MW 38x3.5 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010062
GTIN/EAN: 5906301810612
Diameter Ø
38 mm [±0,1 mm]
Height
3.5 mm [±0,1 mm]
Weight
29.77 g
Magnetization Direction
↑ axial
Load capacity
5.09 kg / 49.91 N
Magnetic Induction
112.31 mT / 1123 Gs
Coating
[NiCuNi] Nickel
15.83 ZŁ with VAT / pcs + price for transport
12.87 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - MW 38x3.5 / N38 - cylindrical magnet
Specification / characteristics - MW 38x3.5 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010062 |
| GTIN/EAN | 5906301810612 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 38 mm [±0,1 mm] |
| Height | 3.5 mm [±0,1 mm] |
| Weight | 29.77 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 5.09 kg / 49.91 N |
| Magnetic Induction ~ ? | 112.31 mT / 1123 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 modeling of the magnet - technical parameters
The following information are the outcome of a physical analysis. Results rely on algorithms for the material Nd2Fe14B. Operational performance might slightly differ from theoretical values. Use these data as a reference point for designers.
Table 1: Static force (pull vs distance) - characteristics
MW 38x3.5 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
1123 Gs
112.3 mT
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
strong |
| 1 mm |
1103 Gs
110.3 mT
|
4.91 kg / 10.82 LBS
4910.1 g / 48.2 N
|
strong |
| 2 mm |
1075 Gs
107.5 mT
|
4.66 kg / 10.28 LBS
4663.0 g / 45.7 N
|
strong |
| 3 mm |
1040 Gs
104.0 mT
|
4.36 kg / 9.62 LBS
4364.2 g / 42.8 N
|
strong |
| 5 mm |
954 Gs
95.4 mT
|
3.67 kg / 8.10 LBS
3673.1 g / 36.0 N
|
strong |
| 10 mm |
703 Gs
70.3 mT
|
2.00 kg / 4.40 LBS
1997.1 g / 19.6 N
|
low risk |
| 15 mm |
483 Gs
48.3 mT
|
0.94 kg / 2.08 LBS
943.2 g / 9.3 N
|
low risk |
| 20 mm |
326 Gs
32.6 mT
|
0.43 kg / 0.95 LBS
429.7 g / 4.2 N
|
low risk |
| 30 mm |
155 Gs
15.5 mT
|
0.10 kg / 0.21 LBS
97.1 g / 1.0 N
|
low risk |
| 50 mm |
47 Gs
4.7 mT
|
0.01 kg / 0.02 LBS
8.9 g / 0.1 N
|
low risk |
Table 2: Sliding force (vertical surface)
MW 38x3.5 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
1.02 kg / 2.24 LBS
1018.0 g / 10.0 N
|
| 1 mm | Stal (~0.2) |
0.98 kg / 2.16 LBS
982.0 g / 9.6 N
|
| 2 mm | Stal (~0.2) |
0.93 kg / 2.05 LBS
932.0 g / 9.1 N
|
| 3 mm | Stal (~0.2) |
0.87 kg / 1.92 LBS
872.0 g / 8.6 N
|
| 5 mm | Stal (~0.2) |
0.73 kg / 1.62 LBS
734.0 g / 7.2 N
|
| 10 mm | Stal (~0.2) |
0.40 kg / 0.88 LBS
400.0 g / 3.9 N
|
| 15 mm | Stal (~0.2) |
0.19 kg / 0.41 LBS
188.0 g / 1.8 N
|
| 20 mm | Stal (~0.2) |
0.09 kg / 0.19 LBS
86.0 g / 0.8 N
|
| 30 mm | Stal (~0.2) |
0.02 kg / 0.04 LBS
20.0 g / 0.2 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 38x3.5 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
1.53 kg / 3.37 LBS
1527.0 g / 15.0 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
1.02 kg / 2.24 LBS
1018.0 g / 10.0 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.51 kg / 1.12 LBS
509.0 g / 5.0 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
2.55 kg / 5.61 LBS
2545.0 g / 25.0 N
|
Table 4: Steel thickness (saturation) - power losses
MW 38x3.5 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.51 kg / 1.12 LBS
509.0 g / 5.0 N
|
| 1 mm |
|
1.27 kg / 2.81 LBS
1272.5 g / 12.5 N
|
| 2 mm |
|
2.55 kg / 5.61 LBS
2545.0 g / 25.0 N
|
| 3 mm |
|
3.82 kg / 8.42 LBS
3817.5 g / 37.4 N
|
| 5 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
| 10 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
| 11 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
| 12 mm |
|
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
Table 5: Thermal resistance (material behavior) - power drop
MW 38x3.5 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
5.09 kg / 11.22 LBS
5090.0 g / 49.9 N
|
OK |
| 40 °C | -2.2% |
4.98 kg / 10.97 LBS
4978.0 g / 48.8 N
|
OK |
| 60 °C | -4.4% |
4.87 kg / 10.73 LBS
4866.0 g / 47.7 N
|
|
| 80 °C | -6.6% |
4.75 kg / 10.48 LBS
4754.1 g / 46.6 N
|
|
| 100 °C | -28.8% |
3.62 kg / 7.99 LBS
3624.1 g / 35.6 N
|
Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 38x3.5 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Strength (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
8.82 kg / 19.44 LBS
2 143 Gs
|
1.32 kg / 2.92 LBS
1323 g / 13.0 N
|
N/A |
| 1 mm |
8.68 kg / 19.13 LBS
2 228 Gs
|
1.30 kg / 2.87 LBS
1302 g / 12.8 N
|
7.81 kg / 17.22 LBS
~0 Gs
|
| 2 mm |
8.51 kg / 18.75 LBS
2 206 Gs
|
1.28 kg / 2.81 LBS
1276 g / 12.5 N
|
7.66 kg / 16.88 LBS
~0 Gs
|
| 3 mm |
8.31 kg / 18.31 LBS
2 180 Gs
|
1.25 kg / 2.75 LBS
1246 g / 12.2 N
|
7.47 kg / 16.48 LBS
~0 Gs
|
| 5 mm |
7.83 kg / 17.26 LBS
2 116 Gs
|
1.17 kg / 2.59 LBS
1174 g / 11.5 N
|
7.05 kg / 15.53 LBS
~0 Gs
|
| 10 mm |
6.36 kg / 14.03 LBS
1 908 Gs
|
0.95 kg / 2.10 LBS
955 g / 9.4 N
|
5.73 kg / 12.63 LBS
~0 Gs
|
| 20 mm |
3.46 kg / 7.63 LBS
1 407 Gs
|
0.52 kg / 1.14 LBS
519 g / 5.1 N
|
3.11 kg / 6.87 LBS
~0 Gs
|
| 50 mm |
0.35 kg / 0.76 LBS
445 Gs
|
0.05 kg / 0.11 LBS
52 g / 0.5 N
|
0.31 kg / 0.69 LBS
~0 Gs
|
| 60 mm |
0.17 kg / 0.37 LBS
310 Gs
|
0.03 kg / 0.06 LBS
25 g / 0.2 N
|
0.15 kg / 0.33 LBS
~0 Gs
|
| 70 mm |
0.09 kg / 0.19 LBS
222 Gs
|
0.01 kg / 0.03 LBS
13 g / 0.1 N
|
0.08 kg / 0.17 LBS
~0 Gs
|
| 80 mm |
0.05 kg / 0.10 LBS
163 Gs
|
0.01 kg / 0.02 LBS
7 g / 0.1 N
|
0.04 kg / 0.09 LBS
~0 Gs
|
| 90 mm |
0.03 kg / 0.06 LBS
122 Gs
|
0.00 kg / 0.01 LBS
4 g / 0.0 N
|
0.02 kg / 0.05 LBS
~0 Gs
|
| 100 mm |
0.02 kg / 0.03 LBS
94 Gs
|
0.00 kg / 0.01 LBS
2 g / 0.0 N
|
0.01 kg / 0.03 LBS
~0 Gs
|
Table 7: Safety (HSE) (electronics) - warnings
MW 38x3.5 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 11.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 9.0 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 7.0 cm |
| Phone / Smartphone | 40 Gs (4.0 mT) | 5.5 cm |
| Remote | 50 Gs (5.0 mT) | 5.0 cm |
| Payment card | 400 Gs (40.0 mT) | 2.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.5 cm |
Table 8: Impact energy (kinetic energy) - collision effects
MW 38x3.5 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
16.10 km/h
(4.47 m/s)
|
0.30 J | |
| 30 mm |
23.11 km/h
(6.42 m/s)
|
0.61 J | |
| 50 mm |
29.52 km/h
(8.20 m/s)
|
1.00 J | |
| 100 mm |
41.70 km/h
(11.58 m/s)
|
2.00 J |
Table 9: Coating parameters (durability)
MW 38x3.5 / 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: Construction data (Flux)
MW 38x3.5 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 17 022 Mx | 170.2 µWb |
| Pc Coefficient | 0.14 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MW 38x3.5 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 5.09 kg | Standard |
| Water (riverbed) |
5.83 kg
(+0.74 kg buoyancy gain)
|
+14.5% |
1. Wall mount (shear)
*Warning: On a vertical surface, the magnet holds only approx. 20-30% of its max power.
2. Plate thickness effect
*Thin metal sheet (e.g. computer case) drastically limits the holding force.
3. Thermal stability
*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) = 0.14
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 |
See also offers
Pros and cons of neodymium magnets.
Pros
- Their power remains stable, and after around ten years it decreases only by ~1% (theoretically),
- They feature excellent resistance to magnetic field loss due to external fields,
- In other words, due to the metallic finish of gold, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
- Due to the possibility of accurate molding and customization to individualized needs, neodymium magnets can be manufactured in a variety of geometric configurations, which makes them more universal,
- Huge importance in advanced technology sectors – they serve a role in computer drives, brushless drives, advanced medical instruments, and industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Magnets exposed to a humid environment can rust. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing nuts and complicated forms in magnets, we propose using cover - magnetic mechanism.
- Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the context of child health protection. Furthermore, tiny parts of these products can be problematic in diagnostics medical when they are in the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- using a sheet made of low-carbon steel, acting as a circuit closing element
- whose transverse dimension is min. 10 mm
- with an ground contact surface
- without any insulating layer between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
Key elements affecting lifting force
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Steel type – mild steel attracts best. Alloy steels reduce magnetic permeability and holding force.
- Surface finish – full contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
- Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was determined by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate lowers the load capacity.
Warnings
Conscious usage
Use magnets with awareness. Their powerful strength can shock even professionals. Stay alert and respect their power.
Life threat
Individuals with a ICD must keep an safe separation from magnets. The magnetic field can stop the functioning of the implant.
Fragile material
Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Wear goggles.
Physical harm
Danger of trauma: The pulling power is so immense that it can result in blood blisters, crushing, and broken bones. Protective gloves are recommended.
Choking Hazard
Absolutely keep magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are fatal.
Maximum temperature
Avoid heat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).
Combustion hazard
Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.
Compass and GPS
Remember: neodymium magnets produce a field that confuses precision electronics. Maintain a separation from your phone, device, and navigation systems.
Sensitization to coating
Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If an allergic reaction occurs, immediately stop handling magnets and wear gloves.
Magnetic media
Do not bring magnets close to a wallet, laptop, or TV. The magnetism can destroy these devices and wipe information from cards.
