MW 8x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010504
GTIN/EAN: 5906301814993
Diameter Ø
8 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
3.77 g
Magnetization Direction
↑ axial
Load capacity
1.84 kg / 18.00 N
Magnetic Induction
574.74 mT / 5747 Gs
Coating
[NiCuNi] Nickel
1.501 ZŁ with VAT / pcs + price for transport
1.220 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - MW 8x10 / N38 - cylindrical magnet
Specification / characteristics - MW 8x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010504 |
| GTIN/EAN | 5906301814993 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 8 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 3.77 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 1.84 kg / 18.00 N |
| Magnetic Induction ~ ? | 574.74 mT / 5747 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 |
Physical modeling of the magnet - technical parameters
These values represent the direct effect of a physical simulation. Values were calculated on models for the material Nd2Fe14B. Actual performance might slightly differ from theoretical values. Treat these data as a reference point for designers.
Table 1: Static force (pull vs distance) - characteristics
MW 8x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5742 Gs
574.2 mT
|
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
|
weak grip |
| 1 mm |
4323 Gs
432.3 mT
|
1.04 kg / 2.30 lbs
1043.0 g / 10.2 N
|
weak grip |
| 2 mm |
3109 Gs
310.9 mT
|
0.54 kg / 1.19 lbs
539.5 g / 5.3 N
|
weak grip |
| 3 mm |
2206 Gs
220.6 mT
|
0.27 kg / 0.60 lbs
271.6 g / 2.7 N
|
weak grip |
| 5 mm |
1149 Gs
114.9 mT
|
0.07 kg / 0.16 lbs
73.7 g / 0.7 N
|
weak grip |
| 10 mm |
323 Gs
32.3 mT
|
0.01 kg / 0.01 lbs
5.8 g / 0.1 N
|
weak grip |
| 15 mm |
131 Gs
13.1 mT
|
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
|
weak grip |
| 20 mm |
66 Gs
6.6 mT
|
0.00 kg / 0.00 lbs
0.2 g / 0.0 N
|
weak grip |
| 30 mm |
24 Gs
2.4 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
6 Gs
0.6 mT
|
0.00 kg / 0.00 lbs
0.0 g / 0.0 N
|
weak grip |
Table 2: Slippage force (vertical surface)
MW 8x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.37 kg / 0.81 lbs
368.0 g / 3.6 N
|
| 1 mm | Stal (~0.2) |
0.21 kg / 0.46 lbs
208.0 g / 2.0 N
|
| 2 mm | Stal (~0.2) |
0.11 kg / 0.24 lbs
108.0 g / 1.1 N
|
| 3 mm | Stal (~0.2) |
0.05 kg / 0.12 lbs
54.0 g / 0.5 N
|
| 5 mm | Stal (~0.2) |
0.01 kg / 0.03 lbs
14.0 g / 0.1 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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: Vertical assembly (shearing) - vertical pull
MW 8x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.55 kg / 1.22 lbs
552.0 g / 5.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.37 kg / 0.81 lbs
368.0 g / 3.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.18 kg / 0.41 lbs
184.0 g / 1.8 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.92 kg / 2.03 lbs
920.0 g / 9.0 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 8x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.18 kg / 0.41 lbs
184.0 g / 1.8 N
|
| 1 mm |
|
0.46 kg / 1.01 lbs
460.0 g / 4.5 N
|
| 2 mm |
|
0.92 kg / 2.03 lbs
920.0 g / 9.0 N
|
| 3 mm |
|
1.38 kg / 3.04 lbs
1380.0 g / 13.5 N
|
| 5 mm |
|
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
|
| 10 mm |
|
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
|
| 11 mm |
|
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
|
| 12 mm |
|
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 8x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
1.84 kg / 4.06 lbs
1840.0 g / 18.1 N
|
OK |
| 40 °C | -2.2% |
1.80 kg / 3.97 lbs
1799.5 g / 17.7 N
|
OK |
| 60 °C | -4.4% |
1.76 kg / 3.88 lbs
1759.0 g / 17.3 N
|
OK |
| 80 °C | -6.6% |
1.72 kg / 3.79 lbs
1718.6 g / 16.9 N
|
|
| 100 °C | -28.8% |
1.31 kg / 2.89 lbs
1310.1 g / 12.9 N
|
Table 6: Two magnets (repulsion) - field range
MW 8x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
10.22 kg / 22.52 lbs
6 064 Gs
|
1.53 kg / 3.38 lbs
1532 g / 15.0 N
|
N/A |
| 1 mm |
7.82 kg / 17.25 lbs
10 050 Gs
|
1.17 kg / 2.59 lbs
1174 g / 11.5 N
|
7.04 kg / 15.52 lbs
~0 Gs
|
| 2 mm |
5.79 kg / 12.77 lbs
8 646 Gs
|
0.87 kg / 1.92 lbs
869 g / 8.5 N
|
5.21 kg / 11.49 lbs
~0 Gs
|
| 3 mm |
4.19 kg / 9.25 lbs
7 358 Gs
|
0.63 kg / 1.39 lbs
629 g / 6.2 N
|
3.77 kg / 8.32 lbs
~0 Gs
|
| 5 mm |
2.13 kg / 4.69 lbs
5 238 Gs
|
0.32 kg / 0.70 lbs
319 g / 3.1 N
|
1.91 kg / 4.22 lbs
~0 Gs
|
| 10 mm |
0.41 kg / 0.90 lbs
2 299 Gs
|
0.06 kg / 0.14 lbs
61 g / 0.6 N
|
0.37 kg / 0.81 lbs
~0 Gs
|
| 20 mm |
0.03 kg / 0.07 lbs
646 Gs
|
0.00 kg / 0.01 lbs
5 g / 0.0 N
|
0.03 kg / 0.06 lbs
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 lbs
76 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
47 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
31 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
22 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
16 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
12 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (implants) - warnings
MW 8x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 3.5 cm |
| Phone / Smartphone | 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: Collisions (cracking risk) - collision effects
MW 8x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
22.32 km/h
(6.20 m/s)
|
0.07 J | |
| 30 mm |
38.59 km/h
(10.72 m/s)
|
0.22 J | |
| 50 mm |
49.82 km/h
(13.84 m/s)
|
0.36 J | |
| 100 mm |
70.46 km/h
(19.57 m/s)
|
0.72 J |
Table 9: Surface protection spec
MW 8x10 / 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 8x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 3 040 Mx | 30.4 µWb |
| Pc Coefficient | 1.00 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 8x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 1.84 kg | Standard |
| Water (riverbed) |
2.11 kg
(+0.27 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical wall, the magnet retains only ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) severely reduces the holding force.
3. Heat tolerance
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.00
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.
Material specification
| 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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Advantages and disadvantages of neodymium magnets.
Pros
- They retain attractive force for around ten years – the drop is just ~1% (according to analyses),
- They do not lose their magnetic properties even under external field action,
- In other words, due to the metallic finish of nickel, the element is aesthetically pleasing,
- They are known for high magnetic induction at the operating surface, which improves attraction properties,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
- Possibility of precise machining and adjusting to complex requirements,
- Versatile presence in modern industrial fields – they are used in mass storage devices, motor assemblies, precision medical tools, also modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- At strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of creating threads in the magnet and complicated shapes - preferred is casing - mounting mechanism.
- Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these products can be problematic in diagnostics medical in case of swallowing.
- Due to complex production process, their price exceeds standard values,
Lifting parameters
Highest magnetic holding force – what contributes to it?
- with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by even structure
- under conditions of ideal adhesion (metal-to-metal)
- during detachment in a direction perpendicular to the mounting surface
- at ambient temperature room level
Lifting capacity in real conditions – factors
- Air gap (between the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
- Angle of force application – highest force is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
- Steel type – mild steel attracts best. Alloy admixtures decrease magnetic permeability and holding force.
- Surface quality – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
- Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the holding force.
Warnings
Fragile material
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Clashing of two magnets leads to them breaking into small pieces.
Crushing risk
Big blocks can crush fingers instantly. Never put your hand between two attracting surfaces.
Cards and drives
Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Maximum temperature
Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.
Handling guide
Handle magnets consciously. Their powerful strength can shock even experienced users. Be vigilant and respect their force.
Phone sensors
A powerful magnetic field disrupts the operation of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to prevent breaking the sensors.
Implant safety
Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to work with the magnets.
Do not give to children
Absolutely store magnets out of reach of children. Risk of swallowing is high, and the effects of magnets clamping inside the body are life-threatening.
Dust is flammable
Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.
Allergy Warning
Studies show that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, prevent touching magnets with bare hands and opt for versions in plastic housing.
