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 |
Physical simulation of the product - data
These information constitute the result of a engineering calculation. Results are based on algorithms for the class Nd2Fe14B. Operational performance may deviate from the simulation results. Use these calculations as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs gap) - 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
|
dangerous! |
| 1 mm |
3823 Gs
382.3 mT
|
12.41 kg / 27.36 lbs
12412.2 g / 121.8 N
|
dangerous! |
| 2 mm |
3461 Gs
346.1 mT
|
10.18 kg / 22.43 lbs
10175.8 g / 99.8 N
|
dangerous! |
| 3 mm |
3102 Gs
310.2 mT
|
8.17 kg / 18.01 lbs
8171.3 g / 80.2 N
|
strong |
| 5 mm |
2434 Gs
243.4 mT
|
5.03 kg / 11.09 lbs
5032.6 g / 49.4 N
|
strong |
| 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: Slippage hold (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: Wall mounting (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: Steel thickness (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: Two magnets (attraction) - 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: Safety (HSE) (electronics) - 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 |
| Timepiece | 20 Gs (2.0 mT) | 7.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 5.5 cm |
| Remote | 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 (kinetic energy) - 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: Electrical 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: 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. Wall mount (shear)
*Warning: On a vertical wall, the magnet holds merely ~20% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) significantly limits the holding force.
3. Thermal stability
*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.
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% |
Sustainability
| 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 rare earth magnets.
Strengths
- They have unchanged lifting capacity, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
- They are extremely resistant to demagnetization induced by external magnetic fields,
- A magnet with a metallic gold surface is more attractive,
- They show high magnetic induction at the operating surface, which affects their effectiveness,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
- Thanks to versatility in designing and the ability to adapt to complex applications,
- Versatile presence in innovative solutions – they are utilized in hard drives, motor assemblies, precision medical tools, as well as multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- They are prone to damage 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
- NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening 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 very resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We recommend cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
- Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these products can be problematic in diagnostics medical when they are in the body.
- With large orders the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting capacity of the magnet – what it depends on?
- on a block made of structural steel, effectively closing the magnetic flux
- with a cross-section no less than 10 mm
- with a surface cleaned and smooth
- without the slightest insulating layer between the magnet and steel
- during pulling in a direction perpendicular to the plane
- in neutral thermal conditions
What influences lifting capacity in practice
- Distance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds much less (often approx. 20-30% of nominal force).
- Steel thickness – insufficiently thick sheet does not accept the full field, causing part of the flux to be lost to the other side.
- Metal type – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
- Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.
H&S for magnets
Handling guide
Handle magnets with awareness. Their immense force can surprise even professionals. Be vigilant and do not underestimate their power.
Risk of cracking
Neodymium magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them cracking into shards.
Threat to navigation
Navigation devices and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
Metal Allergy
A percentage of the population suffer from a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Prolonged contact can result in a rash. We recommend use protective gloves.
Magnetic media
Device Safety: Neodymium magnets can damage payment cards and delicate electronics (heart implants, medical aids, mechanical watches).
Medical interference
Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Operating temperature
Control the heat. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.
Product not for children
Product intended for adults. Tiny parts can be swallowed, leading to serious injuries. Store away from children and animals.
Hand protection
Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying anything in their path. Be careful!
Fire warning
Machining of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.
