MW 22x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010046
GTIN/EAN: 5906301810452
- Diameter Ø
- 22 mm [±0,1 mm]
- Height
- 10 mm [±0,1 mm]
- Weight
- 28.51 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
9.19 zł net / pcs
11.30 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Technical details - MW 22x10 / N38 - cylindrical magnet
Specification / characteristics - MW 22x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010046 |
| GTIN/EAN | 5906301810452 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 22 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 28.51 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 14.75 kg / 144.65 N |
| Magnetic Induction ~ ? | 416.85 mT / 4168 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| properties | values | units |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 magnet - report
Presented values are the outcome of a mathematical analysis. Results rely on models for the class Nd2Fe14B. Real-world conditions may differ. Use these data as a preliminary roadmap during assembly planning.
Table 1: Static force (force vs distance) - interaction chart
MW 22x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4167 Gs
416.7 mT
|
14.75 kg / 32.52 lbs
14750.0 g / 144.7 N
|
dangerous! |
| 1 mm |
3823 Gs
382.3 mT
|
12.41 kg / 27.36 lbs
12412.2 g / 121.8 N
|
dangerous! |
| 2 mm |
3461 Gs
346.1 mT
|
10.18 kg / 22.43 lbs
10175.8 g / 99.8 N
|
dangerous! |
| 3 mm |
3102 Gs
310.2 mT
|
8.17 kg / 18.01 lbs
8171.3 g / 80.2 N
|
warning |
| 5 mm |
2434 Gs
243.4 mT
|
5.03 kg / 11.09 lbs
5032.6 g / 49.4 N
|
warning |
| 10 mm |
1262 Gs
126.2 mT
|
1.35 kg / 2.98 lbs
1352.7 g / 13.3 N
|
weak grip |
| 15 mm |
675 Gs
67.5 mT
|
0.39 kg / 0.85 lbs
387.3 g / 3.8 N
|
weak grip |
| 20 mm |
388 Gs
38.8 mT
|
0.13 kg / 0.28 lbs
128.2 g / 1.3 N
|
weak grip |
| 30 mm |
157 Gs
15.7 mT
|
0.02 kg / 0.05 lbs
20.9 g / 0.2 N
|
weak grip |
| 50 mm |
43 Gs
4.3 mT
|
0.00 kg / 0.00 lbs
1.6 g / 0.0 N
|
weak grip |
Table 2: Sliding load (wall)
MW 22x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
2.95 kg / 6.50 lbs
2950.0 g / 28.9 N
|
| 1 mm | Stal (~0.2) |
2.48 kg / 5.47 lbs
2482.0 g / 24.3 N
|
| 2 mm | Stal (~0.2) |
2.04 kg / 4.49 lbs
2036.0 g / 20.0 N
|
| 3 mm | Stal (~0.2) |
1.63 kg / 3.60 lbs
1634.0 g / 16.0 N
|
| 5 mm | Stal (~0.2) |
1.01 kg / 2.22 lbs
1006.0 g / 9.9 N
|
| 10 mm | Stal (~0.2) |
0.27 kg / 0.60 lbs
270.0 g / 2.6 N
|
| 15 mm | Stal (~0.2) |
0.08 kg / 0.17 lbs
78.0 g / 0.8 N
|
| 20 mm | Stal (~0.2) |
0.03 kg / 0.06 lbs
26.0 g / 0.3 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.01 lbs
4.0 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 (shearing) - behavior on slippery surfaces
MW 22x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
4.43 kg / 9.76 lbs
4425.0 g / 43.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
2.95 kg / 6.50 lbs
2950.0 g / 28.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
1.48 kg / 3.25 lbs
1475.0 g / 14.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
7.38 kg / 16.26 lbs
7375.0 g / 72.3 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 22x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.74 kg / 1.63 lbs
737.5 g / 7.2 N
|
| 1 mm |
|
1.84 kg / 4.06 lbs
1843.8 g / 18.1 N
|
| 2 mm |
|
3.69 kg / 8.13 lbs
3687.5 g / 36.2 N
|
| 3 mm |
|
5.53 kg / 12.19 lbs
5531.3 g / 54.3 N
|
| 5 mm |
|
9.22 kg / 20.32 lbs
9218.8 g / 90.4 N
|
| 10 mm |
|
14.75 kg / 32.52 lbs
14750.0 g / 144.7 N
|
| 11 mm |
|
14.75 kg / 32.52 lbs
14750.0 g / 144.7 N
|
| 12 mm |
|
14.75 kg / 32.52 lbs
14750.0 g / 144.7 N
|
Table 5: Working in heat (stability) - resistance threshold
MW 22x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
14.75 kg / 32.52 lbs
14750.0 g / 144.7 N
|
OK |
| 40 °C | -2.2% |
14.43 kg / 31.80 lbs
14425.5 g / 141.5 N
|
OK |
| 60 °C | -4.4% |
14.10 kg / 31.09 lbs
14101.0 g / 138.3 N
|
|
| 80 °C | -6.6% |
13.78 kg / 30.37 lbs
13776.5 g / 135.1 N
|
|
| 100 °C | -28.8% |
10.50 kg / 23.15 lbs
10502.0 g / 103.0 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 22x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
40.70 kg / 89.72 lbs
5 428 Gs
|
6.10 kg / 13.46 lbs
6105 g / 59.9 N
|
N/A |
| 1 mm |
37.49 kg / 82.64 lbs
7 999 Gs
|
5.62 kg / 12.40 lbs
5623 g / 55.2 N
|
33.74 kg / 74.38 lbs
~0 Gs
|
| 2 mm |
34.25 kg / 75.50 lbs
7 645 Gs
|
5.14 kg / 11.33 lbs
5137 g / 50.4 N
|
30.82 kg / 67.95 lbs
~0 Gs
|
| 3 mm |
31.10 kg / 68.56 lbs
7 285 Gs
|
4.66 kg / 10.28 lbs
4664 g / 45.8 N
|
27.99 kg / 61.70 lbs
~0 Gs
|
| 5 mm |
25.22 kg / 55.60 lbs
6 561 Gs
|
3.78 kg / 8.34 lbs
3783 g / 37.1 N
|
22.70 kg / 50.04 lbs
~0 Gs
|
| 10 mm |
13.89 kg / 30.61 lbs
4 868 Gs
|
2.08 kg / 4.59 lbs
2083 g / 20.4 N
|
12.50 kg / 27.55 lbs
~0 Gs
|
| 20 mm |
3.73 kg / 8.23 lbs
2 524 Gs
|
0.56 kg / 1.23 lbs
560 g / 5.5 N
|
3.36 kg / 7.41 lbs
~0 Gs
|
| 50 mm |
0.13 kg / 0.30 lbs
480 Gs
|
0.02 kg / 0.04 lbs
20 g / 0.2 N
|
0.12 kg / 0.27 lbs
~0 Gs
|
| 60 mm |
0.06 kg / 0.13 lbs
314 Gs
|
0.01 kg / 0.02 lbs
9 g / 0.1 N
|
0.05 kg / 0.11 lbs
~0 Gs
|
| 70 mm |
0.03 kg / 0.06 lbs
216 Gs
|
0.00 kg / 0.01 lbs
4 g / 0.0 N
|
0.02 kg / 0.05 lbs
~0 Gs
|
| 80 mm |
0.01 kg / 0.03 lbs
154 Gs
|
0.00 kg / 0.00 lbs
2 g / 0.0 N
|
0.01 kg / 0.03 lbs
~0 Gs
|
| 90 mm |
0.01 kg / 0.02 lbs
114 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 100 mm |
0.00 kg / 0.01 lbs
86 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Safety (HSE) (implants) - warnings
MW 22x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 11.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 9.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 7.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.5 cm |
| Remote | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.0 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 22x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.34 km/h
(6.48 m/s)
|
0.60 J | |
| 30 mm |
24.38 km/h
(6.77 m/s)
|
0.65 J | |
| 50 mm |
24.40 km/h
(6.78 m/s)
|
0.65 J | |
| 100 mm |
24.41 km/h
(6.78 m/s)
|
0.66 J |
Table 9: Surface protection spec
MW 22x10 / 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 (Flux)
MW 22x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 16 172 Mx | 161.7 µWb |
| Pc Coefficient | 0.55 | Low (Flat) |
Table 11: Submerged application
MW 22x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 14.75 kg | Standard |
| Water (riverbed) |
16.89 kg
(+2.14 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical wall, the magnet retains just ~20% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Thermal stability
*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) = 0.55
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Advantages and disadvantages of rare earth magnets.
Advantages
- They do not lose power, even during around ten years – the drop in strength is only ~1% (according to tests),
- They do not lose their magnetic properties even under strong external field,
- By using a reflective layer of silver, the element has an nice look,
- Magnetic induction on the surface of the magnet remains very high,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Possibility of detailed modeling and adapting to defined applications,
- Significant place in advanced technology sectors – they are used in magnetic memories, drive modules, diagnostic systems, as well as technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in miniature devices
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in realizing threads and complicated shapes in magnets, we recommend using casing - magnetic holder.
- Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- on a base made of structural steel, effectively closing the magnetic flux
- whose transverse dimension equals approx. 10 mm
- with a surface perfectly flat
- with total lack of distance (no coatings)
- during pulling in a direction vertical to the plane
- at conditions approx. 20°C
Practical aspects of lifting capacity – factors
- Distance (between the magnet and the plate), because even a very small distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
- Steel thickness – too thin steel causes magnetic saturation, causing part of the flux to be escaped into the air.
- Material composition – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
- Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
- Thermal environment – heating the magnet causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under shearing force the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet and the plate lowers the load capacity.
Safety rules for work with NdFeB magnets
Allergy Warning
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.
Bone fractures
Big blocks can crush fingers instantly. Do not put your hand betwixt two strong magnets.
Dust explosion hazard
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Precision electronics
Remember: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.
Protective goggles
Neodymium magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets leads to them cracking into small pieces.
No play value
These products are not intended for children. Accidental ingestion of multiple magnets may result in them attracting across intestines, which constitutes a severe health hazard and requires urgent medical intervention.
Handling rules
Exercise caution. Neodymium magnets act from a long distance and connect with huge force, often faster than you can react.
Power loss in heat
Do not overheat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).
Keep away from computers
Equipment safety: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).
Medical interference
Medical warning: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.
