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
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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 analysis of the product - technical parameters
Presented data constitute the result of a engineering analysis. Values rely on algorithms for the material Nd2Fe14B. Actual parameters might slightly deviate from the simulation results. Please consider these data as a supplementary guide for designers.
Table 1: Static force (pull vs gap) - 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 pounds
2230.0 g / 21.9 N
|
warning |
| 1 mm |
4815 Gs
481.5 mT
|
1.44 kg / 3.16 pounds
1435.1 g / 14.1 N
|
low risk |
| 2 mm |
3743 Gs
374.3 mT
|
0.87 kg / 1.91 pounds
867.2 g / 8.5 N
|
low risk |
| 3 mm |
2869 Gs
286.9 mT
|
0.51 kg / 1.12 pounds
509.3 g / 5.0 N
|
low risk |
| 5 mm |
1696 Gs
169.6 mT
|
0.18 kg / 0.39 pounds
177.9 g / 1.7 N
|
low risk |
| 10 mm |
570 Gs
57.0 mT
|
0.02 kg / 0.04 pounds
20.1 g / 0.2 N
|
low risk |
| 15 mm |
256 Gs
25.6 mT
|
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
|
low risk |
| 20 mm |
137 Gs
13.7 mT
|
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
|
low risk |
| 30 mm |
54 Gs
5.4 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
low risk |
| 50 mm |
15 Gs
1.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Shear load (vertical surface)
MW 10x20 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.45 kg / 0.98 pounds
446.0 g / 4.4 N
|
| 1 mm | Stal (~0.2) |
0.29 kg / 0.63 pounds
288.0 g / 2.8 N
|
| 2 mm | Stal (~0.2) |
0.17 kg / 0.38 pounds
174.0 g / 1.7 N
|
| 3 mm | Stal (~0.2) |
0.10 kg / 0.22 pounds
102.0 g / 1.0 N
|
| 5 mm | Stal (~0.2) |
0.04 kg / 0.08 pounds
36.0 g / 0.4 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - 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 pounds
669.0 g / 6.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.45 kg / 0.98 pounds
446.0 g / 4.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.22 kg / 0.49 pounds
223.0 g / 2.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.12 kg / 2.46 pounds
1115.0 g / 10.9 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 10x20 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.22 kg / 0.49 pounds
223.0 g / 2.2 N
|
| 1 mm |
|
0.56 kg / 1.23 pounds
557.5 g / 5.5 N
|
| 2 mm |
|
1.12 kg / 2.46 pounds
1115.0 g / 10.9 N
|
| 3 mm |
|
1.67 kg / 3.69 pounds
1672.5 g / 16.4 N
|
| 5 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
| 10 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
| 11 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
| 12 mm |
|
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 10x20 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.23 kg / 4.92 pounds
2230.0 g / 21.9 N
|
OK |
| 40 °C | -2.2% |
2.18 kg / 4.81 pounds
2180.9 g / 21.4 N
|
OK |
| 60 °C | -4.4% |
2.13 kg / 4.70 pounds
2131.9 g / 20.9 N
|
OK |
| 80 °C | -6.6% |
2.08 kg / 4.59 pounds
2082.8 g / 20.4 N
|
|
| 100 °C | -28.8% |
1.59 kg / 3.50 pounds
1587.8 g / 15.6 N
|
Table 6: Two magnets (repulsion) - field collision
MW 10x20 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
17.45 kg / 38.46 pounds
6 140 Gs
|
2.62 kg / 5.77 pounds
2617 g / 25.7 N
|
N/A |
| 1 mm |
14.15 kg / 31.20 pounds
10 813 Gs
|
2.12 kg / 4.68 pounds
2123 g / 20.8 N
|
12.74 kg / 28.08 pounds
~0 Gs
|
| 2 mm |
11.23 kg / 24.75 pounds
9 631 Gs
|
1.68 kg / 3.71 pounds
1684 g / 16.5 N
|
10.11 kg / 22.28 pounds
~0 Gs
|
| 3 mm |
8.78 kg / 19.35 pounds
8 515 Gs
|
1.32 kg / 2.90 pounds
1316 g / 12.9 N
|
7.90 kg / 17.41 pounds
~0 Gs
|
| 5 mm |
5.21 kg / 11.48 pounds
6 559 Gs
|
0.78 kg / 1.72 pounds
781 g / 7.7 N
|
4.69 kg / 10.33 pounds
~0 Gs
|
| 10 mm |
1.39 kg / 3.07 pounds
3 391 Gs
|
0.21 kg / 0.46 pounds
209 g / 2.0 N
|
1.25 kg / 2.76 pounds
~0 Gs
|
| 20 mm |
0.16 kg / 0.35 pounds
1 140 Gs
|
0.02 kg / 0.05 pounds
24 g / 0.2 N
|
0.14 kg / 0.31 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
165 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
107 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
74 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
53 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
39 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
30 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (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 |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.5 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) | 1.0 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: Corrosion resistance
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: Construction data (Flux)
MW 10x20 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 223 Mx | 52.2 µWb |
| Pc Coefficient | 1.21 | High (Stable) |
Table 11: Hydrostatics and buoyancy
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
*Warning: On a vertical wall, the magnet holds just ~20% of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) severely limits the holding force.
3. Heat tolerance
*For N38 grade, the safety limit 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.
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 offers
Strengths as well as weaknesses of Nd2Fe14B magnets.
Pros
- They retain attractive force for around 10 years – the loss is just ~1% (based on simulations),
- Neodymium magnets are distinguished by highly resistant to demagnetization caused by magnetic disturbances,
- Thanks to the reflective finish, the layer of nickel, gold-plated, or silver gives an clean appearance,
- They show high magnetic induction at the operating surface, making them more effective,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Thanks to the possibility of free forming and adaptation to individualized solutions, magnetic components can be modeled in a variety of shapes and sizes, which amplifies use scope,
- Fundamental importance in advanced technology sectors – they are utilized in mass storage devices, electromotive mechanisms, medical devices, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in compact constructions
Weaknesses
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- Neodymium magnets decrease their power 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
- They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited ability of creating nuts in the magnet and complicated forms - preferred is casing - magnet mounting.
- Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Holding force characteristics
Detachment force of the magnet in optimal conditions – what contributes to it?
- on a base made of mild steel, perfectly concentrating the magnetic field
- possessing a thickness of min. 10 mm to ensure full flux closure
- with a plane cleaned and smooth
- without the slightest air gap between the magnet and steel
- during pulling in a direction perpendicular to the plane
- at temperature room level
What influences lifting capacity in practice
- Distance – the presence of any layer (rust, dirt, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
- Steel thickness – too thin steel causes magnetic saturation, causing part of the flux to be wasted to the other side.
- Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
- Base smoothness – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was determined by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the load capacity.
Precautions when working with NdFeB magnets
This is not a toy
Only for adults. Tiny parts can be swallowed, causing intestinal necrosis. Keep away from children and animals.
Handling guide
Exercise caution. Neodymium magnets act from a long distance and connect with massive power, often faster than you can move away.
Nickel allergy
A percentage of the population have a sensitization to nickel, which is the standard coating for neodymium magnets. Frequent touching can result in an allergic reaction. It is best to use safety gloves.
Beware of splinters
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Do not overheat magnets
Do not overheat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
Safe distance
Do not bring magnets close to a purse, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.
Bone fractures
Risk of injury: The pulling power is so great that it can cause hematomas, crushing, and even bone fractures. Use thick gloves.
Keep away from electronics
Note: neodymium magnets generate a field that interferes with precision electronics. Keep a safe distance from your phone, device, and navigation systems.
Pacemakers
For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.
Flammability
Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.
