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
bulk discounts:
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Technical - 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 analysis of the assembly - technical parameters
Presented values constitute the result of a engineering calculation. Values are based on algorithms for the class Nd2Fe14B. Real-world parameters might slightly differ from theoretical values. Use these calculations as a supplementary guide during assembly planning.
Table 1: Static force (pull vs gap) - 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 pounds
440.0 g / 4.3 N
|
weak grip |
| 1 mm |
778 Gs
77.8 mT
|
0.40 kg / 0.88 pounds
397.0 g / 3.9 N
|
weak grip |
| 2 mm |
705 Gs
70.5 mT
|
0.33 kg / 0.72 pounds
326.0 g / 3.2 N
|
weak grip |
| 3 mm |
615 Gs
61.5 mT
|
0.25 kg / 0.55 pounds
248.0 g / 2.4 N
|
weak grip |
| 5 mm |
434 Gs
43.4 mT
|
0.12 kg / 0.27 pounds
123.5 g / 1.2 N
|
weak grip |
| 10 mm |
163 Gs
16.3 mT
|
0.02 kg / 0.04 pounds
17.3 g / 0.2 N
|
weak grip |
| 15 mm |
68 Gs
6.8 mT
|
0.00 kg / 0.01 pounds
3.1 g / 0.0 N
|
weak grip |
| 20 mm |
34 Gs
3.4 mT
|
0.00 kg / 0.00 pounds
0.7 g / 0.0 N
|
weak grip |
| 30 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding capacity (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 pounds
88.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.08 kg / 0.18 pounds
80.0 g / 0.8 N
|
| 2 mm | Stal (~0.2) |
0.07 kg / 0.15 pounds
66.0 g / 0.6 N
|
| 3 mm | Stal (~0.2) |
0.05 kg / 0.11 pounds
50.0 g / 0.5 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.05 pounds
24.0 g / 0.2 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 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) - 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 pounds
132.0 g / 1.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.09 kg / 0.19 pounds
88.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.22 kg / 0.49 pounds
220.0 g / 2.2 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 15x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| 1 mm |
|
0.11 kg / 0.24 pounds
110.0 g / 1.1 N
|
| 2 mm |
|
0.22 kg / 0.49 pounds
220.0 g / 2.2 N
|
| 3 mm |
|
0.33 kg / 0.73 pounds
330.0 g / 3.2 N
|
| 5 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 10 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 11 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
| 12 mm |
|
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
Table 5: Thermal resistance (material behavior) - resistance threshold
MW 15x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.44 kg / 0.97 pounds
440.0 g / 4.3 N
|
OK |
| 40 °C | -2.2% |
0.43 kg / 0.95 pounds
430.3 g / 4.2 N
|
OK |
| 60 °C | -4.4% |
0.42 kg / 0.93 pounds
420.6 g / 4.1 N
|
|
| 80 °C | -6.6% |
0.41 kg / 0.91 pounds
411.0 g / 4.0 N
|
|
| 100 °C | -28.8% |
0.31 kg / 0.69 pounds
313.3 g / 3.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 15x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.73 kg / 1.61 pounds
1 597 Gs
|
0.11 kg / 0.24 pounds
110 g / 1.1 N
|
N/A |
| 1 mm |
0.70 kg / 1.55 pounds
1 607 Gs
|
0.11 kg / 0.23 pounds
106 g / 1.0 N
|
0.63 kg / 1.40 pounds
~0 Gs
|
| 2 mm |
0.66 kg / 1.45 pounds
1 556 Gs
|
0.10 kg / 0.22 pounds
99 g / 1.0 N
|
0.59 kg / 1.31 pounds
~0 Gs
|
| 3 mm |
0.60 kg / 1.33 pounds
1 489 Gs
|
0.09 kg / 0.20 pounds
91 g / 0.9 N
|
0.54 kg / 1.20 pounds
~0 Gs
|
| 5 mm |
0.48 kg / 1.05 pounds
1 323 Gs
|
0.07 kg / 0.16 pounds
71 g / 0.7 N
|
0.43 kg / 0.95 pounds
~0 Gs
|
| 10 mm |
0.21 kg / 0.45 pounds
868 Gs
|
0.03 kg / 0.07 pounds
31 g / 0.3 N
|
0.18 kg / 0.41 pounds
~0 Gs
|
| 20 mm |
0.03 kg / 0.06 pounds
325 Gs
|
0.00 kg / 0.01 pounds
4 g / 0.0 N
|
0.03 kg / 0.06 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
37 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 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
|
| 70 mm |
0.00 kg / 0.00 pounds
15 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
10 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
7 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
5 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (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 |
| Mechanical watch | 20 Gs (2.0 mT) | 2.5 cm |
| Phone / Smartphone | 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) - warning
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: Surface protection spec
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: Electrical data (Pc)
MW 15x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 025 Mx | 20.3 µWb |
| Pc Coefficient | 0.11 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
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 approx. 20-30% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. 0.5mm PC case) drastically limits the holding force.
3. Power loss vs temp
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.11
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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Strengths as well as weaknesses of rare earth magnets.
Benefits
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- They maintain their magnetic properties even under external field action,
- Thanks to the glossy finish, the coating of nickel, gold-plated, or silver-plated gives an professional appearance,
- Magnets possess extremely high magnetic induction on the active area,
- Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to versatility in constructing and the capacity to adapt to specific needs,
- Versatile presence in electronics industry – they find application in mass storage devices, drive modules, advanced medical instruments, as well as modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in small systems
Cons
- Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 extremely resistant to heat
- 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, when using outdoors
- Limited ability of creating threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
- Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these devices are able to be problematic in diagnostics medical in case of swallowing.
- With large orders the cost of neodymium magnets is a challenge,
Pull force analysis
Maximum magnetic pulling force – what it depends on?
- using a sheet made of high-permeability steel, acting as a ideal flux conductor
- with a thickness no less than 10 mm
- with a surface cleaned and smooth
- without the slightest air gap between the magnet and steel
- for force applied at a right angle (pull-off, not shear)
- at conditions approx. 20°C
What influences lifting capacity in practice
- Air gap (betwixt the magnet and the plate), because even a very small distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
- Angle of force application – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Metal type – different alloys attracts identically. Alloy additives weaken the attraction effect.
- Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, reducing force.
- Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.
Safety rules for work with neodymium magnets
Nickel allergy
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop working with magnets and wear gloves.
Heat warning
Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.
Mechanical processing
Dust produced during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
No play value
Product intended for adults. Small elements can be swallowed, causing serious injuries. Store away from children and animals.
Electronic hazard
Intense magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.
Life threat
Warning for patients: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or request help to work with the magnets.
Threat to navigation
Remember: rare earth magnets generate a field that disrupts sensitive sensors. Maintain a separation from your phone, device, and GPS.
Material brittleness
NdFeB magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets will cause them shattering into small pieces.
Immense force
Handle magnets with awareness. Their immense force can shock even experienced users. Stay alert and respect their power.
Bone fractures
Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.
