MW 12x4 zestaw 560 szt. / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010564
GTIN/EAN: 5906301815563
- Diameter Ø
- 12 mm [±0,1 mm]
- Height
- 4 mm [±0,1 mm]
- Weight
- 1898.4 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
554.55 zł net / pcs
682.10 zł with VAT (23% VAT) / pcs
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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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Detailed specification - MW 12x4 zestaw 560 szt. / N38 - cylindrical magnet
Specification / characteristics - MW 12x4 zestaw 560 szt. / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010564 |
| GTIN/EAN | 5906301815563 |
| Distributor | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 1898.4 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.45 kg / 33.83 N |
| Magnetic Induction ~ ? | 343.64 mT / 3436 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 simulation of the magnet - technical parameters
The following information constitute the direct effect of a mathematical analysis. Results rely on models for the class Nd2Fe14B. Actual conditions might slightly differ from theoretical values. Treat these data as a reference point for designers.
Table 1: Static pull force (force vs gap) - characteristics
MW 12x4 zestaw 560 szt. / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3435 Gs
343.5 mT
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
strong |
| 1 mm |
2950 Gs
295.0 mT
|
2.54 kg / 5.61 lbs
2544.7 g / 25.0 N
|
strong |
| 2 mm |
2423 Gs
242.3 mT
|
1.72 kg / 3.79 lbs
1717.5 g / 16.8 N
|
low risk |
| 3 mm |
1935 Gs
193.5 mT
|
1.09 kg / 2.41 lbs
1094.6 g / 10.7 N
|
low risk |
| 5 mm |
1190 Gs
119.0 mT
|
0.41 kg / 0.91 lbs
413.8 g / 4.1 N
|
low risk |
| 10 mm |
382 Gs
38.2 mT
|
0.04 kg / 0.09 lbs
42.7 g / 0.4 N
|
low risk |
| 15 mm |
156 Gs
15.6 mT
|
0.01 kg / 0.02 lbs
7.1 g / 0.1 N
|
low risk |
| 20 mm |
76 Gs
7.6 mT
|
0.00 kg / 0.00 lbs
1.7 g / 0.0 N
|
low risk |
| 30 mm |
26 Gs
2.6 mT
|
0.00 kg / 0.00 lbs
0.2 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: Shear force (wall)
MW 12x4 zestaw 560 szt. / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Raw steel (µ ≈ 0.2) |
0.69 kg / 1.52 lbs
690.0 g / 6.8 N
|
| 1 mm | Raw steel (µ ≈ 0.2) |
0.51 kg / 1.12 lbs
508.0 g / 5.0 N
|
| 2 mm | Raw steel (µ ≈ 0.2) |
0.34 kg / 0.76 lbs
344.0 g / 3.4 N
|
| 3 mm | Raw steel (µ ≈ 0.2) |
0.22 kg / 0.48 lbs
218.0 g / 2.1 N
|
| 5 mm | Raw steel (µ ≈ 0.2) |
0.08 kg / 0.18 lbs
82.0 g / 0.8 N
|
| 10 mm | Raw steel (µ ≈ 0.2) |
0.01 kg / 0.02 lbs
8.0 g / 0.1 N
|
| 15 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 lbs
2.0 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) - vertical pull
MW 12x4 zestaw 560 szt. / N38
| Surface type | Friction coefficient / % | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% of nominal force
|
1.04 kg / 2.28 lbs
1035.0 g / 10.2 N
|
| Painted steel (standard) |
µ = 0.2
20% of nominal force
|
0.69 kg / 1.52 lbs
690.0 g / 6.8 N
|
| Oily/slippery steel |
µ = 0.1
10% of nominal force
|
0.35 kg / 0.76 lbs
345.0 g / 3.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% of nominal force
|
1.73 kg / 3.80 lbs
1725.0 g / 16.9 N
|
Table 4: Material efficiency (saturation) - power losses
MW 12x4 zestaw 560 szt. / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.35 kg / 0.76 lbs
345.0 g / 3.4 N
|
| 1 mm |
|
0.86 kg / 1.90 lbs
862.5 g / 8.5 N
|
| 2 mm |
|
1.73 kg / 3.80 lbs
1725.0 g / 16.9 N
|
| 3 mm |
|
2.59 kg / 5.70 lbs
2587.5 g / 25.4 N
|
| 5 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
| 10 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
| 11 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
| 12 mm |
|
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 12x4 zestaw 560 szt. / N38
| Magnet temperature (°C) | Force change relative to 20°C | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.45 kg / 7.61 lbs
3450.0 g / 33.8 N
|
Estimate |
| 40 °C | -4.4% |
3.30 kg / 7.27 lbs
3299.9 g / 32.4 N
|
Estimate |
| 60 °C | -8.6% |
3.15 kg / 6.95 lbs
3153.1 g / 30.9 N
|
Estimate |
| 80 °C | -12.8% |
3.01 kg / 6.64 lbs
3009.6 g / 29.5 N
|
Material limit |
| 100 °C | — | — | Out of range — no model |
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 12x4 zestaw 560 szt. / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
8.23 kg / 18.13 lbs
4 952 Gs
|
1.23 kg / 2.72 lbs
1234 g / 12.1 N
|
N/A |
| 1 mm |
7.16 kg / 15.79 lbs
6 410 Gs
|
1.07 kg / 2.37 lbs
1074 g / 10.5 N
|
6.45 kg / 14.21 lbs
~0 Gs
|
| 2 mm |
6.07 kg / 13.38 lbs
5 900 Gs
|
0.91 kg / 2.01 lbs
910 g / 8.9 N
|
5.46 kg / 12.04 lbs
~0 Gs
|
| 3 mm |
5.03 kg / 11.09 lbs
5 372 Gs
|
0.75 kg / 1.66 lbs
754 g / 7.4 N
|
4.53 kg / 9.98 lbs
~0 Gs
|
| 5 mm |
3.29 kg / 7.25 lbs
4 342 Gs
|
0.49 kg / 1.09 lbs
493 g / 4.8 N
|
2.96 kg / 6.52 lbs
~0 Gs
|
| 10 mm |
0.99 kg / 2.18 lbs
2 379 Gs
|
0.15 kg / 0.33 lbs
148 g / 1.5 N
|
0.89 kg / 1.96 lbs
~0 Gs
|
| 20 mm |
0.10 kg / 0.22 lbs
764 Gs
|
0.02 kg / 0.03 lbs
15 g / 0.1 N
|
0.09 kg / 0.20 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
85 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
52 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
34 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
23 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
17 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
12 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 12x4 zestaw 560 szt. / N38
| Field level (Gs) | mT | Model distance (cm) |
|---|---|---|
| < 5 Gs | < 0.5 mT | 5.5 cm |
| < 10 Gs | < 1.0 mT | 4.5 cm |
| < 20 Gs | < 2.0 mT | 3.5 cm |
| < 40 Gs | < 4.0 mT | 3.0 cm |
| < 50 Gs | < 5.0 mT | 2.5 cm |
| < 400 Gs | < 40.0 mT | 1.0 cm |
| < 600 Gs | < 60.0 mT | 1.0 cm |
Table 8: Collisions (cracking risk) - collision effects
MW 12x4 zestaw 560 szt. / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
1.08 km/h
(0.30 m/s)
|
0.09 J | |
| 30 mm |
1.09 km/h
(0.30 m/s)
|
0.09 J | |
| 50 mm |
1.09 km/h
(0.30 m/s)
|
0.09 J | |
| 100 mm |
1.09 km/h
(0.30 m/s)
|
0.09 J |
Table 9: Surface protection spec
MW 12x4 zestaw 560 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: Electrical data (Flux)
MW 12x4 zestaw 560 szt. / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 114 Mx | 41.1 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Submerged application
MW 12x4 zestaw 560 szt. / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.45 kg | Standard |
| Water (riverbed) |
3.95 kg
(+0.50 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Note: On a vertical surface, the magnet retains only ~20% of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically weakens the holding force.
3. Heat tolerance
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) = 0.44
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.
Chemical composition
| 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
Pros and cons of Nd2Fe14B magnets.
Pros
- They have unchanged lifting capacity, and over nearly 10 years their performance decreases symbolically – ~1% (according to theory),
- Neodymium magnets are remarkably resistant to magnetic field loss caused by external magnetic fields,
- A magnet with a shiny nickel surface is more attractive,
- Neodymium magnets achieve maximum magnetic induction on a small surface, which ensures high operational effectiveness,
- Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to versatility in constructing and the capacity to customize to complex applications,
- Huge importance in innovative solutions – they are utilized in computer drives, electric drive systems, medical devices, as well as technologically advanced constructions.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
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.
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Due to limitations in realizing threads and complicated shapes in magnets, we propose using casing - magnetic holder.
- Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these magnets can disrupt the diagnostic process medical when they are in the body.
- Due to neodymium price, their price exceeds standard values,
Holding force characteristics
Magnetic strength at its maximum – what it depends on?
- on a block made of structural steel, perfectly concentrating the magnetic field
- whose thickness equals approx. 10 mm
- with a plane free of scratches
- without any insulating layer between the magnet and steel
- during pulling in a direction vertical to the plane
- at temperature room level
Key elements affecting lifting force
- Air gap (betwixt the magnet and the metal), as even a very small distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, rust or debris).
- Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of maximum force).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
- Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a small distance between the magnet and the plate lowers the lifting capacity.
H&S for magnets
Thermal limits
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.
Metal Allergy
A percentage of the population have a sensitization to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact may cause skin redness. We strongly advise use safety gloves.
Impact on smartphones
GPS units and smartphones are highly susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.
Electronic hazard
Data protection: Strong magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).
Flammability
Powder created during machining of magnets is combustible. Do not drill into magnets unless you are an expert.
Medical implants
Warning for patients: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.
Beware of splinters
Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
Immense force
Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.
Bone fractures
Large magnets can smash fingers in a fraction of a second. Never place your hand between two strong magnets.
Do not give to children
Strictly store magnets out of reach of children. Ingestion danger is high, and the consequences of magnets connecting inside the body are tragic.
