MW 38x12 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010060
GTIN/EAN: 5906301810599
Diameter Ø
38 mm [±0,1 mm]
Height
12 mm [±0,1 mm]
Weight
102.07 g
Magnetization Direction
↑ axial
Load capacity
32.79 kg / 321.71 N
Magnetic Induction
331.00 mT / 3310 Gs
Coating
[NiCuNi] Nickel
32.10 ZŁ with VAT / pcs + price for transport
26.10 ZŁ net + 23% VAT / pcs
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Technical - MW 38x12 / N38 - cylindrical magnet
Specification / characteristics - MW 38x12 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010060 |
| GTIN/EAN | 5906301810599 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 38 mm [±0,1 mm] |
| Height | 12 mm [±0,1 mm] |
| Weight | 102.07 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 32.79 kg / 321.71 N |
| Magnetic Induction ~ ? | 331.00 mT / 3310 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 analysis of the magnet - technical parameters
These values are the result of a engineering analysis. Results are based on models for the class Nd2Fe14B. Real-world parameters might slightly deviate from the simulation results. Please consider these data as a reference point for designers.
Table 1: Static force (pull vs gap) - power drop
MW 38x12 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3309 Gs
330.9 mT
|
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
|
crushing |
| 1 mm |
3175 Gs
317.5 mT
|
30.18 kg / 66.54 lbs
30182.9 g / 296.1 N
|
crushing |
| 2 mm |
3029 Gs
302.9 mT
|
27.46 kg / 60.55 lbs
27464.0 g / 269.4 N
|
crushing |
| 3 mm |
2875 Gs
287.5 mT
|
24.74 kg / 54.55 lbs
24742.8 g / 242.7 N
|
crushing |
| 5 mm |
2556 Gs
255.6 mT
|
19.56 kg / 43.13 lbs
19563.2 g / 191.9 N
|
crushing |
| 10 mm |
1805 Gs
180.5 mT
|
9.75 kg / 21.50 lbs
9750.4 g / 95.7 N
|
strong |
| 15 mm |
1229 Gs
122.9 mT
|
4.52 kg / 9.96 lbs
4519.1 g / 44.3 N
|
strong |
| 20 mm |
836 Gs
83.6 mT
|
2.09 kg / 4.61 lbs
2092.9 g / 20.5 N
|
strong |
| 30 mm |
411 Gs
41.1 mT
|
0.51 kg / 1.11 lbs
505.7 g / 5.0 N
|
weak grip |
| 50 mm |
132 Gs
13.2 mT
|
0.05 kg / 0.12 lbs
52.4 g / 0.5 N
|
weak grip |
Table 2: Sliding hold (vertical surface)
MW 38x12 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
6.56 kg / 14.46 lbs
6558.0 g / 64.3 N
|
| 1 mm | Stal (~0.2) |
6.04 kg / 13.31 lbs
6036.0 g / 59.2 N
|
| 2 mm | Stal (~0.2) |
5.49 kg / 12.11 lbs
5492.0 g / 53.9 N
|
| 3 mm | Stal (~0.2) |
4.95 kg / 10.91 lbs
4948.0 g / 48.5 N
|
| 5 mm | Stal (~0.2) |
3.91 kg / 8.62 lbs
3912.0 g / 38.4 N
|
| 10 mm | Stal (~0.2) |
1.95 kg / 4.30 lbs
1950.0 g / 19.1 N
|
| 15 mm | Stal (~0.2) |
0.90 kg / 1.99 lbs
904.0 g / 8.9 N
|
| 20 mm | Stal (~0.2) |
0.42 kg / 0.92 lbs
418.0 g / 4.1 N
|
| 30 mm | Stal (~0.2) |
0.10 kg / 0.22 lbs
102.0 g / 1.0 N
|
| 50 mm | Stal (~0.2) |
0.01 kg / 0.02 lbs
10.0 g / 0.1 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 38x12 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
9.84 kg / 21.69 lbs
9837.0 g / 96.5 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
6.56 kg / 14.46 lbs
6558.0 g / 64.3 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.28 kg / 7.23 lbs
3279.0 g / 32.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
16.40 kg / 36.14 lbs
16395.0 g / 160.8 N
|
Table 4: Material efficiency (substrate influence) - power losses
MW 38x12 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
1.64 kg / 3.61 lbs
1639.5 g / 16.1 N
|
| 1 mm |
|
4.10 kg / 9.04 lbs
4098.8 g / 40.2 N
|
| 2 mm |
|
8.20 kg / 18.07 lbs
8197.5 g / 80.4 N
|
| 3 mm |
|
12.30 kg / 27.11 lbs
12296.3 g / 120.6 N
|
| 5 mm |
|
20.49 kg / 45.18 lbs
20493.8 g / 201.0 N
|
| 10 mm |
|
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
|
| 11 mm |
|
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
|
| 12 mm |
|
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
|
Table 5: Thermal stability (material behavior) - resistance threshold
MW 38x12 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
32.79 kg / 72.29 lbs
32790.0 g / 321.7 N
|
OK |
| 40 °C | -2.2% |
32.07 kg / 70.70 lbs
32068.6 g / 314.6 N
|
OK |
| 60 °C | -4.4% |
31.35 kg / 69.11 lbs
31347.2 g / 307.5 N
|
|
| 80 °C | -6.6% |
30.63 kg / 67.52 lbs
30625.9 g / 300.4 N
|
|
| 100 °C | -28.8% |
23.35 kg / 51.47 lbs
23346.5 g / 229.0 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 38x12 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
76.58 kg / 168.83 lbs
4 859 Gs
|
11.49 kg / 25.32 lbs
11487 g / 112.7 N
|
N/A |
| 1 mm |
73.60 kg / 162.27 lbs
6 489 Gs
|
11.04 kg / 24.34 lbs
11040 g / 108.3 N
|
66.24 kg / 146.04 lbs
~0 Gs
|
| 2 mm |
70.49 kg / 155.40 lbs
6 350 Gs
|
10.57 kg / 23.31 lbs
10573 g / 103.7 N
|
63.44 kg / 139.86 lbs
~0 Gs
|
| 3 mm |
67.33 kg / 148.43 lbs
6 206 Gs
|
10.10 kg / 22.26 lbs
10099 g / 99.1 N
|
60.59 kg / 133.59 lbs
~0 Gs
|
| 5 mm |
60.95 kg / 134.38 lbs
5 905 Gs
|
9.14 kg / 20.16 lbs
9143 g / 89.7 N
|
54.86 kg / 120.94 lbs
~0 Gs
|
| 10 mm |
45.69 kg / 100.73 lbs
5 113 Gs
|
6.85 kg / 15.11 lbs
6853 g / 67.2 N
|
41.12 kg / 90.65 lbs
~0 Gs
|
| 20 mm |
22.77 kg / 50.20 lbs
3 609 Gs
|
3.42 kg / 7.53 lbs
3416 g / 33.5 N
|
20.49 kg / 45.18 lbs
~0 Gs
|
| 50 mm |
2.34 kg / 5.17 lbs
1 158 Gs
|
0.35 kg / 0.78 lbs
352 g / 3.5 N
|
2.11 kg / 4.65 lbs
~0 Gs
|
| 60 mm |
1.18 kg / 2.60 lbs
822 Gs
|
0.18 kg / 0.39 lbs
177 g / 1.7 N
|
1.06 kg / 2.34 lbs
~0 Gs
|
| 70 mm |
0.63 kg / 1.38 lbs
598 Gs
|
0.09 kg / 0.21 lbs
94 g / 0.9 N
|
0.56 kg / 1.24 lbs
~0 Gs
|
| 80 mm |
0.35 kg / 0.77 lbs
446 Gs
|
0.05 kg / 0.12 lbs
52 g / 0.5 N
|
0.31 kg / 0.69 lbs
~0 Gs
|
| 90 mm |
0.20 kg / 0.45 lbs
340 Gs
|
0.03 kg / 0.07 lbs
30 g / 0.3 N
|
0.18 kg / 0.40 lbs
~0 Gs
|
| 100 mm |
0.12 kg / 0.27 lbs
264 Gs
|
0.02 kg / 0.04 lbs
18 g / 0.2 N
|
0.11 kg / 0.24 lbs
~0 Gs
|
Table 7: Protective zones (implants) - warnings
MW 38x12 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 17.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 13.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 10.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 8.0 cm |
| Remote | 50 Gs (5.0 mT) | 7.5 cm |
| Payment card | 400 Gs (40.0 mT) | 3.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 2.5 cm |
Table 8: Impact energy (cracking risk) - collision effects
MW 38x12 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
21.17 km/h
(5.88 m/s)
|
1.76 J | |
| 30 mm |
31.61 km/h
(8.78 m/s)
|
3.93 J | |
| 50 mm |
40.46 km/h
(11.24 m/s)
|
6.45 J | |
| 100 mm |
57.16 km/h
(15.88 m/s)
|
12.87 J |
Table 9: Anti-corrosion coating durability
MW 38x12 / 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 38x12 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 40 045 Mx | 400.5 µWb |
| Pc Coefficient | 0.42 | Low (Flat) |
Table 11: Submerged application
MW 38x12 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 32.79 kg | Standard |
| Water (riverbed) |
37.54 kg
(+4.75 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Caution: On a vertical wall, the magnet retains merely a fraction of its max power.
2. Efficiency vs thickness
*Thin metal sheet (e.g. 0.5mm PC case) severely weakens the holding force.
3. Power loss vs temp
*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) = 0.42
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.
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
Advantages and disadvantages of neodymium magnets.
Strengths
- They retain magnetic properties for around 10 years – the drop is just ~1% (according to analyses),
- They are resistant to demagnetization induced by presence of other magnetic fields,
- The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to look better,
- They show high magnetic induction at the operating surface, making them more effective,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Due to the possibility of precise forming and adaptation to custom needs, neodymium magnets can be manufactured in a wide range of forms and dimensions, which expands the range of possible applications,
- Wide application in future technologies – they are used in computer drives, electric drive systems, advanced medical instruments, as well as industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages
- To avoid cracks under impact, we recommend using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
- Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in creating nuts and complicated shapes in magnets, we propose using a housing - magnetic mechanism.
- Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
- Due to complex production process, their price is higher than average,
Lifting parameters
Magnetic strength at its maximum – what it depends on?
- on a base made of mild steel, effectively closing the magnetic flux
- whose thickness is min. 10 mm
- characterized by smoothness
- under conditions of gap-free contact (metal-to-metal)
- for force applied at a right angle (pull-off, not shear)
- in stable room temperature
Determinants of lifting force in real conditions
- Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Base massiveness – insufficiently thick sheet causes magnetic saturation, causing part of the power to be escaped into the air.
- Plate material – mild steel attracts best. Higher carbon content lower magnetic permeability and holding force.
- Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
- Temperature – temperature increase results in weakening of force. Check the thermal limit for a given model.
Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces 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 lifting capacity.
Safe handling of NdFeB magnets
Magnets are brittle
Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.
Medical interference
Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.
Skin irritation risks
Studies show that nickel (standard magnet coating) is a common allergen. If your skin reacts to metals, prevent direct skin contact and select coated magnets.
Mechanical processing
Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.
Powerful field
Handle magnets consciously. Their powerful strength can surprise even experienced users. Stay alert and do not underestimate their power.
Keep away from children
NdFeB magnets are not suitable for play. Eating multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and necessitates immediate surgery.
Bodily injuries
Big blocks can crush fingers in a fraction of a second. Under no circumstances put your hand betwixt two attracting surfaces.
Compass and GPS
Be aware: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a separation from your phone, tablet, and GPS.
Keep away from computers
Very strong magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Keep a distance of at least 10 cm.
Heat sensitivity
Do not overheat. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).
