MW 15x1 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010026
GTIN/EAN: 5906301810254
Diameter Ø
15 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
1.33 g
Magnetization Direction
↑ axial
Load capacity
0.44 kg / 4.29 N
Magnetic Induction
81.93 mT / 819 Gs
Coating
[NiCuNi] Nickel
0.800 ZŁ with VAT / pcs + price for transport
0.650 ZŁ net + 23% VAT / pcs
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Technical of the product - MW 15x1 / N38 - cylindrical magnet
Specification / characteristics - MW 15x1 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010026 |
| GTIN/EAN | 5906301810254 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 15 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 1.33 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.44 kg / 4.29 N |
| Magnetic Induction ~ ? | 81.93 mT / 819 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 magnet - data
These values constitute the result of a physical calculation. Results rely on algorithms for the material Nd2Fe14B. Real-world conditions might slightly differ from theoretical values. Treat these data as a preliminary roadmap for designers.
Table 1: Static force (pull vs distance) - interaction chart
MW 15x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
819 Gs
81.9 mT
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
weak grip |
| 1 mm |
778 Gs
77.8 mT
|
0.40 kg / 0.88 LBS
397.0 g / 3.9 N
|
weak grip |
| 2 mm |
705 Gs
70.5 mT
|
0.33 kg / 0.72 LBS
326.0 g / 3.2 N
|
weak grip |
| 3 mm |
615 Gs
61.5 mT
|
0.25 kg / 0.55 LBS
248.0 g / 2.4 N
|
weak grip |
| 5 mm |
434 Gs
43.4 mT
|
0.12 kg / 0.27 LBS
123.5 g / 1.2 N
|
weak grip |
| 10 mm |
163 Gs
16.3 mT
|
0.02 kg / 0.04 LBS
17.3 g / 0.2 N
|
weak grip |
| 15 mm |
68 Gs
6.8 mT
|
0.00 kg / 0.01 LBS
3.1 g / 0.0 N
|
weak grip |
| 20 mm |
34 Gs
3.4 mT
|
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
|
weak grip |
| 30 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage load (vertical surface)
MW 15x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.09 kg / 0.19 LBS
88.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.08 kg / 0.18 LBS
80.0 g / 0.8 N
|
| 2 mm | Stal (~0.2) |
0.07 kg / 0.15 LBS
66.0 g / 0.6 N
|
| 3 mm | Stal (~0.2) |
0.05 kg / 0.11 LBS
50.0 g / 0.5 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.05 LBS
24.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 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 (shearing) - behavior on slippery surfaces
MW 15x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.13 kg / 0.29 LBS
132.0 g / 1.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.09 kg / 0.19 LBS
88.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.22 kg / 0.49 LBS
220.0 g / 2.2 N
|
Table 4: Steel thickness (saturation) - power losses
MW 15x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
|
| 1 mm |
|
0.11 kg / 0.24 LBS
110.0 g / 1.1 N
|
| 2 mm |
|
0.22 kg / 0.49 LBS
220.0 g / 2.2 N
|
| 3 mm |
|
0.33 kg / 0.73 LBS
330.0 g / 3.2 N
|
| 5 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
| 10 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
| 11 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
| 12 mm |
|
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
Table 5: Thermal stability (stability) - power drop
MW 15x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.44 kg / 0.97 LBS
440.0 g / 4.3 N
|
OK |
| 40 °C | -2.2% |
0.43 kg / 0.95 LBS
430.3 g / 4.2 N
|
OK |
| 60 °C | -4.4% |
0.42 kg / 0.93 LBS
420.6 g / 4.1 N
|
|
| 80 °C | -6.6% |
0.41 kg / 0.91 LBS
411.0 g / 4.0 N
|
|
| 100 °C | -28.8% |
0.31 kg / 0.69 LBS
313.3 g / 3.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 15x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.73 kg / 1.61 LBS
1 597 Gs
|
0.11 kg / 0.24 LBS
110 g / 1.1 N
|
N/A |
| 1 mm |
0.70 kg / 1.55 LBS
1 607 Gs
|
0.11 kg / 0.23 LBS
106 g / 1.0 N
|
0.63 kg / 1.40 LBS
~0 Gs
|
| 2 mm |
0.66 kg / 1.45 LBS
1 556 Gs
|
0.10 kg / 0.22 LBS
99 g / 1.0 N
|
0.59 kg / 1.31 LBS
~0 Gs
|
| 3 mm |
0.60 kg / 1.33 LBS
1 489 Gs
|
0.09 kg / 0.20 LBS
91 g / 0.9 N
|
0.54 kg / 1.20 LBS
~0 Gs
|
| 5 mm |
0.48 kg / 1.05 LBS
1 323 Gs
|
0.07 kg / 0.16 LBS
71 g / 0.7 N
|
0.43 kg / 0.95 LBS
~0 Gs
|
| 10 mm |
0.21 kg / 0.45 LBS
868 Gs
|
0.03 kg / 0.07 LBS
31 g / 0.3 N
|
0.18 kg / 0.41 LBS
~0 Gs
|
| 20 mm |
0.03 kg / 0.06 LBS
325 Gs
|
0.00 kg / 0.01 LBS
4 g / 0.0 N
|
0.03 kg / 0.06 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
37 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 LBS
23 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 LBS
15 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
10 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
7 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
5 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - warnings
MW 15x1 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 2.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.0 cm |
| Car key | 50 Gs (5.0 mT) | 2.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Dynamics (cracking risk) - collision effects
MW 15x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
18.79 km/h
(5.22 m/s)
|
0.02 J | |
| 30 mm |
31.78 km/h
(8.83 m/s)
|
0.05 J | |
| 50 mm |
41.02 km/h
(11.39 m/s)
|
0.09 J | |
| 100 mm |
58.01 km/h
(16.11 m/s)
|
0.17 J |
Table 9: Coating parameters (durability)
MW 15x1 / 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 15x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 025 Mx | 20.3 µWb |
| Pc Coefficient | 0.11 | Low (Flat) |
Table 11: Physics of underwater searching
MW 15x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.44 kg | Standard |
| Water (riverbed) |
0.50 kg
(+0.06 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet retains just a fraction of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.
3. Temperature resistance
*For N38 material, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.11
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.
Elemental analysis
| 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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Strengths as well as weaknesses of neodymium magnets.
Advantages
- They retain magnetic properties for nearly ten years – the loss is just ~1% (based on simulations),
- They are extremely resistant to demagnetization induced by external field influence,
- A magnet with a smooth nickel surface looks better,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to flexibility in shaping and the ability to adapt to complex applications,
- Huge importance in future technologies – they serve a role in magnetic memories, drive modules, diagnostic systems, as well as industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in miniature devices
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
- Neodymium magnets decrease their power 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
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in producing nuts and complicated forms in magnets, we propose using cover - magnetic mount.
- Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can complicate diagnosis medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum magnetic pulling force – what affects it?
- on a plate made of mild steel, effectively closing the magnetic flux
- with a cross-section of at least 10 mm
- characterized by smoothness
- without the slightest air gap between the magnet and steel
- under vertical force vector (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Lifting capacity in practice – influencing factors
- Distance – existence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- 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 – mild steel gives the best results. Alloy admixtures reduce magnetic properties and lifting capacity.
- Base smoothness – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Thermal factor – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.
Warnings
Life threat
Patients with a ICD must maintain an large gap from magnets. The magnetic field can stop the functioning of the life-saving device.
Finger safety
Large magnets can break fingers instantly. Never place your hand betwixt two strong magnets.
Compass and GPS
Note: rare earth magnets produce a field that interferes with precision electronics. Keep a safe distance from your phone, device, and GPS.
Choking Hazard
Always keep magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.
Nickel allergy
Medical facts indicate that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, avoid touching magnets with bare hands or opt for encased magnets.
Safe operation
Handle magnets with awareness. Their huge power can shock even experienced users. Stay alert and respect their force.
Protect data
Do not bring magnets close to a purse, laptop, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.
Risk of cracking
Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Demagnetization risk
Do not overheat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).
Dust is flammable
Dust created during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
