MW 18x1.5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010037
GTIN/EAN: 5906301810360
Diameter Ø
18 mm [±0,1 mm]
Height
1.5 mm [±0,1 mm]
Weight
2.86 g
Magnetization Direction
↑ axial
Load capacity
0.95 kg / 9.34 N
Magnetic Induction
101.91 mT / 1019 Gs
Coating
[NiCuNi] Nickel
1.353 ZŁ with VAT / pcs + price for transport
1.100 ZŁ net + 23% VAT / pcs
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Technical details - MW 18x1.5 / N38 - cylindrical magnet
Specification / characteristics - MW 18x1.5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010037 |
| GTIN/EAN | 5906301810360 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 18 mm [±0,1 mm] |
| Height | 1.5 mm [±0,1 mm] |
| Weight | 2.86 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.95 kg / 9.34 N |
| Magnetic Induction ~ ? | 101.91 mT / 1019 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 simulation of the product - technical parameters
Presented information constitute the direct effect of a physical analysis. Results are based on algorithms for the class Nd2Fe14B. Operational performance may deviate from the simulation results. Treat these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs gap) - interaction chart
MW 18x1.5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1019 Gs
101.9 mT
|
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
low risk |
| 1 mm |
975 Gs
97.5 mT
|
0.87 kg / 1.92 lbs
869.2 g / 8.5 N
|
low risk |
| 2 mm |
902 Gs
90.2 mT
|
0.74 kg / 1.64 lbs
744.7 g / 7.3 N
|
low risk |
| 3 mm |
812 Gs
81.2 mT
|
0.60 kg / 1.33 lbs
603.4 g / 5.9 N
|
low risk |
| 5 mm |
619 Gs
61.9 mT
|
0.35 kg / 0.77 lbs
350.6 g / 3.4 N
|
low risk |
| 10 mm |
274 Gs
27.4 mT
|
0.07 kg / 0.15 lbs
68.7 g / 0.7 N
|
low risk |
| 15 mm |
126 Gs
12.6 mT
|
0.01 kg / 0.03 lbs
14.6 g / 0.1 N
|
low risk |
| 20 mm |
65 Gs
6.5 mT
|
0.00 kg / 0.01 lbs
3.9 g / 0.0 N
|
low risk |
| 30 mm |
23 Gs
2.3 mT
|
0.00 kg / 0.00 lbs
0.5 g / 0.0 N
|
low risk |
| 50 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
low risk |
Table 2: Vertical capacity (wall)
MW 18x1.5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
|
| 1 mm | Stal (~0.2) |
0.17 kg / 0.38 lbs
174.0 g / 1.7 N
|
| 2 mm | Stal (~0.2) |
0.15 kg / 0.33 lbs
148.0 g / 1.5 N
|
| 3 mm | Stal (~0.2) |
0.12 kg / 0.26 lbs
120.0 g / 1.2 N
|
| 5 mm | Stal (~0.2) |
0.07 kg / 0.15 lbs
70.0 g / 0.7 N
|
| 10 mm | Stal (~0.2) |
0.01 kg / 0.03 lbs
14.0 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 18x1.5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.29 kg / 0.63 lbs
285.0 g / 2.8 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.19 kg / 0.42 lbs
190.0 g / 1.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.10 kg / 0.21 lbs
95.0 g / 0.9 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.48 kg / 1.05 lbs
475.0 g / 4.7 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 18x1.5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.10 kg / 0.21 lbs
95.0 g / 0.9 N
|
| 1 mm |
|
0.24 kg / 0.52 lbs
237.5 g / 2.3 N
|
| 2 mm |
|
0.48 kg / 1.05 lbs
475.0 g / 4.7 N
|
| 3 mm |
|
0.71 kg / 1.57 lbs
712.5 g / 7.0 N
|
| 5 mm |
|
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
| 10 mm |
|
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
| 11 mm |
|
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
| 12 mm |
|
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
Table 5: Working in heat (material behavior) - resistance threshold
MW 18x1.5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.95 kg / 2.09 lbs
950.0 g / 9.3 N
|
OK |
| 40 °C | -2.2% |
0.93 kg / 2.05 lbs
929.1 g / 9.1 N
|
OK |
| 60 °C | -4.4% |
0.91 kg / 2.00 lbs
908.2 g / 8.9 N
|
|
| 80 °C | -6.6% |
0.89 kg / 1.96 lbs
887.3 g / 8.7 N
|
|
| 100 °C | -28.8% |
0.68 kg / 1.49 lbs
676.4 g / 6.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 18x1.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.63 kg / 3.59 lbs
1 960 Gs
|
0.24 kg / 0.54 lbs
244 g / 2.4 N
|
N/A |
| 1 mm |
1.57 kg / 3.47 lbs
2 002 Gs
|
0.24 kg / 0.52 lbs
236 g / 2.3 N
|
1.41 kg / 3.12 lbs
~0 Gs
|
| 2 mm |
1.49 kg / 3.29 lbs
1 949 Gs
|
0.22 kg / 0.49 lbs
224 g / 2.2 N
|
1.34 kg / 2.96 lbs
~0 Gs
|
| 3 mm |
1.39 kg / 3.06 lbs
1 883 Gs
|
0.21 kg / 0.46 lbs
209 g / 2.0 N
|
1.25 kg / 2.76 lbs
~0 Gs
|
| 5 mm |
1.16 kg / 2.55 lbs
1 717 Gs
|
0.17 kg / 0.38 lbs
174 g / 1.7 N
|
1.04 kg / 2.30 lbs
~0 Gs
|
| 10 mm |
0.60 kg / 1.33 lbs
1 238 Gs
|
0.09 kg / 0.20 lbs
90 g / 0.9 N
|
0.54 kg / 1.19 lbs
~0 Gs
|
| 20 mm |
0.12 kg / 0.26 lbs
548 Gs
|
0.02 kg / 0.04 lbs
18 g / 0.2 N
|
0.11 kg / 0.23 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
74 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
46 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
30 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
21 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
15 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
11 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (electronics) - warnings
MW 18x1.5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Car key | 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 18x1.5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
19.19 km/h
(5.33 m/s)
|
0.04 J | |
| 30 mm |
31.85 km/h
(8.85 m/s)
|
0.11 J | |
| 50 mm |
41.10 km/h
(11.42 m/s)
|
0.19 J | |
| 100 mm |
58.12 km/h
(16.15 m/s)
|
0.37 J |
Table 9: Coating parameters (durability)
MW 18x1.5 / 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 18x1.5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 519 Mx | 35.2 µWb |
| Pc Coefficient | 0.13 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 18x1.5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.95 kg | Standard |
| Water (riverbed) |
1.09 kg
(+0.14 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet holds only approx. 20-30% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Power loss vs temp
*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) = 0.13
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Advantages and disadvantages of neodymium magnets.
Pros
- They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
- They do not lose their magnetic properties even under strong external field,
- A magnet with a shiny gold surface has better aesthetics,
- Magnetic induction on the surface of the magnet turns out to be strong,
- 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 the possibility of precise shaping and adaptation to unique projects, NdFeB magnets can be created in a broad palette of forms and dimensions, which increases their versatility,
- Fundamental importance in innovative solutions – they are utilized in data components, electric drive systems, medical equipment, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in compact constructions
Limitations
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also increases their durability
- 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.
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in realizing nuts and complex shapes in magnets, we propose using casing - magnetic mount.
- Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical after entering the body.
- Due to neodymium price, their price is relatively high,
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what it depends on?
- with the application of a yoke made of special test steel, ensuring maximum field concentration
- whose thickness reaches at least 10 mm
- with a surface perfectly flat
- without any insulating layer between the magnet and steel
- under axial application of breakaway force (90-degree angle)
- at temperature room level
Determinants of practical lifting force of a magnet
- Gap between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
- Steel type – low-carbon steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
- Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
- Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the holding force is lower. In addition, even a small distance between the magnet and the plate lowers the holding force.
Safety rules for work with neodymium magnets
Shattering risk
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Do not underestimate power
Handle with care. Rare earth magnets act from a distance and connect with massive power, often quicker than you can move away.
Heat warning
Do not overheat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, look for HT versions (H, SH, UH).
Keep away from computers
Very strong magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.
Metal Allergy
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, immediately stop working with magnets and wear gloves.
Keep away from electronics
A strong magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.
Mechanical processing
Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.
Danger to pacemakers
Life threat: Strong magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.
Choking Hazard
Neodymium magnets are not intended for children. Swallowing several magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.
Bone fractures
Big blocks can break fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.
