MW 12x3 zestaw 896 szt. / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010563
GTIN/EAN: 5906301815556
- Diameter Ø
- 12 mm [±0,1 mm]
- Height
- 3 mm [±0,1 mm]
- Weight
- 2275.84 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
1099.97 zł net / pcs
1352.96 zł with VAT (23% VAT) / pcs
bulk discounts:
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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Technical of the product - MW 12x3 zestaw 896 szt. / N38 - cylindrical magnet
Specification / characteristics - MW 12x3 zestaw 896 szt. / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010563 |
| GTIN/EAN | 5906301815556 |
| Distributor | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 2275.84 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.49 kg / 24.43 N |
| Magnetic Induction ~ ? | 277.09 mT / 2771 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 |
Engineering analysis of the product - data
The following data are the result of a physical calculation. Results rely on algorithms for the class Nd2Fe14B. Actual conditions may deviate from the simulation results. Use these calculations as a reference point for designers.
Table 1: Static pull force (force vs gap) - interaction chart
MW 12x3 zestaw 896 szt. / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
2770 Gs
277.0 mT
|
2.49 kg / 5.49 LBS
2490.0 g / 24.4 N
|
strong |
| 1 mm |
2420 Gs
242.0 mT
|
1.90 kg / 4.19 LBS
1900.6 g / 18.6 N
|
safe |
| 2 mm |
2009 Gs
200.9 mT
|
1.31 kg / 2.89 LBS
1309.4 g / 12.8 N
|
safe |
| 3 mm |
1611 Gs
161.1 mT
|
0.84 kg / 1.86 LBS
842.7 g / 8.3 N
|
safe |
| 5 mm |
991 Gs
99.1 mT
|
0.32 kg / 0.70 LBS
318.7 g / 3.1 N
|
safe |
| 10 mm |
313 Gs
31.3 mT
|
0.03 kg / 0.07 LBS
31.8 g / 0.3 N
|
safe |
| 15 mm |
125 Gs
12.5 mT
|
0.01 kg / 0.01 LBS
5.1 g / 0.0 N
|
safe |
| 20 mm |
61 Gs
6.1 mT
|
0.00 kg / 0.00 LBS
1.2 g / 0.0 N
|
safe |
| 30 mm |
20 Gs
2.0 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
safe |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Shear force (wall)
MW 12x3 zestaw 896 szt. / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Raw steel (µ ≈ 0.2) |
0.50 kg / 1.10 LBS
498.0 g / 4.9 N
|
| 1 mm | Raw steel (µ ≈ 0.2) |
0.38 kg / 0.84 LBS
380.0 g / 3.7 N
|
| 2 mm | Raw steel (µ ≈ 0.2) |
0.26 kg / 0.58 LBS
262.0 g / 2.6 N
|
| 3 mm | Raw steel (µ ≈ 0.2) |
0.17 kg / 0.37 LBS
168.0 g / 1.6 N
|
| 5 mm | Raw steel (µ ≈ 0.2) |
0.06 kg / 0.14 LBS
64.0 g / 0.6 N
|
| 10 mm | Raw steel (µ ≈ 0.2) |
0.01 kg / 0.01 LBS
6.0 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 (sliding) - vertical pull
MW 12x3 zestaw 896 szt. / N38
| Surface type | Friction coefficient / % | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% of nominal force
|
0.75 kg / 1.65 LBS
747.0 g / 7.3 N
|
| Painted steel (standard) |
µ = 0.2
20% of nominal force
|
0.50 kg / 1.10 LBS
498.0 g / 4.9 N
|
| Oily/slippery steel |
µ = 0.1
10% of nominal force
|
0.25 kg / 0.55 LBS
249.0 g / 2.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% of nominal force
|
1.25 kg / 2.74 LBS
1245.0 g / 12.2 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 12x3 zestaw 896 szt. / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.25 kg / 0.55 LBS
249.0 g / 2.4 N
|
| 1 mm |
|
0.62 kg / 1.37 LBS
622.5 g / 6.1 N
|
| 2 mm |
|
1.25 kg / 2.74 LBS
1245.0 g / 12.2 N
|
| 3 mm |
|
1.87 kg / 4.12 LBS
1867.5 g / 18.3 N
|
| 5 mm |
|
2.49 kg / 5.49 LBS
2490.0 g / 24.4 N
|
| 10 mm |
|
2.49 kg / 5.49 LBS
2490.0 g / 24.4 N
|
| 11 mm |
|
2.49 kg / 5.49 LBS
2490.0 g / 24.4 N
|
| 12 mm |
|
2.49 kg / 5.49 LBS
2490.0 g / 24.4 N
|
Table 5: Thermal resistance (material behavior) - power drop
MW 12x3 zestaw 896 szt. / N38
| Magnet temperature (°C) | Force change relative to 20°C | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.49 kg / 5.49 LBS
2490.0 g / 24.4 N
|
Estimate |
| 40 °C | -4.4% |
2.38 kg / 5.25 LBS
2381.6 g / 23.4 N
|
Estimate |
| 60 °C | -8.6% |
2.28 kg / 5.02 LBS
2275.7 g / 22.3 N
|
Estimate |
| 80 °C | -12.8% |
2.17 kg / 4.79 LBS
2172.2 g / 21.3 N
|
Material limit |
| 100 °C | — | — | Out of range — no model |
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 12x3 zestaw 896 szt. / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
5.35 kg / 11.79 LBS
4 377 Gs
|
0.80 kg / 1.77 LBS
802 g / 7.9 N
|
N/A |
| 1 mm |
4.75 kg / 10.46 LBS
5 218 Gs
|
0.71 kg / 1.57 LBS
712 g / 7.0 N
|
4.27 kg / 9.42 LBS
~0 Gs
|
| 2 mm |
4.08 kg / 9.00 LBS
4 840 Gs
|
0.61 kg / 1.35 LBS
612 g / 6.0 N
|
3.67 kg / 8.10 LBS
~0 Gs
|
| 3 mm |
3.42 kg / 7.55 LBS
4 433 Gs
|
0.51 kg / 1.13 LBS
514 g / 5.0 N
|
3.08 kg / 6.80 LBS
~0 Gs
|
| 5 mm |
2.27 kg / 5.01 LBS
3 610 Gs
|
0.34 kg / 0.75 LBS
341 g / 3.3 N
|
2.04 kg / 4.51 LBS
~0 Gs
|
| 10 mm |
0.68 kg / 1.51 LBS
1 982 Gs
|
0.10 kg / 0.23 LBS
103 g / 1.0 N
|
0.62 kg / 1.36 LBS
~0 Gs
|
| 20 mm |
0.07 kg / 0.15 LBS
626 Gs
|
0.01 kg / 0.02 LBS
10 g / 0.1 N
|
0.06 kg / 0.14 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
67 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
41 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
27 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
18 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
13 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: Axial field levels — not safety zones
MW 12x3 zestaw 896 szt. / N38
| Field level (Gs) | mT | Model distance (cm) |
|---|---|---|
| < 5 Gs | < 0.5 mT | 5.0 cm |
| < 10 Gs | < 1.0 mT | 4.0 cm |
| < 20 Gs | < 2.0 mT | 3.5 cm |
| < 40 Gs | < 4.0 mT | 2.5 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: Impact energy (cracking risk) - warning
MW 12x3 zestaw 896 szt. / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
0.86 km/h
(0.24 m/s)
|
0.06 J | |
| 30 mm |
0.86 km/h
(0.24 m/s)
|
0.07 J | |
| 50 mm |
0.86 km/h
(0.24 m/s)
|
0.07 J | |
| 100 mm |
0.86 km/h
(0.24 m/s)
|
0.07 J |
Table 9: Corrosion resistance
MW 12x3 zestaw 896 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 (Pc)
MW 12x3 zestaw 896 szt. / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 483 Mx | 34.8 µWb |
| Pc Coefficient | 0.35 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 12x3 zestaw 896 szt. / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.49 kg | Standard |
| Water (riverbed) |
2.85 kg
(+0.36 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its max power.
2. Plate thickness effect
*Thin steel (e.g. 0.5mm PC case) severely limits the holding force.
3. Power loss vs temp
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) = 0.35
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.
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 offers
Pros as well as cons of neodymium magnets.
Strengths
- They have stable power, and over around 10 years their performance decreases symbolically – ~1% (in testing),
- Magnets very well resist against demagnetization caused by external fields,
- By applying a reflective layer of gold, the element has an aesthetic look,
- They are known for high magnetic induction at the operating surface, which affects their effectiveness,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- In view of the possibility of accurate shaping and adaptation to unique needs, magnetic components can be manufactured in a broad palette of shapes and sizes, which increases their versatility,
- Universal use in advanced technology sectors – they are utilized in computer drives, motor assemblies, medical equipment, as well as complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in compact constructions
Limitations
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
- Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in creating nuts and complicated forms in magnets, we propose using casing - magnetic holder.
- Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small elements of these devices are able to complicate diagnosis medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Pull force analysis
Highest magnetic holding force – what it depends on?
- on a block made of structural steel, perfectly concentrating the magnetic field
- possessing a thickness of min. 10 mm to ensure full flux closure
- with a plane free of scratches
- with total lack of distance (no paint)
- under perpendicular force vector (90-degree angle)
- in stable room temperature
Practical aspects of lifting capacity – factors
- Air gap (betwixt the magnet and the metal), since even a very small distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
- Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
- Plate material – mild steel attracts best. Alloy admixtures reduce magnetic properties and lifting capacity.
- Surface structure – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Temperature – heating the magnet results in weakening of force. Check the thermal limit for a given model.
Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.
H&S for magnets
Machining danger
Dust generated during machining of magnets is flammable. Do not drill into magnets unless you are an expert.
Handling guide
Handle with care. Rare earth magnets act from a distance and snap with huge force, often quicker than you can move away.
Crushing force
Large magnets can break fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.
Shattering risk
Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Avoid contact if allergic
Medical facts indicate that nickel (standard magnet coating) is a strong allergen. For allergy sufferers, avoid direct skin contact and select versions in plastic housing.
Choking Hazard
Only for adults. Small elements pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.
Threat to navigation
Note: neodymium magnets produce a field that interferes with precision electronics. Keep a safe distance from your phone, device, and navigation systems.
Cards and drives
Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.
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.
Health Danger
Individuals with a pacemaker should maintain an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.
