MW 10x4 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010010
GTIN/EAN: 5906301810094
Diameter Ø
10 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
2.36 g
Magnetization Direction
↑ axial
Load capacity
2.80 kg / 27.42 N
Magnetic Induction
386.91 mT / 3869 Gs
Coating
[NiCuNi] Nickel
1.021 ZŁ with VAT / pcs + price for transport
0.830 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 10x4 / N38 - cylindrical magnet
Specification / characteristics - MW 10x4 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010010 |
| GTIN/EAN | 5906301810094 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 4 mm [±0,1 mm] |
| Weight | 2.36 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.80 kg / 27.42 N |
| Magnetic Induction ~ ? | 386.91 mT / 3869 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 analysis of the magnet - technical parameters
Presented data are the result of a engineering analysis. Values rely on algorithms for the class Nd2Fe14B. Operational parameters may differ from theoretical values. Please consider these data as a preliminary roadmap during assembly planning.
Table 1: Static pull force (force vs gap) - power drop
MW 10x4 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3867 Gs
386.7 mT
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
warning |
| 1 mm |
3168 Gs
316.8 mT
|
1.88 kg / 4.14 LBS
1879.8 g / 18.4 N
|
low risk |
| 2 mm |
2460 Gs
246.0 mT
|
1.13 kg / 2.50 LBS
1133.7 g / 11.1 N
|
low risk |
| 3 mm |
1855 Gs
185.5 mT
|
0.64 kg / 1.42 LBS
644.6 g / 6.3 N
|
low risk |
| 5 mm |
1036 Gs
103.6 mT
|
0.20 kg / 0.44 LBS
200.9 g / 2.0 N
|
low risk |
| 10 mm |
293 Gs
29.3 mT
|
0.02 kg / 0.04 LBS
16.1 g / 0.2 N
|
low risk |
| 15 mm |
114 Gs
11.4 mT
|
0.00 kg / 0.01 LBS
2.4 g / 0.0 N
|
low risk |
| 20 mm |
55 Gs
5.5 mT
|
0.00 kg / 0.00 LBS
0.6 g / 0.0 N
|
low risk |
| 30 mm |
18 Gs
1.8 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
low risk |
| 50 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding capacity (wall)
MW 10x4 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
| 1 mm | Stal (~0.2) |
0.38 kg / 0.83 LBS
376.0 g / 3.7 N
|
| 2 mm | Stal (~0.2) |
0.23 kg / 0.50 LBS
226.0 g / 2.2 N
|
| 3 mm | Stal (~0.2) |
0.13 kg / 0.28 LBS
128.0 g / 1.3 N
|
| 5 mm | Stal (~0.2) |
0.04 kg / 0.09 LBS
40.0 g / 0.4 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MW 10x4 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.84 kg / 1.85 LBS
840.0 g / 8.2 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.56 kg / 1.23 LBS
560.0 g / 5.5 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.28 kg / 0.62 LBS
280.0 g / 2.7 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.40 kg / 3.09 LBS
1400.0 g / 13.7 N
|
Table 4: Steel thickness (saturation) - power losses
MW 10x4 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.28 kg / 0.62 LBS
280.0 g / 2.7 N
|
| 1 mm |
|
0.70 kg / 1.54 LBS
700.0 g / 6.9 N
|
| 2 mm |
|
1.40 kg / 3.09 LBS
1400.0 g / 13.7 N
|
| 3 mm |
|
2.10 kg / 4.63 LBS
2100.0 g / 20.6 N
|
| 5 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
| 10 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
| 11 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
| 12 mm |
|
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
Table 5: Thermal resistance (material behavior) - resistance threshold
MW 10x4 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.80 kg / 6.17 LBS
2800.0 g / 27.5 N
|
OK |
| 40 °C | -2.2% |
2.74 kg / 6.04 LBS
2738.4 g / 26.9 N
|
OK |
| 60 °C | -4.4% |
2.68 kg / 5.90 LBS
2676.8 g / 26.3 N
|
|
| 80 °C | -6.6% |
2.62 kg / 5.77 LBS
2615.2 g / 25.7 N
|
|
| 100 °C | -28.8% |
1.99 kg / 4.40 LBS
1993.6 g / 19.6 N
|
Table 6: Two magnets (repulsion) - field range
MW 10x4 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
7.24 kg / 15.96 LBS
5 247 Gs
|
1.09 kg / 2.39 LBS
1086 g / 10.7 N
|
N/A |
| 1 mm |
6.04 kg / 13.31 LBS
7 061 Gs
|
0.91 kg / 2.00 LBS
905 g / 8.9 N
|
5.43 kg / 11.98 LBS
~0 Gs
|
| 2 mm |
4.86 kg / 10.71 LBS
6 336 Gs
|
0.73 kg / 1.61 LBS
729 g / 7.2 N
|
4.37 kg / 9.64 LBS
~0 Gs
|
| 3 mm |
3.81 kg / 8.41 LBS
5 612 Gs
|
0.57 kg / 1.26 LBS
572 g / 5.6 N
|
3.43 kg / 7.56 LBS
~0 Gs
|
| 5 mm |
2.22 kg / 4.90 LBS
4 283 Gs
|
0.33 kg / 0.73 LBS
333 g / 3.3 N
|
2.00 kg / 4.41 LBS
~0 Gs
|
| 10 mm |
0.52 kg / 1.15 LBS
2 071 Gs
|
0.08 kg / 0.17 LBS
78 g / 0.8 N
|
0.47 kg / 1.03 LBS
~0 Gs
|
| 20 mm |
0.04 kg / 0.09 LBS
587 Gs
|
0.01 kg / 0.01 LBS
6 g / 0.1 N
|
0.04 kg / 0.08 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
61 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
37 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
24 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
16 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
12 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
9 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 10x4 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.5 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 10x4 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
34.86 km/h
(9.68 m/s)
|
0.11 J | |
| 30 mm |
60.17 km/h
(16.71 m/s)
|
0.33 J | |
| 50 mm |
77.68 km/h
(21.58 m/s)
|
0.55 J | |
| 100 mm |
109.85 km/h
(30.51 m/s)
|
1.10 J |
Table 9: Surface protection spec
MW 10x4 / 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 10x4 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 142 Mx | 31.4 µWb |
| Pc Coefficient | 0.50 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 10x4 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.80 kg | Standard |
| Water (riverbed) |
3.21 kg
(+0.41 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Note: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.
2. Plate thickness effect
*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.
3. Temperature resistance
*For N38 material, the critical limit 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also products
Strengths and weaknesses of rare earth magnets.
Advantages
- Their magnetic field is maintained, and after approximately 10 years it decreases only by ~1% (theoretically),
- They maintain their magnetic properties even under strong external field,
- A magnet with a shiny silver surface has an effective appearance,
- Magnetic induction on the working part of the magnet is very high,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
- Possibility of precise machining and modifying to atypical applications,
- Fundamental importance in future technologies – they find application in computer drives, drive modules, diagnostic systems, as well as technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in small systems
Disadvantages
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power 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 oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- We suggest a housing - magnetic holder, due to difficulties in producing nuts inside the magnet and complicated shapes.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small components of these products are able to complicate diagnosis medical in case of swallowing.
- Due to neodymium price, their price is higher than average,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what it depends on?
- with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- with a thickness of at least 10 mm
- with a plane free of scratches
- under conditions of ideal adhesion (metal-to-metal)
- for force acting at a right angle (in the magnet axis)
- at standard ambient temperature
Impact of factors on magnetic holding capacity in practice
- Distance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces power 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 significantly, often to levels of 20-30% of the nominal value.
- Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
- Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal reduce efficiency.
- Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate decreases the holding force.
Safe handling of NdFeB magnets
Choking Hazard
Strictly keep magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are fatal.
Threat to navigation
Note: neodymium magnets produce a field that interferes with sensitive sensors. Keep a separation from your phone, device, and navigation systems.
Protective goggles
NdFeB magnets are sintered ceramics, which means they are prone to chipping. Clashing of two magnets leads to them breaking into small pieces.
Demagnetization risk
Keep cool. Neodymium magnets are sensitive to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).
Respect the power
Exercise caution. Neodymium magnets act from a long distance and connect with huge force, often quicker than you can react.
Warning for heart patients
Life threat: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.
Safe distance
Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.
Nickel coating and allergies
Some people experience a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact can result in an allergic reaction. We recommend wear protective gloves.
Hand protection
Danger of trauma: The pulling power is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.
Flammability
Dust created during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.
