MW 38x15 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010061
GTIN/EAN: 5906301810605
Diameter Ø
38 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
127.59 g
Magnetization Direction
↑ axial
Load capacity
40.08 kg / 393.18 N
Magnetic Induction
384.07 mT / 3841 Gs
Coating
[NiCuNi] Nickel
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Technical details - MW 38x15 / N38 - cylindrical magnet
Specification / characteristics - MW 38x15 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010061 |
| GTIN/EAN | 5906301810605 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 38 mm [±0,1 mm] |
| Height | 15 mm [±0,1 mm] |
| Weight | 127.59 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 40.08 kg / 393.18 N |
| Magnetic Induction ~ ? | 384.07 mT / 3841 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 simulation of the assembly - technical parameters
These information constitute the direct effect of a mathematical simulation. Results rely on algorithms for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Use these calculations as a supplementary guide for designers.
Table 1: Static force (pull vs gap) - interaction chart
MW 38x15 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3840 Gs
384.0 mT
|
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
dangerous! |
| 1 mm |
3668 Gs
366.8 mT
|
36.56 kg / 80.61 LBS
36563.4 g / 358.7 N
|
dangerous! |
| 2 mm |
3485 Gs
348.5 mT
|
33.01 kg / 72.78 LBS
33011.6 g / 323.8 N
|
dangerous! |
| 3 mm |
3297 Gs
329.7 mT
|
29.55 kg / 65.14 LBS
29545.5 g / 289.8 N
|
dangerous! |
| 5 mm |
2917 Gs
291.7 mT
|
23.13 kg / 50.99 LBS
23128.9 g / 226.9 N
|
dangerous! |
| 10 mm |
2049 Gs
204.9 mT
|
11.41 kg / 25.15 LBS
11406.3 g / 111.9 N
|
dangerous! |
| 15 mm |
1396 Gs
139.6 mT
|
5.30 kg / 11.68 LBS
5297.4 g / 52.0 N
|
warning |
| 20 mm |
954 Gs
95.4 mT
|
2.47 kg / 5.45 LBS
2473.1 g / 24.3 N
|
warning |
| 30 mm |
474 Gs
47.4 mT
|
0.61 kg / 1.35 LBS
610.3 g / 6.0 N
|
safe |
| 50 mm |
155 Gs
15.5 mT
|
0.07 kg / 0.14 LBS
65.6 g / 0.6 N
|
safe |
Table 2: Shear load (wall)
MW 38x15 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
8.02 kg / 17.67 LBS
8016.0 g / 78.6 N
|
| 1 mm | Stal (~0.2) |
7.31 kg / 16.12 LBS
7312.0 g / 71.7 N
|
| 2 mm | Stal (~0.2) |
6.60 kg / 14.55 LBS
6602.0 g / 64.8 N
|
| 3 mm | Stal (~0.2) |
5.91 kg / 13.03 LBS
5910.0 g / 58.0 N
|
| 5 mm | Stal (~0.2) |
4.63 kg / 10.20 LBS
4626.0 g / 45.4 N
|
| 10 mm | Stal (~0.2) |
2.28 kg / 5.03 LBS
2282.0 g / 22.4 N
|
| 15 mm | Stal (~0.2) |
1.06 kg / 2.34 LBS
1060.0 g / 10.4 N
|
| 20 mm | Stal (~0.2) |
0.49 kg / 1.09 LBS
494.0 g / 4.8 N
|
| 30 mm | Stal (~0.2) |
0.12 kg / 0.27 LBS
122.0 g / 1.2 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.03 LBS
14.0 g / 0.1 N
|
Table 3: Vertical assembly (sliding) - vertical pull
MW 38x15 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
12.02 kg / 26.51 LBS
12024.0 g / 118.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
8.02 kg / 17.67 LBS
8016.0 g / 78.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
4.01 kg / 8.84 LBS
4008.0 g / 39.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
20.04 kg / 44.18 LBS
20040.0 g / 196.6 N
|
Table 4: Material efficiency (saturation) - power losses
MW 38x15 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
2.00 kg / 4.42 LBS
2004.0 g / 19.7 N
|
| 1 mm |
|
5.01 kg / 11.05 LBS
5010.0 g / 49.1 N
|
| 2 mm |
|
10.02 kg / 22.09 LBS
10020.0 g / 98.3 N
|
| 3 mm |
|
15.03 kg / 33.14 LBS
15030.0 g / 147.4 N
|
| 5 mm |
|
25.05 kg / 55.23 LBS
25050.0 g / 245.7 N
|
| 10 mm |
|
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
| 11 mm |
|
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
| 12 mm |
|
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
Table 5: Thermal stability (stability) - power drop
MW 38x15 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
40.08 kg / 88.36 LBS
40080.0 g / 393.2 N
|
OK |
| 40 °C | -2.2% |
39.20 kg / 86.42 LBS
39198.2 g / 384.5 N
|
OK |
| 60 °C | -4.4% |
38.32 kg / 84.47 LBS
38316.5 g / 375.9 N
|
|
| 80 °C | -6.6% |
37.43 kg / 82.53 LBS
37434.7 g / 367.2 N
|
|
| 100 °C | -28.8% |
28.54 kg / 62.91 LBS
28537.0 g / 279.9 N
|
Table 6: Two magnets (repulsion) - field range
MW 38x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
103.10 kg / 227.31 LBS
5 235 Gs
|
15.47 kg / 34.10 LBS
15466 g / 151.7 N
|
N/A |
| 1 mm |
98.64 kg / 217.47 LBS
7 512 Gs
|
14.80 kg / 32.62 LBS
14796 g / 145.2 N
|
88.78 kg / 195.72 LBS
~0 Gs
|
| 2 mm |
94.06 kg / 207.36 LBS
7 336 Gs
|
14.11 kg / 31.10 LBS
14109 g / 138.4 N
|
84.65 kg / 186.63 LBS
~0 Gs
|
| 3 mm |
89.48 kg / 197.26 LBS
7 155 Gs
|
13.42 kg / 29.59 LBS
13421 g / 131.7 N
|
80.53 kg / 177.53 LBS
~0 Gs
|
| 5 mm |
80.42 kg / 177.30 LBS
6 783 Gs
|
12.06 kg / 26.60 LBS
12064 g / 118.3 N
|
72.38 kg / 159.57 LBS
~0 Gs
|
| 10 mm |
59.50 kg / 131.17 LBS
5 834 Gs
|
8.92 kg / 19.68 LBS
8925 g / 87.6 N
|
53.55 kg / 118.05 LBS
~0 Gs
|
| 20 mm |
29.34 kg / 64.69 LBS
4 097 Gs
|
4.40 kg / 9.70 LBS
4401 g / 43.2 N
|
26.41 kg / 58.22 LBS
~0 Gs
|
| 50 mm |
3.08 kg / 6.80 LBS
1 328 Gs
|
0.46 kg / 1.02 LBS
463 g / 4.5 N
|
2.78 kg / 6.12 LBS
~0 Gs
|
| 60 mm |
1.57 kg / 3.46 LBS
948 Gs
|
0.24 kg / 0.52 LBS
236 g / 2.3 N
|
1.41 kg / 3.12 LBS
~0 Gs
|
| 70 mm |
0.84 kg / 1.85 LBS
694 Gs
|
0.13 kg / 0.28 LBS
126 g / 1.2 N
|
0.76 kg / 1.67 LBS
~0 Gs
|
| 80 mm |
0.47 kg / 1.04 LBS
520 Gs
|
0.07 kg / 0.16 LBS
71 g / 0.7 N
|
0.42 kg / 0.94 LBS
~0 Gs
|
| 90 mm |
0.28 kg / 0.61 LBS
398 Gs
|
0.04 kg / 0.09 LBS
42 g / 0.4 N
|
0.25 kg / 0.55 LBS
~0 Gs
|
| 100 mm |
0.17 kg / 0.37 LBS
311 Gs
|
0.03 kg / 0.06 LBS
25 g / 0.2 N
|
0.15 kg / 0.33 LBS
~0 Gs
|
Table 7: Hazards (electronics) - precautionary measures
MW 38x15 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 18.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 14.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 11.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 9.0 cm |
| Remote | 50 Gs (5.0 mT) | 8.0 cm |
| Payment card | 400 Gs (40.0 mT) | 3.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Collisions (kinetic energy) - collision effects
MW 38x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
20.81 km/h
(5.78 m/s)
|
2.13 J | |
| 30 mm |
31.25 km/h
(8.68 m/s)
|
4.81 J | |
| 50 mm |
40.01 km/h
(11.11 m/s)
|
7.88 J | |
| 100 mm |
56.53 km/h
(15.70 m/s)
|
15.73 J |
Table 9: Anti-corrosion coating durability
MW 38x15 / 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 38x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 45 065 Mx | 450.7 µWb |
| Pc Coefficient | 0.50 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 38x15 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 40.08 kg | Standard |
| Water (riverbed) |
45.89 kg
(+5.81 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical surface, the magnet holds merely approx. 20-30% of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) significantly 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) = 0.50
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.
Elemental analysis
| 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Pros and cons of Nd2Fe14B magnets.
Advantages
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
- They possess excellent resistance to weakening of magnetic properties due to external magnetic sources,
- By applying a reflective layer of nickel, the element presents an professional look,
- They feature high magnetic induction at the operating surface, which affects their 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 shaping and the capacity to customize to complex applications,
- Versatile presence in high-tech industry – they serve a role in magnetic memories, electric drive systems, precision medical tools, as well as complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in miniature devices
Cons
- To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in realizing nuts and complicated shapes in magnets, we propose using cover - magnetic mechanism.
- Potential hazard resulting from small fragments 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 elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Lifting parameters
Maximum lifting capacity of the magnet – what it depends on?
- with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
- whose thickness is min. 10 mm
- with an ideally smooth contact surface
- under conditions of gap-free contact (metal-to-metal)
- under perpendicular application of breakaway force (90-degree angle)
- in neutral thermal conditions
Magnet lifting force in use – key factors
- Distance – the presence of any layer (paint, dirt, air) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
- Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic properties and holding force.
- Plate texture – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
- Operating temperature – 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 assessed with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Skin irritation risks
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, cease working with magnets and wear gloves.
Do not give to children
Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Store out of reach of children and animals.
Shattering risk
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets leads to them cracking into small pieces.
Crushing risk
Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!
Dust is flammable
Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.
Data carriers
Powerful magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.
ICD Warning
Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.
Immense force
Use magnets with awareness. Their powerful strength can surprise even experienced users. Be vigilant and do not underestimate their power.
GPS Danger
A strong magnetic field disrupts the functioning of magnetometers in phones and navigation systems. Do not bring magnets close to a smartphone to prevent damaging the sensors.
Demagnetization risk
Keep cool. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).
