MW 10x3 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010008
GTIN/EAN: 5906301810070
Diameter Ø
10 mm [±0,1 mm]
Height
3 mm [±0,1 mm]
Weight
1.77 g
Magnetization Direction
↑ axial
Load capacity
2.15 kg / 21.04 N
Magnetic Induction
318.70 mT / 3187 Gs
Coating
[NiCuNi] Nickel
0.726 ZŁ with VAT / pcs + price for transport
0.590 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 10x3 / N38 - cylindrical magnet
Specification / characteristics - MW 10x3 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010008 |
| GTIN/EAN | 5906301810070 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 3 mm [±0,1 mm] |
| Weight | 1.77 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.15 kg / 21.04 N |
| Magnetic Induction ~ ? | 318.70 mT / 3187 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 - data
The following information are the direct effect of a mathematical analysis. Results are based on algorithms for the class Nd2Fe14B. Operational conditions may differ from theoretical values. Treat these data as a preliminary roadmap for designers.
Table 1: Static pull force (force vs gap) - power drop
MW 10x3 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3185 Gs
318.5 mT
|
2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
|
strong |
| 1 mm |
2657 Gs
265.7 mT
|
1.50 kg / 3.30 LBS
1496.2 g / 14.7 N
|
safe |
| 2 mm |
2081 Gs
208.1 mT
|
0.92 kg / 2.02 LBS
918.1 g / 9.0 N
|
safe |
| 3 mm |
1573 Gs
157.3 mT
|
0.52 kg / 1.16 LBS
524.4 g / 5.1 N
|
safe |
| 5 mm |
874 Gs
87.4 mT
|
0.16 kg / 0.36 LBS
161.7 g / 1.6 N
|
safe |
| 10 mm |
241 Gs
24.1 mT
|
0.01 kg / 0.03 LBS
12.3 g / 0.1 N
|
safe |
| 15 mm |
92 Gs
9.2 mT
|
0.00 kg / 0.00 LBS
1.8 g / 0.0 N
|
safe |
| 20 mm |
44 Gs
4.4 mT
|
0.00 kg / 0.00 LBS
0.4 g / 0.0 N
|
safe |
| 30 mm |
14 Gs
1.4 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
safe |
Table 2: Shear force (vertical surface)
MW 10x3 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.43 kg / 0.95 LBS
430.0 g / 4.2 N
|
| 1 mm | Stal (~0.2) |
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
| 2 mm | Stal (~0.2) |
0.18 kg / 0.41 LBS
184.0 g / 1.8 N
|
| 3 mm | Stal (~0.2) |
0.10 kg / 0.23 LBS
104.0 g / 1.0 N
|
| 5 mm | Stal (~0.2) |
0.03 kg / 0.07 LBS
32.0 g / 0.3 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 10x3 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.64 kg / 1.42 LBS
645.0 g / 6.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.43 kg / 0.95 LBS
430.0 g / 4.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.22 kg / 0.47 LBS
215.0 g / 2.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.08 kg / 2.37 LBS
1075.0 g / 10.5 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 10x3 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.22 kg / 0.47 LBS
215.0 g / 2.1 N
|
| 1 mm |
|
0.54 kg / 1.18 LBS
537.5 g / 5.3 N
|
| 2 mm |
|
1.08 kg / 2.37 LBS
1075.0 g / 10.5 N
|
| 3 mm |
|
1.61 kg / 3.55 LBS
1612.5 g / 15.8 N
|
| 5 mm |
|
2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
|
| 10 mm |
|
2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
|
| 11 mm |
|
2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
|
| 12 mm |
|
2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
|
Table 5: Thermal stability (stability) - power drop
MW 10x3 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.15 kg / 4.74 LBS
2150.0 g / 21.1 N
|
OK |
| 40 °C | -2.2% |
2.10 kg / 4.64 LBS
2102.7 g / 20.6 N
|
OK |
| 60 °C | -4.4% |
2.06 kg / 4.53 LBS
2055.4 g / 20.2 N
|
|
| 80 °C | -6.6% |
2.01 kg / 4.43 LBS
2008.1 g / 19.7 N
|
|
| 100 °C | -28.8% |
1.53 kg / 3.37 LBS
1530.8 g / 15.0 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 10x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.91 kg / 10.83 LBS
4 754 Gs
|
0.74 kg / 1.62 LBS
737 g / 7.2 N
|
N/A |
| 1 mm |
4.18 kg / 9.22 LBS
5 877 Gs
|
0.63 kg / 1.38 LBS
627 g / 6.2 N
|
3.76 kg / 8.30 LBS
~0 Gs
|
| 2 mm |
3.42 kg / 7.54 LBS
5 314 Gs
|
0.51 kg / 1.13 LBS
513 g / 5.0 N
|
3.08 kg / 6.78 LBS
~0 Gs
|
| 3 mm |
2.71 kg / 5.98 LBS
4 732 Gs
|
0.41 kg / 0.90 LBS
407 g / 4.0 N
|
2.44 kg / 5.38 LBS
~0 Gs
|
| 5 mm |
1.59 kg / 3.52 LBS
3 630 Gs
|
0.24 kg / 0.53 LBS
239 g / 2.3 N
|
1.44 kg / 3.16 LBS
~0 Gs
|
| 10 mm |
0.37 kg / 0.81 LBS
1 747 Gs
|
0.06 kg / 0.12 LBS
55 g / 0.5 N
|
0.33 kg / 0.73 LBS
~0 Gs
|
| 20 mm |
0.03 kg / 0.06 LBS
483 Gs
|
0.00 kg / 0.01 LBS
4 g / 0.0 N
|
0.03 kg / 0.06 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
48 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
29 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
19 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
13 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
9 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
7 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) - warnings
MW 10x3 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 4.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 3.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 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 10x3 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
35.27 km/h
(9.80 m/s)
|
0.08 J | |
| 30 mm |
60.88 km/h
(16.91 m/s)
|
0.25 J | |
| 50 mm |
78.60 km/h
(21.83 m/s)
|
0.42 J | |
| 100 mm |
111.15 km/h
(30.88 m/s)
|
0.84 J |
Table 9: Anti-corrosion coating durability
MW 10x3 / 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: Construction data (Pc)
MW 10x3 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 2 694 Mx | 26.9 µWb |
| Pc Coefficient | 0.40 | Low (Flat) |
Table 11: Physics of underwater searching
MW 10x3 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.15 kg | Standard |
| Water (riverbed) |
2.46 kg
(+0.31 kg buoyancy gain)
|
+14.5% |
1. Shear force
*Warning: On a vertical surface, the magnet holds merely ~20% of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) drastically weakens 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) = 0.40
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also offers
Advantages and disadvantages of rare earth magnets.
Advantages
- Their magnetic field remains stable, and after approximately ten years it decreases only by ~1% (according to research),
- They show high resistance to demagnetization induced by external disturbances,
- The use of an metallic coating of noble metals (nickel, gold, silver) causes the element to look better,
- They are known for high magnetic induction at the operating surface, which increases their power,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to the potential of flexible molding and adaptation to custom projects, NdFeB magnets can be created in a broad palette of geometric configurations, which expands the range of possible applications,
- Significant place in innovative solutions – they find application in computer drives, electromotive mechanisms, advanced medical instruments, as well as industrial machines.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- Neodymium magnets lose 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 stability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Limited ability of making threads in the magnet and complicated shapes - preferred is casing - magnet mounting.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these magnets are able to be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Optimal lifting capacity of a neodymium magnet – what it depends on?
- with the application of a sheet made of special test steel, ensuring maximum field concentration
- whose thickness equals approx. 10 mm
- with an polished contact surface
- without any insulating layer between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Practical lifting capacity: influencing factors
- Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Angle of force application – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
- Chemical composition of the base – low-carbon steel attracts best. Alloy admixtures decrease magnetic properties and lifting capacity.
- Plate texture – ground elements guarantee perfect abutment, which improves force. Rough surfaces reduce efficiency.
- Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Precautions when working with neodymium magnets
Serious injuries
Big blocks can crush fingers instantly. Do not place your hand between two strong magnets.
Pacemakers
Patients with a pacemaker should keep an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.
Product not for children
Neodymium magnets are not intended for children. Eating multiple magnets can lead to them pinching intestinal walls, which poses a severe health hazard and requires urgent medical intervention.
Electronic devices
Do not bring magnets near a purse, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.
Immense force
Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Be predictive.
Shattering risk
NdFeB magnets are ceramic materials, which means they are very brittle. Collision of two magnets will cause them breaking into shards.
Phone sensors
A strong magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Do not bring magnets near a device to avoid damaging the sensors.
Power loss in heat
Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.
Dust is flammable
Powder produced during grinding of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
Skin irritation risks
Certain individuals have a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Frequent touching might lead to dermatitis. We suggest wear safety gloves.
