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
- Coating
- [NiCuNi] Nickel
How we measure these parameters — certificates and measurements
56.91 zł net / pcs
70.00 zł with VAT (23% VAT) / pcs
bulk discounts:
Need more?Frequently asked questions
What is the maximum working temperature of a disc magnet?
What is the difference between N38, N42 and N52?
What is the dimensional tolerance?
Engineering report for this magnet
Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.
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Technical data of the product - 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 |
|---|---|---|
| Remanence Br ? | 12.2-12.6 | kGs |
| Remanence Br ? | 1220-1260 | mT |
| Coercivity bHc ? | 10.8-11.5 | kOe |
| Coercivity bHc ? | 860-915 | kA/m |
| Intrinsic coercivity iHc | ≥ 12 | kOe |
| Intrinsic coercivity iHc | ≥ 955 | kA/m |
| Energy product BHmax ? | 36-38 | BH max MGOe |
| Energy product BHmax ? | 287-303 | BH max KJ/m |
| Maximum working 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 | 310 | °C |
| Curie Temperature TF | 590 | °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 analysis of the assembly - technical parameters
These information are the direct effect of a physical simulation. Values were calculated on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Please consider these calculations as a reference point when designing systems.
Table 1: Static pull 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
|
crushing |
| 1 mm |
3668 Gs
366.8 mT
|
36.56 kg / 80.61 LBS
36563.4 g / 358.7 N
|
crushing |
| 2 mm |
3485 Gs
348.5 mT
|
33.01 kg / 72.78 LBS
33011.6 g / 323.8 N
|
crushing |
| 3 mm |
3297 Gs
329.7 mT
|
29.55 kg / 65.14 LBS
29545.5 g / 289.8 N
|
crushing |
| 5 mm |
2917 Gs
291.7 mT
|
23.13 kg / 50.99 LBS
23128.9 g / 226.9 N
|
crushing |
| 10 mm |
2049 Gs
204.9 mT
|
11.41 kg / 25.15 LBS
11406.3 g / 111.9 N
|
crushing |
| 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
|
low risk |
| 50 mm |
155 Gs
15.5 mT
|
0.07 kg / 0.14 LBS
65.6 g / 0.6 N
|
low risk |
Table 2: Shear hold (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: Wall mounting (shearing) - behavior on slippery surfaces
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 (substrate influence) - 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 resistance (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: Magnet-Magnet interaction (attraction) - field collision
MW 38x15 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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: Protective zones (implants) - warnings
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 |
| Mechanical watch | 20 Gs (2.0 mT) | 11.5 cm |
| Phone / Smartphone | 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: Dynamics (kinetic energy) - warning
MW 38x15 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
21.90 km/h
(6.08 m/s)
|
2.36 J | |
| 30 mm |
24.94 km/h
(6.93 m/s)
|
3.06 J | |
| 50 mm |
25.12 km/h
(6.98 m/s)
|
3.11 J | |
| 100 mm |
25.15 km/h
(6.99 m/s)
|
3.11 J |
Table 9: Surface protection spec
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 (Flux)
MW 38x15 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 45 065 Mx | 450.7 µWb |
| Pc Coefficient | 0.50 | Low (Flat) |
Table 11: Submerged application
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. Shear force
*Warning: On a vertical wall, the magnet retains just a fraction of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. computer case) drastically 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) = 0.50
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.
Material specification
| 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 |
Check out also products
Strengths as well as weaknesses of neodymium magnets.
Benefits
- They retain full power for nearly 10 years – the drop is just ~1% (in theory),
- Magnets perfectly defend themselves against loss of magnetization caused by ambient magnetic noise,
- In other words, due to the shiny layer of silver, the element becomes visually attractive,
- The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Considering the ability of flexible shaping and adaptation to specialized requirements, magnetic components can be created in a wide range of forms and dimensions, which makes them more universal,
- Significant place in innovative solutions – they find application in mass storage devices, brushless drives, diagnostic systems, as well as industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in small systems
Cons
- At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Due to limitations in creating nuts and complex forms in magnets, we recommend using casing - magnetic holder.
- Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these devices are able to be problematic in diagnostics medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Lifting parameters
Maximum lifting force for a neodymium magnet – what affects it?
- using a sheet made of high-permeability steel, serving as a magnetic yoke
- with a thickness no less than 10 mm
- characterized by lack of roughness
- without the slightest air gap between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- at ambient temperature room level
Practical aspects of lifting capacity – factors
- Clearance – the presence of foreign body (paint, tape, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
- Material type – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
- Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. 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 suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate reduces the load capacity.
Warnings
Warning for heart patients
For implant holders: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or request help to handle the magnets.
Keep away from children
Strictly store magnets out of reach of children. Choking hazard is significant, and the effects of magnets clamping inside the body are very dangerous.
Do not overheat magnets
Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.
Compass and GPS
Navigation devices and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can permanently damage the sensors in your phone.
Conscious usage
Handle magnets consciously. Their powerful strength can shock even professionals. Stay alert and respect their power.
Finger safety
Big blocks can smash fingers in a fraction of a second. Do not place your hand betwixt two strong magnets.
Threat to electronics
Avoid bringing magnets close to a purse, computer, or TV. The magnetism can destroy these devices and erase data from cards.
Beware of splinters
Watch out for shards. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
Allergy Warning
Allergy Notice: The nickel-copper-nickel coating consists of nickel. If redness appears, immediately stop handling magnets and use protective gear.
Fire warning
Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.
