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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Technical data - 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 |
Physical simulation of the assembly - data
Presented information are the direct effect of a physical calculation. Results are based on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these calculations as a reference point when designing systems.
Table 1: Static pull force (force vs distance) - characteristics
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 lbs
5390.0 g / 52.9 N
|
medium risk |
| 1 mm |
3054 Gs
305.4 mT
|
4.26 kg / 9.39 lbs
4258.2 g / 41.8 N
|
medium risk |
| 2 mm |
2633 Gs
263.3 mT
|
3.17 kg / 6.98 lbs
3165.4 g / 31.1 N
|
medium risk |
| 3 mm |
2221 Gs
222.1 mT
|
2.25 kg / 4.96 lbs
2251.5 g / 22.1 N
|
medium risk |
| 5 mm |
1521 Gs
152.1 mT
|
1.06 kg / 2.33 lbs
1056.2 g / 10.4 N
|
low risk |
| 10 mm |
585 Gs
58.5 mT
|
0.16 kg / 0.35 lbs
156.5 g / 1.5 N
|
low risk |
| 15 mm |
260 Gs
26.0 mT
|
0.03 kg / 0.07 lbs
30.8 g / 0.3 N
|
low risk |
| 20 mm |
133 Gs
13.3 mT
|
0.01 kg / 0.02 lbs
8.1 g / 0.1 N
|
low risk |
| 30 mm |
47 Gs
4.7 mT
|
0.00 kg / 0.00 lbs
1.0 g / 0.0 N
|
low risk |
| 50 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 lbs
0.1 g / 0.0 N
|
low risk |
Table 2: Sliding load (wall)
MW 15x5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.08 kg / 2.38 lbs
1078.0 g / 10.6 N
|
| 1 mm | Stal (~0.2) |
0.85 kg / 1.88 lbs
852.0 g / 8.4 N
|
| 2 mm | Stal (~0.2) |
0.63 kg / 1.40 lbs
634.0 g / 6.2 N
|
| 3 mm | Stal (~0.2) |
0.45 kg / 0.99 lbs
450.0 g / 4.4 N
|
| 5 mm | Stal (~0.2) |
0.21 kg / 0.47 lbs
212.0 g / 2.1 N
|
| 10 mm | Stal (~0.2) |
0.03 kg / 0.07 lbs
32.0 g / 0.3 N
|
| 15 mm | Stal (~0.2) |
0.01 kg / 0.01 lbs
6.0 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: Wall mounting (shearing) - behavior on slippery surfaces
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 lbs
1617.0 g / 15.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.08 kg / 2.38 lbs
1078.0 g / 10.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.54 kg / 1.19 lbs
539.0 g / 5.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.70 kg / 5.94 lbs
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 lbs
539.0 g / 5.3 N
|
| 1 mm |
|
1.35 kg / 2.97 lbs
1347.5 g / 13.2 N
|
| 2 mm |
|
2.70 kg / 5.94 lbs
2695.0 g / 26.4 N
|
| 3 mm |
|
4.04 kg / 8.91 lbs
4042.5 g / 39.7 N
|
| 5 mm |
|
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
|
| 10 mm |
|
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
|
| 11 mm |
|
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
|
| 12 mm |
|
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
|
Table 5: Working in heat (stability) - thermal limit
MW 15x5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
5.39 kg / 11.88 lbs
5390.0 g / 52.9 N
|
OK |
| 40 °C | -2.2% |
5.27 kg / 11.62 lbs
5271.4 g / 51.7 N
|
OK |
| 60 °C | -4.4% |
5.15 kg / 11.36 lbs
5152.8 g / 50.5 N
|
|
| 80 °C | -6.6% |
5.03 kg / 11.10 lbs
5034.3 g / 49.4 N
|
|
| 100 °C | -28.8% |
3.84 kg / 8.46 lbs
3837.7 g / 37.6 N
|
Table 6: Two magnets (attraction) - field range
MW 15x5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
12.86 kg / 28.35 lbs
4 954 Gs
|
1.93 kg / 4.25 lbs
1929 g / 18.9 N
|
N/A |
| 1 mm |
11.54 kg / 25.43 lbs
6 508 Gs
|
1.73 kg / 3.81 lbs
1730 g / 17.0 N
|
10.38 kg / 22.89 lbs
~0 Gs
|
| 2 mm |
10.16 kg / 22.40 lbs
6 107 Gs
|
1.52 kg / 3.36 lbs
1524 g / 14.9 N
|
9.14 kg / 20.16 lbs
~0 Gs
|
| 3 mm |
8.82 kg / 19.44 lbs
5 689 Gs
|
1.32 kg / 2.92 lbs
1322 g / 13.0 N
|
7.93 kg / 17.49 lbs
~0 Gs
|
| 5 mm |
6.40 kg / 14.11 lbs
4 847 Gs
|
0.96 kg / 2.12 lbs
960 g / 9.4 N
|
5.76 kg / 12.70 lbs
~0 Gs
|
| 10 mm |
2.52 kg / 5.56 lbs
3 042 Gs
|
0.38 kg / 0.83 lbs
378 g / 3.7 N
|
2.27 kg / 5.00 lbs
~0 Gs
|
| 20 mm |
0.37 kg / 0.82 lbs
1 171 Gs
|
0.06 kg / 0.12 lbs
56 g / 0.5 N
|
0.34 kg / 0.74 lbs
~0 Gs
|
| 50 mm |
0.01 kg / 0.01 lbs
153 Gs
|
0.00 kg / 0.00 lbs
1 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
| 60 mm |
0.00 kg / 0.01 lbs
95 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
63 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
44 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
32 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
23 Gs
|
0.00 kg / 0.00 lbs
0 g / 0.0 N
|
0.00 kg / 0.00 lbs
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
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: Collisions (kinetic energy) - collision effects
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: Surface protection spec
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: Electrical 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: Underwater work (magnet fishing)
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
*Note: On a vertical wall, the magnet retains just a fraction of its perpendicular strength.
2. Plate thickness effect
*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.
3. Temperature resistance
*For N38 material, the max working temp 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Pros and cons of rare earth magnets.
Benefits
- They retain magnetic properties for around ten years – the drop is just ~1% (in theory),
- Neodymium magnets remain remarkably resistant to magnetic field loss caused by external field sources,
- A magnet with a shiny gold surface looks better,
- Magnetic induction on the working part of the magnet turns out to be impressive,
- Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
- In view of the option of flexible shaping and customization to unique solutions, magnetic components can be manufactured in a variety of geometric configurations, which expands the range of possible applications,
- Versatile presence in high-tech industry – they are utilized in magnetic memories, drive modules, advanced medical instruments, and modern systems.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
Cons
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise 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 immune to moisture, when using outdoors
- We recommend cover - magnetic mount, due to difficulties in creating threads inside the magnet and complicated shapes.
- Health risk resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Highest magnetic holding force – what it depends on?
- using a base made of mild steel, functioning as a ideal flux conductor
- whose thickness reaches at least 10 mm
- with an ground touching surface
- under conditions of ideal adhesion (metal-to-metal)
- for force applied at a right angle (in the magnet axis)
- in neutral thermal conditions
Lifting capacity in real conditions – factors
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Material type – ideal substrate is high-permeability steel. Cast iron may attract less.
- Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity was determined with the use of a steel plate with a smooth surface 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 fivefold. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the holding force.
Warnings
Medical interference
People with a pacemaker should keep an large gap from magnets. The magnetism can interfere with the operation of the implant.
Sensitization to coating
A percentage of the population suffer from a sensitization to Ni, which is the common plating for neodymium magnets. Extended handling might lead to skin redness. We recommend wear safety gloves.
Electronic devices
Do not bring magnets near a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.
Thermal limits
Regular neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.
Handling rules
Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Dust explosion hazard
Powder generated during cutting of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
Fragile material
Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.
Choking Hazard
Only for adults. Tiny parts can be swallowed, leading to serious injuries. Keep away from children and animals.
Compass and GPS
A powerful magnetic field negatively affects the functioning of compasses in phones and navigation systems. Do not bring magnets close to a smartphone to prevent breaking the sensors.
Crushing force
Big blocks can break fingers instantly. Do not put your hand betwixt two attracting surfaces.
