MW 3x1 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010063
GTIN/EAN: 5906301810629
Diameter Ø
3 mm [±0,1 mm]
Height
1 mm [±0,1 mm]
Weight
0.05 g
Magnetization Direction
↑ axial
Load capacity
0.21 kg / 2.10 N
Magnetic Induction
342.82 mT / 3428 Gs
Coating
[NiCuNi] Nickel
0.1353 ZŁ with VAT / pcs + price for transport
0.1100 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - MW 3x1 / N38 - cylindrical magnet
Specification / characteristics - MW 3x1 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010063 |
| GTIN/EAN | 5906301810629 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 3 mm [±0,1 mm] |
| Height | 1 mm [±0,1 mm] |
| Weight | 0.05 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.21 kg / 2.10 N |
| Magnetic Induction ~ ? | 342.82 mT / 3428 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 |
Physical analysis of the assembly - technical parameters
These data are the result of a mathematical calculation. Results rely on algorithms for the material Nd2Fe14B. Operational conditions may deviate from the simulation results. Please consider these calculations as a supplementary guide for designers.
Table 1: Static pull force (force vs gap) - power drop
MW 3x1 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
3422 Gs
342.2 mT
|
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
|
low risk |
| 1 mm |
1521 Gs
152.1 mT
|
0.04 kg / 0.09 pounds
41.5 g / 0.4 N
|
low risk |
| 2 mm |
585 Gs
58.5 mT
|
0.01 kg / 0.01 pounds
6.1 g / 0.1 N
|
low risk |
| 3 mm |
260 Gs
26.0 mT
|
0.00 kg / 0.00 pounds
1.2 g / 0.0 N
|
low risk |
| 5 mm |
76 Gs
7.6 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
low risk |
| 10 mm |
12 Gs
1.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 15 mm |
4 Gs
0.4 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 20 mm |
2 Gs
0.2 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 30 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
low risk |
Table 2: Sliding capacity (vertical surface)
MW 3x1 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.04 kg / 0.09 pounds
42.0 g / 0.4 N
|
| 1 mm | Stal (~0.2) |
0.01 kg / 0.02 pounds
8.0 g / 0.1 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
2.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
Table 3: Wall mounting (sliding) - vertical pull
MW 3x1 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.06 kg / 0.14 pounds
63.0 g / 0.6 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.04 kg / 0.09 pounds
42.0 g / 0.4 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.02 kg / 0.05 pounds
21.0 g / 0.2 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.11 kg / 0.23 pounds
105.0 g / 1.0 N
|
Table 4: Material efficiency (saturation) - sheet metal selection
MW 3x1 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.02 kg / 0.05 pounds
21.0 g / 0.2 N
|
| 1 mm |
|
0.05 kg / 0.12 pounds
52.5 g / 0.5 N
|
| 2 mm |
|
0.11 kg / 0.23 pounds
105.0 g / 1.0 N
|
| 3 mm |
|
0.16 kg / 0.35 pounds
157.5 g / 1.5 N
|
| 5 mm |
|
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
|
| 10 mm |
|
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
|
| 11 mm |
|
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
|
| 12 mm |
|
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 3x1 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.21 kg / 0.46 pounds
210.0 g / 2.1 N
|
OK |
| 40 °C | -2.2% |
0.21 kg / 0.45 pounds
205.4 g / 2.0 N
|
OK |
| 60 °C | -4.4% |
0.20 kg / 0.44 pounds
200.8 g / 2.0 N
|
|
| 80 °C | -6.6% |
0.20 kg / 0.43 pounds
196.1 g / 1.9 N
|
|
| 100 °C | -28.8% |
0.15 kg / 0.33 pounds
149.5 g / 1.5 N
|
Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 3x1 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
0.51 kg / 1.12 pounds
4 928 Gs
|
0.08 kg / 0.17 pounds
77 g / 0.8 N
|
N/A |
| 1 mm |
0.26 kg / 0.56 pounds
4 847 Gs
|
0.04 kg / 0.08 pounds
38 g / 0.4 N
|
0.23 kg / 0.51 pounds
~0 Gs
|
| 2 mm |
0.10 kg / 0.22 pounds
3 042 Gs
|
0.02 kg / 0.03 pounds
15 g / 0.1 N
|
0.09 kg / 0.20 pounds
~0 Gs
|
| 3 mm |
0.04 kg / 0.08 pounds
1 865 Gs
|
0.01 kg / 0.01 pounds
6 g / 0.1 N
|
0.03 kg / 0.08 pounds
~0 Gs
|
| 5 mm |
0.01 kg / 0.01 pounds
764 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 pounds
153 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 pounds
23 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
2 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 pounds
1 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 pounds
0 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 pounds
0 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 pounds
0 Gs
|
0.00 kg / 0.00 pounds
0 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
Table 7: Safety (HSE) (implants) - precautionary measures
MW 3x1 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 1.5 cm |
| Hearing aid | 10 Gs (1.0 mT) | 1.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 1.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.0 cm |
| Car key | 50 Gs (5.0 mT) | 1.0 cm |
| Payment card | 400 Gs (40.0 mT) | 0.5 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 0.5 cm |
Table 8: Impact energy (kinetic energy) - warning
MW 3x1 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
65.36 km/h
(18.16 m/s)
|
0.01 J | |
| 30 mm |
113.21 km/h
(31.45 m/s)
|
0.02 J | |
| 50 mm |
146.15 km/h
(40.60 m/s)
|
0.04 J | |
| 100 mm |
206.68 km/h
(57.41 m/s)
|
0.08 J |
Table 9: Anti-corrosion coating durability
MW 3x1 / 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 3x1 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 257 Mx | 2.6 µWb |
| Pc Coefficient | 0.44 | Low (Flat) |
Table 11: Underwater work (magnet fishing)
MW 3x1 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.21 kg | Standard |
| Water (riverbed) |
0.24 kg
(+0.03 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Caution: On a vertical surface, the magnet retains just a fraction of its max power.
2. Steel thickness impact
*Thin steel (e.g. 0.5mm PC case) drastically reduces the holding force.
3. Temperature resistance
*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) = 0.44
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 deals
Strengths as well as weaknesses of Nd2Fe14B magnets.
Strengths
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (according to literature),
- They feature excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
- The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- They feature high magnetic induction at the operating surface, which affects their effectiveness,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Possibility of custom forming as well as optimizing to defined conditions,
- Huge importance in high-tech industry – they are used in mass storage devices, electric drive systems, advanced medical instruments, and technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which allows their use in miniature devices
Weaknesses
- Brittleness is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- 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, in case of application outdoors
- We recommend a housing - magnetic holder, due to difficulties in producing threads inside the magnet and complicated shapes.
- Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small elements of these devices can be problematic in diagnostics medical when they are in the body.
- Due to expensive raw materials, their price is relatively high,
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what affects it?
- on a plate made of structural steel, effectively closing the magnetic flux
- whose thickness equals approx. 10 mm
- with an polished contact surface
- under conditions of no distance (metal-to-metal)
- for force acting at a right angle (in the magnet axis)
- at ambient temperature room level
Impact of factors on magnetic holding capacity in practice
- Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Direction of force – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Plate material – mild steel gives the best results. Alloy admixtures reduce magnetic properties and holding force.
- Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the load capacity.
H&S for magnets
Phone sensors
Navigation devices and mobile phones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the sensors in your phone.
Metal Allergy
It is widely known that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from direct skin contact and select versions in plastic housing.
Maximum temperature
Avoid heat. Neodymium magnets are sensitive to temperature. If you need operation above 80°C, inquire about HT versions (H, SH, UH).
Health Danger
For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.
Protect data
Do not bring magnets close to a purse, computer, or TV. The magnetism can destroy these devices and wipe information from cards.
No play value
Neodymium magnets are not toys. Accidental ingestion of multiple magnets may result in them pinching intestinal walls, which poses a severe health hazard and necessitates immediate surgery.
Bone fractures
Big blocks can crush fingers instantly. Under no circumstances put your hand betwixt two attracting surfaces.
Magnet fragility
Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.
Do not underestimate power
Use magnets consciously. Their huge power can surprise even professionals. Plan your moves and respect their power.
Mechanical processing
Powder produced during grinding of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.
