MW 15x5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010031
GTIN/EAN: 5906301810308
Diameter Ø
15 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
6.63 g
Magnetization Direction
↑ axial
Load capacity
5.39 kg / 52.83 N
Magnetic Induction
343.70 mT / 3437 Gs
Coating
[NiCuNi] Nickel
3.20 ZŁ with VAT / pcs + price for transport
2.60 ZŁ net + 23% VAT / pcs
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Detailed specification - MW 15x5 / N38 - cylindrical magnet
Specification / characteristics - MW 15x5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010031 |
| GTIN/EAN | 5906301810308 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 15 mm [±0,1 mm] |
| Height | 5 mm [±0,1 mm] |
| Weight | 6.63 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 5.39 kg / 52.83 N |
| Magnetic Induction ~ ? | 343.70 mT / 3437 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 modeling of the magnet - data
The following values represent the direct effect of a mathematical calculation. Results are based on algorithms for the material Nd2Fe14B. Actual conditions might slightly deviate from the simulation results. Treat these data as a preliminary roadmap during assembly planning.
Table 1: Static force (force vs gap) - power drop
MW 15x5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3436 Gs
343.6 mT
|
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
|
strong |
| 1 mm |
3054 Gs
305.4 mT
|
4.26 kg / 9.39 pounds
4258.2 g / 41.8 N
|
strong |
| 2 mm |
2633 Gs
263.3 mT
|
3.17 kg / 6.98 pounds
3165.4 g / 31.1 N
|
strong |
| 3 mm |
2221 Gs
222.1 mT
|
2.25 kg / 4.96 pounds
2251.5 g / 22.1 N
|
strong |
| 5 mm |
1521 Gs
152.1 mT
|
1.06 kg / 2.33 pounds
1056.2 g / 10.4 N
|
low risk |
| 10 mm |
585 Gs
58.5 mT
|
0.16 kg / 0.35 pounds
156.5 g / 1.5 N
|
low risk |
| 15 mm |
260 Gs
26.0 mT
|
0.03 kg / 0.07 pounds
30.8 g / 0.3 N
|
low risk |
| 20 mm |
133 Gs
13.3 mT
|
0.01 kg / 0.02 pounds
8.1 g / 0.1 N
|
low risk |
| 30 mm |
47 Gs
4.7 mT
|
0.00 kg / 0.00 pounds
1.0 g / 0.0 N
|
low risk |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
Table 2: Shear force (wall)
MW 15x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.08 kg / 2.38 pounds
1078.0 g / 10.6 N
|
| 1 mm | Stal (~0.2) |
0.85 kg / 1.88 pounds
852.0 g / 8.4 N
|
| 2 mm | Stal (~0.2) |
0.63 kg / 1.40 pounds
634.0 g / 6.2 N
|
| 3 mm | Stal (~0.2) |
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
|
| 5 mm | Stal (~0.2) |
0.21 kg / 0.47 pounds
212.0 g / 2.1 N
|
| 10 mm | Stal (~0.2) |
0.03 kg / 0.07 pounds
32.0 g / 0.3 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.01 pounds
6.0 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: Vertical assembly (shearing) - vertical pull
MW 15x5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.62 kg / 3.56 pounds
1617.0 g / 15.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.08 kg / 2.38 pounds
1078.0 g / 10.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.54 kg / 1.19 pounds
539.0 g / 5.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.70 kg / 5.94 pounds
2695.0 g / 26.4 N
|
Table 4: Steel thickness (saturation) - sheet metal selection
MW 15x5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.54 kg / 1.19 pounds
539.0 g / 5.3 N
|
| 1 mm |
|
1.35 kg / 2.97 pounds
1347.5 g / 13.2 N
|
| 2 mm |
|
2.70 kg / 5.94 pounds
2695.0 g / 26.4 N
|
| 3 mm |
|
4.04 kg / 8.91 pounds
4042.5 g / 39.7 N
|
| 5 mm |
|
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
|
| 10 mm |
|
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
|
| 11 mm |
|
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
|
| 12 mm |
|
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 15x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
5.39 kg / 11.88 pounds
5390.0 g / 52.9 N
|
OK |
| 40 °C | -2.2% |
5.27 kg / 11.62 pounds
5271.4 g / 51.7 N
|
OK |
| 60 °C | -4.4% |
5.15 kg / 11.36 pounds
5152.8 g / 50.5 N
|
|
| 80 °C | -6.6% |
5.03 kg / 11.10 pounds
5034.3 g / 49.4 N
|
|
| 100 °C | -28.8% |
3.84 kg / 8.46 pounds
3837.7 g / 37.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 15x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
12.86 kg / 28.35 pounds
4 954 Gs
|
1.93 kg / 4.25 pounds
1929 g / 18.9 N
|
N/A |
| 1 mm |
11.54 kg / 25.43 pounds
6 508 Gs
|
1.73 kg / 3.81 pounds
1730 g / 17.0 N
|
10.38 kg / 22.89 pounds
~0 Gs
|
| 2 mm |
10.16 kg / 22.40 pounds
6 107 Gs
|
1.52 kg / 3.36 pounds
1524 g / 14.9 N
|
9.14 kg / 20.16 pounds
~0 Gs
|
| 3 mm |
8.82 kg / 19.44 pounds
5 689 Gs
|
1.32 kg / 2.92 pounds
1322 g / 13.0 N
|
7.93 kg / 17.49 pounds
~0 Gs
|
| 5 mm |
6.40 kg / 14.11 pounds
4 847 Gs
|
0.96 kg / 2.12 pounds
960 g / 9.4 N
|
5.76 kg / 12.70 pounds
~0 Gs
|
| 10 mm |
2.52 kg / 5.56 pounds
3 042 Gs
|
0.38 kg / 0.83 pounds
378 g / 3.7 N
|
2.27 kg / 5.00 pounds
~0 Gs
|
| 20 mm |
0.37 kg / 0.82 pounds
1 171 Gs
|
0.06 kg / 0.12 pounds
56 g / 0.5 N
|
0.34 kg / 0.74 pounds
~0 Gs
|
| 50 mm |
0.01 kg / 0.01 pounds
153 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 pounds
95 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
44 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
32 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
23 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MW 15x5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 7.0 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 |
| Remote | 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: Dynamics (cracking risk) - warning
MW 15x5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
29.27 km/h
(8.13 m/s)
|
0.22 J | |
| 30 mm |
49.81 km/h
(13.84 m/s)
|
0.63 J | |
| 50 mm |
64.30 km/h
(17.86 m/s)
|
1.06 J | |
| 100 mm |
90.93 km/h
(25.26 m/s)
|
2.12 J |
Table 9: Coating parameters (durability)
MW 15x5 / 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 (Flux)
MW 15x5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 6 428 Mx | 64.3 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Submerged application
MW 15x5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 5.39 kg | Standard |
| Water (riverbed) |
6.17 kg
(+0.78 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet retains just ~20% of its nominal pull.
2. Steel thickness impact
*Thin steel (e.g. computer case) significantly 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) = 0.44
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 |
View also proposals
Advantages as well as disadvantages of Nd2Fe14B magnets.
Advantages
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (according to literature),
- They feature excellent resistance to magnetic field loss when exposed to external fields,
- A magnet with a smooth nickel surface has an effective appearance,
- Neodymium magnets create maximum magnetic induction on a small area, which increases force concentration,
- Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
- Due to the possibility of precise shaping and customization to individualized needs, NdFeB magnets can be manufactured in a variety of forms and dimensions, which amplifies use scope,
- Wide application in modern technologies – they find application in magnetic memories, electric motors, medical devices, as well as multitasking production systems.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Cons
- At strong impacts they can break, therefore we recommend placing them in special holders. 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 strength. 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
- Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing nuts and complex shapes in magnets, we recommend using a housing - magnetic mount.
- Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Holding force characteristics
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a sheet made of high-permeability steel, functioning as a magnetic yoke
- with a thickness minimum 10 mm
- with an ground touching surface
- with total lack of distance (without paint)
- for force applied at a right angle (in the magnet axis)
- in temp. approx. 20°C
Key elements affecting lifting force
- Distance (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, rust or debris).
- Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of nominal force).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Metal type – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
- Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate lowers the lifting capacity.
Safe handling of NdFeB magnets
Precision electronics
Note: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a separation from your phone, device, and GPS.
Machining danger
Mechanical processing of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Power loss in heat
Control the heat. Heating the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.
Physical harm
Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand between two strong magnets.
Allergy Warning
Studies show that nickel (standard magnet coating) is a common allergen. For allergy sufferers, refrain from direct skin contact and choose versions in plastic housing.
Warning for heart patients
Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.
Protect data
Intense magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Handling guide
Exercise caution. Neodymium magnets act from a distance and snap with huge force, often quicker than you can move away.
Risk of cracking
NdFeB magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets will cause them cracking into shards.
No play value
Always keep magnets away from children. Choking hazard is high, and the effects of magnets clamping inside the body are life-threatening.
