MW 3x2 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010064
GTIN/EAN: 5906301810636
Diameter Ø
3 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
0.11 g
Magnetization Direction
↑ axial
Load capacity
0.30 kg / 2.99 N
Magnetic Induction
493.99 mT / 4940 Gs
Coating
[NiCuNi] Nickel
0.1476 ZŁ with VAT / pcs + price for transport
0.1200 ZŁ net + 23% VAT / pcs
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Technical parameters - MW 3x2 / N38 - cylindrical magnet
Specification / characteristics - MW 3x2 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010064 |
| GTIN/EAN | 5906301810636 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 3 mm [±0,1 mm] |
| Height | 2 mm [±0,1 mm] |
| Weight | 0.11 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.30 kg / 2.99 N |
| Magnetic Induction ~ ? | 493.99 mT / 4940 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 modeling of the assembly - technical parameters
These values represent the result of a engineering analysis. Results are based on algorithms for the material Nd2Fe14B. Operational conditions might slightly differ. Treat these calculations as a preliminary roadmap during assembly planning.
Table 1: Static force (pull vs gap) - power drop
MW 3x2 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
4928 Gs
492.8 mT
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
low risk |
| 1 mm |
2106 Gs
210.6 mT
|
0.05 kg / 0.12 LBS
54.8 g / 0.5 N
|
low risk |
| 2 mm |
845 Gs
84.5 mT
|
0.01 kg / 0.02 LBS
8.8 g / 0.1 N
|
low risk |
| 3 mm |
393 Gs
39.3 mT
|
0.00 kg / 0.00 LBS
1.9 g / 0.0 N
|
low risk |
| 5 mm |
124 Gs
12.4 mT
|
0.00 kg / 0.00 LBS
0.2 g / 0.0 N
|
low risk |
| 10 mm |
21 Gs
2.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 15 mm |
7 Gs
0.7 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 20 mm |
3 Gs
0.3 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 30 mm |
1 Gs
0.1 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
| 50 mm |
0 Gs
0.0 mT
|
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
low risk |
Table 2: Slippage load (vertical surface)
MW 3x2 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.06 kg / 0.13 LBS
60.0 g / 0.6 N
|
| 1 mm | Stal (~0.2) |
0.01 kg / 0.02 LBS
10.0 g / 0.1 N
|
| 2 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
2.0 g / 0.0 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 5 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 10 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 15 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 20 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 30 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
| 50 mm | Stal (~0.2) |
0.00 kg / 0.00 LBS
0.0 g / 0.0 N
|
Table 3: Vertical assembly (shearing) - vertical pull
MW 3x2 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.09 kg / 0.20 LBS
90.0 g / 0.9 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.06 kg / 0.13 LBS
60.0 g / 0.6 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.03 kg / 0.07 LBS
30.0 g / 0.3 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.15 kg / 0.33 LBS
150.0 g / 1.5 N
|
Table 4: Steel thickness (substrate influence) - power losses
MW 3x2 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.03 kg / 0.07 LBS
30.0 g / 0.3 N
|
| 1 mm |
|
0.08 kg / 0.17 LBS
75.0 g / 0.7 N
|
| 2 mm |
|
0.15 kg / 0.33 LBS
150.0 g / 1.5 N
|
| 3 mm |
|
0.22 kg / 0.50 LBS
225.0 g / 2.2 N
|
| 5 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
| 10 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
| 11 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
| 12 mm |
|
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
Table 5: Thermal stability (stability) - resistance threshold
MW 3x2 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.30 kg / 0.66 LBS
300.0 g / 2.9 N
|
OK |
| 40 °C | -2.2% |
0.29 kg / 0.65 LBS
293.4 g / 2.9 N
|
OK |
| 60 °C | -4.4% |
0.29 kg / 0.63 LBS
286.8 g / 2.8 N
|
OK |
| 80 °C | -6.6% |
0.28 kg / 0.62 LBS
280.2 g / 2.7 N
|
|
| 100 °C | -28.8% |
0.21 kg / 0.47 LBS
213.6 g / 2.1 N
|
Table 6: Two magnets (repulsion) - forces in the system
MW 3x2 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Sliding Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
1.06 kg / 2.33 LBS
5 766 Gs
|
0.16 kg / 0.35 LBS
159 g / 1.6 N
|
N/A |
| 1 mm |
0.49 kg / 1.08 LBS
6 712 Gs
|
0.07 kg / 0.16 LBS
74 g / 0.7 N
|
0.44 kg / 0.97 LBS
~0 Gs
|
| 2 mm |
0.19 kg / 0.43 LBS
4 213 Gs
|
0.03 kg / 0.06 LBS
29 g / 0.3 N
|
0.17 kg / 0.38 LBS
~0 Gs
|
| 3 mm |
0.08 kg / 0.17 LBS
2 629 Gs
|
0.01 kg / 0.02 LBS
11 g / 0.1 N
|
0.07 kg / 0.15 LBS
~0 Gs
|
| 5 mm |
0.01 kg / 0.03 LBS
1 131 Gs
|
0.00 kg / 0.00 LBS
2 g / 0.0 N
|
0.01 kg / 0.03 LBS
~0 Gs
|
| 10 mm |
0.00 kg / 0.00 LBS
248 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 20 mm |
0.00 kg / 0.00 LBS
41 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 LBS
3 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 60 mm |
0.00 kg / 0.00 LBS
2 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 70 mm |
0.00 kg / 0.00 LBS
1 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 80 mm |
0.00 kg / 0.00 LBS
1 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 90 mm |
0.00 kg / 0.00 LBS
1 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
| 100 mm |
0.00 kg / 0.00 LBS
0 Gs
|
0.00 kg / 0.00 LBS
0 g / 0.0 N
|
0.00 kg / 0.00 LBS
~0 Gs
|
Table 7: Protective zones (electronics) - precautionary measures
MW 3x2 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 2.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 1.5 cm |
| Mechanical watch | 20 Gs (2.0 mT) | 1.5 cm |
| Mobile device | 40 Gs (4.0 mT) | 1.0 cm |
| Remote | 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: Collisions (kinetic energy) - warning
MW 3x2 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
52.67 km/h
(14.63 m/s)
|
0.01 J | |
| 30 mm |
91.22 km/h
(25.34 m/s)
|
0.04 J | |
| 50 mm |
117.77 km/h
(32.71 m/s)
|
0.06 J | |
| 100 mm |
166.55 km/h
(46.26 m/s)
|
0.12 J |
Table 9: Surface protection spec
MW 3x2 / 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 3x2 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 353 Mx | 3.5 µWb |
| Pc Coefficient | 0.71 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 3x2 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.30 kg | Standard |
| Water (riverbed) |
0.34 kg
(+0.04 kg buoyancy gain)
|
+14.5% |
1. Vertical hold
*Note: On a vertical wall, the magnet holds merely a fraction of its nominal pull.
2. Steel saturation
*Thin metal sheet (e.g. computer case) significantly reduces the holding force.
3. Heat tolerance
*For N38 grade, the max working temp is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other offers
Advantages as well as disadvantages of Nd2Fe14B magnets.
Pros
- They do not lose power, even after approximately 10 years – the drop in power is only ~1% (according to tests),
- Magnets very well protect themselves against loss of magnetization caused by external fields,
- In other words, due to the metallic surface of nickel, the element gains a professional look,
- They are known for high magnetic induction at the operating surface, which affects their effectiveness,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- In view of the ability of precise shaping and customization to specialized needs, magnetic components can be manufactured in a wide range of geometric configurations, which expands the range of possible applications,
- Universal use in modern industrial fields – they serve a role in hard drives, brushless drives, precision medical tools, also multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in compact constructions
Cons
- At very strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
- We suggest a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, small components of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
- With large orders the cost of neodymium magnets is a challenge,
Lifting parameters
Highest magnetic holding force – what it depends on?
- on a plate made of mild steel, effectively closing the magnetic flux
- with a cross-section of at least 10 mm
- with a surface cleaned and smooth
- with zero gap (no paint)
- for force applied at a right angle (in the magnet axis)
- at temperature room level
Key elements affecting lifting force
- Air gap (betwixt the magnet and the plate), since even a very small distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Angle of force application – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
- Plate material – low-carbon steel attracts best. Alloy steels decrease magnetic properties and lifting capacity.
- Surface condition – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
- Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.
Warnings
Risk of cracking
NdFeB magnets are ceramic materials, meaning they are very brittle. Impact of two magnets will cause them breaking into small pieces.
Electronic devices
Powerful magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.
Sensitization to coating
Studies show that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, avoid direct skin contact and opt for versions in plastic housing.
Physical harm
Big blocks can crush fingers in a fraction of a second. Do not place your hand between two strong magnets.
Caution required
Handle magnets with awareness. Their huge power can surprise even professionals. Be vigilant and do not underestimate their force.
Compass and GPS
GPS units and smartphones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.
Pacemakers
People with a ICD must keep an absolute distance from magnets. The magnetic field can stop the operation of the life-saving device.
Maximum temperature
Avoid heat. Neodymium magnets are susceptible to heat. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).
Do not give to children
Absolutely store magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are fatal.
Fire risk
Dust created during grinding of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.
