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
bulk discounts:
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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 analysis of the magnet - report
Presented values represent the result of a physical analysis. Results are based on algorithms for the material Nd2Fe14B. Operational parameters may differ. Please consider these data as a reference point for designers.
Table 1: Static pull force (pull vs distance) - 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
|
safe |
| 1 mm |
3877 Gs
387.7 mT
|
0.18 kg / 0.39 pounds
178.6 g / 1.8 N
|
safe |
| 2 mm |
2308 Gs
230.8 mT
|
0.06 kg / 0.14 pounds
63.3 g / 0.6 N
|
safe |
| 3 mm |
1419 Gs
141.9 mT
|
0.02 kg / 0.05 pounds
23.9 g / 0.2 N
|
safe |
| 5 mm |
639 Gs
63.9 mT
|
0.00 kg / 0.01 pounds
4.8 g / 0.0 N
|
safe |
| 10 mm |
173 Gs
17.3 mT
|
0.00 kg / 0.00 pounds
0.4 g / 0.0 N
|
safe |
| 15 mm |
75 Gs
7.5 mT
|
0.00 kg / 0.00 pounds
0.1 g / 0.0 N
|
safe |
| 20 mm |
40 Gs
4.0 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 30 mm |
16 Gs
1.6 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
| 50 mm |
5 Gs
0.5 mT
|
0.00 kg / 0.00 pounds
0.0 g / 0.0 N
|
safe |
Table 2: Shear 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 (saturation) - 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: Working in heat (material behavior) - 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: Two magnets (repulsion) - forces in the system
MW 5x30 / N38
| Gap (mm) | Attraction (kg/lbs) (N-S) | Lateral 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: Hazards (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 |
| Phone / Smartphone | 40 Gs (4.0 mT) | 2.5 cm |
| Car key | 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: Coating parameters (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 (Flux)
MW 5x30 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 1 468 Mx | 14.7 µWb |
| Pc Coefficient | 1.59 | High (Stable) |
Table 11: Submerged application
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. Shear force
*Note: On a vertical surface, the magnet retains only ~20% of its perpendicular strength.
2. Efficiency vs thickness
*Thin steel (e.g. 0.5mm PC case) drastically weakens the holding force.
3. Temperature resistance
*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
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.
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 |
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Advantages and disadvantages of Nd2Fe14B magnets.
Advantages
- They retain full power for almost ten years – the loss is just ~1% (based on simulations),
- Magnets very well defend themselves against loss of magnetization caused by foreign field sources,
- A magnet with a metallic silver surface looks better,
- Magnetic induction on the surface of the magnet remains exceptional,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Thanks to flexibility in forming and the ability to customize to complex applications,
- Fundamental importance in modern technologies – they are utilized in data components, electromotive mechanisms, precision medical tools, also other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- We suggest a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complicated forms.
- Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these magnets can disrupt the diagnostic process medical when they are in the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Lifting parameters
Maximum holding power of the magnet – what contributes to it?
- using a sheet made of high-permeability steel, acting as a magnetic yoke
- whose thickness is min. 10 mm
- characterized by smoothness
- with total lack of distance (without paint)
- under axial force vector (90-degree angle)
- in stable room temperature
Impact of factors on magnetic holding capacity in practice
- Distance (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
- Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of maximum force).
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
- Steel type – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and lifting capacity.
- Plate texture – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
- Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.
Lifting capacity was measured using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.
Precautions when working with neodymium magnets
Magnet fragility
Neodymium magnets are ceramic materials, which means they are fragile like glass. Collision of two magnets leads to them shattering into small pieces.
Maximum temperature
Do not overheat. NdFeB magnets are sensitive to heat. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).
Magnetic media
Very strong magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Stay away of at least 10 cm.
Do not drill into magnets
Dust produced during grinding of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
GPS Danger
Remember: rare earth magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and navigation systems.
Safe operation
Use magnets with awareness. Their huge power can shock even professionals. Be vigilant and respect their force.
Danger to pacemakers
Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.
Keep away from children
Absolutely store magnets out of reach of children. Ingestion danger is high, and the effects of magnets connecting inside the body are life-threatening.
Hand protection
Pinching hazard: The pulling power is so great that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.
Sensitization to coating
Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness appears, immediately stop working with magnets and wear gloves.
