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 |
Technical simulation of the assembly - report
These data are the result of a engineering analysis. Values rely on algorithms for the class Nd2Fe14B. Real-world performance may differ. Please consider these data as a reference point when designing systems.
Table 1: Static pull force (pull vs distance) - 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 LBS
480.0 g / 4.7 N
|
weak grip |
| 1 mm |
3823 Gs
382.3 mT
|
0.19 kg / 0.42 LBS
189.1 g / 1.9 N
|
weak grip |
| 2 mm |
2261 Gs
226.1 mT
|
0.07 kg / 0.15 LBS
66.1 g / 0.6 N
|
weak grip |
| 3 mm |
1378 Gs
137.8 mT
|
0.02 kg / 0.05 LBS
24.6 g / 0.2 N
|
weak grip |
| 5 mm |
607 Gs
60.7 mT
|
0.00 kg / 0.01 LBS
4.8 g / 0.0 N
|
weak grip |
| 10 mm |
154 Gs
15.4 mT
|
0.00 kg / 0.00 LBS
0.3 g / 0.0 N
|
weak grip |
| 15 mm |
63 Gs
6.3 mT
|
0.00 kg / 0.00 LBS
0.1 g / 0.0 N
|
weak grip |
| 20 mm |
32 Gs
3.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
| 30 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding capacity (wall)
MW 5x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.10 kg / 0.21 LBS
96.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.04 kg / 0.08 LBS
38.0 g / 0.4 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
14.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.01 LBS
4.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 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: Vertical assembly (shearing) - behavior on slippery surfaces
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 LBS
144.0 g / 1.4 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.10 kg / 0.21 LBS
96.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.05 kg / 0.11 LBS
48.0 g / 0.5 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.24 kg / 0.53 LBS
240.0 g / 2.4 N
|
Table 4: Material efficiency (saturation) - 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 LBS
48.0 g / 0.5 N
|
| 1 mm |
|
0.12 kg / 0.26 LBS
120.0 g / 1.2 N
|
| 2 mm |
|
0.24 kg / 0.53 LBS
240.0 g / 2.4 N
|
| 3 mm |
|
0.36 kg / 0.79 LBS
360.0 g / 3.5 N
|
| 5 mm |
|
0.48 kg / 1.06 LBS
480.0 g / 4.7 N
|
| 10 mm |
|
0.48 kg / 1.06 LBS
480.0 g / 4.7 N
|
| 11 mm |
|
0.48 kg / 1.06 LBS
480.0 g / 4.7 N
|
| 12 mm |
|
0.48 kg / 1.06 LBS
480.0 g / 4.7 N
|
Table 5: Working in heat (material behavior) - 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 LBS
480.0 g / 4.7 N
|
OK |
| 40 °C | -2.2% |
0.47 kg / 1.03 LBS
469.4 g / 4.6 N
|
OK |
| 60 °C | -4.4% |
0.46 kg / 1.01 LBS
458.9 g / 4.5 N
|
OK |
| 80 °C | -6.6% |
0.45 kg / 0.99 LBS
448.3 g / 4.4 N
|
|
| 100 °C | -28.8% |
0.34 kg / 0.75 LBS
341.8 g / 3.4 N
|
Table 6: Two magnets (repulsion) - field collision
MW 5x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.49 kg / 9.90 LBS
6 154 Gs
|
0.67 kg / 1.49 LBS
674 g / 6.6 N
|
N/A |
| 1 mm |
2.91 kg / 6.42 LBS
9 810 Gs
|
0.44 kg / 0.96 LBS
437 g / 4.3 N
|
2.62 kg / 5.78 LBS
~0 Gs
|
| 2 mm |
1.77 kg / 3.90 LBS
7 646 Gs
|
0.27 kg / 0.59 LBS
265 g / 2.6 N
|
1.59 kg / 3.51 LBS
~0 Gs
|
| 3 mm |
1.05 kg / 2.31 LBS
5 880 Gs
|
0.16 kg / 0.35 LBS
157 g / 1.5 N
|
0.94 kg / 2.08 LBS
~0 Gs
|
| 5 mm |
0.37 kg / 0.82 LBS
3 507 Gs
|
0.06 kg / 0.12 LBS
56 g / 0.5 N
|
0.34 kg / 0.74 LBS
~0 Gs
|
| 10 mm |
0.04 kg / 0.10 LBS
1 213 Gs
|
0.01 kg / 0.01 LBS
7 g / 0.1 N
|
0.04 kg / 0.09 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.01 LBS
309 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
37 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
24 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
16 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
11 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
8 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
6 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Hazards (implants) - 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: Impact energy (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: Coating parameters (durability)
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: Construction 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: Underwater work (magnet fishing)
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. Shear force
*Note: On a vertical wall, the magnet retains merely ~20% of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) severely weakens the holding force.
3. Heat tolerance
*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
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% |
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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Strengths as well as weaknesses of neodymium magnets.
Strengths
- They retain attractive force for almost ten years – the loss is just ~1% (according to analyses),
- They are noted for resistance to demagnetization induced by external disturbances,
- A magnet with a smooth silver surface has an effective appearance,
- Neodymium magnets achieve maximum magnetic induction on a contact point, 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...
- Thanks to freedom in constructing and the capacity to customize to client solutions,
- Versatile presence in innovative solutions – they are commonly used in data components, brushless drives, advanced medical instruments, and other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- At strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 nuts and complicated forms in magnets, we propose using casing - magnetic holder.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these products are able to disrupt the diagnostic process medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a sheet made of low-carbon steel, acting as a ideal flux conductor
- possessing a massiveness of at least 10 mm to avoid saturation
- with an ground contact surface
- without the slightest clearance between the magnet and steel
- during pulling in a direction vertical to the mounting surface
- at ambient temperature approx. 20 degrees Celsius
Determinants of lifting force in real conditions
- Clearance – existence of any layer (paint, tape, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of nominal force).
- Plate thickness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be wasted into the air.
- Steel type – low-carbon steel attracts best. Alloy admixtures reduce magnetic properties and holding force.
- Surface finish – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was measured by applying a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.
Precautions when working with neodymium magnets
Machining danger
Machining of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
ICD Warning
Patients with a ICD should keep an safe separation from magnets. The magnetism can stop the functioning of the implant.
Magnetic media
Avoid bringing magnets close to a purse, laptop, or TV. The magnetic field can permanently damage these devices and wipe information from cards.
Caution required
Handle with care. Neodymium magnets act from a distance and connect with huge force, often faster than you can move away.
Swallowing risk
Always keep magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are life-threatening.
Eye protection
Protect your eyes. Magnets can explode upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.
Finger safety
Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Metal Allergy
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, immediately stop working with magnets and use protective gear.
Demagnetization risk
Avoid heat. NdFeB magnets are susceptible to heat. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
Precision electronics
GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can permanently damage the sensors in your phone.
