MW 5x15 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010084
GTIN/EAN: 5906301810834
Diameter Ø
5 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
2.21 g
Magnetization Direction
↑ axial
Load capacity
0.48 kg / 4.68 N
Magnetic Induction
610.03 mT / 6100 Gs
Coating
[NiCuNi] Nickel
1.107 ZŁ with VAT / pcs + price for transport
0.900 ZŁ net + 23% VAT / pcs
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Product card - MW 5x15 / N38 - cylindrical magnet
Specification / characteristics - MW 5x15 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010084 |
| GTIN/EAN | 5906301810834 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 15 mm [±0,1 mm] |
| Weight | 2.21 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.48 kg / 4.68 N |
| Magnetic Induction ~ ? | 610.03 mT / 6100 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
These values represent the direct effect of a mathematical simulation. Results were calculated on algorithms for the material Nd2Fe14B. Real-world conditions might slightly deviate from the simulation results. Treat these data as a supplementary guide when designing systems.
Table 1: Static pull force (force vs gap) - power drop
MW 5x15 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6091 Gs
609.1 mT
|
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
|
safe |
| 1 mm |
3823 Gs
382.3 mT
|
0.19 kg / 0.42 pounds
189.1 g / 1.9 N
|
safe |
| 2 mm |
2261 Gs
226.1 mT
|
0.07 kg / 0.15 pounds
66.1 g / 0.6 N
|
safe |
| 3 mm |
1378 Gs
137.8 mT
|
0.02 kg / 0.05 pounds
24.6 g / 0.2 N
|
safe |
| 5 mm |
607 Gs
60.7 mT
|
0.00 kg / 0.01 pounds
4.8 g / 0.0 N
|
safe |
| 10 mm |
154 Gs
15.4 mT
|
0.00 kg / 0.00 pounds
0.3 g / 0.0 N
|
safe |
| 15 mm |
63 Gs
6.3 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 20 mm |
32 Gs
3.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 30 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Slippage hold (wall)
MW 5x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.10 kg / 0.21 pounds
96.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.04 kg / 0.08 pounds
38.0 g / 0.4 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
14.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 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: Wall mounting (shearing) - vertical pull
MW 5x15 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.14 kg / 0.32 pounds
144.0 g / 1.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.10 kg / 0.21 pounds
96.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.05 kg / 0.11 pounds
48.0 g / 0.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.24 kg / 0.53 pounds
240.0 g / 2.4 N
|
Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 5x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.05 kg / 0.11 pounds
48.0 g / 0.5 N
|
| 1 mm |
|
0.12 kg / 0.26 pounds
120.0 g / 1.2 N
|
| 2 mm |
|
0.24 kg / 0.53 pounds
240.0 g / 2.4 N
|
| 3 mm |
|
0.36 kg / 0.79 pounds
360.0 g / 3.5 N
|
| 5 mm |
|
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
|
| 10 mm |
|
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
|
| 11 mm |
|
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
|
| 12 mm |
|
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
|
Table 5: Working in heat (stability) - resistance threshold
MW 5x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.48 kg / 1.06 pounds
480.0 g / 4.7 N
|
OK |
| 40 °C | -2.2% |
0.47 kg / 1.03 pounds
469.4 g / 4.6 N
|
OK |
| 60 °C | -4.4% |
0.46 kg / 1.01 pounds
458.9 g / 4.5 N
|
OK |
| 80 °C | -6.6% |
0.45 kg / 0.99 pounds
448.3 g / 4.4 N
|
|
| 100 °C | -28.8% |
0.34 kg / 0.75 pounds
341.8 g / 3.4 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 5x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.49 kg / 9.90 pounds
6 154 Gs
|
0.67 kg / 1.49 pounds
674 g / 6.6 N
|
N/A |
| 1 mm |
2.91 kg / 6.42 pounds
9 810 Gs
|
0.44 kg / 0.96 pounds
437 g / 4.3 N
|
2.62 kg / 5.78 pounds
~0 Gs
|
| 2 mm |
1.77 kg / 3.90 pounds
7 646 Gs
|
0.27 kg / 0.59 pounds
265 g / 2.6 N
|
1.59 kg / 3.51 pounds
~0 Gs
|
| 3 mm |
1.05 kg / 2.31 pounds
5 880 Gs
|
0.16 kg / 0.35 pounds
157 g / 1.5 N
|
0.94 kg / 2.08 pounds
~0 Gs
|
| 5 mm |
0.37 kg / 0.82 pounds
3 507 Gs
|
0.06 kg / 0.12 pounds
56 g / 0.5 N
|
0.34 kg / 0.74 pounds
~0 Gs
|
| 10 mm |
0.04 kg / 0.10 pounds
1 213 Gs
|
0.01 kg / 0.01 pounds
7 g / 0.1 N
|
0.04 kg / 0.09 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.01 pounds
309 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
37 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
24 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
16 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
11 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
8 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
6 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (electronics) - precautionary measures
MW 5x15 / 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) | 2.5 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.0 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 (kinetic energy) - warning
MW 5x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
14.87 km/h
(4.13 m/s)
|
0.02 J | |
| 30 mm |
25.74 km/h
(7.15 m/s)
|
0.06 J | |
| 50 mm |
33.23 km/h
(9.23 m/s)
|
0.09 J | |
| 100 mm |
47.00 km/h
(13.06 m/s)
|
0.19 J |
Table 9: Surface protection spec
MW 5x15 / 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 5x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 382 Mx | 13.8 µWb |
| Pc Coefficient | 1.38 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 5x15 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.48 kg | Standard |
| Water (riverbed) |
0.55 kg
(+0.07 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet holds only ~20% of its perpendicular strength.
2. Steel saturation
*Thin steel (e.g. computer case) severely weakens the holding force.
3. Temperature resistance
*For N38 material, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.38
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% |
Ecology and recycling (GPSR)
| 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 rare earth magnets.
Advantages
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- Magnets perfectly protect themselves against demagnetization caused by external fields,
- In other words, due to the shiny layer of silver, the element is aesthetically pleasing,
- They show high magnetic induction at the operating surface, which improves attraction properties,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures reaching 230°C and above...
- Thanks to versatility in constructing and the capacity to modify to specific needs,
- Significant place in electronics industry – they are commonly used in magnetic memories, motor assemblies, precision medical tools, and technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in compact constructions
Weaknesses
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
- Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing threads and complicated forms in magnets, we propose using cover - magnetic mechanism.
- Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical after entering 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?
- using a sheet made of mild steel, serving as a ideal flux conductor
- with a cross-section of at least 10 mm
- with an polished touching surface
- without any air gap between the magnet and steel
- during pulling in a direction perpendicular to the mounting surface
- at standard ambient temperature
Magnet lifting force in use – key factors
- Air gap (betwixt the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
- Load vector – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Metal type – not every steel reacts the same. Alloy additives weaken the attraction effect.
- Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet and the plate lowers the holding force.
H&S for magnets
Magnetic media
Device Safety: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, medical aids, timepieces).
Sensitization to coating
Studies show that the nickel plating (standard magnet coating) is a potent allergen. For allergy sufferers, avoid direct skin contact or select coated magnets.
Keep away from electronics
Be aware: neodymium magnets generate a field that disrupts precision electronics. Maintain a separation from your mobile, device, and GPS.
Thermal limits
Keep cool. NdFeB magnets are sensitive to heat. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Physical harm
Big blocks can break fingers in a fraction of a second. Do not put your hand between two attracting surfaces.
Immense force
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Material brittleness
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting shards into the air. We recommend safety glasses.
Adults only
Absolutely keep magnets away from children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are very dangerous.
Fire risk
Powder created during machining of magnets is self-igniting. Do not drill into magnets unless you are an expert.
Danger to pacemakers
Medical warning: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.
