MW 22x6 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010047
GTIN/EAN: 5906301810469
Diameter Ø
22 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
17.11 g
Magnetization Direction
↑ axial
Load capacity
9.33 kg / 91.51 N
Magnetic Induction
296.78 mT / 2968 Gs
Coating
[NiCuNi] Nickel
6.11 ZŁ with VAT / pcs + price for transport
4.97 ZŁ net + 23% VAT / pcs
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Technical of the product - MW 22x6 / N38 - cylindrical magnet
Specification / characteristics - MW 22x6 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010047 |
| GTIN/EAN | 5906301810469 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 22 mm [±0,1 mm] |
| Height | 6 mm [±0,1 mm] |
| Weight | 17.11 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 9.33 kg / 91.51 N |
| Magnetic Induction ~ ? | 296.78 mT / 2968 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 simulation of the magnet - technical parameters
Presented information constitute the direct effect of a mathematical calculation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs gap) - power drop
MW 22x6 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2967 Gs
296.7 mT
|
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
|
warning |
| 1 mm |
2767 Gs
276.7 mT
|
8.12 kg / 17.89 lbs
8116.0 g / 79.6 N
|
warning |
| 2 mm |
2538 Gs
253.8 mT
|
6.82 kg / 15.05 lbs
6824.4 g / 66.9 N
|
warning |
| 3 mm |
2295 Gs
229.5 mT
|
5.58 kg / 12.30 lbs
5580.8 g / 54.7 N
|
warning |
| 5 mm |
1818 Gs
181.8 mT
|
3.50 kg / 7.73 lbs
3504.7 g / 34.4 N
|
warning |
| 10 mm |
938 Gs
93.8 mT
|
0.93 kg / 2.06 lbs
933.4 g / 9.2 N
|
low risk |
| 15 mm |
492 Gs
49.2 mT
|
0.26 kg / 0.57 lbs
257.0 g / 2.5 N
|
low risk |
| 20 mm |
277 Gs
27.7 mT
|
0.08 kg / 0.18 lbs
81.6 g / 0.8 N
|
low risk |
| 30 mm |
108 Gs
10.8 mT
|
0.01 kg / 0.03 lbs
12.4 g / 0.1 N
|
low risk |
| 50 mm |
29 Gs
2.9 mT
|
0.00 kg / 0.00 lbs
0.9 g / 0.0 N
|
low risk |
Table 2: Shear capacity (wall)
MW 22x6 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.87 kg / 4.11 lbs
1866.0 g / 18.3 N
|
| 1 mm | Stal (~0.2) |
1.62 kg / 3.58 lbs
1624.0 g / 15.9 N
|
| 2 mm | Stal (~0.2) |
1.36 kg / 3.01 lbs
1364.0 g / 13.4 N
|
| 3 mm | Stal (~0.2) |
1.12 kg / 2.46 lbs
1116.0 g / 10.9 N
|
| 5 mm | Stal (~0.2) |
0.70 kg / 1.54 lbs
700.0 g / 6.9 N
|
| 10 mm | Stal (~0.2) |
0.19 kg / 0.41 lbs
186.0 g / 1.8 N
|
| 15 mm | Stal (~0.2) |
0.05 kg / 0.11 lbs
52.0 g / 0.5 N
|
| 20 mm | Stal (~0.2) |
0.02 kg / 0.04 lbs
16.0 g / 0.2 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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 (shearing) - vertical pull
MW 22x6 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.80 kg / 6.17 lbs
2799.0 g / 27.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.87 kg / 4.11 lbs
1866.0 g / 18.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.93 kg / 2.06 lbs
933.0 g / 9.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.67 kg / 10.28 lbs
4665.0 g / 45.8 N
|
Table 4: Material efficiency (saturation) - power losses
MW 22x6 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.93 kg / 2.06 lbs
933.0 g / 9.2 N
|
| 1 mm |
|
2.33 kg / 5.14 lbs
2332.5 g / 22.9 N
|
| 2 mm |
|
4.67 kg / 10.28 lbs
4665.0 g / 45.8 N
|
| 3 mm |
|
7.00 kg / 15.43 lbs
6997.5 g / 68.6 N
|
| 5 mm |
|
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
|
| 10 mm |
|
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
|
| 11 mm |
|
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
|
| 12 mm |
|
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
|
Table 5: Thermal stability (stability) - thermal limit
MW 22x6 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
9.33 kg / 20.57 lbs
9330.0 g / 91.5 N
|
OK |
| 40 °C | -2.2% |
9.12 kg / 20.12 lbs
9124.7 g / 89.5 N
|
OK |
| 60 °C | -4.4% |
8.92 kg / 19.66 lbs
8919.5 g / 87.5 N
|
|
| 80 °C | -6.6% |
8.71 kg / 19.21 lbs
8714.2 g / 85.5 N
|
|
| 100 °C | -28.8% |
6.64 kg / 14.65 lbs
6643.0 g / 65.2 N
|
Table 6: Two magnets (repulsion) - field range
MW 22x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
20.63 kg / 45.48 lbs
4 566 Gs
|
3.09 kg / 6.82 lbs
3095 g / 30.4 N
|
N/A |
| 1 mm |
19.34 kg / 42.63 lbs
5 745 Gs
|
2.90 kg / 6.40 lbs
2901 g / 28.5 N
|
17.40 kg / 38.37 lbs
~0 Gs
|
| 2 mm |
17.95 kg / 39.57 lbs
5 535 Gs
|
2.69 kg / 5.93 lbs
2692 g / 26.4 N
|
16.15 kg / 35.61 lbs
~0 Gs
|
| 3 mm |
16.52 kg / 36.42 lbs
5 310 Gs
|
2.48 kg / 5.46 lbs
2478 g / 24.3 N
|
14.87 kg / 32.78 lbs
~0 Gs
|
| 5 mm |
13.69 kg / 30.18 lbs
4 834 Gs
|
2.05 kg / 4.53 lbs
2053 g / 20.1 N
|
12.32 kg / 27.16 lbs
~0 Gs
|
| 10 mm |
7.75 kg / 17.09 lbs
3 637 Gs
|
1.16 kg / 2.56 lbs
1162 g / 11.4 N
|
6.97 kg / 15.38 lbs
~0 Gs
|
| 20 mm |
2.06 kg / 4.55 lbs
1 877 Gs
|
0.31 kg / 0.68 lbs
310 g / 3.0 N
|
1.86 kg / 4.10 lbs
~0 Gs
|
| 50 mm |
0.07 kg / 0.15 lbs
336 Gs
|
0.01 kg / 0.02 lbs
10 g / 0.1 N
|
0.06 kg / 0.13 lbs
~0 Gs
|
| 60 mm |
0.03 kg / 0.06 lbs
217 Gs
|
0.00 kg / 0.01 lbs
4 g / 0.0 N
|
0.02 kg / 0.05 lbs
~0 Gs
|
| 70 mm |
0.01 kg / 0.03 lbs
147 Gs
|
0.00 kg / 0.00 lbs
2 g / 0.0 N
|
0.01 kg / 0.03 lbs
~0 Gs
|
| 80 mm |
0.01 kg / 0.01 lbs
104 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 90 mm |
0.00 kg / 0.01 lbs
76 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 / 0.00 lbs
57 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) - warnings
MW 22x6 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 9.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 6.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.5 cm |
| Car key | 50 Gs (5.0 mT) | 4.5 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (cracking risk) - warning
MW 22x6 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.98 km/h
(6.94 m/s)
|
0.41 J | |
| 30 mm |
40.82 km/h
(11.34 m/s)
|
1.10 J | |
| 50 mm |
52.66 km/h
(14.63 m/s)
|
1.83 J | |
| 100 mm |
74.47 km/h
(20.69 m/s)
|
3.66 J |
Table 9: Corrosion resistance
MW 22x6 / 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 (Pc)
MW 22x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 12 337 Mx | 123.4 µWb |
| Pc Coefficient | 0.37 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 22x6 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 9.33 kg | Standard |
| Water (riverbed) |
10.68 kg
(+1.35 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical wall, the magnet retains only ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) significantly weakens 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) = 0.37
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also deals
Advantages as well as disadvantages of neodymium magnets.
Advantages
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
- Magnets perfectly resist against demagnetization caused by ambient magnetic noise,
- A magnet with a shiny gold surface has an effective appearance,
- Magnetic induction on the working part of the magnet is maximum,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Thanks to freedom in designing and the ability to modify to individual projects,
- Universal use in future technologies – they find application in mass storage devices, drive modules, medical devices, as well as industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in small systems
Disadvantages
- They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
- Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and 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 start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
- Limited possibility of producing nuts in the magnet and complex shapes - recommended is a housing - mounting mechanism.
- Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum holding power of the magnet – what contributes to it?
- on a base made of structural steel, perfectly concentrating the magnetic field
- with a thickness no less than 10 mm
- with a surface free of scratches
- with zero gap (no paint)
- during pulling in a direction perpendicular to the mounting surface
- in neutral thermal conditions
Practical aspects of lifting capacity – factors
- Air gap (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
- Angle of force application – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
- Metal type – different alloys attracts identically. Alloy additives worsen the interaction with the magnet.
- Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.
Lifting capacity was assessed by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with NdFeB magnets
Conscious usage
Before use, read the rules. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.
Compass and GPS
A strong magnetic field interferes with the operation of compasses in phones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.
Swallowing risk
NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which constitutes a direct threat to life and requires urgent medical intervention.
Data carriers
Intense magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.
Medical implants
Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.
Thermal limits
Watch the temperature. Exposing the magnet to high heat will destroy its properties and strength.
Dust explosion hazard
Dust generated during cutting of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Finger safety
Risk of injury: The pulling power is so immense that it can cause blood blisters, crushing, and broken bones. Use thick gloves.
Avoid contact if allergic
It is widely known that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands or opt for encased magnets.
Magnet fragility
Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them breaking into small pieces.
