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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Detailed specification - 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 simulation of the magnet - report
These data constitute the outcome of a physical calculation. Values rely on algorithms for the class Nd2Fe14B. Actual parameters may differ from theoretical values. Use these data as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs distance) - characteristics
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 (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: Thermal resistance (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: Magnet-Magnet interaction (repulsion) - field range
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: 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: Impact energy (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: Anti-corrosion coating 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 (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: Physics of underwater searching
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 surface, the magnet holds merely a fraction of its max power.
2. Steel thickness impact
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Temperature resistance
*For N38 material, 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.
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 |
See also proposals
Pros and cons of Nd2Fe14B magnets.
Pros
- They retain full power for nearly 10 years – the loss is just ~1% (according to analyses),
- Neodymium magnets prove to be remarkably resistant to demagnetization caused by external interference,
- By applying a lustrous layer of gold, the element gains an aesthetic look,
- The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of accurate forming and adapting to precise applications,
- Key role in modern industrial fields – they are utilized in mass storage devices, electromotive mechanisms, medical devices, and modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in miniature devices
Cons
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 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
- We recommend casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated forms.
- Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that small components of these devices are able to complicate diagnosis medical after entering the body.
- Due to neodymium price, their price is higher than average,
Lifting parameters
Best holding force of the magnet in ideal parameters – what it depends on?
- using a plate made of mild steel, functioning as a magnetic yoke
- possessing a thickness of at least 10 mm to ensure full flux closure
- characterized by smoothness
- under conditions of ideal adhesion (metal-to-metal)
- for force applied at a right angle (pull-off, not shear)
- at room temperature
Magnet lifting force in use – key factors
- Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Material type – the best choice is high-permeability steel. Stainless steels may attract less.
- Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.
Safe handling of NdFeB magnets
Keep away from computers
Very strong magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Operating temperature
Keep cool. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
Flammability
Mechanical processing of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.
Fragile material
Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.
Warning for heart patients
For implant holders: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to work with the magnets.
Danger to the youngest
Product intended for adults. Small elements pose a choking risk, causing intestinal necrosis. Store away from kids and pets.
Immense force
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Skin irritation risks
Some people have a hypersensitivity to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact might lead to a rash. It is best to wear safety gloves.
Finger safety
Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!
Phone sensors
Note: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a separation from your mobile, device, and navigation systems.
