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 details - 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 |
Technical modeling of the magnet - data
These information are the outcome of a physical calculation. Values rely on algorithms for the class Nd2Fe14B. Operational parameters may differ. Treat these calculations as a supplementary guide during assembly planning.
Table 1: Static force (force 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
|
safe |
| 1 mm |
778 Gs
77.8 mT
|
0.40 kg / 0.88 lbs
397.0 g / 3.9 N
|
safe |
| 2 mm |
705 Gs
70.5 mT
|
0.33 kg / 0.72 lbs
326.0 g / 3.2 N
|
safe |
| 3 mm |
615 Gs
61.5 mT
|
0.25 kg / 0.55 lbs
248.0 g / 2.4 N
|
safe |
| 5 mm |
434 Gs
43.4 mT
|
0.12 kg / 0.27 lbs
123.5 g / 1.2 N
|
safe |
| 10 mm |
163 Gs
16.3 mT
|
0.02 kg / 0.04 lbs
17.3 g / 0.2 N
|
safe |
| 15 mm |
68 Gs
6.8 mT
|
0.00 kg / 0.01 lbs
3.1 g / 0.0 N
|
safe |
| 20 mm |
34 Gs
3.4 mT
|
0.00 kg / 0.00 lbs
0.7 g / 0.0 N
|
safe |
| 30 mm |
11 Gs
1.1 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
safe |
Table 2: Shear 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 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 (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 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: Material efficiency (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: Working in heat (material behavior) - thermal limit
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 (repulsion) - field range
MW 15x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (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: Safety (HSE) (implants) - precautionary measures
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 |
| Remote | 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: Impact energy (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: 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: Electrical 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: 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
*Warning: On a vertical wall, the magnet retains merely ~20% of its max power.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Thermal stability
*For standard magnets, 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 |
See also products
Pros and cons of rare earth magnets.
Pros
- Their strength remains stable, and after around ten years it drops only by ~1% (according to research),
- Neodymium magnets are characterized by extremely resistant to loss of magnetic properties caused by external magnetic fields,
- Thanks to the smooth finish, the coating of Ni-Cu-Ni, gold, or silver-plated gives an clean appearance,
- Magnetic induction on the working layer of the magnet turns out to be very high,
- 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 versatility in shaping and the ability to modify to specific needs,
- Universal use in innovative solutions – they serve a role in data components, electric motors, medical devices, and modern systems.
- Thanks to their power density, small magnets offer high operating force, occupying minimum space,
Limitations
- At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop 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 extremely resistant to heat
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited ability of making nuts in the magnet and complicated forms - preferred is casing - magnetic holder.
- Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these devices can complicate diagnosis medical after entering the body.
- With budget limitations the cost of neodymium magnets is a challenge,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a base made of mild steel, acting as a ideal flux conductor
- with a cross-section minimum 10 mm
- characterized by even structure
- under conditions of no distance (surface-to-surface)
- for force acting at a right angle (pull-off, not shear)
- at temperature room level
Practical aspects of lifting capacity – factors
- Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Material type – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
- Base smoothness – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
- Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.
Warnings
Do not drill into magnets
Dust produced during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Nickel allergy
It is widely known that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact or opt for versions in plastic housing.
Bone fractures
Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
Precision electronics
Remember: rare earth magnets generate a field that confuses precision electronics. Maintain a separation from your mobile, tablet, and navigation systems.
Do not give to children
NdFeB magnets are not toys. Accidental ingestion of multiple magnets can lead to them connecting inside the digestive tract, which poses a critical condition and necessitates urgent medical intervention.
Handling guide
Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.
Risk of cracking
Watch out for shards. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.
Heat warning
Standard neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. This process is irreversible.
Medical interference
Warning for patients: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or request help to handle the magnets.
Magnetic media
Data protection: Strong magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).
