← previous
next →
Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

MPL 50x50x10 / N38 - lamellar magnet

lamellar magnet

Catalog no 020167

GTIN/EAN: 5906301811732

5.00
Load capacity 33.73 kg / 330.92 N Magnetic Induction 209.75 mT / 2097 Gs
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
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product details »

34.86 zł net / pcs

42.88 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
34.86 zł
42.88 zł
price from 20 pcs
32.77 zł
40.31 zł
price from 80 pcs
30.68 zł
37.73 zł

Frequently asked questions

How much will a block magnet really hold?
The catalogue force is measured in full contact with smooth steel at least 10 mm thick, pulled perpendicular, at about 20 °C. On 1 mm sheet about 50% of that value remains, on 0.5 mm about 25%. Mounted on a vertical wall the realistic figure is 20–30%, because the load is then in shear rather than in tension.
What is the maximum working temperature?
Standard N-series grades up to 80 °C, and N50, N52 and N54 up to 60 °C. Above the maximum working temperature the loss stops being reversible. The Curie temperature, at which magnetic properties are lost completely, is about 310 °C.
What safety factor should I allow?
At least twice the mass of the item, and three to five times for vertical mounting. The margin covers sheet thickness, surface condition, any layer of paint or rust, and vibration.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator
Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Technical - MPL 50x50x10 / N38 - lamellar magnet

Specification / characteristics - MPL 50x50x10 / N38 - lamellar magnet

properties
properties values
Cat. no. 020167
GTIN/EAN 5906301811732
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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

Specification / characteristics MPL 50x50x10 / N38 - lamellar magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°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 310 °C
Curie Temperature TF 590 °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 analysis of the magnet - technical parameters

These values are the direct effect of a engineering analysis. Values rely on algorithms for the material Nd2Fe14B. Real-world performance might slightly deviate from the simulation results. Please consider these calculations as a supplementary guide during assembly planning.

Table 1: Static pull force (force vs gap) - characteristics
MPL 50x50x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2097 Gs
209.7 mT
 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
 dangerous!
1 mm 2056 Gs
205.6 mT
 32.43 kg / 71.50 pounds
32430.0 g / 318.1 N
 dangerous!
2 mm 2009 Gs
200.9 mT
 30.96 kg / 68.27 pounds
30964.6 g / 303.8 N
 dangerous!
3 mm 1957 Gs
195.7 mT
 29.38 kg / 64.77 pounds
29380.4 g / 288.2 N
 dangerous!
5 mm 1841 Gs
184.1 mT
 25.99 kg / 57.30 pounds
25992.3 g / 255.0 N
 dangerous!
10 mm 1514 Gs
151.4 mT
 17.58 kg / 38.75 pounds
17577.6 g / 172.4 N
 dangerous!
15 mm 1194 Gs
119.4 mT
 10.93 kg / 24.10 pounds
10931.8 g / 107.2 N
 dangerous!
20 mm 922 Gs
92.2 mT
 6.51 kg / 14.36 pounds
6512.2 g / 63.9 N
 medium risk
30 mm 543 Gs
54.3 mT
 2.26 kg / 4.98 pounds
2260.0 g / 22.2 N
 medium risk
50 mm 209 Gs
20.9 mT
 0.33 kg / 0.74 pounds
334.1 g / 3.3 N
 low risk
Magnetic force weakens sharply with every mm of gap. Remember that even a microscopic distance (e.g., dirt, paint, dust) strongly reduces the pull force. Magnetic products operate optimally during direct contact; gap nullifies the force. See how flashily the pull force plummet, when the magnet does not touch flatly to the metal substrate. When calculating the mounting, discard unnecessary gaps.

Table 2: Slippage load (wall)
MPL 50x50x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 6.75 kg / 14.87 pounds
6746.0 g / 66.2 N
1 mm Stal (~0.2) 6.49 kg / 14.30 pounds
6486.0 g / 63.6 N
2 mm Stal (~0.2) 6.19 kg / 13.65 pounds
6192.0 g / 60.7 N
3 mm Stal (~0.2) 5.88 kg / 12.95 pounds
5876.0 g / 57.6 N
5 mm Stal (~0.2) 5.20 kg / 11.46 pounds
5198.0 g / 51.0 N
10 mm Stal (~0.2) 3.52 kg / 7.75 pounds
3516.0 g / 34.5 N
15 mm Stal (~0.2) 2.19 kg / 4.82 pounds
2186.0 g / 21.4 N
20 mm Stal (~0.2) 1.30 kg / 2.87 pounds
1302.0 g / 12.8 N
30 mm Stal (~0.2) 0.45 kg / 1.00 pounds
452.0 g / 4.4 N
50 mm Stal (~0.2) 0.07 kg / 0.15 pounds
66.0 g / 0.6 N
The table below calculates the theoretical shear load required to initiate the shifting of the magnet down along a vertical steel wall (assuming typical friction). This value varies with the distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MPL 50x50x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
10.12 kg / 22.31 pounds
10119.0 g / 99.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
6.75 kg / 14.87 pounds
6746.0 g / 66.2 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
3.37 kg / 7.44 pounds
3373.0 g / 33.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
16.87 kg / 37.18 pounds
16865.0 g / 165.4 N
When hanging a magnet on a vertical plane (e.g., a fridge), it will only hold barely about 20%-30% of nominal attraction strength. Gravitational force as well as a weak degree of grip influence the fact that holders slide down faster than they pop off the substrate. Designing a hanger? Remember that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the holder will give way down under a significantly smaller cargo. Using a rubber coating can drastically improve the result.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MPL 50x50x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
5%
 1.69 kg / 3.72 pounds
1686.5 g / 16.5 N
1 mm
13%
 4.22 kg / 9.30 pounds
4216.3 g / 41.4 N
2 mm
25%
 8.43 kg / 18.59 pounds
8432.5 g / 82.7 N
3 mm
38%
 12.65 kg / 27.89 pounds
12648.8 g / 124.1 N
5 mm
63%
 21.08 kg / 46.48 pounds
21081.2 g / 206.8 N
10 mm
100%
 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
11 mm
100%
 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
12 mm
100%
 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
A thin metal plate is incapable of focus the full magnetic flux, which weakens actual performance of the holder. If you install a neodymium to a too thin substrate, the field will pass right through and the attraction force will be weaker. To achieve full efficiency of this neodymium's power, you need a suitably thick element of steel. The material oversaturation causes that on thin elements (e.g., appliance housings), the holder holds weaker. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal stability (stability) - thermal limit
MPL 50x50x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 33.73 kg / 74.36 pounds
33730.0 g / 330.9 N
 OK
40 °C -2.2% 32.99 kg / 72.73 pounds
32987.9 g / 323.6 N
 OK
60 °C -4.4% 32.25 kg / 71.09 pounds
32245.9 g / 316.3 N
80 °C -6.6% 31.50 kg / 69.45 pounds
31503.8 g / 309.1 N
100 °C -28.8% 24.02 kg / 52.95 pounds
24015.8 g / 235.6 N
Standard neodymium magnets lose strength past the thermal threshold. Protect against heat – high temperature can irreversibly destroy this magnet. With every degree above norm, the neodymium's force temporarily drops. Refrain from using this magnet close to ovens higher than its safe range. Exceeding the critical threshold will cause irreversible degradation of magnetism.
*Technical advisory: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) risk losing magnetic properties under lower heat stress than long magnets. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - forces in the system
MPL 50x50x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Strength (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 67.80 kg / 149.46 pounds
3 611 Gs
10.17 kg / 22.42 pounds
10169 g / 99.8 N
 N/A
1 mm 66.54 kg / 146.70 pounds
4 156 Gs
9.98 kg / 22.01 pounds
9982 g / 97.9 N
 59.89 kg / 132.03 pounds
~0 Gs
2 mm 65.18 kg / 143.70 pounds
4 113 Gs
9.78 kg / 21.56 pounds
9777 g / 95.9 N
 58.66 kg / 129.33 pounds
~0 Gs
3 mm 63.74 kg / 140.53 pounds
4 067 Gs
9.56 kg / 21.08 pounds
9562 g / 93.8 N
 57.37 kg / 126.48 pounds
~0 Gs
5 mm 60.67 kg / 133.75 pounds
3 968 Gs
9.10 kg / 20.06 pounds
9101 g / 89.3 N
 54.60 kg / 120.38 pounds
~0 Gs
10 mm 52.24 kg / 115.18 pounds
3 682 Gs
7.84 kg / 17.28 pounds
7836 g / 76.9 N
 47.02 kg / 103.66 pounds
~0 Gs
20 mm 35.33 kg / 77.89 pounds
3 028 Gs
5.30 kg / 11.68 pounds
5299 g / 52.0 N
 31.80 kg / 70.10 pounds
~0 Gs
50 mm 7.69 kg / 16.96 pounds
1 413 Gs
1.15 kg / 2.54 pounds
1154 g / 11.3 N
 6.92 kg / 15.26 pounds
~0 Gs
60 mm 4.54 kg / 10.01 pounds
1 086 Gs
0.68 kg / 1.50 pounds
681 g / 6.7 N
 4.09 kg / 9.01 pounds
~0 Gs
70 mm 2.72 kg / 6.01 pounds
841 Gs
0.41 kg / 0.90 pounds
409 g / 4.0 N
 2.45 kg / 5.41 pounds
~0 Gs
80 mm 1.67 kg / 3.68 pounds
658 Gs
0.25 kg / 0.55 pounds
250 g / 2.5 N
 1.50 kg / 3.31 pounds
~0 Gs
90 mm 1.05 kg / 2.31 pounds
521 Gs
0.16 kg / 0.35 pounds
157 g / 1.5 N
 0.94 kg / 2.08 pounds
~0 Gs
100 mm 0.67 kg / 1.48 pounds
417 Gs
0.10 kg / 0.22 pounds
101 g / 1.0 N
 0.60 kg / 1.33 pounds
~0 Gs
Two magnetic products attract each other from a much further distance than a magnet and steel combination. Such a system of magnet-to-magnet generates a stronger field and a wider radius of performance. Designing a strong closure? Use a pair of magnets instead of one magnet and a steel. Exercise caution that when connecting a pair of magnets, the impact force is massive. The repulsion force is slightly lower than the attraction, but still large.
*Field value between like poles is approximately ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).
Note: Estimates apply to sliding force of two same neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Protective zones (electronics) - precautionary measures
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
Mechanical watch 20 Gs (2.0 mT) 13.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 10.0 cm
Car key 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
Powerful magnet radiation is a real danger to electronic devices and pacemakers. These magnets generate a flux that destroys function of digital equipment. Notice: the invisible magnetic field penetrates the body and housings. Increased vigilance must be exercised by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
MPL 50x50x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.75 km/h
(5.21 m/s)
 2.54 J
30 mm 23.65 km/h
(6.57 m/s)
 4.05 J
50 mm 24.20 km/h
(6.72 m/s)
 4.24 J
100 mm 24.32 km/h
(6.76 m/s)
 4.28 J
NdFeB products are prone to chipping – a strong collision with metal causes immediate chipping. Watch the impact speed – a neodymium left loose turns into a projectile. Kinetic force can cause material chips or painful pinches to skin. Hold the magnet firmly during mounting so it doesn't hit violently against the metal. A collision at high speed almost guarantees destruction of the neodymium. Wear eye protection when handling with powerful specimens.

Table 9: Coating parameters (durability)
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)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (Pc)
MPL 50x50x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 61 501 Mx 615.0 µWb
Pc Coefficient 0.26 Low (Flat)
Total magnetic flux emitted by the magnet pole. Essential parameter in coil applications and motors. Pc value defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
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%
Rust risk: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
In water, the magnet feels stronger thanks to Archimedes' principle. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

*Note: On a vertical wall, the magnet retains only ~20% of its max power.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) significantly weakens the holding force.

3. Thermal stability

*For N38 material, 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

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.

Technical and environmental data

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%

Environmental data

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 020167-2026
Magnet Unit Converter

Force (pull)

Field Strength

Just populate any input, to let the converter fill in the rest for you.

See more deals

SM 25x250 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x250 [2xM8] / N52 - magnetic separator

762.60 zł brutto / pcs
MW 8x5 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 8x5 / N38 - cylindrical magnet

0.836 zł brutto / pcs
SM 32x475 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x475 [2xM8] / N52 - magnetic separator

1488.30 zł brutto / pcs
MPL 40x40x15 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 40x40x15 / N38 - lamellar magnet

55.37 zł brutto / pcs
This product is a very powerful plate magnet made of NdFeB material, which, with dimensions of 50x50x10 mm and a weight of 187.5 g, guarantees premium class connection. As a magnetic bar with high power (approx. 33.73 kg), this product is available off-the-shelf from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is sliding the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. To separate the MPL 50x50x10 / N38 model, firmly slide one magnet over the edge of the other until the attraction force decreases. We recommend care, because after separation, the magnets may want to violently snap back together, which threatens pinching the skin. Using a screwdriver risks destroying the coating and permanently cracking the magnet.
Plate magnets MPL 50x50x10 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 33.73 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. Customers often choose this model for workshop organization on strips and for advanced DIY and modeling projects, where precision and power count.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. Double-sided tape cushions vibrations, which is an advantage when mounting in moving elements. Remember to clean and degrease the magnet surface before gluing, which significantly increases the adhesion of the glue to the nickel coating.
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. In practice, this means that this magnet has the greatest attraction force on its main planes (50x50 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 50 mm (length), 50 mm (width), and 10 mm (thickness). The key parameter here is the holding force amounting to approximately 33.73 kg (force ~330.92 N), which, with such a flat shape, proves the high grade of the material. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros and cons of Nd2Fe14B magnets.

Benefits

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • Their strength remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
  • They retain their magnetic properties even under external field action,
  • The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Magnetic induction on the working part of the magnet remains impressive,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
  • Considering the ability of free forming and adaptation to unique requirements, NdFeB magnets can be created in a wide range of geometric configurations, which makes them more universal,
  • Universal use in high-tech industry – they serve a role in magnetic memories, motor assemblies, precision medical tools, and multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of neodymium magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • Neodymium magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as 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
  • They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing threads and complex shapes in magnets, we recommend using a housing - magnetic mount.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

Detachment force of the magnet in optimal conditions – what affects it?

Information about lifting capacity was determined for the most favorable conditions, taking into account:
  • with the application of a yoke made of special test steel, ensuring full magnetic saturation
  • with a thickness no less than 10 mm
  • characterized by even structure
  • with direct contact (without paint)
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Please note that the magnet holding may be lower subject to the following factors, starting with the most relevant:
  • Gap (betwixt the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel grade – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
  • Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of neodymium magnets
Do not drill into magnets

Mechanical processing of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

No play value

Only for adults. Small elements can be swallowed, causing intestinal necrosis. Keep out of reach of kids and pets.

Precision electronics

Navigation devices and mobile phones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can ruin the sensors in your phone.

Electronic hazard

Powerful magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

Metal Allergy

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If you have an allergy, prevent touching magnets with bare hands or choose encased magnets.

Do not overheat magnets

Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Eye protection

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Impact of two magnets will cause them shattering into shards.

Crushing risk

Protect your hands. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Be careful!

Caution required

Be careful. Rare earth magnets attract from a distance and snap with huge force, often quicker than you can move away.

Warning for heart patients

Life threat: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Security! Learn more about risks in the article: Magnet Safety Guide.