MW 8x8 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010106
GTIN/EAN: 5906301811053
Diameter Ø
8 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
3.02 g
Magnetization Direction
↑ axial
Load capacity
2.03 kg / 19.92 N
Magnetic Induction
553.67 mT / 5537 Gs
Coating
[NiCuNi] Nickel
1.341 ZŁ with VAT / pcs + price for transport
1.090 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us now
+48 22 499 98 98
alternatively drop us a message via
inquiry form
through our site.
Lifting power along with form of a magnet can be checked using our
force calculator.
Same-day processing for orders placed before 14:00.
Technical - MW 8x8 / N38 - cylindrical magnet
Specification / characteristics - MW 8x8 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010106 |
| GTIN/EAN | 5906301811053 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 8 mm [±0,1 mm] |
| Height | 8 mm [±0,1 mm] |
| Weight | 3.02 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.03 kg / 19.92 N |
| Magnetic Induction ~ ? | 553.67 mT / 5537 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 assembly - report
Presented information are the direct effect of a physical calculation. Results rely on algorithms for the class Nd2Fe14B. Real-world performance may differ from theoretical values. Use these calculations as a preliminary roadmap when designing systems.
Table 1: Static pull force (force vs distance) - characteristics
MW 8x8 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5531 Gs
553.1 mT
|
2.03 kg / 4.48 LBS
2030.0 g / 19.9 N
|
medium risk |
| 1 mm |
4162 Gs
416.2 mT
|
1.15 kg / 2.53 LBS
1149.3 g / 11.3 N
|
low risk |
| 2 mm |
2984 Gs
298.4 mT
|
0.59 kg / 1.30 LBS
590.7 g / 5.8 N
|
low risk |
| 3 mm |
2107 Gs
210.7 mT
|
0.29 kg / 0.65 LBS
294.5 g / 2.9 N
|
low risk |
| 5 mm |
1084 Gs
108.4 mT
|
0.08 kg / 0.17 LBS
78.0 g / 0.8 N
|
low risk |
| 10 mm |
296 Gs
29.6 mT
|
0.01 kg / 0.01 LBS
5.8 g / 0.1 N
|
low risk |
| 15 mm |
118 Gs
11.8 mT
|
0.00 kg / 0.00 LBS
0.9 g / 0.0 N
|
low risk |
| 20 mm |
58 Gs
5.8 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
low risk |
| 30 mm |
20 Gs
2.0 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage hold (vertical surface)
MW 8x8 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.41 kg / 0.90 LBS
406.0 g / 4.0 N
|
| 1 mm | Stal (~0.2) |
0.23 kg / 0.51 LBS
230.0 g / 2.3 N
|
| 2 mm | Stal (~0.2) |
0.12 kg / 0.26 LBS
118.0 g / 1.2 N
|
| 3 mm | Stal (~0.2) |
0.06 kg / 0.13 LBS
58.0 g / 0.6 N
|
| 5 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
16.0 g / 0.2 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 (sliding) - behavior on slippery surfaces
MW 8x8 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.61 kg / 1.34 LBS
609.0 g / 6.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.41 kg / 0.90 LBS
406.0 g / 4.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.20 kg / 0.45 LBS
203.0 g / 2.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.02 kg / 2.24 LBS
1015.0 g / 10.0 N
|
Table 4: Material efficiency (saturation) - power losses
MW 8x8 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.20 kg / 0.45 LBS
203.0 g / 2.0 N
|
| 1 mm |
|
0.51 kg / 1.12 LBS
507.5 g / 5.0 N
|
| 2 mm |
|
1.02 kg / 2.24 LBS
1015.0 g / 10.0 N
|
| 3 mm |
|
1.52 kg / 3.36 LBS
1522.5 g / 14.9 N
|
| 5 mm |
|
2.03 kg / 4.48 LBS
2030.0 g / 19.9 N
|
| 10 mm |
|
2.03 kg / 4.48 LBS
2030.0 g / 19.9 N
|
| 11 mm |
|
2.03 kg / 4.48 LBS
2030.0 g / 19.9 N
|
| 12 mm |
|
2.03 kg / 4.48 LBS
2030.0 g / 19.9 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 8x8 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.03 kg / 4.48 LBS
2030.0 g / 19.9 N
|
OK |
| 40 °C | -2.2% |
1.99 kg / 4.38 LBS
1985.3 g / 19.5 N
|
OK |
| 60 °C | -4.4% |
1.94 kg / 4.28 LBS
1940.7 g / 19.0 N
|
OK |
| 80 °C | -6.6% |
1.90 kg / 4.18 LBS
1896.0 g / 18.6 N
|
|
| 100 °C | -28.8% |
1.45 kg / 3.19 LBS
1445.4 g / 14.2 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 8x8 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
9.48 kg / 20.90 LBS
6 000 Gs
|
1.42 kg / 3.14 LBS
1422 g / 14.0 N
|
N/A |
| 1 mm |
7.26 kg / 16.01 LBS
9 682 Gs
|
1.09 kg / 2.40 LBS
1089 g / 10.7 N
|
6.54 kg / 14.41 LBS
~0 Gs
|
| 2 mm |
5.37 kg / 11.83 LBS
8 324 Gs
|
0.81 kg / 1.78 LBS
805 g / 7.9 N
|
4.83 kg / 10.65 LBS
~0 Gs
|
| 3 mm |
3.88 kg / 8.55 LBS
7 074 Gs
|
0.58 kg / 1.28 LBS
582 g / 5.7 N
|
3.49 kg / 7.69 LBS
~0 Gs
|
| 5 mm |
1.95 kg / 4.30 LBS
5 016 Gs
|
0.29 kg / 0.64 LBS
292 g / 2.9 N
|
1.75 kg / 3.87 LBS
~0 Gs
|
| 10 mm |
0.36 kg / 0.80 LBS
2 169 Gs
|
0.05 kg / 0.12 LBS
55 g / 0.5 N
|
0.33 kg / 0.72 LBS
~0 Gs
|
| 20 mm |
0.03 kg / 0.06 LBS
592 Gs
|
0.00 kg / 0.01 LBS
4 g / 0.0 N
|
0.02 kg / 0.05 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
66 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
41 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
27 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
19 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
14 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
10 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 8x8 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.0 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: Impact energy (cracking risk) - warning
MW 8x8 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
26.19 km/h
(7.28 m/s)
|
0.08 J | |
| 30 mm |
45.29 km/h
(12.58 m/s)
|
0.24 J | |
| 50 mm |
58.47 km/h
(16.24 m/s)
|
0.40 J | |
| 100 mm |
82.68 km/h
(22.97 m/s)
|
0.80 J |
Table 9: Surface protection spec
MW 8x8 / 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 8x8 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 868 Mx | 28.7 µWb |
| Pc Coefficient | 0.89 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MW 8x8 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.03 kg | Standard |
| Water (riverbed) |
2.32 kg
(+0.29 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical wall, the magnet holds merely a fraction of its perpendicular strength.
2. Plate thickness effect
*Thin steel (e.g. computer case) significantly reduces the holding force.
3. Power loss vs temp
*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) = 0.89
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
Strengths as well as weaknesses of neodymium magnets.
Pros
- They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (according to theory),
- Magnets very well resist against loss of magnetization caused by ambient magnetic noise,
- By using a decorative coating of gold, the element gains an professional look,
- Magnets possess huge magnetic induction on the active area,
- 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 designing and the ability to adapt to individual projects,
- Universal use in innovative solutions – they are utilized in HDD drives, brushless drives, advanced medical instruments, and modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in small systems
Limitations
- At strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- Limited possibility of making nuts in the magnet and complex forms - preferred is cover - magnet mounting.
- Possible danger to health – tiny shards 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 elements of these magnets can be problematic in diagnostics medical after entering the body.
- Due to expensive raw materials, their price exceeds standard values,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- on a block made of structural steel, effectively closing the magnetic flux
- whose transverse dimension is min. 10 mm
- characterized by lack of roughness
- with zero gap (without paint)
- under vertical force vector (90-degree angle)
- at temperature approx. 20 degrees Celsius
Lifting capacity in practice – influencing factors
- Gap (between the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
- Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
- Base massiveness – too thin steel causes magnetic saturation, causing part of the flux to be wasted to the other side.
- Material composition – not every steel attracts identically. Alloy additives weaken the interaction with the magnet.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate reduces the holding force.
Safe handling of neodymium magnets
Implant safety
For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or request help to work with the magnets.
Crushing force
Mind your fingers. Two powerful magnets will snap together instantly with a force of massive weight, destroying anything in their path. Exercise extreme caution!
Mechanical processing
Fire warning: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.
Do not give to children
Always store magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are life-threatening.
Power loss in heat
Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will destroy its properties and strength.
Keep away from electronics
Note: rare earth magnets generate a field that interferes with precision electronics. Maintain a safe distance from your phone, device, and GPS.
Eye protection
Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.
Powerful field
Exercise caution. Neodymium magnets act from a distance and connect with huge force, often quicker than you can move away.
Warning for allergy sufferers
Certain individuals suffer from a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Extended handling may cause a rash. We suggest wear safety gloves.
Electronic hazard
Data protection: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).
