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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Physical properties - 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 product - report
Presented data represent the result of a engineering calculation. Results rely on models for the class Nd2Fe14B. Real-world performance may differ. Please consider these data as a supplementary guide when designing systems.
Table 1: Static pull force (pull vs distance) - characteristics
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
|
strong |
| 1 mm |
2767 Gs
276.7 mT
|
8.12 kg / 17.89 LBS
8116.0 g / 79.6 N
|
strong |
| 2 mm |
2538 Gs
253.8 mT
|
6.82 kg / 15.05 LBS
6824.4 g / 66.9 N
|
strong |
| 3 mm |
2295 Gs
229.5 mT
|
5.58 kg / 12.30 LBS
5580.8 g / 54.7 N
|
strong |
| 5 mm |
1818 Gs
181.8 mT
|
3.50 kg / 7.73 LBS
3504.7 g / 34.4 N
|
strong |
| 10 mm |
938 Gs
93.8 mT
|
0.93 kg / 2.06 LBS
933.4 g / 9.2 N
|
weak grip |
| 15 mm |
492 Gs
49.2 mT
|
0.26 kg / 0.57 LBS
257.0 g / 2.5 N
|
weak grip |
| 20 mm |
277 Gs
27.7 mT
|
0.08 kg / 0.18 LBS
81.6 g / 0.8 N
|
weak grip |
| 30 mm |
108 Gs
10.8 mT
|
0.01 kg / 0.03 LBS
12.4 g / 0.1 N
|
weak grip |
| 50 mm |
29 Gs
2.9 mT
|
0.00 kg / 0.00 LBS
0.9 g / 0.0 N
|
weak grip |
Table 2: Sliding force (vertical surface)
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 (sliding) - behavior on slippery surfaces
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 (substrate influence) - sheet metal selection
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: Working in heat (material behavior) - resistance threshold
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: Magnet-Magnet interaction (repulsion) - field collision
MW 22x6 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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: Hazards (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 |
| Timepiece | 20 Gs (2.0 mT) | 6.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.5 cm |
| Remote | 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: Dynamics (cracking risk) - collision effects
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: Coating parameters (durability)
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 (Flux)
MW 22x6 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 12 337 Mx | 123.4 µWb |
| Pc Coefficient | 0.37 | Low (Flat) |
Table 11: Submerged application
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. Wall mount (shear)
*Note: On a vertical surface, the magnet holds merely ~20% of its nominal pull.
2. Steel thickness impact
*Thin steel (e.g. computer case) severely limits the holding force.
3. Temperature resistance
*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
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.
Chemical composition
| 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 |
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Pros as well as cons of neodymium magnets.
Pros
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- Neodymium magnets are characterized by highly resistant to demagnetization caused by external interference,
- In other words, due to the reflective layer of silver, the element gains visual value,
- They feature high magnetic induction at the operating surface, which increases their power,
- 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 forming and adjusting to specific requirements,
- Key role in advanced technology sectors – they are commonly used in data components, electric motors, precision medical tools, also industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Cons
- At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
- Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small components of these devices are able to complicate diagnosis medical in case of swallowing.
- With mass production the cost of neodymium magnets is a challenge,
Lifting parameters
Maximum lifting capacity of the magnet – what it depends on?
- with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- with a cross-section minimum 10 mm
- characterized by smoothness
- with direct contact (no coatings)
- under vertical application of breakaway force (90-degree angle)
- at conditions approx. 20°C
Lifting capacity in practice – influencing factors
- Gap between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of nominal force).
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
- Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
- Surface quality – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently damage the magnet.
Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the load capacity.
Warnings
Machining danger
Powder produced during grinding of magnets is combustible. Do not drill into magnets unless you are an expert.
Protective goggles
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.
This is not a toy
Neodymium magnets are not toys. Swallowing a few magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.
Pinching danger
Large magnets can smash fingers in a fraction of a second. Never place your hand between two attracting surfaces.
Caution required
Handle magnets consciously. Their huge power can shock even professionals. Stay alert and respect their power.
Heat warning
Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.
Threat to navigation
Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.
Implant safety
For implant holders: Powerful magnets disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.
Electronic devices
Data protection: Strong magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).
Nickel coating and allergies
Some people have a sensitization to Ni, which is the common plating for neodymium magnets. Frequent touching can result in an allergic reaction. It is best to use protective gloves.
