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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Product card - 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 |
Physical modeling of the assembly - technical parameters
Presented values constitute the result of a physical calculation. Results rely on models for the material Nd2Fe14B. Operational parameters might slightly differ. Use these calculations as a supplementary guide when designing systems.
Table 1: Static pull force (pull vs distance) - 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 pounds
7700.0 g / 75.5 N
|
strong |
| 1 mm |
4303 Gs
430.3 mT
|
5.81 kg / 12.81 pounds
5810.9 g / 57.0 N
|
strong |
| 2 mm |
3660 Gs
366.0 mT
|
4.20 kg / 9.27 pounds
4203.8 g / 41.2 N
|
strong |
| 3 mm |
3068 Gs
306.8 mT
|
2.95 kg / 6.51 pounds
2953.2 g / 29.0 N
|
strong |
| 5 mm |
2106 Gs
210.6 mT
|
1.39 kg / 3.07 pounds
1392.2 g / 13.7 N
|
low risk |
| 10 mm |
845 Gs
84.5 mT
|
0.22 kg / 0.49 pounds
224.2 g / 2.2 N
|
low risk |
| 15 mm |
393 Gs
39.3 mT
|
0.05 kg / 0.11 pounds
48.5 g / 0.5 N
|
low risk |
| 20 mm |
210 Gs
21.0 mT
|
0.01 kg / 0.03 pounds
13.8 g / 0.1 N
|
low risk |
| 30 mm |
79 Gs
7.9 mT
|
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
low risk |
| 50 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
Table 2: Vertical hold (wall)
MW 15x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.54 kg / 3.40 pounds
1540.0 g / 15.1 N
|
| 1 mm | Stal (~0.2) |
1.16 kg / 2.56 pounds
1162.0 g / 11.4 N
|
| 2 mm | Stal (~0.2) |
0.84 kg / 1.85 pounds
840.0 g / 8.2 N
|
| 3 mm | Stal (~0.2) |
0.59 kg / 1.30 pounds
590.0 g / 5.8 N
|
| 5 mm | Stal (~0.2) |
0.28 kg / 0.61 pounds
278.0 g / 2.7 N
|
| 10 mm | Stal (~0.2) |
0.04 kg / 0.10 pounds
44.0 g / 0.4 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
10.0 g / 0.1 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 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: Wall mounting (shearing) - behavior on slippery surfaces
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 pounds
2310.0 g / 22.7 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.54 kg / 3.40 pounds
1540.0 g / 15.1 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.77 kg / 1.70 pounds
770.0 g / 7.6 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
3.85 kg / 8.49 pounds
3850.0 g / 37.8 N
|
Table 4: Steel thickness (saturation) - power losses
MW 15x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.77 kg / 1.70 pounds
770.0 g / 7.6 N
|
| 1 mm |
|
1.93 kg / 4.24 pounds
1925.0 g / 18.9 N
|
| 2 mm |
|
3.85 kg / 8.49 pounds
3850.0 g / 37.8 N
|
| 3 mm |
|
5.78 kg / 12.73 pounds
5775.0 g / 56.7 N
|
| 5 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 10 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 11 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
| 12 mm |
|
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
Table 5: Thermal resistance (stability) - thermal limit
MW 15x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
7.70 kg / 16.98 pounds
7700.0 g / 75.5 N
|
OK |
| 40 °C | -2.2% |
7.53 kg / 16.60 pounds
7530.6 g / 73.9 N
|
OK |
| 60 °C | -4.4% |
7.36 kg / 16.23 pounds
7361.2 g / 72.2 N
|
OK |
| 80 °C | -6.6% |
7.19 kg / 15.86 pounds
7191.8 g / 70.6 N
|
|
| 100 °C | -28.8% |
5.48 kg / 12.09 pounds
5482.4 g / 53.8 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 15x10 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
26.73 kg / 58.93 pounds
5 797 Gs
|
4.01 kg / 8.84 pounds
4010 g / 39.3 N
|
N/A |
| 1 mm |
23.38 kg / 51.55 pounds
9 265 Gs
|
3.51 kg / 7.73 pounds
3507 g / 34.4 N
|
21.04 kg / 46.39 pounds
~0 Gs
|
| 2 mm |
20.17 kg / 44.48 pounds
8 606 Gs
|
3.03 kg / 6.67 pounds
3026 g / 29.7 N
|
18.16 kg / 40.03 pounds
~0 Gs
|
| 3 mm |
17.23 kg / 37.99 pounds
7 955 Gs
|
2.59 kg / 5.70 pounds
2585 g / 25.4 N
|
15.51 kg / 34.19 pounds
~0 Gs
|
| 5 mm |
12.27 kg / 27.05 pounds
6 712 Gs
|
1.84 kg / 4.06 pounds
1840 g / 18.1 N
|
11.04 kg / 24.34 pounds
~0 Gs
|
| 10 mm |
4.83 kg / 10.66 pounds
4 213 Gs
|
0.73 kg / 1.60 pounds
725 g / 7.1 N
|
4.35 kg / 9.59 pounds
~0 Gs
|
| 20 mm |
0.78 kg / 1.72 pounds
1 690 Gs
|
0.12 kg / 0.26 pounds
117 g / 1.1 N
|
0.70 kg / 1.54 pounds
~0 Gs
|
| 50 mm |
0.02 kg / 0.04 pounds
248 Gs
|
0.00 kg / 0.01 pounds
3 g / 0.0 N
|
0.02 kg / 0.03 pounds
~0 Gs
|
| 60 mm |
0.01 kg / 0.01 pounds
158 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.01 pounds
107 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
75 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
55 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
41 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Hazards (implants) - 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: Impact energy (cracking risk) - 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: Construction 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: Submerged application
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
*Caution: On a vertical wall, the magnet retains just approx. 20-30% of its max power.
2. Steel saturation
*Thin steel (e.g. computer case) significantly limits the holding force.
3. Power loss vs temp
*For standard magnets, the safety 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 |
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Advantages and disadvantages of neodymium magnets.
Advantages
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
- They possess excellent resistance to magnetism drop due to external magnetic sources,
- The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Neodymium magnets create maximum magnetic induction on a small area, which ensures high operational effectiveness,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Thanks to versatility in shaping and the capacity to modify to unusual requirements,
- Key role in high-tech industry – they are used in HDD drives, drive modules, medical equipment, and modern systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 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, when using outdoors
- We suggest a housing - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can complicate diagnosis medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Highest magnetic holding force – what affects it?
- with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
- possessing a thickness of minimum 10 mm to ensure full flux closure
- characterized by even structure
- with total lack of distance (no coatings)
- for force applied at a right angle (in the magnet axis)
- at standard ambient temperature
Magnet lifting force in use – key factors
- Space between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Angle of force application – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Steel grade – the best choice is high-permeability steel. Stainless steels may attract less.
- Surface quality – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
- Thermal conditions – 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 assessed using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with NdFeB magnets
ICD Warning
People with a pacemaker should maintain an safe separation from magnets. The magnetism can stop the functioning of the implant.
Electronic devices
Avoid bringing magnets close to a wallet, computer, or screen. The magnetism can destroy these devices and erase data from cards.
Danger to the youngest
Always store magnets away from children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are tragic.
Hand protection
Mind your fingers. Two large magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Impact on smartphones
A powerful magnetic field negatively affects the functioning of magnetometers in phones and navigation systems. Maintain magnets near a smartphone to avoid damaging the sensors.
Skin irritation risks
Nickel alert: The nickel-copper-nickel coating contains nickel. If redness appears, cease working with magnets and use protective gear.
Do not underestimate power
Use magnets consciously. Their huge power can shock even experienced users. Be vigilant and do not underestimate their power.
Eye protection
NdFeB magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets leads to them shattering into small pieces.
Do not overheat magnets
Standard neodymium magnets (N-type) lose power when the temperature surpasses 80°C. This process is irreversible.
Combustion hazard
Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this may cause fire.
