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
Load capacity
1.51 kg / 14.84 N
Magnetic Induction
159.70 mT / 1597 Gs
Coating
[NiCuNi] Nickel
1.218 ZŁ with VAT / pcs + price for transport
0.990 ZŁ net + 23% VAT / pcs
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Detailed specification - 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 | 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 - data
These values constitute the outcome of a mathematical calculation. Results are based on algorithms for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these calculations as a reference point during assembly planning.
Table 1: Static pull force (force 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
|
low risk |
| 1 mm |
1483 Gs
148.3 mT
|
1.30 kg / 2.87 lbs
1303.0 g / 12.8 N
|
low risk |
| 2 mm |
1320 Gs
132.0 mT
|
1.03 kg / 2.28 lbs
1032.2 g / 10.1 N
|
low risk |
| 3 mm |
1137 Gs
113.7 mT
|
0.77 kg / 1.69 lbs
765.0 g / 7.5 N
|
low risk |
| 5 mm |
791 Gs
79.1 mT
|
0.37 kg / 0.82 lbs
370.8 g / 3.6 N
|
low risk |
| 10 mm |
298 Gs
29.8 mT
|
0.05 kg / 0.12 lbs
52.5 g / 0.5 N
|
low risk |
| 15 mm |
127 Gs
12.7 mT
|
0.01 kg / 0.02 lbs
9.6 g / 0.1 N
|
low risk |
| 20 mm |
63 Gs
6.3 mT
|
0.00 kg / 0.01 lbs
2.4 g / 0.0 N
|
low risk |
| 30 mm |
22 Gs
2.2 mT
|
0.00 kg / 0.00 lbs
0.3 g / 0.0 N
|
low risk |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage hold (wall)
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: Vertical assembly (sliding) - 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: Material efficiency (saturation) - 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 resistance (material behavior) - resistance threshold
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: Two magnets (attraction) - field range
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: Safety (HSE) (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 |
| Mechanical watch | 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 (kinetic energy) - collision effects
MW 15x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.59 km/h
(6.83 m/s)
|
0.06 J | |
| 30 mm |
41.70 km/h
(11.58 m/s)
|
0.18 J | |
| 50 mm |
53.83 km/h
(14.95 m/s)
|
0.30 J | |
| 100 mm |
76.13 km/h
(21.15 m/s)
|
0.59 J |
Table 9: Coating parameters (durability)
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: Electrical 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: Hydrostatics and buoyancy
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. Sliding resistance
*Note: On a vertical surface, the magnet retains just ~20% of its max power.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) significantly weakens the holding force.
3. Temperature resistance
*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) = 0.20
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.
Material specification
| 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
View also proposals
Strengths and weaknesses of rare earth magnets.
Advantages
- They retain full power for around ten years – the drop is just ~1% (based on simulations),
- Neodymium magnets are distinguished by remarkably resistant to magnetic field loss caused by magnetic disturbances,
- The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to present itself better,
- They show high magnetic induction at the operating surface, making them more effective,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of exact forming as well as adjusting to complex needs,
- Wide application in advanced technology sectors – they serve a role in mass storage devices, electric motors, advanced medical instruments, also other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in creating nuts and complex shapes in magnets, we propose using a housing - magnetic mount.
- Possible danger related to microscopic parts of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, tiny parts of these products can be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what it depends on?
- on a base made of structural steel, optimally conducting the magnetic field
- whose transverse dimension reaches at least 10 mm
- characterized by even structure
- without the slightest insulating layer between the magnet and steel
- during detachment in a direction vertical to the mounting surface
- in temp. approx. 20°C
Practical aspects of lifting capacity – factors
- Distance (between the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
- Surface finish – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Temperature – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.
Lifting capacity was assessed by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate decreases the holding force.
Warnings
Data carriers
Data protection: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).
Skin irritation risks
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, cease working with magnets and wear gloves.
Fire risk
Drilling and cutting of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Do not underestimate power
Handle magnets with awareness. Their immense force can surprise even professionals. Plan your moves and respect their power.
Bodily injuries
Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!
Magnet fragility
Despite the nickel coating, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Pacemakers
For implant holders: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or request help to handle the magnets.
Power loss in heat
Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. Damage is permanent.
Swallowing risk
Absolutely keep magnets away from children. Ingestion danger is high, and the consequences of magnets clamping inside the body are tragic.
GPS Danger
A powerful magnetic field negatively affects the operation of magnetometers in phones and navigation systems. Maintain magnets close to a smartphone to avoid breaking the sensors.
