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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Technical details - 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 |
Engineering analysis of the product - report
These information constitute the outcome of a engineering simulation. Values are based on models for the material Nd2Fe14B. Real-world conditions might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap when designing systems.
Table 1: Static pull force (force vs gap) - power drop
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
|
medium risk |
| 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: Sliding capacity (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 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: 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 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: Working in heat (material behavior) - 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: Magnet-Magnet interaction (repulsion) - field range
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 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: Safety (HSE) (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 |
| Mechanical watch | 20 Gs (2.0 mT) | 4.5 cm |
| Phone / Smartphone | 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 (cracking risk) - 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: Construction 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. Wall mount (shear)
*Note: On a vertical wall, the magnet holds merely ~20% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Heat tolerance
*For N38 grade, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.21
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages as well as disadvantages of neodymium magnets.
Advantages
- They do not lose power, even after nearly 10 years – the drop in strength is only ~1% (theoretically),
- Magnets very well defend themselves against demagnetization caused by foreign field sources,
- A magnet with a shiny nickel surface looks better,
- Magnets have excellent magnetic induction on the outer side,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of custom modeling as well as modifying to complex requirements,
- Significant place in future technologies – they are used in hard drives, motor assemblies, precision medical tools, also multitasking production systems.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Disadvantages
- At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- We suggest a housing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated forms.
- Possible danger to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small elements of these magnets can complicate diagnosis medical when they are in the body.
- Due to neodymium price, their price is higher than average,
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what it depends on?
- using a base made of mild steel, serving as a ideal flux conductor
- possessing a massiveness of minimum 10 mm to avoid saturation
- with a surface perfectly flat
- without any insulating layer between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- in neutral thermal conditions
What influences lifting capacity in practice
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped to the other side.
- Chemical composition of the base – low-carbon steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
- Smoothness – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the load capacity.
Warnings
Eye protection
Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Electronic devices
Avoid bringing magnets near a purse, computer, or screen. The magnetic field can destroy these devices and erase data from cards.
Maximum temperature
Regular neodymium magnets (grade N) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.
Swallowing risk
Product intended for adults. Small elements can be swallowed, leading to severe trauma. Keep away from children and animals.
Do not drill into magnets
Drilling and cutting of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Safe operation
Be careful. Rare earth magnets attract from a distance and snap with huge force, often quicker than you can move away.
Metal Allergy
It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, avoid touching magnets with bare hands and choose coated magnets.
Keep away from electronics
GPS units and mobile phones are highly susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.
Medical implants
Life threat: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Bodily injuries
Pinching hazard: The attraction force is so immense that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.
