MW 16x9 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010035
GTIN/EAN: 5906301810346
Diameter Ø
16 mm [±0,1 mm]
Height
9 mm [±0,1 mm]
Weight
13.57 g
Magnetization Direction
↑ axial
Load capacity
8.53 kg / 83.64 N
Magnetic Induction
463.05 mT / 4631 Gs
Coating
[NiCuNi] Nickel
7.36 ZŁ with VAT / pcs + price for transport
5.98 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 16x9 / N38 - cylindrical magnet
Specification / characteristics - MW 16x9 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010035 |
| GTIN/EAN | 5906301810346 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 16 mm [±0,1 mm] |
| Height | 9 mm [±0,1 mm] |
| Weight | 13.57 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 8.53 kg / 83.64 N |
| Magnetic Induction ~ ? | 463.05 mT / 4631 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
The following data represent the outcome of a mathematical simulation. Results were calculated on algorithms for the class Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static force (force vs distance) - characteristics
MW 16x9 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4628 Gs
462.8 mT
|
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
|
warning |
| 1 mm |
4072 Gs
407.2 mT
|
6.60 kg / 14.56 pounds
6603.5 g / 64.8 N
|
warning |
| 2 mm |
3510 Gs
351.0 mT
|
4.91 kg / 10.82 pounds
4906.8 g / 48.1 N
|
warning |
| 3 mm |
2982 Gs
298.2 mT
|
3.54 kg / 7.80 pounds
3540.1 g / 34.7 N
|
warning |
| 5 mm |
2097 Gs
209.7 mT
|
1.75 kg / 3.86 pounds
1751.1 g / 17.2 N
|
low risk |
| 10 mm |
873 Gs
87.3 mT
|
0.30 kg / 0.67 pounds
303.3 g / 3.0 N
|
low risk |
| 15 mm |
411 Gs
41.1 mT
|
0.07 kg / 0.15 pounds
67.3 g / 0.7 N
|
low risk |
| 20 mm |
220 Gs
22.0 mT
|
0.02 kg / 0.04 pounds
19.3 g / 0.2 N
|
low risk |
| 30 mm |
83 Gs
8.3 mT
|
0.00 kg / 0.01 pounds
2.7 g / 0.0 N
|
low risk |
| 50 mm |
22 Gs
2.2 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
low risk |
Table 2: Sliding capacity (vertical surface)
MW 16x9 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.71 kg / 3.76 pounds
1706.0 g / 16.7 N
|
| 1 mm | Stal (~0.2) |
1.32 kg / 2.91 pounds
1320.0 g / 12.9 N
|
| 2 mm | Stal (~0.2) |
0.98 kg / 2.16 pounds
982.0 g / 9.6 N
|
| 3 mm | Stal (~0.2) |
0.71 kg / 1.56 pounds
708.0 g / 6.9 N
|
| 5 mm | Stal (~0.2) |
0.35 kg / 0.77 pounds
350.0 g / 3.4 N
|
| 10 mm | Stal (~0.2) |
0.06 kg / 0.13 pounds
60.0 g / 0.6 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MW 16x9 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.56 kg / 5.64 pounds
2559.0 g / 25.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.71 kg / 3.76 pounds
1706.0 g / 16.7 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.85 kg / 1.88 pounds
853.0 g / 8.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
4.27 kg / 9.40 pounds
4265.0 g / 41.8 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 16x9 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.85 kg / 1.88 pounds
853.0 g / 8.4 N
|
| 1 mm |
|
2.13 kg / 4.70 pounds
2132.5 g / 20.9 N
|
| 2 mm |
|
4.27 kg / 9.40 pounds
4265.0 g / 41.8 N
|
| 3 mm |
|
6.40 kg / 14.10 pounds
6397.5 g / 62.8 N
|
| 5 mm |
|
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
|
| 10 mm |
|
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
|
| 11 mm |
|
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
|
| 12 mm |
|
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
|
Table 5: Working in heat (stability) - resistance threshold
MW 16x9 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
8.53 kg / 18.81 pounds
8530.0 g / 83.7 N
|
OK |
| 40 °C | -2.2% |
8.34 kg / 18.39 pounds
8342.3 g / 81.8 N
|
OK |
| 60 °C | -4.4% |
8.15 kg / 17.98 pounds
8154.7 g / 80.0 N
|
OK |
| 80 °C | -6.6% |
7.97 kg / 17.56 pounds
7967.0 g / 78.2 N
|
|
| 100 °C | -28.8% |
6.07 kg / 13.39 pounds
6073.4 g / 59.6 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 16x9 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
26.55 kg / 58.54 pounds
5 658 Gs
|
3.98 kg / 8.78 pounds
3983 g / 39.1 N
|
N/A |
| 1 mm |
23.52 kg / 51.85 pounds
8 711 Gs
|
3.53 kg / 7.78 pounds
3528 g / 34.6 N
|
21.17 kg / 46.66 pounds
~0 Gs
|
| 2 mm |
20.56 kg / 45.32 pounds
8 145 Gs
|
3.08 kg / 6.80 pounds
3084 g / 30.2 N
|
18.50 kg / 40.79 pounds
~0 Gs
|
| 3 mm |
17.80 kg / 39.23 pounds
7 578 Gs
|
2.67 kg / 5.89 pounds
2669 g / 26.2 N
|
16.02 kg / 35.31 pounds
~0 Gs
|
| 5 mm |
13.01 kg / 28.69 pounds
6 481 Gs
|
1.95 kg / 4.30 pounds
1952 g / 19.2 N
|
11.71 kg / 25.82 pounds
~0 Gs
|
| 10 mm |
5.45 kg / 12.02 pounds
4 194 Gs
|
0.82 kg / 1.80 pounds
818 g / 8.0 N
|
4.91 kg / 10.82 pounds
~0 Gs
|
| 20 mm |
0.94 kg / 2.08 pounds
1 746 Gs
|
0.14 kg / 0.31 pounds
142 g / 1.4 N
|
0.85 kg / 1.87 pounds
~0 Gs
|
| 50 mm |
0.02 kg / 0.05 pounds
260 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.04 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.02 pounds
166 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 pounds
112 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
79 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
58 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
43 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 16x9 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 5.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 4.0 cm |
| Remote | 50 Gs (5.0 mT) | 4.0 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 (kinetic energy) - collision effects
MW 16x9 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
25.84 km/h
(7.18 m/s)
|
0.35 J | |
| 30 mm |
43.80 km/h
(12.17 m/s)
|
1.00 J | |
| 50 mm |
56.54 km/h
(15.71 m/s)
|
1.67 J | |
| 100 mm |
79.96 km/h
(22.21 m/s)
|
3.35 J |
Table 9: Surface protection spec
MW 16x9 / 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 (Pc)
MW 16x9 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 9 394 Mx | 93.9 µWb |
| Pc Coefficient | 0.63 | High (Stable) |
Table 11: Physics of underwater searching
MW 16x9 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 8.53 kg | Standard |
| Water (riverbed) |
9.77 kg
(+1.24 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet retains just ~20% of its max power.
2. Steel saturation
*Thin metal sheet (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) = 0.63
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% |
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.
Pros
- Their power is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
- They are noted for resistance to demagnetization induced by external magnetic fields,
- The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- Neodymium magnets deliver maximum magnetic induction on a contact point, which ensures high operational effectiveness,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to modularity in shaping and the ability to modify to complex applications,
- Wide application in high-tech industry – they are used in magnetic memories, electromotive mechanisms, precision medical tools, also other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices
Weaknesses
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in force. 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
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- We recommend cover - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
- Possible danger resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical after entering the body.
- Due to expensive raw materials, their price exceeds standard values,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what affects it?
- on a block made of mild steel, optimally conducting the magnetic field
- whose transverse dimension equals approx. 10 mm
- characterized by lack of roughness
- under conditions of ideal adhesion (surface-to-surface)
- for force applied at a right angle (in the magnet axis)
- in stable room temperature
What influences lifting capacity in practice
- Distance (between the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
- Direction of force – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Steel type – mild steel attracts best. Alloy steels reduce magnetic properties and lifting capacity.
- Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
- Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.
Precautions when working with neodymium magnets
Threat to electronics
Data protection: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).
No play value
NdFeB magnets are not suitable for play. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and requires urgent medical intervention.
Handling rules
Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.
Implant safety
Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.
Combustion hazard
Powder produced during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.
GPS Danger
Note: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your mobile, device, and navigation systems.
Crushing force
Large magnets can crush fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.
Permanent damage
Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.
Fragile material
Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. We recommend safety glasses.
Allergic reactions
Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands or choose versions in plastic housing.
