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
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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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Physical properties - 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 | 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 analysis of the product - report
Presented information constitute the result of a engineering calculation. Results are based on models for the class Nd2Fe14B. Operational performance might slightly differ from theoretical values. Treat these data as a supplementary guide during assembly planning.
Table 1: Static force (pull vs gap) - power drop
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
|
critical level |
| 1 mm |
3823 Gs
382.3 mT
|
12.41 kg / 27.36 LBS
12412.2 g / 121.8 N
|
critical level |
| 2 mm |
3461 Gs
346.1 mT
|
10.18 kg / 22.43 LBS
10175.8 g / 99.8 N
|
critical level |
| 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 force (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: 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: 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) | Sliding 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) - 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 |
| 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 (kinetic energy) - warning
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: 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: 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: Underwater work (magnet fishing)
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 merely a fraction of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically reduces the holding force.
3. Power loss vs temp
*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) = 0.55
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.
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Pros and cons of Nd2Fe14B magnets.
Pros
- They do not lose strength, even over around 10 years – the reduction in power is only ~1% (according to tests),
- Magnets very well defend themselves against demagnetization caused by ambient magnetic noise,
- Thanks to the shimmering finish, the coating of nickel, gold-plated, or silver gives an modern appearance,
- Neodymium magnets deliver maximum magnetic induction on a small surface, which increases force concentration,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Possibility of accurate modeling and optimizing to complex requirements,
- Fundamental importance in future technologies – they are utilized in hard drives, brushless drives, medical devices, and industrial machines.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in producing threads and complicated shapes in magnets, we propose using cover - magnetic mechanism.
- Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
- Due to neodymium price, their price exceeds standard values,
Pull force analysis
Maximum lifting capacity of the magnet – what it depends on?
- with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
- possessing a thickness of min. 10 mm to ensure full flux closure
- with an polished touching surface
- without the slightest insulating layer between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- at room temperature
Lifting capacity in real conditions – factors
- Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Direction of force – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
- Steel thickness – too thin sheet does not close the flux, causing part of the power to be wasted into the air.
- Steel type – low-carbon steel attracts best. Alloy steels reduce magnetic permeability and lifting capacity.
- Base smoothness – the more even the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Thermal environment – heating the magnet causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under parallel forces the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with NdFeB magnets
Danger to pacemakers
Medical warning: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.
Immense force
Handle magnets consciously. Their immense force can shock even experienced users. Be vigilant and do not underestimate their force.
Serious injuries
Protect your hands. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Warning for allergy sufferers
It is widely known that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, prevent touching magnets with bare hands and select encased magnets.
Precision electronics
GPS units and smartphones are highly susceptible to magnetism. Close proximity with a strong magnet can ruin the sensors in your phone.
Data carriers
Do not bring magnets close to a purse, computer, or screen. The magnetism can permanently damage these devices and wipe information from cards.
Magnet fragility
Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Wear goggles.
Do not give to children
Adult use only. Tiny parts can be swallowed, causing intestinal necrosis. Store away from children and animals.
Thermal limits
Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. The loss of strength is permanent.
Machining danger
Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this risks ignition.
