MW 10x15 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010005
GTIN/EAN: 5906301810049
Diameter Ø
10 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
8.84 g
Magnetization Direction
↑ axial
Load capacity
2.60 kg / 25.51 N
Magnetic Induction
587.44 mT / 5874 Gs
Coating
[NiCuNi] Nickel
6.15 ZŁ with VAT / pcs + price for transport
5.00 ZŁ net + 23% VAT / pcs
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Physical properties - MW 10x15 / N38 - cylindrical magnet
Specification / characteristics - MW 10x15 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010005 |
| GTIN/EAN | 5906301810049 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 10 mm [±0,1 mm] |
| Height | 15 mm [±0,1 mm] |
| Weight | 8.84 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 2.60 kg / 25.51 N |
| Magnetic Induction ~ ? | 587.44 mT / 5874 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 assembly - report
The following data constitute the direct effect of a engineering analysis. Results are based on models for the material Nd2Fe14B. Real-world parameters might slightly differ. Please consider these data as a reference point for designers.
Table 1: Static force (pull vs distance) - power drop
MW 10x15 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
5870 Gs
587.0 mT
|
2.60 kg / 5.73 pounds
2600.0 g / 25.5 N
|
warning |
| 1 mm |
4702 Gs
470.2 mT
|
1.67 kg / 3.68 pounds
1668.3 g / 16.4 N
|
safe |
| 2 mm |
3645 Gs
364.5 mT
|
1.00 kg / 2.21 pounds
1002.8 g / 9.8 N
|
safe |
| 3 mm |
2784 Gs
278.4 mT
|
0.58 kg / 1.29 pounds
584.8 g / 5.7 N
|
safe |
| 5 mm |
1631 Gs
163.1 mT
|
0.20 kg / 0.44 pounds
200.7 g / 2.0 N
|
safe |
| 10 mm |
534 Gs
53.4 mT
|
0.02 kg / 0.05 pounds
21.5 g / 0.2 N
|
safe |
| 15 mm |
234 Gs
23.4 mT
|
0.00 kg / 0.01 pounds
4.1 g / 0.0 N
|
safe |
| 20 mm |
123 Gs
12.3 mT
|
0.00 kg / 0.00 pounds
1.1 g / 0.0 N
|
safe |
| 30 mm |
46 Gs
4.6 mT
|
0.00 kg / 0.00 pounds
0.2 g / 0.0 N
|
safe |
| 50 mm |
13 Gs
1.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Shear hold (wall)
MW 10x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.52 kg / 1.15 pounds
520.0 g / 5.1 N
|
| 1 mm | Stal (~0.2) |
0.33 kg / 0.74 pounds
334.0 g / 3.3 N
|
| 2 mm | Stal (~0.2) |
0.20 kg / 0.44 pounds
200.0 g / 2.0 N
|
| 3 mm | Stal (~0.2) |
0.12 kg / 0.26 pounds
116.0 g / 1.1 N
|
| 5 mm | Stal (~0.2) |
0.04 kg / 0.09 pounds
40.0 g / 0.4 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) - vertical pull
MW 10x15 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.78 kg / 1.72 pounds
780.0 g / 7.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.52 kg / 1.15 pounds
520.0 g / 5.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.26 kg / 0.57 pounds
260.0 g / 2.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
1.30 kg / 2.87 pounds
1300.0 g / 12.8 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 10x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.26 kg / 0.57 pounds
260.0 g / 2.6 N
|
| 1 mm |
|
0.65 kg / 1.43 pounds
650.0 g / 6.4 N
|
| 2 mm |
|
1.30 kg / 2.87 pounds
1300.0 g / 12.8 N
|
| 3 mm |
|
1.95 kg / 4.30 pounds
1950.0 g / 19.1 N
|
| 5 mm |
|
2.60 kg / 5.73 pounds
2600.0 g / 25.5 N
|
| 10 mm |
|
2.60 kg / 5.73 pounds
2600.0 g / 25.5 N
|
| 11 mm |
|
2.60 kg / 5.73 pounds
2600.0 g / 25.5 N
|
| 12 mm |
|
2.60 kg / 5.73 pounds
2600.0 g / 25.5 N
|
Table 5: Thermal stability (material behavior) - power drop
MW 10x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
2.60 kg / 5.73 pounds
2600.0 g / 25.5 N
|
OK |
| 40 °C | -2.2% |
2.54 kg / 5.61 pounds
2542.8 g / 24.9 N
|
OK |
| 60 °C | -4.4% |
2.49 kg / 5.48 pounds
2485.6 g / 24.4 N
|
OK |
| 80 °C | -6.6% |
2.43 kg / 5.35 pounds
2428.4 g / 23.8 N
|
|
| 100 °C | -28.8% |
1.85 kg / 4.08 pounds
1851.2 g / 18.2 N
|
Table 6: Magnet-Magnet interaction (attraction) - field range
MW 10x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
16.68 kg / 36.78 pounds
6 103 Gs
|
2.50 kg / 5.52 pounds
2502 g / 24.5 N
|
N/A |
| 1 mm |
13.52 kg / 29.80 pounds
10 567 Gs
|
2.03 kg / 4.47 pounds
2028 g / 19.9 N
|
12.17 kg / 26.82 pounds
~0 Gs
|
| 2 mm |
10.70 kg / 23.60 pounds
9 404 Gs
|
1.61 kg / 3.54 pounds
1606 g / 15.8 N
|
9.63 kg / 21.24 pounds
~0 Gs
|
| 3 mm |
8.35 kg / 18.40 pounds
8 304 Gs
|
1.25 kg / 2.76 pounds
1252 g / 12.3 N
|
7.51 kg / 16.56 pounds
~0 Gs
|
| 5 mm |
4.92 kg / 10.85 pounds
6 377 Gs
|
0.74 kg / 1.63 pounds
738 g / 7.2 N
|
4.43 kg / 9.77 pounds
~0 Gs
|
| 10 mm |
1.29 kg / 2.84 pounds
3 262 Gs
|
0.19 kg / 0.43 pounds
193 g / 1.9 N
|
1.16 kg / 2.56 pounds
~0 Gs
|
| 20 mm |
0.14 kg / 0.30 pounds
1 068 Gs
|
0.02 kg / 0.05 pounds
21 g / 0.2 N
|
0.12 kg / 0.27 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.01 pounds
145 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
93 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
63 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
45 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
33 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
25 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 10x15 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 5.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 4.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 3.5 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: Impact energy (kinetic energy) - warning
MW 10x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
17.39 km/h
(4.83 m/s)
|
0.10 J | |
| 30 mm |
29.96 km/h
(8.32 m/s)
|
0.31 J | |
| 50 mm |
38.67 km/h
(10.74 m/s)
|
0.51 J | |
| 100 mm |
54.69 km/h
(15.19 m/s)
|
1.02 J |
Table 9: Anti-corrosion coating durability
MW 10x15 / 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 10x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 4 950 Mx | 49.5 µWb |
| Pc Coefficient | 1.09 | High (Stable) |
Table 11: Physics of underwater searching
MW 10x15 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 2.60 kg | Standard |
| Water (riverbed) |
2.98 kg
(+0.38 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.
2. Steel thickness impact
*Thin metal sheet (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Power loss vs temp
*For N38 grade, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.09
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.
Chemical composition
| 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 proposals
Pros and cons of neodymium magnets.
Strengths
- They retain full power for around ten years – the loss is just ~1% (in theory),
- They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
- In other words, due to the reflective finish of nickel, the element gains a professional look,
- The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Due to the ability of precise forming and customization to specialized needs, neodymium magnets can be produced in a wide range of geometric configurations, which makes them more universal,
- Huge importance in modern technologies – they find application in mass storage devices, electric motors, advanced medical instruments, as well as multitasking production systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and 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 recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- We recommend casing - magnetic mount, due to difficulties in creating threads inside the magnet and complex forms.
- Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these magnets can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Maximum lifting capacity of the magnet – what it depends on?
- using a base made of high-permeability steel, functioning as a magnetic yoke
- with a cross-section no less than 10 mm
- with an ground touching surface
- with direct contact (without coatings)
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Impact of factors on magnetic holding capacity in practice
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
- Base massiveness – too thin sheet does not accept the full field, causing part of the flux to be escaped into the air.
- Steel type – mild steel gives the best results. Higher carbon content lower magnetic properties and lifting capacity.
- Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.
Holding force was checked 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. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.
Warnings
Do not underestimate power
Use magnets with awareness. Their huge power can shock even experienced users. Plan your moves and do not underestimate their force.
Cards and drives
Powerful magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.
Do not overheat magnets
Regular neodymium magnets (grade N) lose magnetization when the temperature goes above 80°C. Damage is permanent.
Impact on smartphones
GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Finger safety
Large magnets can break fingers in a fraction of a second. Do not place your hand betwixt two attracting surfaces.
Allergy Warning
A percentage of the population experience a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Frequent touching might lead to an allergic reaction. We strongly advise wear protective gloves.
Danger to the youngest
Product intended for adults. Small elements pose a choking risk, leading to serious injuries. Store out of reach of kids and pets.
Pacemakers
For implant holders: Powerful magnets affect electronics. Keep at least 30 cm distance or ask another person to work with the magnets.
Magnets are brittle
Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
Flammability
Powder produced during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
