MW 5x3 zestaw 50 szt. / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010546
GTIN/EAN: 5906301815372
- Diameter Ø
- 5 mm [±0,1 mm]
- Height
- 3 mm [±0,1 mm]
- Weight
- 22 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
17.47 zł net / pcs
21.49 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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Technical data - MW 5x3 zestaw 50 szt. / N38 - cylindrical magnet
Specification / characteristics - MW 5x3 zestaw 50 szt. / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010546 |
| GTIN/EAN | 5906301815372 |
| Distributor | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 22 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.84 kg / 8.25 N |
| Magnetic Induction ~ ? | 475.16 mT / 4752 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 |
Physical analysis of the assembly - report
The following information constitute the result of a mathematical analysis. Results rely on algorithms for the material Nd2Fe14B. Real-world parameters may differ from theoretical values. Treat these calculations as a preliminary roadmap when designing systems.
Table 1: Static pull force (force vs gap) - power drop
MW 5x3 zestaw 50 szt. / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4745 Gs
474.5 mT
|
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
|
low risk |
| 1 mm |
2955 Gs
295.5 mT
|
0.33 kg / 0.72 LBS
325.8 g / 3.2 N
|
low risk |
| 2 mm |
1672 Gs
167.2 mT
|
0.10 kg / 0.23 LBS
104.4 g / 1.0 N
|
low risk |
| 3 mm |
960 Gs
96.0 mT
|
0.03 kg / 0.08 LBS
34.4 g / 0.3 N
|
low risk |
| 5 mm |
372 Gs
37.2 mT
|
0.01 kg / 0.01 LBS
5.2 g / 0.1 N
|
low risk |
| 10 mm |
74 Gs
7.4 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
low risk |
| 15 mm |
25 Gs
2.5 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 20 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 30 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage load (wall)
MW 5x3 zestaw 50 szt. / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Raw steel (µ ≈ 0.2) |
0.17 kg / 0.37 LBS
168.0 g / 1.6 N
|
| 1 mm | Raw steel (µ ≈ 0.2) |
0.07 kg / 0.15 LBS
66.0 g / 0.6 N
|
| 2 mm | Raw steel (µ ≈ 0.2) |
0.02 kg / 0.04 LBS
20.0 g / 0.2 N
|
| 3 mm | Raw steel (µ ≈ 0.2) |
0.01 kg / 0.01 LBS
6.0 g / 0.1 N
|
| 5 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 10 mm | Raw steel (µ ≈ 0.2) |
0.00 kg / 0.00 LBS
0.0 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) - vertical pull
MW 5x3 zestaw 50 szt. / N38
| Surface type | Friction coefficient / % | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% of nominal force
|
0.25 kg / 0.56 LBS
252.0 g / 2.5 N
|
| Painted steel (standard) |
µ = 0.2
20% of nominal force
|
0.17 kg / 0.37 LBS
168.0 g / 1.6 N
|
| Oily/slippery steel |
µ = 0.1
10% of nominal force
|
0.08 kg / 0.19 LBS
84.0 g / 0.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% of nominal force
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 5x3 zestaw 50 szt. / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.08 kg / 0.19 LBS
84.0 g / 0.8 N
|
| 1 mm |
|
0.21 kg / 0.46 LBS
210.0 g / 2.1 N
|
| 2 mm |
|
0.42 kg / 0.93 LBS
420.0 g / 4.1 N
|
| 3 mm |
|
0.63 kg / 1.39 LBS
630.0 g / 6.2 N
|
| 5 mm |
|
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
|
| 10 mm |
|
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
|
| 11 mm |
|
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
|
| 12 mm |
|
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
|
Table 5: Working in heat (material behavior) - thermal limit
MW 5x3 zestaw 50 szt. / N38
| Magnet temperature (°C) | Force change relative to 20°C | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
|
Estimate |
| 40 °C | -4.4% |
0.80 kg / 1.77 LBS
803.4 g / 7.9 N
|
Estimate |
| 60 °C | -8.6% |
0.77 kg / 1.69 LBS
767.7 g / 7.5 N
|
Estimate |
| 80 °C | -12.8% |
0.73 kg / 1.62 LBS
732.8 g / 7.2 N
|
Material limit |
| 100 °C | — | — | Out of range — no model |
Table 6: Two magnets (attraction) - field collision
MW 5x3 zestaw 50 szt. / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
2.73 kg / 6.01 LBS
5 700 Gs
|
0.41 kg / 0.90 LBS
409 g / 4.0 N
|
N/A |
| 1 mm |
1.77 kg / 3.91 LBS
7 658 Gs
|
0.27 kg / 0.59 LBS
266 g / 2.6 N
|
1.60 kg / 3.52 LBS
~0 Gs
|
| 2 mm |
1.06 kg / 2.33 LBS
5 910 Gs
|
0.16 kg / 0.35 LBS
159 g / 1.6 N
|
0.95 kg / 2.10 LBS
~0 Gs
|
| 3 mm |
0.60 kg / 1.33 LBS
4 460 Gs
|
0.09 kg / 0.20 LBS
90 g / 0.9 N
|
0.54 kg / 1.19 LBS
~0 Gs
|
| 5 mm |
0.19 kg / 0.42 LBS
2 520 Gs
|
0.03 kg / 0.06 LBS
29 g / 0.3 N
|
0.17 kg / 0.38 LBS
~0 Gs
|
| 10 mm |
0.02 kg / 0.04 LBS
745 Gs
|
0.00 kg / 0.01 LBS
3 g / 0.0 N
|
0.02 kg / 0.03 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
147 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 50 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
|
| 60 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
|
| 70 mm |
0.00 kg / 0.00 LBS
5 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
3 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
2 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
2 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 5x3 zestaw 50 szt. / N38
| Field level (Gs) | mT | Model distance (cm) |
|---|---|---|
| < 5 Gs | < 0.5 mT | 3.0 cm |
| < 10 Gs | < 1.0 mT | 2.5 cm |
| < 20 Gs | < 2.0 mT | 2.0 cm |
| < 40 Gs | < 4.0 mT | 1.5 cm |
| < 50 Gs | < 5.0 mT | 1.5 cm |
| < 400 Gs | < 40.0 mT | 0.5 cm |
| < 600 Gs | < 60.0 mT | 0.5 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 5x3 zestaw 50 szt. / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
3.14 km/h
(0.87 m/s)
|
0.01 J | |
| 30 mm |
3.14 km/h
(0.87 m/s)
|
0.01 J | |
| 50 mm |
3.14 km/h
(0.87 m/s)
|
0.01 J | |
| 100 mm |
3.14 km/h
(0.87 m/s)
|
0.01 J |
Table 9: Anti-corrosion coating durability
MW 5x3 zestaw 50 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 5x3 zestaw 50 szt. / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 942 Mx | 9.4 µWb |
| Pc Coefficient | 0.66 | High (Stable) |
Table 11: Physics of underwater searching
MW 5x3 zestaw 50 szt. / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.84 kg | Standard |
| Water (riverbed) |
0.96 kg
(+0.12 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet holds just approx. 20-30% of its nominal pull.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically weakens 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) = 0.66
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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths as well as weaknesses of rare earth magnets.
Strengths
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
- Magnets very well resist against loss of magnetization caused by ambient magnetic noise,
- Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver-plated gives an professional appearance,
- Magnetic induction on the working part of the magnet is maximum,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
- Thanks to freedom in constructing and the capacity to adapt to specific needs,
- Universal use in innovative solutions – they serve a role in computer drives, brushless drives, medical devices, as well as modern systems.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Limitations
- At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing nuts and complex forms in magnets, we recommend using a housing - magnetic mount.
- Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these magnets can be problematic in diagnostics medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Pull force analysis
Magnetic strength at its maximum – what affects it?
- with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- with a cross-section of at least 10 mm
- characterized by smoothness
- under conditions of no distance (metal-to-metal)
- during detachment in a direction vertical to the plane
- at room temperature
Key elements affecting lifting force
- Distance – the presence of foreign body (rust, tape, gap) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Material composition – not every steel attracts identically. Alloy additives worsen the attraction effect.
- Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
- Thermal environment – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.
Warnings
Nickel allergy
Certain individuals suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Extended handling can result in skin redness. We recommend use safety gloves.
Fragile material
Protect your eyes. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.
Serious injuries
Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!
Cards and drives
Do not bring magnets close to a purse, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.
Compass and GPS
Navigation devices and smartphones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.
Health Danger
Patients with a heart stimulator should keep an absolute distance from magnets. The magnetism can disrupt the operation of the implant.
Do not underestimate power
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Combustion hazard
Combustion risk: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.
Demagnetization risk
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.
Adults only
Only for adults. Small elements can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.
