MW 12x2 zestaw 1400 szt. / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010562
GTIN/EAN: 5906301815549
- Diameter Ø
- 12 mm [±0,1 mm]
- Height
- 2 mm [±0,1 mm]
- Weight
- 2380 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
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Need more?Frequently asked questions
Where can I buy strong cylindrical neodymium magnets?
Can a small cylindrical magnet provide a strong grip for precise workshop work?
Which cylindrical magnet can work at a higher temperature?
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 12x2 zestaw 1400 szt. / N38 - cylindrical magnet
Specification / characteristics - MW 12x2 zestaw 1400 szt. / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010562 |
| GTIN/EAN | 5906301815549 |
| Distributor | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 2380 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.39 kg / 13.66 N |
| Magnetic Induction ~ ? | 195.97 mT / 1960 Gs |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±0.1 mm |
Magnetic properties of material N38
| properties | values | units |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 |
Technical analysis of the assembly - technical parameters
Presented values constitute the direct effect of a mathematical analysis. Values are based on models for the class Nd2Fe14B. Actual parameters may differ from theoretical values. Treat these data as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs gap) - interaction chart
MW 12x2 zestaw 1400 szt. / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1959 Gs
195.9 mT
|
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
|
low risk |
| 1 mm |
1753 Gs
175.3 mT
|
1.11 kg / 2.45 LBS
1113.5 g / 10.9 N
|
low risk |
| 2 mm |
1479 Gs
147.9 mT
|
0.79 kg / 1.75 LBS
791.7 g / 7.8 N
|
low risk |
| 3 mm |
1196 Gs
119.6 mT
|
0.52 kg / 1.14 LBS
518.4 g / 5.1 N
|
low risk |
| 5 mm |
738 Gs
73.8 mT
|
0.20 kg / 0.44 LBS
197.4 g / 1.9 N
|
low risk |
| 10 mm |
229 Gs
22.9 mT
|
0.02 kg / 0.04 LBS
19.0 g / 0.2 N
|
low risk |
| 15 mm |
90 Gs
9.0 mT
|
0.00 kg / 0.01 LBS
2.9 g / 0.0 N
|
low risk |
| 20 mm |
43 Gs
4.3 mT
|
0.00 kg / 0.00 LBS
0.7 g / 0.0 N
|
low risk |
| 30 mm |
14 Gs
1.4 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
low risk |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage load (vertical surface)
MW 12x2 zestaw 1400 szt. / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Raw steel (µ ≈ 0.2) |
0.28 kg / 0.61 LBS
278.0 g / 2.7 N
|
| 1 mm | Raw steel (µ ≈ 0.2) |
0.22 kg / 0.49 LBS
222.0 g / 2.2 N
|
| 2 mm | Raw steel (µ ≈ 0.2) |
0.16 kg / 0.35 LBS
158.0 g / 1.5 N
|
| 3 mm | Raw steel (µ ≈ 0.2) |
0.10 kg / 0.23 LBS
104.0 g / 1.0 N
|
| 5 mm | Raw steel (µ ≈ 0.2) |
0.04 kg / 0.09 LBS
40.0 g / 0.4 N
|
| 10 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
| 15 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 12x2 zestaw 1400 szt. / N38
| Surface type | Friction coefficient / % | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% of nominal force
|
0.42 kg / 0.92 LBS
417.0 g / 4.1 N
|
| Painted steel (standard) |
µ = 0.2
20% of nominal force
|
0.28 kg / 0.61 LBS
278.0 g / 2.7 N
|
| Oily/slippery steel |
µ = 0.1
10% of nominal force
|
0.14 kg / 0.31 LBS
139.0 g / 1.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% of nominal force
|
0.70 kg / 1.53 LBS
695.0 g / 6.8 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 12x2 zestaw 1400 szt. / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.14 kg / 0.31 LBS
139.0 g / 1.4 N
|
| 1 mm |
|
0.35 kg / 0.77 LBS
347.5 g / 3.4 N
|
| 2 mm |
|
0.70 kg / 1.53 LBS
695.0 g / 6.8 N
|
| 3 mm |
|
1.04 kg / 2.30 LBS
1042.5 g / 10.2 N
|
| 5 mm |
|
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
|
| 10 mm |
|
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
|
| 11 mm |
|
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
|
| 12 mm |
|
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
|
Table 5: Thermal stability (material behavior) - thermal limit
MW 12x2 zestaw 1400 szt. / N38
| Magnet temperature (°C) | Force change relative to 20°C | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.39 kg / 3.06 LBS
1390.0 g / 13.6 N
|
Estimate |
| 40 °C | -4.4% |
1.33 kg / 2.93 LBS
1329.5 g / 13.0 N
|
Estimate |
| 60 °C | -8.6% |
1.27 kg / 2.80 LBS
1270.4 g / 12.5 N
|
Estimate |
| 80 °C | -12.8% |
1.21 kg / 2.67 LBS
1212.6 g / 11.9 N
|
Material limit |
| 100 °C | — | — | Out of range — no model |
Table 6: Two magnets (repulsion) - field range
MW 12x2 zestaw 1400 szt. / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.68 kg / 5.90 LBS
3 435 Gs
|
0.40 kg / 0.88 LBS
401 g / 3.9 N
|
N/A |
| 1 mm |
2.44 kg / 5.37 LBS
3 739 Gs
|
0.37 kg / 0.81 LBS
366 g / 3.6 N
|
2.19 kg / 4.84 LBS
~0 Gs
|
| 2 mm |
2.14 kg / 4.73 LBS
3 507 Gs
|
0.32 kg / 0.71 LBS
322 g / 3.2 N
|
1.93 kg / 4.25 LBS
~0 Gs
|
| 3 mm |
1.83 kg / 4.04 LBS
3 241 Gs
|
0.27 kg / 0.61 LBS
275 g / 2.7 N
|
1.65 kg / 3.63 LBS
~0 Gs
|
| 5 mm |
1.24 kg / 2.74 LBS
2 671 Gs
|
0.19 kg / 0.41 LBS
187 g / 1.8 N
|
1.12 kg / 2.47 LBS
~0 Gs
|
| 10 mm |
0.38 kg / 0.84 LBS
1 476 Gs
|
0.06 kg / 0.13 LBS
57 g / 0.6 N
|
0.34 kg / 0.75 LBS
~0 Gs
|
| 20 mm |
0.04 kg / 0.08 LBS
458 Gs
|
0.01 kg / 0.01 LBS
5 g / 0.1 N
|
0.03 kg / 0.07 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
47 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
28 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
18 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
13 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
9 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
7 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Axial field levels — not safety zones
MW 12x2 zestaw 1400 szt. / N38
| Field level (Gs) | mT | Model distance (cm) |
|---|---|---|
| < 5 Gs | < 0.5 mT | 4.5 cm |
| < 10 Gs | < 1.0 mT | 3.5 cm |
| < 20 Gs | < 2.0 mT | 3.0 cm |
| < 40 Gs | < 4.0 mT | 2.5 cm |
| < 50 Gs | < 5.0 mT | 2.0 cm |
| < 400 Gs | < 40.0 mT | 1.0 cm |
| < 600 Gs | < 60.0 mT | 1.0 cm |
Table 8: Impact energy (cracking risk) - collision effects
MW 12x2 zestaw 1400 szt. / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
0.65 km/h
(0.18 m/s)
|
0.04 J | |
| 30 mm |
0.65 km/h
(0.18 m/s)
|
0.04 J | |
| 50 mm |
0.65 km/h
(0.18 m/s)
|
0.04 J | |
| 100 mm |
0.65 km/h
(0.18 m/s)
|
0.04 J |
Table 9: Corrosion resistance
MW 12x2 zestaw 1400 szt. / 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 12x2 zestaw 1400 szt. / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 665 Mx | 26.7 µWb |
| Pc Coefficient | 0.25 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 12x2 zestaw 1400 szt. / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.39 kg | Standard |
| Water (riverbed) |
1.59 kg
(+0.20 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical wall, the magnet retains merely approx. 20-30% of its perpendicular strength.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Thermal stability
N38: the maximum material working temperature is 80°C. Permitted conditions also depend on the shape and magnetic circuit.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.25
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.
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Pros as well as cons of rare earth magnets.
Strengths
- They do not lose power, even during nearly 10 years – the decrease in lifting capacity is only ~1% (based on measurements),
- They do not lose their magnetic properties even under strong external field,
- By covering with a shiny layer of silver, the element has an elegant look,
- Magnets exhibit extremely high magnetic induction on the outer layer,
- 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...
- Possibility of accurate shaping as well as adapting to atypical needs,
- Versatile presence in high-tech industry – they serve a role in HDD drives, motor assemblies, precision medical tools, also other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Cons
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of making threads in the magnet and complex shapes - recommended is cover - mounting mechanism.
- Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small components of these magnets can disrupt the diagnostic process medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Lifting parameters
Maximum magnetic pulling force – what contributes to it?
- using a sheet made of mild steel, serving as a magnetic yoke
- with a cross-section of at least 10 mm
- characterized by smoothness
- without the slightest air gap between the magnet and steel
- under axial application of breakaway force (90-degree angle)
- at room temperature
Practical lifting capacity: influencing factors
- Air gap (betwixt the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, rust or debris).
- Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds significantly lower power (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).
- Metal type – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
- Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, reducing force.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost gain strength (up to a certain limit).
Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force 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
Safe operation
Before starting, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.
Magnetic media
Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can destroy these devices and erase data from cards.
Protective goggles
Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
ICD Warning
Warning for patients: Powerful magnets affect electronics. Keep at least 30 cm distance or ask another person to work with the magnets.
Dust explosion hazard
Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Avoid contact if allergic
Medical facts indicate that the nickel plating (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands and opt for versions in plastic housing.
Finger safety
Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
Maximum temperature
Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.
Danger to the youngest
Always store magnets out of reach of children. Choking hazard is high, and the consequences of magnets connecting inside the body are tragic.
Impact on smartphones
Note: neodymium magnets produce a field that interferes with precision electronics. Keep a separation from your phone, device, and GPS.
