MW 10x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010004
GTIN/EAN: 5906301810032
Diameter Ø
10 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
5.89 g
Magnetization Direction
↑ axial
Load capacity
3.18 kg / 31.15 N
Magnetic Induction
553.84 mT / 5538 Gs
Coating
[NiCuNi] Nickel
4.31 ZŁ with VAT / pcs + price for transport
3.50 ZŁ net + 23% VAT / pcs
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Technical details - MW 10x10 / N38 - cylindrical magnet
Specification / characteristics - MW 10x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010004 |
| GTIN/EAN | 5906301810032 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 5.89 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 3.18 kg / 31.15 N |
| Magnetic Induction ~ ? | 553.84 mT / 5538 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 |
Engineering modeling of the assembly - technical parameters
These information constitute the direct effect of a engineering simulation. Values rely on algorithms for the material Nd2Fe14B. Real-world performance may differ. Use these calculations as a reference point when designing systems.
Table 1: Static force (pull vs gap) - power drop
MW 10x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5534 Gs
553.4 mT
|
3.18 kg / 7.01 pounds
3180.0 g / 31.2 N
|
strong |
| 1 mm |
4428 Gs
442.8 mT
|
2.04 kg / 4.49 pounds
2036.1 g / 20.0 N
|
strong |
| 2 mm |
3420 Gs
342.0 mT
|
1.21 kg / 2.68 pounds
1214.8 g / 11.9 N
|
low risk |
| 3 mm |
2597 Gs
259.7 mT
|
0.70 kg / 1.54 pounds
700.2 g / 6.9 N
|
low risk |
| 5 mm |
1498 Gs
149.8 mT
|
0.23 kg / 0.51 pounds
232.9 g / 2.3 N
|
low risk |
| 10 mm |
469 Gs
46.9 mT
|
0.02 kg / 0.05 pounds
22.9 g / 0.2 N
|
low risk |
| 15 mm |
198 Gs
19.8 mT
|
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
|
low risk |
| 20 mm |
101 Gs
10.1 mT
|
0.00 kg / 0.00 pounds
1.1 g / 0.0 N
|
low risk |
| 30 mm |
36 Gs
3.6 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
| 50 mm |
9 Gs
0.9 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage hold (vertical surface)
MW 10x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.64 kg / 1.40 pounds
636.0 g / 6.2 N
|
| 1 mm | Stal (~0.2) |
0.41 kg / 0.90 pounds
408.0 g / 4.0 N
|
| 2 mm | Stal (~0.2) |
0.24 kg / 0.53 pounds
242.0 g / 2.4 N
|
| 3 mm | Stal (~0.2) |
0.14 kg / 0.31 pounds
140.0 g / 1.4 N
|
| 5 mm | Stal (~0.2) |
0.05 kg / 0.10 pounds
46.0 g / 0.5 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
MW 10x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.95 kg / 2.10 pounds
954.0 g / 9.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.64 kg / 1.40 pounds
636.0 g / 6.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.32 kg / 0.70 pounds
318.0 g / 3.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.59 kg / 3.51 pounds
1590.0 g / 15.6 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 10x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.32 kg / 0.70 pounds
318.0 g / 3.1 N
|
| 1 mm |
|
0.80 kg / 1.75 pounds
795.0 g / 7.8 N
|
| 2 mm |
|
1.59 kg / 3.51 pounds
1590.0 g / 15.6 N
|
| 3 mm |
|
2.39 kg / 5.26 pounds
2385.0 g / 23.4 N
|
| 5 mm |
|
3.18 kg / 7.01 pounds
3180.0 g / 31.2 N
|
| 10 mm |
|
3.18 kg / 7.01 pounds
3180.0 g / 31.2 N
|
| 11 mm |
|
3.18 kg / 7.01 pounds
3180.0 g / 31.2 N
|
| 12 mm |
|
3.18 kg / 7.01 pounds
3180.0 g / 31.2 N
|
Table 5: Thermal stability (stability) - resistance threshold
MW 10x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
3.18 kg / 7.01 pounds
3180.0 g / 31.2 N
|
OK |
| 40 °C | -2.2% |
3.11 kg / 6.86 pounds
3110.0 g / 30.5 N
|
OK |
| 60 °C | -4.4% |
3.04 kg / 6.70 pounds
3040.1 g / 29.8 N
|
OK |
| 80 °C | -6.6% |
2.97 kg / 6.55 pounds
2970.1 g / 29.1 N
|
|
| 100 °C | -28.8% |
2.26 kg / 4.99 pounds
2264.2 g / 22.2 N
|
Table 6: Magnet-Magnet interaction (attraction) - forces in the system
MW 10x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
14.83 kg / 32.69 pounds
6 003 Gs
|
2.22 kg / 4.90 pounds
2224 g / 21.8 N
|
N/A |
| 1 mm |
12.01 kg / 26.48 pounds
9 962 Gs
|
1.80 kg / 3.97 pounds
1802 g / 17.7 N
|
10.81 kg / 23.83 pounds
~0 Gs
|
| 2 mm |
9.50 kg / 20.93 pounds
8 857 Gs
|
1.42 kg / 3.14 pounds
1424 g / 14.0 N
|
8.55 kg / 18.84 pounds
~0 Gs
|
| 3 mm |
7.38 kg / 16.27 pounds
7 809 Gs
|
1.11 kg / 2.44 pounds
1107 g / 10.9 N
|
6.64 kg / 14.64 pounds
~0 Gs
|
| 5 mm |
4.31 kg / 9.50 pounds
5 968 Gs
|
0.65 kg / 1.43 pounds
647 g / 6.3 N
|
3.88 kg / 8.55 pounds
~0 Gs
|
| 10 mm |
1.09 kg / 2.39 pounds
2 996 Gs
|
0.16 kg / 0.36 pounds
163 g / 1.6 N
|
0.98 kg / 2.16 pounds
~0 Gs
|
| 20 mm |
0.11 kg / 0.24 pounds
939 Gs
|
0.02 kg / 0.04 pounds
16 g / 0.2 N
|
0.10 kg / 0.21 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
116 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
73 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
49 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
34 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
25 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
19 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MW 10x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 6.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 4.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.0 cm |
| Car key | 50 Gs (5.0 mT) | 3.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Collisions (kinetic energy) - warning
MW 10x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
23.54 km/h
(6.54 m/s)
|
0.13 J | |
| 30 mm |
40.59 km/h
(11.27 m/s)
|
0.37 J | |
| 50 mm |
52.40 km/h
(14.56 m/s)
|
0.62 J | |
| 100 mm |
74.10 km/h
(20.58 m/s)
|
1.25 J |
Table 9: Corrosion resistance
MW 10x10 / 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 10x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 481 Mx | 44.8 µWb |
| Pc Coefficient | 0.89 | High (Stable) |
Table 11: Physics of underwater searching
MW 10x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 3.18 kg | Standard |
| Water (riverbed) |
3.64 kg
(+0.46 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Warning: On a vertical surface, the magnet retains only ~20% of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) significantly limits the holding force.
3. Power loss vs temp
*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) = 0.89
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Strengths and weaknesses of neodymium magnets.
Pros
- They do not lose magnetism, even during around 10 years – the drop in lifting capacity is only ~1% (according to tests),
- They have excellent resistance to magnetic field loss due to opposing magnetic fields,
- By applying a lustrous coating of nickel, the element acquires an modern look,
- The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Possibility of detailed shaping as well as adjusting to defined applications,
- Significant place in high-tech industry – they are commonly used in mass storage devices, electric motors, precision medical tools, and modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in compact constructions
Disadvantages
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
- 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 extremely resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- Limited ability of making threads in the magnet and complex forms - recommended is casing - magnetic holder.
- Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. Furthermore, small components of these devices can disrupt the diagnostic process medical when they are in the body.
- With budget limitations the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum magnetic pulling force – what affects it?
- on a plate made of mild steel, effectively closing the magnetic flux
- whose thickness reaches at least 10 mm
- with an ground contact surface
- under conditions of ideal adhesion (metal-to-metal)
- during detachment in a direction perpendicular to the mounting surface
- at temperature approx. 20 degrees Celsius
Magnet lifting force in use – key factors
- Clearance – existence of any layer (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
- Metal type – different alloys reacts the same. Alloy additives weaken the attraction effect.
- Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Roughness creates an air distance.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity was determined by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the holding force.
Safety rules for work with NdFeB magnets
Magnets are brittle
Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Eye protection is mandatory.
Keep away from electronics
A strong magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Maintain magnets close to a device to prevent damaging the sensors.
Do not underestimate power
Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.
Heat sensitivity
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.
Allergic reactions
Some people have a sensitization to nickel, which is the common plating for NdFeB magnets. Extended handling may cause a rash. We strongly advise wear protective gloves.
Crushing force
Large magnets can break fingers in a fraction of a second. Do not put your hand betwixt two strong magnets.
Pacemakers
Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.
Swallowing risk
Always keep magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are very dangerous.
Fire warning
Machining of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Safe distance
Avoid bringing magnets near a purse, computer, or TV. The magnetism can destroy these devices and wipe information from cards.
