MPL 50x50x10 / N38 - lamellar magnet
lamellar magnet
Catalog no 020167
GTIN/EAN: 5906301811732
length
50 mm [±0,1 mm]
Width
50 mm [±0,1 mm]
Height
10 mm [±0,1 mm]
Weight
187.5 g
Magnetization Direction
↑ axial
Load capacity
33.73 kg / 330.92 N
Magnetic Induction
209.75 mT / 2097 Gs
Coating
[NiCuNi] Nickel
42.88 ZŁ with VAT / pcs + price for transport
34.86 ZŁ net + 23% VAT / pcs
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Technical - MPL 50x50x10 / N38 - lamellar magnet
Specification / characteristics - MPL 50x50x10 / N38 - lamellar magnet
| properties | values |
|---|---|
| Cat. no. | 020167 |
| GTIN/EAN | 5906301811732 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 50 mm [±0,1 mm] |
| Width | 50 mm [±0,1 mm] |
| Height | 10 mm [±0,1 mm] |
| Weight | 187.5 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 33.73 kg / 330.92 N |
| Magnetic Induction ~ ? | 209.75 mT / 2097 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 product - data
Presented information represent the outcome of a mathematical calculation. Results were calculated on algorithms for the material Nd2Fe14B. Operational parameters may differ. Please consider these calculations as a preliminary roadmap when designing systems.
Table 1: Static pull force (pull vs gap) - power drop
MPL 50x50x10 / N38
| Distance (mm) | Induction (Gauss) / mT | Pull Force (kg) | Risk Status |
|---|---|---|---|
| 0 mm |
2097 Gs
209.7 mT
|
33.73 kg / 33730.0 g
330.9 N
|
crushing |
| 1 mm |
2056 Gs
205.6 mT
|
32.43 kg / 32430.0 g
318.1 N
|
crushing |
| 2 mm |
2009 Gs
200.9 mT
|
30.96 kg / 30964.6 g
303.8 N
|
crushing |
| 3 mm |
1957 Gs
195.7 mT
|
29.38 kg / 29380.4 g
288.2 N
|
crushing |
| 5 mm |
1841 Gs
184.1 mT
|
25.99 kg / 25992.3 g
255.0 N
|
crushing |
| 10 mm |
1514 Gs
151.4 mT
|
17.58 kg / 17577.6 g
172.4 N
|
crushing |
| 15 mm |
1194 Gs
119.4 mT
|
10.93 kg / 10931.8 g
107.2 N
|
crushing |
| 20 mm |
922 Gs
92.2 mT
|
6.51 kg / 6512.2 g
63.9 N
|
medium risk |
| 30 mm |
543 Gs
54.3 mT
|
2.26 kg / 2260.0 g
22.2 N
|
medium risk |
| 50 mm |
209 Gs
20.9 mT
|
0.33 kg / 334.1 g
3.3 N
|
safe |
Table 2: Shear force (vertical surface)
MPL 50x50x10 / N38
| Distance (mm) | Friction coefficient | Pull Force (kg) |
|---|---|---|
| 0 mm | Stal (~0.2) |
6.75 kg / 6746.0 g
66.2 N
|
| 1 mm | Stal (~0.2) |
6.49 kg / 6486.0 g
63.6 N
|
| 2 mm | Stal (~0.2) |
6.19 kg / 6192.0 g
60.7 N
|
| 3 mm | Stal (~0.2) |
5.88 kg / 5876.0 g
57.6 N
|
| 5 mm | Stal (~0.2) |
5.20 kg / 5198.0 g
51.0 N
|
| 10 mm | Stal (~0.2) |
3.52 kg / 3516.0 g
34.5 N
|
| 15 mm | Stal (~0.2) |
2.19 kg / 2186.0 g
21.4 N
|
| 20 mm | Stal (~0.2) |
1.30 kg / 1302.0 g
12.8 N
|
| 30 mm | Stal (~0.2) |
0.45 kg / 452.0 g
4.4 N
|
| 50 mm | Stal (~0.2) |
0.07 kg / 66.0 g
0.6 N
|
Table 3: Wall mounting (sliding) - vertical pull
MPL 50x50x10 / N38
| Surface type | Friction coefficient / % Mocy | Max load (kg) |
|---|---|---|
| Raw steel |
µ = 0.3
30% Nominalnej Siły
|
10.12 kg / 10119.0 g
99.3 N
|
| Painted steel (standard) |
µ = 0.2
20% Nominalnej Siły
|
6.75 kg / 6746.0 g
66.2 N
|
| Oily/slippery steel |
µ = 0.1
10% Nominalnej Siły
|
3.37 kg / 3373.0 g
33.1 N
|
| Magnet with anti-slip rubber |
µ = 0.5
50% Nominalnej Siły
|
16.87 kg / 16865.0 g
165.4 N
|
Table 4: Material efficiency (substrate influence) - power losses
MPL 50x50x10 / N38
| Steel thickness (mm) | % power | Real pull force (kg) |
|---|---|---|
| 0.5 mm |
|
1.69 kg / 1686.5 g
16.5 N
|
| 1 mm |
|
4.22 kg / 4216.3 g
41.4 N
|
| 2 mm |
|
8.43 kg / 8432.5 g
82.7 N
|
| 5 mm |
|
21.08 kg / 21081.2 g
206.8 N
|
| 10 mm |
|
33.73 kg / 33730.0 g
330.9 N
|
Table 5: Working in heat (material behavior) - power drop
MPL 50x50x10 / N38
| Ambient temp. (°C) | Power loss | Remaining pull | Status |
|---|---|---|---|
| 20 °C | 0.0% |
33.73 kg / 33730.0 g
330.9 N
|
OK |
| 40 °C | -2.2% |
32.99 kg / 32987.9 g
323.6 N
|
OK |
| 60 °C | -4.4% |
32.25 kg / 32245.9 g
316.3 N
|
|
| 80 °C | -6.6% |
31.50 kg / 31503.8 g
309.1 N
|
|
| 100 °C | -28.8% |
24.02 kg / 24015.8 g
235.6 N
|
Table 6: Magnet-Magnet interaction (attraction) - field collision
MPL 50x50x10 / N38
| Gap (mm) | Attraction (kg) (N-S) | Repulsion (kg) (N-N) |
|---|---|---|
| 0 mm |
67.80 kg / 67795 g
665.1 N
3 611 Gs
|
N/A |
| 1 mm |
66.54 kg / 66544 g
652.8 N
4 156 Gs
|
59.89 kg / 59889 g
587.5 N
~0 Gs
|
| 2 mm |
65.18 kg / 65182 g
639.4 N
4 113 Gs
|
58.66 kg / 58664 g
575.5 N
~0 Gs
|
| 3 mm |
63.74 kg / 63744 g
625.3 N
4 067 Gs
|
57.37 kg / 57369 g
562.8 N
~0 Gs
|
| 5 mm |
60.67 kg / 60670 g
595.2 N
3 968 Gs
|
54.60 kg / 54603 g
535.7 N
~0 Gs
|
| 10 mm |
52.24 kg / 52243 g
512.5 N
3 682 Gs
|
47.02 kg / 47019 g
461.3 N
~0 Gs
|
| 20 mm |
35.33 kg / 35330 g
346.6 N
3 028 Gs
|
31.80 kg / 31797 g
311.9 N
~0 Gs
|
| 50 mm |
7.69 kg / 7692 g
75.5 N
1 413 Gs
|
6.92 kg / 6923 g
67.9 N
~0 Gs
|
Table 7: Hazards (implants) - warnings
MPL 50x50x10 / N38
| Object / Device | Limit (Gauss) / mT | Safe distance |
|---|---|---|
| Pacemaker | 5 Gs (0.5 mT) | 21.0 cm |
| Hearing aid | 10 Gs (1.0 mT) | 16.5 cm |
| Timepiece | 20 Gs (2.0 mT) | 13.0 cm |
| Mobile device | 40 Gs (4.0 mT) | 10.0 cm |
| Remote | 50 Gs (5.0 mT) | 9.5 cm |
| Payment card | 400 Gs (40.0 mT) | 4.0 cm |
| HDD hard drive | 600 Gs (60.0 mT) | 3.0 cm |
Table 8: Collisions (cracking risk) - warning
MPL 50x50x10 / N38
| Start from (mm) | Speed (km/h) | Energy (J) | Predicted outcome |
|---|---|---|---|
| 10 mm |
17.38 km/h
(4.83 m/s)
|
2.19 J | |
| 30 mm |
24.39 km/h
(6.78 m/s)
|
4.30 J | |
| 50 mm |
30.43 km/h
(8.45 m/s)
|
6.70 J | |
| 100 mm |
42.78 km/h
(11.88 m/s)
|
13.24 J |
Table 9: Corrosion resistance
MPL 50x50x10 / 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)
MPL 50x50x10 / N38
| Parameter | Value | SI Unit / Description |
|---|---|---|
| Magnetic Flux | 61 501 Mx | 615.0 µWb |
| Pc Coefficient | 0.26 | Low (Flat) |
Table 11: Hydrostatics and buoyancy
MPL 50x50x10 / N38
| Environment | Effective steel pull | Effect |
|---|---|---|
| Air (land) | 33.73 kg | Standard |
| Water (riverbed) |
38.62 kg
(+4.89 kg Buoyancy gain)
|
+14.5% |
1. Shear force
*Caution: On a vertical surface, the magnet holds merely ~20% of its nominal pull.
2. Efficiency vs thickness
*Thin steel (e.g. computer case) severely weakens the holding force.
3. Thermal stability
*For standard magnets, the critical limit is 80°C.
4. Demagnetization curve and operating point (B-H)
chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.26
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.
Chemical composition
| 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Advantages as well as disadvantages of rare earth magnets.
Advantages
- They do not lose power, even after approximately 10 years – the reduction in lifting capacity is only ~1% (according to tests),
- Neodymium magnets remain highly resistant to demagnetization caused by external interference,
- In other words, due to the smooth surface of silver, the element becomes visually attractive,
- The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
- Possibility of precise machining and optimizing to individual conditions,
- Huge importance in future technologies – they serve a role in hard drives, electromotive mechanisms, diagnostic systems, also multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. 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 corrode. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in producing threads and complicated forms in magnets, we propose using a housing - magnetic mount.
- Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Maximum lifting capacity of the magnet – what it depends on?
- on a block made of mild steel, perfectly concentrating the magnetic field
- possessing a massiveness of at least 10 mm to ensure full flux closure
- characterized by smoothness
- under conditions of no distance (surface-to-surface)
- during detachment in a direction vertical to the plane
- at ambient temperature room level
Practical lifting capacity: influencing factors
- Distance (betwixt the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to paint, corrosion or dirt).
- Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Base massiveness – insufficiently thick plate does not close the flux, causing part of the power to be wasted into the air.
- Plate material – low-carbon steel gives the best results. Alloy steels lower magnetic permeability and lifting capacity.
- Surface finish – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Thermal factor – high temperature weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. Additionally, even a small distance between the magnet and the plate lowers the load capacity.
Precautions when working with NdFeB magnets
Phone sensors
Note: neodymium magnets produce a field that interferes with precision electronics. Maintain a separation from your mobile, tablet, and GPS.
Do not overheat magnets
Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Safe operation
Be careful. Rare earth magnets act from a long distance and connect with huge force, often quicker than you can react.
Threat to electronics
Intense magnetic fields can destroy records on credit cards, HDDs, and storage devices. Stay away of min. 10 cm.
No play value
Always store magnets out of reach of children. Choking hazard is high, and the effects of magnets clamping inside the body are tragic.
Mechanical processing
Drilling and cutting of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Magnets are brittle
Beware of splinters. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.
Warning for heart patients
Warning for patients: Powerful magnets affect medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.
Serious injuries
Mind your fingers. Two powerful magnets will snap together instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!
Metal Allergy
Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for encased magnets.
