MW 5x30 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010088
GTIN/EAN: 5906301810872
Diameter Ø
5 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
4.42 g
Magnetization Direction
↑ axial
Load capacity
0.45 kg / 4.40 N
Magnetic Induction
616.32 mT / 6163 Gs
Coating
[NiCuNi] Nickel
3.57 ZŁ with VAT / pcs + price for transport
2.90 ZŁ net + 23% VAT / pcs
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Product card - MW 5x30 / N38 - cylindrical magnet
Specification / characteristics - MW 5x30 / N38 - cylindrical magnet
| properties | values |
|---|---|
| Cat. no. | 010088 |
| GTIN/EAN | 5906301810872 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 5 mm [±0,1 mm] |
| Height | 30 mm [±0,1 mm] |
| Weight | 4.42 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 0.45 kg / 4.40 N |
| Magnetic Induction ~ ? | 616.32 mT / 6163 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 simulation of the assembly - report
These information constitute the direct effect of a physical simulation. Values rely on algorithms for the class Nd2Fe14B. Real-world performance may differ. Please consider these data as a supplementary guide when designing systems.
Table 1: Static force (force vs gap) - power drop
MW 5x30 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg/lbs/g/N) | Risk Status |
|---|---|---|---|
| 0 mm |
6154 Gs
615.4 mT
|
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
|
weak grip |
| 1 mm |
3877 Gs
387.7 mT
|
0.18 kg / 0.39 pounds
178.6 g / 1.8 N
|
weak grip |
| 2 mm |
2308 Gs
230.8 mT
|
0.06 kg / 0.14 pounds
63.3 g / 0.6 N
|
weak grip |
| 3 mm |
1419 Gs
141.9 mT
|
0.02 kg / 0.05 pounds
23.9 g / 0.2 N
|
weak grip |
| 5 mm |
639 Gs
63.9 mT
|
0.00 kg / 0.01 pounds
4.8 g / 0.0 N
|
weak grip |
| 10 mm |
173 Gs
17.3 mT
|
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
|
weak grip |
| 15 mm |
75 Gs
7.5 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
weak grip |
| 20 mm |
40 Gs
4.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 30 mm |
16 Gs
1.6 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
weak grip |
Table 2: Sliding capacity (wall)
MW 5x30 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg/lbs/g/N) |
|---|---|---|
| 0 mm | Stal (~0.2) |
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
|
| 1 mm | Stal (~0.2) |
0.04 kg / 0.08 pounds
36.0 g / 0.4 N
|
| 2 mm | Stal (~0.2) |
0.01 kg / 0.03 pounds
12.0 g / 0.1 N
|
| 3 mm | Stal (~0.2) |
0.00 kg / 0.01 pounds
4.0 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 (shearing) - behavior on slippery surfaces
MW 5x30 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg/lbs/g/N) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
0.14 kg / 0.30 pounds
135.0 g / 1.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
0.09 kg / 0.20 pounds
90.0 g / 0.9 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
0.05 kg / 0.10 pounds
45.0 g / 0.4 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
0.23 kg / 0.50 pounds
225.0 g / 2.2 N
|
Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 5x30 / N38
| Steel thickness (mm) | % power | Real pull force (kg/lbs/g/N) |
|---|---|---|
| 0.5 mm |
|
0.05 kg / 0.10 pounds
45.0 g / 0.4 N
|
| 1 mm |
|
0.11 kg / 0.25 pounds
112.5 g / 1.1 N
|
| 2 mm |
|
0.23 kg / 0.50 pounds
225.0 g / 2.2 N
|
| 3 mm |
|
0.34 kg / 0.74 pounds
337.5 g / 3.3 N
|
| 5 mm |
|
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
|
| 10 mm |
|
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
|
| 11 mm |
|
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
|
| 12 mm |
|
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
|
Table 5: Thermal resistance (stability) - resistance threshold
MW 5x30 / N38
| Ambient temp. (°C) | Power loss | Remaining pull (kg/lbs/g/N) | Status |
|---|---|---|---|
| 20 °C | 0.0% |
0.45 kg / 0.99 pounds
450.0 g / 4.4 N
|
OK |
| 40 °C | -2.2% |
0.44 kg / 0.97 pounds
440.1 g / 4.3 N
|
OK |
| 60 °C | -4.4% |
0.43 kg / 0.95 pounds
430.2 g / 4.2 N
|
OK |
| 80 °C | -6.6% |
0.42 kg / 0.93 pounds
420.3 g / 4.1 N
|
|
| 100 °C | -28.8% |
0.32 kg / 0.71 pounds
320.4 g / 3.1 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MW 5x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Shear Force (kg/lbs/g/N) | Repulsion (kg/lbs) (N-N) |
|---|---|---|---|
| 0 mm |
4.58 kg / 10.11 pounds
6 170 Gs
|
0.69 kg / 1.52 pounds
688 g / 6.7 N
|
N/A |
| 1 mm |
2.98 kg / 6.57 pounds
9 927 Gs
|
0.45 kg / 0.99 pounds
447 g / 4.4 N
|
2.68 kg / 5.92 pounds
~0 Gs
|
| 2 mm |
1.82 kg / 4.01 pounds
7 755 Gs
|
0.27 kg / 0.60 pounds
273 g / 2.7 N
|
1.64 kg / 3.61 pounds
~0 Gs
|
| 3 mm |
1.08 kg / 2.39 pounds
5 981 Gs
|
0.16 kg / 0.36 pounds
162 g / 1.6 N
|
0.97 kg / 2.15 pounds
~0 Gs
|
| 5 mm |
0.39 kg / 0.86 pounds
3 595 Gs
|
0.06 kg / 0.13 pounds
59 g / 0.6 N
|
0.35 kg / 0.78 pounds
~0 Gs
|
| 10 mm |
0.05 kg / 0.11 pounds
1 278 Gs
|
0.01 kg / 0.02 pounds
7 g / 0.1 N
|
0.04 kg / 0.10 pounds
~0 Gs
|
| 20 mm |
0.00 kg / 0.01 pounds
346 Gs
|
0.00 kg / 0.00 pounds
1 g / 0.0 N
|
0.00 kg / 0.00 pounds
~0 Gs
|
| 50 mm |
0.00 kg / 0.00 pounds
49 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
32 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
22 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
16 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
12 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
9 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 5x30 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 5.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 4.0 cm |
| Timepiece | 20 Gs (2.0 mT) | 3.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 2.5 cm |
| Remote | 50 Gs (5.0 mT) | 2.0 cm |
| Payment card | 400 Gs (40.0 mT) | 1.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 1.0 cm |
Table 8: Collisions (kinetic energy) - warning
MW 5x30 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
10.18 km/h
(2.83 m/s)
|
0.02 J | |
| 30 mm |
17.63 km/h
(4.90 m/s)
|
0.05 J | |
| 50 mm |
22.75 km/h
(6.32 m/s)
|
0.09 J | |
| 100 mm |
32.18 km/h
(8.94 m/s)
|
0.18 J |
Table 9: Anti-corrosion coating durability
MW 5x30 / 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 5x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 468 Mx | 14.7 µWb |
| Pc Coefficient | 1.59 | High (Stable) |
Table 11: Hydrostatics and buoyancy
MW 5x30 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 0.45 kg | Standard |
| Water (riverbed) |
0.52 kg
(+0.07 kg buoyancy gain)
|
+14.5% |
1. Sliding resistance
*Caution: On a vertical surface, the magnet holds merely a fraction of its perpendicular strength.
2. Steel saturation
*Thin metal sheet (e.g. computer case) significantly limits the holding force.
3. Power loss vs temp
*For standard magnets, the safety limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.59
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 and disadvantages of neodymium magnets.
Advantages
- They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
- Neodymium magnets prove to be highly resistant to loss of magnetic properties caused by magnetic disturbances,
- Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
- The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Thanks to versatility in constructing and the ability to customize to complex applications,
- Universal use in high-tech industry – they serve a role in hard drives, electric motors, diagnostic systems, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in miniature devices
Cons
- At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose their force 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
- Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- We recommend a housing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated shapes.
- Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to disrupt the diagnostic process medical after entering the body.
- With large orders the cost of neodymium magnets is economically unviable,
Lifting parameters
Maximum magnetic pulling force – what contributes to it?
- using a base made of high-permeability steel, functioning as a magnetic yoke
- with a thickness of at least 10 mm
- characterized by even structure
- without any insulating layer between the magnet and steel
- under perpendicular force direction (90-degree angle)
- at standard ambient temperature
Lifting capacity in real conditions – factors
- Air gap (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
- Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
- Material type – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
- Base smoothness – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.
Warnings
Precision electronics
A powerful magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid damaging the sensors.
Medical interference
For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or request help to work with the magnets.
Protective goggles
Watch out for shards. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.
Electronic devices
Do not bring magnets near a purse, computer, or TV. The magnetism can destroy these devices and wipe information from cards.
Adults only
Always keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets connecting inside the body are very dangerous.
Metal Allergy
Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, cease handling magnets and wear gloves.
Permanent damage
Watch the temperature. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.
Fire warning
Mechanical processing of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Respect the power
Use magnets consciously. Their huge power can shock even experienced users. Be vigilant and respect their force.
Pinching danger
Big blocks can crush fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.
