MW 5x2 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010085
GTIN/EAN: 5906301810841
Diameter Ø
5 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
0.29 g
Magnetization Direction
↑ axial
Load capacity
0.70 kg / 6.83 N
Magnetic Induction
386.50 mT / 3865 Gs
Coating
[NiCuNi] Nickel
0.1845 ZŁ with VAT / pcs + price for transport
0.1500 ZŁ net + 23% VAT / pcs
bulk discounts:
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Detailed specification - MW 5x2 / N38 - cylindrical magnet
Specification / characteristics - MW 5x2 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010085 |
| GTIN/EAN | 5906301810841 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 0.29 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.70 kg / 6.83 N |
| Magnetic Induction ~ ? | 386.50 mT / 3865 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 are the direct effect of a engineering calculation. Values were calculated on models for the material Nd2Fe14B. Operational parameters might slightly deviate from the simulation results. Treat these calculations as a preliminary roadmap for designers.
Table 1: Static pull force (pull vs gap) - power drop
MW 5x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3860 Gs
386.0 mT
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
low risk |
| 1 mm |
2460 Gs
246.0 mT
|
0.28 kg / 0.63 pounds
284.4 g / 2.8 N
|
low risk |
| 2 mm |
1384 Gs
138.4 mT
|
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
|
low risk |
| 3 mm |
782 Gs
78.2 mT
|
0.03 kg / 0.06 pounds
28.8 g / 0.3 N
|
low risk |
| 5 mm |
293 Gs
29.3 mT
|
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
low risk |
| 10 mm |
55 Gs
5.5 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
| 15 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 20 mm |
8 Gs
0.8 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 30 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 50 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding force (vertical surface)
MW 5x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.14 kg / 0.31 pounds
140.0 g / 1.4 N
|
| 1 mm | Stal (~0.2) |
0.06 kg / 0.12 pounds
56.0 g / 0.5 N
|
| 2 mm | Stal (~0.2) |
0.02 kg / 0.04 pounds
18.0 g / 0.2 N
|
| 3 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 g / 0.1 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MW 5x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.14 kg / 0.31 pounds
140.0 g / 1.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.07 kg / 0.15 pounds
70.0 g / 0.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.35 kg / 0.77 pounds
350.0 g / 3.4 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 5x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.07 kg / 0.15 pounds
70.0 g / 0.7 N
|
| 1 mm |
|
0.18 kg / 0.39 pounds
175.0 g / 1.7 N
|
| 2 mm |
|
0.35 kg / 0.77 pounds
350.0 g / 3.4 N
|
| 3 mm |
|
0.52 kg / 1.16 pounds
525.0 g / 5.2 N
|
| 5 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
| 10 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
| 11 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
| 12 mm |
|
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
Table 5: Thermal resistance (material behavior) - power drop
MW 5x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.70 kg / 1.54 pounds
700.0 g / 6.9 N
|
OK |
| 40 °C | -2.2% |
0.68 kg / 1.51 pounds
684.6 g / 6.7 N
|
OK |
| 60 °C | -4.4% |
0.67 kg / 1.48 pounds
669.2 g / 6.6 N
|
|
| 80 °C | -6.6% |
0.65 kg / 1.44 pounds
653.8 g / 6.4 N
|
|
| 100 °C | -28.8% |
0.50 kg / 1.10 pounds
498.4 g / 4.9 N
|
Table 6: Two magnets (attraction) - field range
MW 5x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.80 kg / 3.98 pounds
5 236 Gs
|
0.27 kg / 0.60 pounds
271 g / 2.7 N
|
N/A |
| 1 mm |
1.21 kg / 2.68 pounds
6 336 Gs
|
0.18 kg / 0.40 pounds
182 g / 1.8 N
|
1.09 kg / 2.41 pounds
~0 Gs
|
| 2 mm |
0.73 kg / 1.62 pounds
4 921 Gs
|
0.11 kg / 0.24 pounds
110 g / 1.1 N
|
0.66 kg / 1.45 pounds
~0 Gs
|
| 3 mm |
0.42 kg / 0.92 pounds
3 711 Gs
|
0.06 kg / 0.14 pounds
62 g / 0.6 N
|
0.37 kg / 0.83 pounds
~0 Gs
|
| 5 mm |
0.13 kg / 0.29 pounds
2 071 Gs
|
0.02 kg / 0.04 pounds
19 g / 0.2 N
|
0.12 kg / 0.26 pounds
~0 Gs
|
| 10 mm |
0.01 kg / 0.02 pounds
587 Gs
|
0.00 kg / 0.00 pounds
2 g / 0.0 N
|
0.01 kg / 0.02 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
110 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
9 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
5 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
3 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
2 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
2 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 5x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 2.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 1.5 cm |
| Car key | 50 Gs (5.0 mT) | 1.5 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Dynamics (kinetic energy) - collision effects
MW 5x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
49.55 km/h
(13.77 m/s)
|
0.03 J | |
| 30 mm |
85.82 km/h
(23.84 m/s)
|
0.08 J | |
| 50 mm |
110.79 km/h
(30.78 m/s)
|
0.14 J | |
| 100 mm |
156.69 km/h
(43.52 m/s)
|
0.27 J |
Table 9: Anti-corrosion coating durability
MW 5x2 / 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 5x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 785 Mx | 7.9 µWb |
| Pc Coefficient | 0.50 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 5x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.70 kg | Standard |
| Water (riverbed) |
0.80 kg
(+0.10 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet holds only approx. 20-30% of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Heat tolerance
*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) = 0.50
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 deals
Pros and cons of rare earth magnets.
Strengths
- They have unchanged lifting capacity, and over nearly 10 years their attraction force decreases symbolically – ~1% (in testing),
- Magnets very well protect themselves against demagnetization caused by foreign field sources,
- In other words, due to the aesthetic finish of silver, the element gains visual value,
- Neodymium magnets achieve maximum magnetic induction on a their surface, which ensures high operational effectiveness,
- 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...
- Thanks to versatility in constructing and the ability to modify to unusual requirements,
- Huge importance in electronics industry – they are commonly used in HDD drives, motor assemblies, diagnostic systems, and other advanced devices.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Disadvantages
- Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We recommend cover - magnetic holder, due to difficulties in creating threads inside the magnet and complex forms.
- Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that small components of these devices can complicate diagnosis medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting capacity of the magnet – what it depends on?
- on a block made of structural steel, optimally conducting the magnetic flux
- whose thickness equals approx. 10 mm
- with a plane perfectly flat
- with zero gap (no impurities)
- during detachment in a direction perpendicular to the plane
- in temp. approx. 20°C
Lifting capacity in real conditions – factors
- Distance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Force direction – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
- Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
- Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
- Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was measured with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, whereas under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate reduces the holding force.
Warnings
Avoid contact if allergic
Certain individuals suffer from a contact allergy to nickel, which is the standard coating for NdFeB magnets. Frequent touching might lead to an allergic reaction. We strongly advise use protective gloves.
Fragile material
Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.
Thermal limits
Watch the temperature. Heating the magnet to high heat will ruin its magnetic structure and strength.
ICD Warning
Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or request help to work with the magnets.
Mechanical processing
Dust created during grinding of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
This is not a toy
Neodymium magnets are not suitable for play. Swallowing several magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires immediate surgery.
Immense force
Exercise caution. Neodymium magnets attract from a long distance and connect with massive power, often faster than you can react.
Serious injuries
Large magnets can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two attracting surfaces.
Keep away from electronics
A powerful magnetic field negatively affects the functioning of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to prevent breaking the sensors.
Protect data
Do not bring magnets near a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.
