MW 15x2 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010028
GTIN/EAN: 5906301810278
- Diameter Ø
- 15 mm [±0,1 mm]
- Height
- 2 mm [±0,1 mm]
- Weight
- 2.65 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
0.990 zł net / pcs
1.218 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Physical properties - MW 15x2 / N38 - cylindrical magnet
Specification / characteristics - MW 15x2 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010028 |
| GTIN/EAN | 5906301810278 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 15 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 2.65 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.51 kg / 14.84 N |
| Magnetic Induction ~ ? | 159.70 mT / 1597 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 - technical parameters
Presented information are the result of a engineering simulation. Values rely on algorithms for the material Nd2Fe14B. Operational conditions may deviate from the simulation results. Treat these calculations as a preliminary roadmap during assembly planning.
Table 1: Static pull force (pull vs distance) - interaction chart
MW 15x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1597 Gs
159.7 mT
|
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
|
weak grip |
| 1 mm |
1483 Gs
148.3 mT
|
1.30 kg / 2.87 LBS
1303.0 g / 12.8 N
|
weak grip |
| 2 mm |
1320 Gs
132.0 mT
|
1.03 kg / 2.28 LBS
1032.2 g / 10.1 N
|
weak grip |
| 3 mm |
1137 Gs
113.7 mT
|
0.77 kg / 1.69 LBS
765.0 g / 7.5 N
|
weak grip |
| 5 mm |
791 Gs
79.1 mT
|
0.37 kg / 0.82 LBS
370.8 g / 3.6 N
|
weak grip |
| 10 mm |
298 Gs
29.8 mT
|
0.05 kg / 0.12 LBS
52.5 g / 0.5 N
|
weak grip |
| 15 mm |
127 Gs
12.7 mT
|
0.01 kg / 0.02 LBS
9.6 g / 0.1 N
|
weak grip |
| 20 mm |
63 Gs
6.3 mT
|
0.00 kg / 0.01 LBS
2.4 g / 0.0 N
|
weak grip |
| 30 mm |
22 Gs
2.2 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
weak grip |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
Table 2: Shear hold (vertical surface)
MW 15x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.30 kg / 0.67 LBS
302.0 g / 3.0 N
|
| 1 mm | Stal (~0.2) |
0.26 kg / 0.57 LBS
260.0 g / 2.6 N
|
| 2 mm | Stal (~0.2) |
0.21 kg / 0.45 LBS
206.0 g / 2.0 N
|
| 3 mm | Stal (~0.2) |
0.15 kg / 0.34 LBS
154.0 g / 1.5 N
|
| 5 mm | Stal (~0.2) |
0.07 kg / 0.16 LBS
74.0 g / 0.7 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 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: Wall mounting (shearing) - behavior on slippery surfaces
MW 15x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.45 kg / 1.00 LBS
453.0 g / 4.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.30 kg / 0.67 LBS
302.0 g / 3.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.15 kg / 0.33 LBS
151.0 g / 1.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.76 kg / 1.66 LBS
755.0 g / 7.4 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 15x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.15 kg / 0.33 LBS
151.0 g / 1.5 N
|
| 1 mm |
|
0.38 kg / 0.83 LBS
377.5 g / 3.7 N
|
| 2 mm |
|
0.76 kg / 1.66 LBS
755.0 g / 7.4 N
|
| 3 mm |
|
1.13 kg / 2.50 LBS
1132.5 g / 11.1 N
|
| 5 mm |
|
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
|
| 10 mm |
|
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
|
| 11 mm |
|
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
|
| 12 mm |
|
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
|
Table 5: Thermal stability (stability) - power drop
MW 15x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.51 kg / 3.33 LBS
1510.0 g / 14.8 N
|
OK |
| 40 °C | -2.2% |
1.48 kg / 3.26 LBS
1476.8 g / 14.5 N
|
OK |
| 60 °C | -4.4% |
1.44 kg / 3.18 LBS
1443.6 g / 14.2 N
|
|
| 80 °C | -6.6% |
1.41 kg / 3.11 LBS
1410.3 g / 13.8 N
|
|
| 100 °C | -28.8% |
1.08 kg / 2.37 LBS
1075.1 g / 10.5 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 15x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.78 kg / 6.12 LBS
2 915 Gs
|
0.42 kg / 0.92 LBS
417 g / 4.1 N
|
N/A |
| 1 mm |
2.61 kg / 5.76 LBS
3 096 Gs
|
0.39 kg / 0.86 LBS
392 g / 3.8 N
|
2.35 kg / 5.18 LBS
~0 Gs
|
| 2 mm |
2.40 kg / 5.28 LBS
2 966 Gs
|
0.36 kg / 0.79 LBS
360 g / 3.5 N
|
2.16 kg / 4.76 LBS
~0 Gs
|
| 3 mm |
2.15 kg / 4.75 LBS
2 812 Gs
|
0.32 kg / 0.71 LBS
323 g / 3.2 N
|
1.94 kg / 4.27 LBS
~0 Gs
|
| 5 mm |
1.65 kg / 3.63 LBS
2 459 Gs
|
0.25 kg / 0.54 LBS
247 g / 2.4 N
|
1.48 kg / 3.27 LBS
~0 Gs
|
| 10 mm |
0.68 kg / 1.50 LBS
1 582 Gs
|
0.10 kg / 0.23 LBS
102 g / 1.0 N
|
0.61 kg / 1.35 LBS
~0 Gs
|
| 20 mm |
0.10 kg / 0.21 LBS
595 Gs
|
0.01 kg / 0.03 LBS
14 g / 0.1 N
|
0.09 kg / 0.19 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
71 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
43 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
28 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
19 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
14 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
10 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MW 15x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Dynamics (cracking risk) - collision effects
MW 15x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.74 km/h
(6.32 m/s)
|
0.05 J | |
| 30 mm |
23.07 km/h
(6.41 m/s)
|
0.05 J | |
| 50 mm |
23.08 km/h
(6.41 m/s)
|
0.05 J | |
| 100 mm |
23.08 km/h
(6.41 m/s)
|
0.05 J |
Table 9: Surface protection spec
MW 15x2 / 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 15x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 541 Mx | 35.4 µWb |
| Pc Coefficient | 0.20 | Low (Flat) |
Table 11: Submerged application
MW 15x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.51 kg | Standard |
| Water (riverbed) |
1.73 kg
(+0.22 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical wall, the magnet holds just ~20% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) significantly weakens the holding force.
3. Temperature resistance
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.20
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Advantages as well as disadvantages of rare earth magnets.
Benefits
- They retain full power for around ten years – the drop is just ~1% (in theory),
- Neodymium magnets prove to be extremely resistant to magnetic field loss caused by external magnetic fields,
- Thanks to the metallic finish, the surface of nickel, gold, or silver gives an modern appearance,
- Magnetic induction on the working part of the magnet remains strong,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Possibility of detailed modeling as well as optimizing to atypical conditions,
- Wide application in advanced technology sectors – they find application in mass storage devices, electric motors, advanced medical instruments, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in miniature devices
Cons
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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 resistant to moisture, when using outdoors
- We suggest a housing - magnetic holder, due to difficulties in producing threads inside the magnet and complex shapes.
- Health risk to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these products can be problematic in diagnostics medical after entering the body.
- Due to neodymium price, their price is relatively high,
Lifting parameters
Maximum magnetic pulling force – what contributes to it?
- with the use of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- with a cross-section minimum 10 mm
- with an ground touching surface
- under conditions of gap-free contact (surface-to-surface)
- under axial application of breakaway force (90-degree angle)
- at temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Chemical composition of the base – mild steel gives the best results. Higher carbon content decrease magnetic properties and holding force.
- Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal weaken the grip.
- Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
Safety rules for work with NdFeB magnets
Physical harm
Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
Caution required
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Sensitization to coating
Studies show that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, refrain from direct skin contact and opt for coated magnets.
Shattering risk
Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Electronic hazard
Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, medical aids, timepieces).
Product not for children
Neodymium magnets are not intended for children. Eating multiple magnets can lead to them attracting across intestines, which constitutes a critical condition and requires urgent medical intervention.
Medical implants
Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.
Demagnetization risk
Avoid heat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, inquire about HT versions (H, SH, UH).
Combustion hazard
Machining of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
GPS Danger
A powerful magnetic field disrupts the functioning of compasses in phones and navigation systems. Maintain magnets close to a smartphone to avoid damaging the sensors.
