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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Physical properties - 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 assembly - technical parameters
Presented information represent the outcome of a physical calculation. Results are based on models for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Use these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs gap) - characteristics
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
|
strong |
| 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: Shear capacity (vertical surface)
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) - behavior on slippery surfaces
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: Material efficiency (saturation) - sheet metal selection
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: Working in heat (material behavior) - thermal limit
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) | Sliding 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 |
| Car key | 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: Collisions (cracking risk) - warning
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
*Warning: On a vertical surface, the magnet retains only approx. 20-30% of its nominal pull.
2. Steel saturation
*Thin steel (e.g. computer case) severely reduces the holding force.
3. Temperature resistance
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.50
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.
Elemental analysis
| 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also proposals
Pros and cons of neodymium magnets.
Benefits
- They do not lose power, even over approximately ten years – the decrease in power is only ~1% (based on measurements),
- They do not lose their magnetic properties even under strong external field,
- Thanks to the smooth finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an professional appearance,
- Magnets possess exceptionally strong magnetic induction on the outer layer,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for action at temperatures reaching 230°C and above...
- Possibility of individual modeling as well as optimizing to complex applications,
- Huge importance in advanced technology sectors – they are utilized in hard drives, electric drive systems, medical devices, as well as other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Weaknesses
- To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets suffer a drop in power. 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
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in creating threads and complex shapes in magnets, we propose using casing - magnetic mount.
- Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small components of these devices are able to disrupt the diagnostic process medical when they are in the body.
- With mass production the cost of neodymium magnets can be a barrier,
Holding force characteristics
Maximum lifting force for a neodymium magnet – what contributes to it?
- using a sheet made of high-permeability steel, serving as a magnetic yoke
- with a thickness no less than 10 mm
- with an polished touching surface
- under conditions of ideal adhesion (metal-to-metal)
- during detachment in a direction vertical to the plane
- at ambient temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Direction of force – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
- Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
- Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
- Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
- Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet’s surface and the plate reduces the holding force.
H&S for magnets
Finger safety
Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.
Danger to pacemakers
People with a pacemaker must keep an large gap from magnets. The magnetic field can disrupt the operation of the life-saving device.
Power loss in heat
Watch the temperature. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.
Threat to navigation
Note: neodymium magnets generate a field that disrupts precision electronics. Maintain a separation from your phone, device, and navigation systems.
Eye protection
Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.
Keep away from children
Adult use only. Tiny parts can be swallowed, leading to serious injuries. Keep away from children and animals.
Keep away from computers
Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).
Allergy Warning
Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, avoid direct skin contact and opt for encased magnets.
Dust is flammable
Machining of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
Conscious usage
Handle magnets with awareness. Their huge power can shock even professionals. Stay alert and respect their force.
