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
bulk discounts:
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Product card - 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 simulation of the product - technical parameters
Presented data represent the result of a engineering simulation. Values are based on algorithms for the material Nd2Fe14B. Actual conditions may deviate from the simulation results. Treat these calculations as a preliminary roadmap when designing systems.
Table 1: Static force (pull vs distance) - 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
|
medium risk |
| 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: Sliding 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: Wall mounting (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) - power losses
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: Two magnets (attraction) - forces in the system
MW 10x3 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (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: Hazards (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 |
| Mechanical watch | 20 Gs (2.0 mT) | 3.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Car key | 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: Coating parameters (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: Electrical 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. Vertical hold
*Caution: On a vertical surface, the magnet holds just a fraction of its max power.
2. Steel saturation
*Thin steel (e.g. 0.5mm PC case) significantly reduces the holding force.
3. Heat tolerance
*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.
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 |
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Advantages as well as disadvantages of rare earth magnets.
Strengths
- They retain full power for around 10 years – the drop is just ~1% (based on simulations),
- They retain their magnetic properties even under close interference source,
- A magnet with a metallic silver surface has better aesthetics,
- Magnetic induction on the surface of the magnet turns out to be exceptional,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Due to the possibility of flexible shaping and adaptation to custom needs, NdFeB magnets can be produced in a variety of geometric configurations, which expands the range of possible applications,
- Versatile presence in modern industrial fields – they find application in hard drives, motor assemblies, precision medical tools, as well as complex engineering applications.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Weaknesses
- Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- We recommend a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex shapes.
- Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these products can complicate diagnosis medical when they are in the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Best holding force of the magnet in ideal parameters – what affects it?
- with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
- with a cross-section minimum 10 mm
- characterized by even structure
- under conditions of ideal adhesion (surface-to-surface)
- under vertical application of breakaway force (90-degree angle)
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Clearance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Angle of force application – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
- Material composition – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
- Smoothness – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the holding force.
H&S for magnets
Safe distance
Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.
Respect the power
Exercise caution. Neodymium magnets act from a distance and connect with massive power, often quicker than you can move away.
Life threat
People with a ICD have to keep an absolute distance from magnets. The magnetic field can interfere with the operation of the implant.
Fire risk
Dust created during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Demagnetization risk
Watch the temperature. Exposing the magnet to high heat will permanently weaken its properties and pulling force.
Danger to the youngest
Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Store out of reach of children and animals.
Keep away from electronics
A strong magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Maintain magnets close to a device to avoid damaging the sensors.
Crushing risk
Big blocks can break fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.
Nickel coating and allergies
Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, cease handling magnets and wear gloves.
Beware of splinters
Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.
