MW 16x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010033
GTIN/EAN: 5906301810322
Diameter Ø
16 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
4.52 g
Magnetization Direction
↑ axial
Load capacity
2.97 kg / 29.11 N
Magnetic Induction
217.61 mT / 2176 Gs
Coating
[NiCuNi] Nickel
1.734 ZŁ with VAT / pcs + price for transport
1.410 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 16x3 / N38 - cylindrical magnet
Specification / characteristics - MW 16x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010033 |
| GTIN/EAN | 5906301810322 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 16 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 4.52 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.97 kg / 29.11 N |
| Magnetic Induction ~ ? | 217.61 mT / 2176 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 modeling of the product - data
These values constitute the outcome of a mathematical simulation. Values are based on models for the material Nd2Fe14B. Real-world performance might slightly differ. Use these data as a reference point when designing systems.
Table 1: Static pull force (force vs gap) - characteristics
MW 16x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2176 Gs
217.6 mT
|
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
|
warning |
| 1 mm |
2004 Gs
200.4 mT
|
2.52 kg / 5.55 pounds
2519.3 g / 24.7 N
|
warning |
| 2 mm |
1782 Gs
178.2 mT
|
1.99 kg / 4.39 pounds
1993.2 g / 19.6 N
|
low risk |
| 3 mm |
1543 Gs
154.3 mT
|
1.49 kg / 3.29 pounds
1494.0 g / 14.7 N
|
low risk |
| 5 mm |
1098 Gs
109.8 mT
|
0.76 kg / 1.67 pounds
756.6 g / 7.4 N
|
low risk |
| 10 mm |
439 Gs
43.9 mT
|
0.12 kg / 0.27 pounds
120.9 g / 1.2 N
|
low risk |
| 15 mm |
195 Gs
19.5 mT
|
0.02 kg / 0.05 pounds
23.9 g / 0.2 N
|
low risk |
| 20 mm |
99 Gs
9.9 mT
|
0.01 kg / 0.01 pounds
6.2 g / 0.1 N
|
low risk |
| 30 mm |
35 Gs
3.5 mT
|
0.00 kg / 0.00 pounds
0.8 g / 0.0 N
|
low risk |
| 50 mm |
8 Gs
0.8 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Vertical capacity (wall)
MW 16x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.59 kg / 1.31 pounds
594.0 g / 5.8 N
|
| 1 mm | Stal (~0.2) |
0.50 kg / 1.11 pounds
504.0 g / 4.9 N
|
| 2 mm | Stal (~0.2) |
0.40 kg / 0.88 pounds
398.0 g / 3.9 N
|
| 3 mm | Stal (~0.2) |
0.30 kg / 0.66 pounds
298.0 g / 2.9 N
|
| 5 mm | Stal (~0.2) |
0.15 kg / 0.34 pounds
152.0 g / 1.5 N
|
| 10 mm | Stal (~0.2) |
0.02 kg / 0.05 pounds
24.0 g / 0.2 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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: Vertical assembly (sliding) - vertical pull
MW 16x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.89 kg / 1.96 pounds
891.0 g / 8.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.59 kg / 1.31 pounds
594.0 g / 5.8 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.30 kg / 0.65 pounds
297.0 g / 2.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.49 kg / 3.27 pounds
1485.0 g / 14.6 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 16x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.30 kg / 0.65 pounds
297.0 g / 2.9 N
|
| 1 mm |
|
0.74 kg / 1.64 pounds
742.5 g / 7.3 N
|
| 2 mm |
|
1.49 kg / 3.27 pounds
1485.0 g / 14.6 N
|
| 3 mm |
|
2.23 kg / 4.91 pounds
2227.5 g / 21.9 N
|
| 5 mm |
|
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
|
| 10 mm |
|
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
|
| 11 mm |
|
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
|
| 12 mm |
|
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
|
Table 5: Working in heat (material behavior) - power drop
MW 16x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.97 kg / 6.55 pounds
2970.0 g / 29.1 N
|
OK |
| 40 °C | -2.2% |
2.90 kg / 6.40 pounds
2904.7 g / 28.5 N
|
OK |
| 60 °C | -4.4% |
2.84 kg / 6.26 pounds
2839.3 g / 27.9 N
|
|
| 80 °C | -6.6% |
2.77 kg / 6.12 pounds
2774.0 g / 27.2 N
|
|
| 100 °C | -28.8% |
2.11 kg / 4.66 pounds
2114.6 g / 20.7 N
|
Table 6: Two magnets (repulsion) - field collision
MW 16x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
5.87 kg / 12.93 pounds
3 716 Gs
|
0.88 kg / 1.94 pounds
880 g / 8.6 N
|
N/A |
| 1 mm |
5.46 kg / 12.03 pounds
4 197 Gs
|
0.82 kg / 1.80 pounds
819 g / 8.0 N
|
4.91 kg / 10.83 pounds
~0 Gs
|
| 2 mm |
4.98 kg / 10.97 pounds
4 007 Gs
|
0.75 kg / 1.65 pounds
746 g / 7.3 N
|
4.48 kg / 9.87 pounds
~0 Gs
|
| 3 mm |
4.46 kg / 9.83 pounds
3 794 Gs
|
0.67 kg / 1.48 pounds
669 g / 6.6 N
|
4.01 kg / 8.85 pounds
~0 Gs
|
| 5 mm |
3.43 kg / 7.56 pounds
3 326 Gs
|
0.51 kg / 1.13 pounds
514 g / 5.0 N
|
3.09 kg / 6.80 pounds
~0 Gs
|
| 10 mm |
1.49 kg / 3.30 pounds
2 196 Gs
|
0.22 kg / 0.49 pounds
224 g / 2.2 N
|
1.35 kg / 2.97 pounds
~0 Gs
|
| 20 mm |
0.24 kg / 0.53 pounds
878 Gs
|
0.04 kg / 0.08 pounds
36 g / 0.4 N
|
0.21 kg / 0.47 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
113 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
70 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
46 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
32 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
23 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
17 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - warnings
MW 16x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 3.0 cm |
| Remote | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (kinetic energy) - warning
MW 16x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
26.50 km/h
(7.36 m/s)
|
0.12 J | |
| 30 mm |
44.78 km/h
(12.44 m/s)
|
0.35 J | |
| 50 mm |
57.81 km/h
(16.06 m/s)
|
0.58 J | |
| 100 mm |
81.75 km/h
(22.71 m/s)
|
1.17 J |
Table 9: Anti-corrosion coating durability
MW 16x3 / 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 16x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 5 141 Mx | 51.4 µWb |
| Pc Coefficient | 0.27 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 16x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.97 kg | Standard |
| Water (riverbed) |
3.40 kg
(+0.43 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet retains merely ~20% of its perpendicular strength.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) significantly limits the holding force.
3. Power loss vs temp
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.27
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 |
View also products
Pros and cons of neodymium magnets.
Benefits
- They have stable power, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
- They do not lose their magnetic properties even under strong external field,
- Thanks to the shiny finish, the plating of nickel, gold, or silver gives an aesthetic appearance,
- They feature high magnetic induction at the operating surface, which affects their effectiveness,
- 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...
- Thanks to modularity in forming and the ability to customize to specific needs,
- Significant place in innovative solutions – they serve a role in hard drives, electromotive mechanisms, medical devices, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in compact constructions
Weaknesses
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can reduce their power 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 corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of producing nuts in the magnet and complex shapes - preferred is a housing - mounting mechanism.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these products can complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Detachment force of the magnet in optimal conditions – what affects it?
- with the contact of a yoke made of special test steel, ensuring maximum field concentration
- with a thickness minimum 10 mm
- with a plane free of scratches
- with total lack of distance (no impurities)
- during detachment in a direction vertical to the plane
- at temperature room level
Lifting capacity in real conditions – factors
- Distance (betwixt the magnet and the metal), since even a tiny distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to paint, corrosion or debris).
- Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Plate material – low-carbon steel gives the best results. Alloy steels lower magnetic properties and holding force.
- Surface finish – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate reduces the holding force.
H&S for magnets
Product not for children
Neodymium magnets are not toys. Eating a few magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.
Avoid contact if allergic
Certain individuals have a sensitization to nickel, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to skin redness. We strongly advise use safety gloves.
Mechanical processing
Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.
Keep away from electronics
Navigation devices and smartphones are highly susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the internal compass in your phone.
Safe operation
Handle with care. Rare earth magnets attract from a distance and connect with huge force, often faster than you can react.
Bone fractures
Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, crushing everything in their path. Exercise extreme caution!
Operating temperature
Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Magnetic media
Do not bring magnets near a wallet, computer, or screen. The magnetic field can destroy these devices and erase data from cards.
Warning for heart patients
Warning for patients: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or ask another person to handle the magnets.
Fragile material
Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them shattering into shards.
