MW 15x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010027
GTIN/EAN: 5906301810261
Diameter Ø
15 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
13.25 g
Magnetization Direction
↑ axial
Load capacity
7.70 kg / 75.55 N
Magnetic Induction
495.60 mT / 4956 Gs
Coating
[NiCuNi] Nickel
4.51 ZŁ with VAT / pcs + price for transport
3.67 ZŁ net + 23% VAT / pcs
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Technical - MW 15x10 / N38 - cylindrical magnet
Specification / characteristics - MW 15x10 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010027 |
| GTIN/EAN | 5906301810261 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 15 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 13.25 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 7.70 kg / 75.55 N |
| Magnetic Induction ~ ? | 495.60 mT / 4956 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 simulation of the product - report
Presented information are the direct effect of a engineering calculation. Results are based on models for the material Nd2Fe14B. Actual parameters may differ from theoretical values. Use these calculations as a reference point during assembly planning.
Table 1: Static pull force (pull vs gap) - interaction chart
MW 15x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4954 Gs
495.4 mT
|
7.70 kg / 16.98 lbs
7700.0 g / 75.5 N
|
medium risk |
| 1 mm |
4303 Gs
430.3 mT
|
5.81 kg / 12.81 lbs
5810.9 g / 57.0 N
|
medium risk |
| 2 mm |
3660 Gs
366.0 mT
|
4.20 kg / 9.27 lbs
4203.8 g / 41.2 N
|
medium risk |
| 3 mm |
3068 Gs
306.8 mT
|
2.95 kg / 6.51 lbs
2953.2 g / 29.0 N
|
medium risk |
| 5 mm |
2106 Gs
210.6 mT
|
1.39 kg / 3.07 lbs
1392.2 g / 13.7 N
|
weak grip |
| 10 mm |
845 Gs
84.5 mT
|
0.22 kg / 0.49 lbs
224.2 g / 2.2 N
|
weak grip |
| 15 mm |
393 Gs
39.3 mT
|
0.05 kg / 0.11 lbs
48.5 g / 0.5 N
|
weak grip |
| 20 mm |
210 Gs
21.0 mT
|
0.01 kg / 0.03 lbs
13.8 g / 0.1 N
|
weak grip |
| 30 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.00 lbs
2.0 g / 0.0 N
|
weak grip |
| 50 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
weak grip |
Table 2: Sliding load (wall)
MW 15x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.54 kg / 3.40 lbs
1540.0 g / 15.1 N
|
| 1 mm | Stal (~0.2) |
1.16 kg / 2.56 lbs
1162.0 g / 11.4 N
|
| 2 mm | Stal (~0.2) |
0.84 kg / 1.85 lbs
840.0 g / 8.2 N
|
| 3 mm | Stal (~0.2) |
0.59 kg / 1.30 lbs
590.0 g / 5.8 N
|
| 5 mm | Stal (~0.2) |
0.28 kg / 0.61 lbs
278.0 g / 2.7 N
|
| 10 mm | Stal (~0.2) |
0.04 kg / 0.10 lbs
44.0 g / 0.4 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
10.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 lbs
2.0 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 (shearing) - vertical pull
MW 15x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
2.31 kg / 5.09 lbs
2310.0 g / 22.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.54 kg / 3.40 lbs
1540.0 g / 15.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.77 kg / 1.70 lbs
770.0 g / 7.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.85 kg / 8.49 lbs
3850.0 g / 37.8 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 15x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.77 kg / 1.70 lbs
770.0 g / 7.6 N
|
| 1 mm |
|
1.93 kg / 4.24 lbs
1925.0 g / 18.9 N
|
| 2 mm |
|
3.85 kg / 8.49 lbs
3850.0 g / 37.8 N
|
| 3 mm |
|
5.78 kg / 12.73 lbs
5775.0 g / 56.7 N
|
| 5 mm |
|
7.70 kg / 16.98 lbs
7700.0 g / 75.5 N
|
| 10 mm |
|
7.70 kg / 16.98 lbs
7700.0 g / 75.5 N
|
| 11 mm |
|
7.70 kg / 16.98 lbs
7700.0 g / 75.5 N
|
| 12 mm |
|
7.70 kg / 16.98 lbs
7700.0 g / 75.5 N
|
Table 5: Working in heat (material behavior) - power drop
MW 15x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
7.70 kg / 16.98 lbs
7700.0 g / 75.5 N
|
OK |
| 40 °C | -2.2% |
7.53 kg / 16.60 lbs
7530.6 g / 73.9 N
|
OK |
| 60 °C | -4.4% |
7.36 kg / 16.23 lbs
7361.2 g / 72.2 N
|
OK |
| 80 °C | -6.6% |
7.19 kg / 15.86 lbs
7191.8 g / 70.6 N
|
|
| 100 °C | -28.8% |
5.48 kg / 12.09 lbs
5482.4 g / 53.8 N
|
Table 6: Two magnets (repulsion) - field range
MW 15x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
26.73 kg / 58.93 lbs
5 797 Gs
|
4.01 kg / 8.84 lbs
4010 g / 39.3 N
|
N/A |
| 1 mm |
23.38 kg / 51.55 lbs
9 265 Gs
|
3.51 kg / 7.73 lbs
3507 g / 34.4 N
|
21.04 kg / 46.39 lbs
~0 Gs
|
| 2 mm |
20.17 kg / 44.48 lbs
8 606 Gs
|
3.03 kg / 6.67 lbs
3026 g / 29.7 N
|
18.16 kg / 40.03 lbs
~0 Gs
|
| 3 mm |
17.23 kg / 37.99 lbs
7 955 Gs
|
2.59 kg / 5.70 lbs
2585 g / 25.4 N
|
15.51 kg / 34.19 lbs
~0 Gs
|
| 5 mm |
12.27 kg / 27.05 lbs
6 712 Gs
|
1.84 kg / 4.06 lbs
1840 g / 18.1 N
|
11.04 kg / 24.34 lbs
~0 Gs
|
| 10 mm |
4.83 kg / 10.66 lbs
4 213 Gs
|
0.73 kg / 1.60 lbs
725 g / 7.1 N
|
4.35 kg / 9.59 lbs
~0 Gs
|
| 20 mm |
0.78 kg / 1.72 lbs
1 690 Gs
|
0.12 kg / 0.26 lbs
117 g / 1.1 N
|
0.70 kg / 1.54 lbs
~0 Gs
|
| 50 mm |
0.02 kg / 0.04 lbs
248 Gs
|
0.00 kg / 0.01 lbs
3 g / 0.0 N
|
0.02 kg / 0.03 lbs
~0 Gs
|
| 60 mm |
0.01 kg / 0.01 lbs
158 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 lbs
107 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
75 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
55 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
41 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 15x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 8.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 7.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 5.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 4.0 cm |
| Remote | 50 Gs (5.0 mT) | 4.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Dynamics (kinetic energy) - warning
MW 15x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
24.75 km/h
(6.88 m/s)
|
0.31 J | |
| 30 mm |
42.12 km/h
(11.70 m/s)
|
0.91 J | |
| 50 mm |
54.36 km/h
(15.10 m/s)
|
1.51 J | |
| 100 mm |
76.88 km/h
(21.36 m/s)
|
3.02 J |
Table 9: Coating parameters (durability)
MW 15x10 / 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 15x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 8 827 Mx | 88.3 µWb |
| Pc Coefficient | 0.71 | High (Stable) |
Table 11: Underwater work (magnet fishing)
MW 15x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 7.70 kg | Standard |
| Water (riverbed) |
8.82 kg
(+1.12 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Note: On a vertical wall, the magnet holds merely approx. 20-30% of its perpendicular strength.
2. Steel thickness impact
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Temperature resistance
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71
This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. 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 |
Other proposals
Pros and cons of rare earth magnets.
Pros
- They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
- They show high resistance to demagnetization induced by external disturbances,
- In other words, due to the aesthetic layer of silver, the element gains a professional look,
- Neodymium magnets create maximum magnetic induction on a small surface, which ensures high operational effectiveness,
- 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...
- In view of the potential of free shaping and customization to individualized requirements, neodymium magnets can be modeled in a broad palette of geometric configurations, which increases their versatility,
- Versatile presence in electronics industry – they serve a role in HDD drives, brushless drives, precision medical tools, as well as industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in miniature devices
Limitations
- To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its 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
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited possibility of making nuts in the magnet and complicated forms - preferred is cover - magnet mounting.
- Possible danger related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child safety. Additionally, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
- Due to complex production process, their price is relatively high,
Lifting parameters
Detachment force of the magnet in optimal conditions – what affects it?
- with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
- whose transverse dimension reaches at least 10 mm
- with a surface perfectly flat
- with total lack of distance (without impurities)
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Practical aspects of lifting capacity – factors
- Air gap (betwixt the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, rust or dirt).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Plate thickness – insufficiently thick sheet does not close the flux, causing part of the flux to be lost to the other side.
- Steel grade – the best choice is high-permeability steel. Cast iron may have worse magnetic properties.
- Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.
Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.
Safe handling of NdFeB magnets
Adults only
Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets connecting inside the body are fatal.
Warning for heart patients
Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Respect the power
Be careful. Rare earth magnets act from a distance and snap with massive power, often quicker than you can react.
Cards and drives
Avoid bringing magnets close to a wallet, laptop, or screen. The magnetism can destroy these devices and erase data from cards.
Nickel allergy
Certain individuals suffer from a contact allergy to Ni, which is the standard coating for neodymium magnets. Prolonged contact might lead to dermatitis. We suggest use safety gloves.
Material brittleness
NdFeB magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets will cause them shattering into shards.
Demagnetization risk
Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).
Fire warning
Drilling and cutting of NdFeB material poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Crushing force
Big blocks can smash fingers instantly. Never put your hand between two attracting surfaces.
GPS and phone interference
GPS units and smartphones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.
