810063
Diameter Ø
10 mm [±0,1 mm]
Height
20 mm [±0,1 mm]
Weight
11.78 g
Magnetization Direction
↑ axial
Load capacity
2.23 kg / 21.88 N
Magnetic Induction
600.73 mT / 6007 Gs
Coating
[NiCuNi] Nickel
4.92 ZŁ with VAT / pcs + price for transport
4.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - MW 10x20 / N38 - cylindrical magnet
Specification / characteristics - MW 10x20 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010007 |
| GTIN/EAN | 5906301810063 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 20 mm [±0,1 mm] |
| Weight | 11.78 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.23 kg / 21.88 N |
| Magnetic Induction ~ ? | 600.73 mT / 6007 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 - technical parameters
Presented information constitute the result of a mathematical simulation. Results rely on models for the material Nd2Fe14B. Actual performance may differ from theoretical values. Please consider these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs distance) - characteristics
MW 10x20 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6003 Gs
600.3 mT
|
2.23 kg / 4.92 lbs
2230.0 g / 21.9 N
|
warning |
| 1 mm |
4815 Gs
481.5 mT
|
1.44 kg / 3.16 lbs
1435.1 g / 14.1 N
|
safe |
| 2 mm |
3743 Gs
374.3 mT
|
0.87 kg / 1.91 lbs
867.2 g / 8.5 N
|
safe |
| 3 mm |
2869 Gs
286.9 mT
|
0.51 kg / 1.12 lbs
509.3 g / 5.0 N
|
safe |
| 5 mm |
1696 Gs
169.6 mT
|
0.18 kg / 0.39 lbs
177.9 g / 1.7 N
|
safe |
| 10 mm |
570 Gs
57.0 mT
|
0.02 kg / 0.04 lbs
20.1 g / 0.2 N
|
safe |
| 15 mm |
256 Gs
25.6 mT
|
0.00 kg / 0.01 lbs
4.1 g / 0.0 N
|
safe |
| 20 mm |
137 Gs
13.7 mT
|
0.00 kg / 0.00 lbs
1.2 g / 0.0 N
|
safe |
| 30 mm |
54 Gs
5.4 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
safe |
| 50 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Vertical force (wall)
MW 10x20 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.45 kg / 0.98 lbs
446.0 g / 4.4 N
|
| 1 mm | Stal (~0.2) |
0.29 kg / 0.63 lbs
288.0 g / 2.8 N
|
| 2 mm | Stal (~0.2) |
0.17 kg / 0.38 lbs
174.0 g / 1.7 N
|
| 3 mm | Stal (~0.2) |
0.10 kg / 0.22 lbs
102.0 g / 1.0 N
|
| 5 mm | Stal (~0.2) |
0.04 kg / 0.08 lbs
36.0 g / 0.4 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: Wall mounting (sliding) - vertical pull
MW 10x20 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.67 kg / 1.47 lbs
669.0 g / 6.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.45 kg / 0.98 lbs
446.0 g / 4.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.22 kg / 0.49 lbs
223.0 g / 2.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.12 kg / 2.46 lbs
1115.0 g / 10.9 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 10x20 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.22 kg / 0.49 lbs
223.0 g / 2.2 N
|
| 1 mm |
|
0.56 kg / 1.23 lbs
557.5 g / 5.5 N
|
| 2 mm |
|
1.12 kg / 2.46 lbs
1115.0 g / 10.9 N
|
| 3 mm |
|
1.67 kg / 3.69 lbs
1672.5 g / 16.4 N
|
| 5 mm |
|
2.23 kg / 4.92 lbs
2230.0 g / 21.9 N
|
| 10 mm |
|
2.23 kg / 4.92 lbs
2230.0 g / 21.9 N
|
| 11 mm |
|
2.23 kg / 4.92 lbs
2230.0 g / 21.9 N
|
| 12 mm |
|
2.23 kg / 4.92 lbs
2230.0 g / 21.9 N
|
Table 5: Thermal resistance (stability) - power drop
MW 10x20 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.23 kg / 4.92 lbs
2230.0 g / 21.9 N
|
OK |
| 40 °C | -2.2% |
2.18 kg / 4.81 lbs
2180.9 g / 21.4 N
|
OK |
| 60 °C | -4.4% |
2.13 kg / 4.70 lbs
2131.9 g / 20.9 N
|
OK |
| 80 °C | -6.6% |
2.08 kg / 4.59 lbs
2082.8 g / 20.4 N
|
|
| 100 °C | -28.8% |
1.59 kg / 3.50 lbs
1587.8 g / 15.6 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 10x20 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
17.45 kg / 38.46 lbs
6 140 Gs
|
2.62 kg / 5.77 lbs
2617 g / 25.7 N
|
N/A |
| 1 mm |
14.15 kg / 31.20 lbs
10 813 Gs
|
2.12 kg / 4.68 lbs
2123 g / 20.8 N
|
12.74 kg / 28.08 lbs
~0 Gs
|
| 2 mm |
11.23 kg / 24.75 lbs
9 631 Gs
|
1.68 kg / 3.71 lbs
1684 g / 16.5 N
|
10.11 kg / 22.28 lbs
~0 Gs
|
| 3 mm |
8.78 kg / 19.35 lbs
8 515 Gs
|
1.32 kg / 2.90 lbs
1316 g / 12.9 N
|
7.90 kg / 17.41 lbs
~0 Gs
|
| 5 mm |
5.21 kg / 11.48 lbs
6 559 Gs
|
0.78 kg / 1.72 lbs
781 g / 7.7 N
|
4.69 kg / 10.33 lbs
~0 Gs
|
| 10 mm |
1.39 kg / 3.07 lbs
3 391 Gs
|
0.21 kg / 0.46 lbs
209 g / 2.0 N
|
1.25 kg / 2.76 lbs
~0 Gs
|
| 20 mm |
0.16 kg / 0.35 lbs
1 140 Gs
|
0.02 kg / 0.05 lbs
24 g / 0.2 N
|
0.14 kg / 0.31 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 lbs
165 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
107 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
74 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
53 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
39 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
30 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 10x20 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 6.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.5 cm |
| Remote | 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) | 1.0 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 10x20 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
13.95 km/h
(3.88 m/s)
|
0.09 J | |
| 30 mm |
24.03 km/h
(6.68 m/s)
|
0.26 J | |
| 50 mm |
31.03 km/h
(8.62 m/s)
|
0.44 J | |
| 100 mm |
43.88 km/h
(12.19 m/s)
|
0.88 J |
Table 9: Surface protection spec
MW 10x20 / 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 (Pc)
MW 10x20 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 223 Mx | 52.2 µWb |
| Pc Coefficient | 1.21 | High (Stable) |
Table 11: Physics of underwater searching
MW 10x20 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.23 kg | Standard |
| Water (riverbed) |
2.55 kg
(+0.32 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet retains only a fraction of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) severely weakens the holding force.
3. Heat tolerance
*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) = 1.21
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.
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 |
View also proposals
Advantages as well as disadvantages of neodymium magnets.
Advantages
- They retain magnetic properties for around ten years – the drop is just ~1% (in theory),
- Magnets very well resist against loss of magnetization caused by external fields,
- A magnet with a shiny silver surface is more attractive,
- Neodymium magnets achieve maximum magnetic induction on a small surface, which increases force concentration,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
- In view of the possibility of flexible forming and customization to individualized solutions, neodymium magnets can be produced in a broad palette of shapes and sizes, which expands the range of possible applications,
- Significant place in future technologies – they are utilized in magnetic memories, brushless drives, medical equipment, as well as multitasking production systems.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
- NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Due to limitations in creating nuts and complicated shapes in magnets, we recommend using a housing - magnetic mount.
- Health risk resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. Additionally, small elements of these magnets can disrupt the diagnostic process medical after entering the body.
- Due to expensive raw materials, their price is relatively high,
Lifting parameters
Magnetic strength at its maximum – what contributes to it?
- using a sheet made of high-permeability steel, functioning as a ideal flux conductor
- with a thickness no less than 10 mm
- with a plane free of scratches
- under conditions of ideal adhesion (metal-to-metal)
- for force acting at a right angle (pull-off, not shear)
- at ambient temperature room level
Key elements affecting lifting force
- Clearance – existence of any layer (rust, tape, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Steel thickness – too thin plate does not accept the full field, causing part of the flux to be lost into the air.
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may attract less.
- Smoothness – full contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.
Safe handling of NdFeB magnets
Conscious usage
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Pinching danger
Mind your fingers. Two large magnets will join instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!
Demagnetization risk
Avoid heat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).
Precision electronics
A strong magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets close to a smartphone to avoid damaging the sensors.
Fire warning
Powder produced during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.
Allergy Warning
Certain individuals have a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Extended handling can result in dermatitis. We recommend use protective gloves.
Data carriers
Do not bring magnets near a purse, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Eye protection
Protect your eyes. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.
Medical interference
Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.
Danger to the youngest
Only for adults. Tiny parts can be swallowed, causing serious injuries. Store away from children and animals.
