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
Load capacity
14.75 kg / 144.65 N
Magnetic Induction
416.85 mT / 4168 Gs
Coating
[NiCuNi] Nickel
11.30 ZŁ with VAT / pcs + price for transport
9.19 ZŁ net + 23% VAT / pcs
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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 |
|---|---|---|
| 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 magnet - technical parameters
Presented data represent the outcome of a physical simulation. Values rely on algorithms for the class Nd2Fe14B. Actual parameters may differ. Please consider these calculations as a preliminary roadmap when designing systems.
Table 1: Static pull 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
|
crushing |
| 1 mm |
3823 Gs
382.3 mT
|
12.41 kg / 27.36 lbs
12412.2 g / 121.8 N
|
crushing |
| 2 mm |
3461 Gs
346.1 mT
|
10.18 kg / 22.43 lbs
10175.8 g / 99.8 N
|
crushing |
| 3 mm |
3102 Gs
310.2 mT
|
8.17 kg / 18.01 lbs
8171.3 g / 80.2 N
|
medium risk |
| 5 mm |
2434 Gs
243.4 mT
|
5.03 kg / 11.09 lbs
5032.6 g / 49.4 N
|
medium risk |
| 10 mm |
1262 Gs
126.2 mT
|
1.35 kg / 2.98 lbs
1352.7 g / 13.3 N
|
low risk |
| 15 mm |
675 Gs
67.5 mT
|
0.39 kg / 0.85 lbs
387.3 g / 3.8 N
|
low risk |
| 20 mm |
388 Gs
38.8 mT
|
0.13 kg / 0.28 lbs
128.2 g / 1.3 N
|
low risk |
| 30 mm |
157 Gs
15.7 mT
|
0.02 kg / 0.05 lbs
20.9 g / 0.2 N
|
low risk |
| 50 mm |
43 Gs
4.3 mT
|
0.00 kg / 0.00 lbs
1.6 g / 0.0 N
|
low risk |
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 (sliding) - 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: Material efficiency (saturation) - 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: Thermal stability (stability) - thermal limit
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: Two magnets (repulsion) - field collision
MW 22x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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: Hazards (implants) - precautionary measures
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 |
| Timepiece | 20 Gs (2.0 mT) | 7.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 5.5 cm |
| Car key | 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: Dynamics (cracking risk) - collision effects
MW 22x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.22 km/h
(6.73 m/s)
|
0.65 J | |
| 30 mm |
39.77 km/h
(11.05 m/s)
|
1.74 J | |
| 50 mm |
51.30 km/h
(14.25 m/s)
|
2.89 J | |
| 100 mm |
72.54 km/h
(20.15 m/s)
|
5.79 J |
Table 9: Coating parameters (durability)
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: Construction data (Pc)
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. Sliding resistance
*Caution: On a vertical surface, the magnet holds just a fraction of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.
3. Power loss vs temp
*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.
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Pros and cons of rare earth magnets.
Advantages
- They have stable power, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
- They are noted for resistance to demagnetization induced by external field influence,
- Thanks to the reflective finish, the layer of Ni-Cu-Ni, gold-plated, or silver gives an professional appearance,
- Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Considering the potential of flexible molding and adaptation to specialized projects, neodymium magnets can be created in a wide range of shapes and sizes, which makes them more universal,
- Significant place in high-tech industry – they are commonly used in magnetic memories, motor assemblies, medical equipment, and multitasking production systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
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
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (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 extremely resistant to heat
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
- Limited ability of making nuts in the magnet and complicated forms - recommended is casing - mounting mechanism.
- Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products are able to complicate diagnosis medical after entering the body.
- Due to expensive raw materials, their price exceeds standard values,
Lifting parameters
Maximum holding power of the magnet – what affects it?
- on a base made of mild steel, effectively closing the magnetic flux
- with a thickness of at least 10 mm
- with a surface cleaned and smooth
- without any insulating layer between the magnet and steel
- under vertical application of breakaway force (90-degree angle)
- in stable room temperature
Magnet lifting force in use – key factors
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Angle of force application – highest force is available only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
- Base massiveness – too thin steel does not accept the full field, causing part of the flux to be lost into the air.
- Steel type – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and lifting capacity.
- Plate texture – smooth surfaces ensure maximum contact, which improves field saturation. Rough surfaces reduce efficiency.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate reduces the holding force.
Safety rules for work with NdFeB magnets
Allergy Warning
A percentage of the population suffer from a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Frequent touching might lead to skin redness. We suggest use safety gloves.
Protective goggles
Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
Compass and GPS
GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a strong magnet can ruin the internal compass in your phone.
Health Danger
Individuals with a ICD have to maintain an safe separation from magnets. The magnetism can interfere with the functioning of the implant.
Conscious usage
Be careful. Neodymium magnets act from a long distance and snap with massive power, often faster than you can react.
Dust explosion hazard
Fire warning: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.
Protect data
Data protection: Strong magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).
Danger to the youngest
These products are not suitable for play. Swallowing several magnets may result in them pinching intestinal walls, which poses a direct threat to life and requires urgent medical intervention.
Permanent damage
Avoid heat. NdFeB magnets are susceptible to heat. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).
Pinching danger
Danger of trauma: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.
