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 data - 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 |
Engineering analysis of the magnet - technical parameters
These values constitute the outcome of a engineering calculation. Values are based on models for the material Nd2Fe14B. Operational conditions might slightly differ from theoretical values. Treat these data as a supplementary guide for designers.
Table 1: Static pull force (pull vs distance) - characteristics
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
|
dangerous! |
| 1 mm |
3175 Gs
317.5 mT
|
30.18 kg / 66.54 LBS
30182.9 g / 296.1 N
|
dangerous! |
| 2 mm |
3029 Gs
302.9 mT
|
27.46 kg / 60.55 LBS
27464.0 g / 269.4 N
|
dangerous! |
| 3 mm |
2875 Gs
287.5 mT
|
24.74 kg / 54.55 LBS
24742.8 g / 242.7 N
|
dangerous! |
| 5 mm |
2556 Gs
255.6 mT
|
19.56 kg / 43.13 LBS
19563.2 g / 191.9 N
|
dangerous! |
| 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
|
safe |
| 50 mm |
132 Gs
13.2 mT
|
0.05 kg / 0.12 LBS
52.4 g / 0.5 N
|
safe |
Table 2: Vertical hold (wall)
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 (sliding) - 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: Steel thickness (saturation) - 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: Working in heat (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 (attraction) - forces in the system
MW 38x12 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (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: Hazards (implants) - precautionary measures
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 (kinetic energy) - 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 (Flux)
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)
*Note: On a vertical wall, the magnet holds just approx. 20-30% of its max power.
2. Steel thickness impact
*Thin metal sheet (e.g. computer case) severely weakens the holding force.
3. Heat tolerance
*For standard magnets, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.42
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.
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 |
Other proposals
Advantages and disadvantages of neodymium magnets.
Pros
- Their strength remains stable, and after around ten years it decreases only by ~1% (theoretically),
- They are resistant to demagnetization induced by external field influence,
- A magnet with a metallic gold surface has better aesthetics,
- Magnets are distinguished by excellent magnetic induction on the surface,
- 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 option of flexible shaping and adaptation to custom projects, NdFeB magnets can be manufactured in a variety of shapes and sizes, which makes them more universal,
- Key role in advanced technology sectors – they serve a role in magnetic memories, electric motors, medical devices, and industrial machines.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Cons
- At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- We recommend a housing - magnetic mount, due to difficulties in creating nuts inside the magnet and complex shapes.
- Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can complicate diagnosis medical after entering the body.
- Due to neodymium price, their price is higher than average,
Pull force analysis
Maximum holding power of the magnet – what affects it?
- using a sheet made of high-permeability steel, acting as a ideal flux conductor
- possessing a massiveness of min. 10 mm to avoid saturation
- characterized by smoothness
- under conditions of ideal adhesion (surface-to-surface)
- during detachment in a direction vertical to the mounting surface
- at ambient temperature approx. 20 degrees Celsius
Determinants of lifting force in real conditions
- Distance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Plate thickness – insufficiently thick plate does not accept the full field, causing part of the flux to be lost to the other side.
- Material type – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
- Surface finish – full contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate decreases the lifting capacity.
Safe handling of NdFeB magnets
Swallowing risk
NdFeB magnets are not toys. Accidental ingestion of several magnets can lead to them attracting across intestines, which poses a direct threat to life and necessitates immediate surgery.
Data carriers
Powerful magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Health Danger
People with a pacemaker should maintain an absolute distance from magnets. The magnetic field can interfere with the functioning of the implant.
Nickel coating and allergies
Some people experience a contact allergy to nickel, which is the common plating for neodymium magnets. Extended handling may cause an allergic reaction. We recommend wear safety gloves.
Protective goggles
Watch out for shards. Magnets can fracture upon violent connection, launching sharp fragments into the air. Wear goggles.
Do not underestimate power
Use magnets with awareness. Their immense force can shock even professionals. Be vigilant and do not underestimate their power.
Flammability
Machining of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.
Permanent damage
Do not overheat. Neodymium magnets are susceptible to heat. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Physical harm
Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.
Impact on smartphones
Note: neodymium magnets generate a field that confuses sensitive sensors. Maintain a safe distance from your phone, device, and navigation systems.
