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

MW 20x5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010044

GTIN/EAN: 5906301810438

5.00
Load capacity 6.93 kg / 67.95 N Magnetic Induction 277.16 mT / 2772 Gs
Diameter Ø
20 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
11.78 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see technical specifications »

4.52 zł net / pcs

5.56 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
4.52 zł
5.56 zł
price from 150 pcs
4.25 zł
5.23 zł
price from 600 pcs
3.98 zł
4.89 zł

Frequently asked questions

What is the maximum working temperature of a disc magnet?
Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.
What is the difference between N38, N42 and N52?
The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.
What is the dimensional tolerance?
±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

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 parameters of the product - MW 20x5 / N38 - cylindrical magnet

Specification / characteristics - MW 20x5 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010044
GTIN/EAN 5906301810438
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 20 mm [±0,1 mm]
Height 5 mm [±0,1 mm]
Weight 11.78 g
Magnetization Direction ↑ axial
Load capacity ~ ? 6.93 kg / 67.95 N
Magnetic Induction ~ ? 277.16 mT / 2772 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x5 / N38 - cylindrical 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

Engineering simulation of the magnet - report

Presented data are the result of a physical analysis. Results are based on algorithms for the material Nd2Fe14B. Real-world parameters may differ from theoretical values. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (force vs distance) - characteristics
MW 20x5 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2771 Gs
277.1 mT
 6.93 kg / 15.28 LBS
6930.0 g / 68.0 N
 strong
1 mm 2573 Gs
257.3 mT
 5.97 kg / 13.17 LBS
5975.0 g / 58.6 N
 strong
2 mm 2340 Gs
234.0 mT
 4.94 kg / 10.89 LBS
4940.1 g / 48.5 N
 strong
3 mm 2092 Gs
209.2 mT
 3.95 kg / 8.70 LBS
3948.3 g / 38.7 N
 strong
5 mm 1611 Gs
161.1 mT
 2.34 kg / 5.17 LBS
2343.4 g / 23.0 N
 strong
10 mm 775 Gs
77.5 mT
 0.54 kg / 1.19 LBS
541.6 g / 5.3 N
 safe
15 mm 387 Gs
38.7 mT
 0.13 kg / 0.30 LBS
135.0 g / 1.3 N
 safe
20 mm 211 Gs
21.1 mT
 0.04 kg / 0.09 LBS
40.2 g / 0.4 N
 safe
30 mm 80 Gs
8.0 mT
 0.01 kg / 0.01 LBS
5.7 g / 0.1 N
 safe
50 mm 20 Gs
2.0 mT
 0.00 kg / 0.00 LBS
0.4 g / 0.0 N
 safe
Magnetic force drops drastically with every subsequent millimeter of distance. Note that even a microscopic distance (e.g., contamination, varnish, veneer) strongly diminishes the holding power. Magnets work strongest in perfect adhesion; air break nullifies the force. Observe how flashily the pull force drop, when the product does not touch directly to the metal substrate. When designing the assembly, discard redundant distances.

Table 2: Shear load (vertical surface)
MW 20x5 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.39 kg / 3.06 LBS
1386.0 g / 13.6 N
1 mm Stal (~0.2) 1.19 kg / 2.63 LBS
1194.0 g / 11.7 N
2 mm Stal (~0.2) 0.99 kg / 2.18 LBS
988.0 g / 9.7 N
3 mm Stal (~0.2) 0.79 kg / 1.74 LBS
790.0 g / 7.7 N
5 mm Stal (~0.2) 0.47 kg / 1.03 LBS
468.0 g / 4.6 N
10 mm Stal (~0.2) 0.11 kg / 0.24 LBS
108.0 g / 1.1 N
15 mm Stal (~0.2) 0.03 kg / 0.06 LBS
26.0 g / 0.3 N
20 mm Stal (~0.2) 0.01 kg / 0.02 LBS
8.0 g / 0.1 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
This section defines the approximate force required to initiate the shifting of the magnet vertically against a vertical steel wall (considering typical friction coefficient). The holding force is relative to the separation distance between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 20x5 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.08 kg / 4.58 LBS
2079.0 g / 20.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.39 kg / 3.06 LBS
1386.0 g / 13.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.69 kg / 1.53 LBS
693.0 g / 6.8 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.47 kg / 7.64 LBS
3465.0 g / 34.0 N
When placing a holder on a vertical surface (e.g., a car body), it you can count on just about 20%-30% of nominal attraction strength. Gravity and a weak degree of grip influence the fact that magnets slide down faster than they pull off. Designing a vertical fastening? Remember that the shear force is much weaker than the maximum static pull force. On a painted metal, the element will slip down under a much lighter weight. Application of an anti-slip coating can drastically raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 20x5 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.69 kg / 1.53 LBS
693.0 g / 6.8 N
1 mm
25%
 1.73 kg / 3.82 LBS
1732.5 g / 17.0 N
2 mm
50%
 3.47 kg / 7.64 LBS
3465.0 g / 34.0 N
3 mm
75%
 5.20 kg / 11.46 LBS
5197.5 g / 51.0 N
5 mm
100%
 6.93 kg / 15.28 LBS
6930.0 g / 68.0 N
10 mm
100%
 6.93 kg / 15.28 LBS
6930.0 g / 68.0 N
11 mm
100%
 6.93 kg / 15.28 LBS
6930.0 g / 68.0 N
12 mm
100%
 6.93 kg / 15.28 LBS
6930.0 g / 68.0 N
A thin sheet cannot take in the full magnetic flux, which weakens actual performance of the holder. If you mount a strong magnet to a weak sheet, the magnetism will pass right through and the pull force will drop sharply. To achieve full efficiency of this neodymium's potential, you require a sufficiently solid backing of metal. The saturation phenomenon causes that on delicate walls (e.g., car bodies), the product works worse. We advise picking the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - resistance threshold
MW 20x5 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 6.93 kg / 15.28 LBS
6930.0 g / 68.0 N
 OK
40 °C -2.2% 6.78 kg / 14.94 LBS
6777.5 g / 66.5 N
 OK
60 °C -4.4% 6.63 kg / 14.61 LBS
6625.1 g / 65.0 N
80 °C -6.6% 6.47 kg / 14.27 LBS
6472.6 g / 63.5 N
100 °C -28.8% 4.93 kg / 10.88 LBS
4934.2 g / 48.4 N
Classic neodymiums irreversibly lose parameters above the temperature limit. Avoid high temperatures – excessive heat can irreversibly damage this product. With increasing heat, the magnet's power temporarily decreases. Do not use this product in hot environments higher than its safe range. Too high temperature will cause irreversible degradation of magnetic properties.
*Engineering note: Temperature resistance is determined by both grade, but also on the magnet's shape. Flat magnets (pancake types) are more susceptible to demagnetization under lower heat stress than long magnets. Warning indicator in the table points to a risk of irreversible loss for this particular item.

Table 6: Two magnets (repulsion) - field range
MW 20x5 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 14.87 kg / 32.79 LBS
4 380 Gs
2.23 kg / 4.92 LBS
2231 g / 21.9 N
 N/A
1 mm 13.89 kg / 30.63 LBS
5 357 Gs
2.08 kg / 4.59 LBS
2084 g / 20.4 N
 12.50 kg / 27.57 LBS
~0 Gs
2 mm 12.82 kg / 28.27 LBS
5 146 Gs
1.92 kg / 4.24 LBS
1923 g / 18.9 N
 11.54 kg / 25.44 LBS
~0 Gs
3 mm 11.71 kg / 25.82 LBS
4 918 Gs
1.76 kg / 3.87 LBS
1757 g / 17.2 N
 10.54 kg / 23.24 LBS
~0 Gs
5 mm 9.51 kg / 20.97 LBS
4 433 Gs
1.43 kg / 3.15 LBS
1427 g / 14.0 N
 8.56 kg / 18.88 LBS
~0 Gs
10 mm 5.03 kg / 11.09 LBS
3 223 Gs
0.75 kg / 1.66 LBS
754 g / 7.4 N
 4.53 kg / 9.98 LBS
~0 Gs
20 mm 1.16 kg / 2.56 LBS
1 549 Gs
0.17 kg / 0.38 LBS
174 g / 1.7 N
 1.05 kg / 2.31 LBS
~0 Gs
50 mm 0.03 kg / 0.07 LBS
251 Gs
0.00 kg / 0.01 LBS
5 g / 0.0 N
 0.03 kg / 0.06 LBS
~0 Gs
60 mm 0.01 kg / 0.03 LBS
159 Gs
0.00 kg / 0.00 LBS
2 g / 0.0 N
 0.01 kg / 0.02 LBS
~0 Gs
70 mm 0.01 kg / 0.01 LBS
107 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
80 mm 0.00 kg / 0.01 LBS
75 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
54 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
41 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
Two magnets interact from a wider radius than a magnet and steel combination. Such a system of two magnets produces a massive flux and a wider radius of performance. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when connecting a pair of magnets, the collision energy is massive. The levitation is slightly lower than the connection force, but still impressive.
*The magnetic induction in repulsion mode drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
Attention: Results show shear force of two matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Hazards (implants) - warnings
MW 20x5 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.5 cm
Hearing aid 10 Gs (1.0 mT) 6.5 cm
Timepiece 20 Gs (2.0 mT) 5.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 4.0 cm
Car key 50 Gs (5.0 mT) 4.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm
Powerful magnet radiation poses a real danger to electronics as well as pacemakers. These neodymiums generate a flux that destroys function of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and plastic. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MW 20x5 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.91 km/h
(6.92 m/s)
 0.28 J
30 mm 25.76 km/h
(7.16 m/s)
 0.30 J
50 mm 25.78 km/h
(7.16 m/s)
 0.30 J
100 mm 25.78 km/h
(7.16 m/s)
 0.30 J
Magnetic elements are delicate – a strong collision with metal risks their cracking. Pay attention to connection velocity – a neodymium left loose speeds with massive force. Kinetic force can trigger coating fragments or dangerous crushing to fingers. Hold the magnet firmly during mounting so it doesn't hit with great force against the metal. A collision at high speed almost guarantees destruction of the magnet. Wear eye protection when playing with large magnets.

Table 9: Coating parameters (durability)
MW 20x5 / 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 following table defines the conditions under which this product can be safely used. Note the thickness of the protective layer.

Table 10: Construction data (Flux)
MW 20x5 / N38

Parameter Value SI Unit / Description
Magnetic Flux 9 675 Mx 96.7 µWb
Pc Coefficient 0.35 Low (Flat)
Flux value emitted by the magnet pole. Key data when building generators as well as sensors. The Pc coefficient defines the working geometry.

Table 11: Underwater work (magnet fishing)
MW 20x5 / N38

Environment Effective steel pull Effect
Air (land) 6.93 kg Standard
Water (riverbed) 7.93 kg
(+1.00 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Contrary to myths, water does not block the magnetic field. However, remember the water resistance when pulling the rope quickly.

1. Vertical hold

*Warning: On a vertical wall, the magnet retains just approx. 20-30% of its nominal pull.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) significantly reduces the holding force.

3. Power loss vs temp

*For N38 material, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.35

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.

Engineering data and GPSR

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%

Sustainability

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: 010044-2026
Measurement Calculator

Magnet pull force

Magnetic Induction

Insert a value in one of the inputs, and all other values change on the fly.

See more offers

AM klisza magnetyczna 50 x 50 mm - magnetic accessories
Product available Ships today (order by 14:00)

AM klisza magnetyczna 50 x 50 mm - magnetic accessories

24.60 zł brutto / pcs
HH 20x7.2 [M4] / N38 - through hole magnetic holder
Product available Ships today (order by 14:00)

HH 20x7.2 [M4] / N38 - through hole magnetic holder

6.40 zł brutto / pcs
ZK XLINK 1026 elementów - construction toy
Product available Ships today (order by 14:00)

ZK XLINK 1026 elementów - construction toy

79.90 zł brutto / pcs
NCM 40x13.5x5 / N38 - channel magnetic holder
Product available Ships today (order by 14:00)

NCM 40x13.5x5 / N38 - channel magnetic holder

14.19 zł brutto / pcs
This product is an extremely powerful rod magnet, composed of durable NdFeB material, which, at dimensions of Ø20x5 mm, guarantees the highest energy density. This specific item features high dimensional repeatability and professional build quality, making it an excellent solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 6.93 kg), this product is available off-the-shelf from our European logistics center, ensuring rapid order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
It finds application in modeling, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 67.95 N with a weight of only 11.78 g, this rod is indispensable in electronics and wherever every gram matters.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure long-term durability in industry, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø20x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 20 mm and height 5 mm. The value of 67.95 N means that the magnet is capable of holding a weight many times exceeding its own mass of 11.78 g. The product has a [NiCuNi] coating, which protects the surface against oxidation, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 20 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They have constant strength, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They show high resistance to demagnetization induced by external field influence,
  • By covering with a decorative layer of nickel, the element acquires an proper look,
  • Magnets possess maximum magnetic induction on the active area,
  • Neodymium magnets are characterized by very 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 versatility in constructing and the ability to adapt to unusual requirements,
  • Significant place in high-tech industry – they are commonly used in magnetic memories, electric motors, advanced medical instruments, and technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Limitations

Disadvantages of NdFeB magnets:
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets decrease their force 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 rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We suggest cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Health risk related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets is a challenge,

Holding force characteristics

Best holding force of the magnet in ideal parameters – what it depends on?

The force parameter is a theoretical maximum value executed under the following configuration:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • whose thickness reaches at least 10 mm
  • with a surface cleaned and smooth
  • with direct contact (without impurities)
  • under axial force vector (90-degree angle)
  • in temp. approx. 20°C

Practical aspects of lifting capacity – factors

Please note that the magnet holding may be lower depending on the following factors, in order of importance:
  • Distance (betwixt the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (typically 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.
  • Plate material – low-carbon steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
  • Surface finish – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Fire warning

Powder generated during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Magnetic media

Device Safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Handling guide

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Do not overheat magnets

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. Damage is permanent.

Crushing force

Big blocks can break fingers instantly. Never put your hand betwixt two attracting surfaces.

Magnetic interference

Navigation devices and smartphones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Do not give to children

Neodymium magnets are not intended for children. Eating a few magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires urgent medical intervention.

Avoid contact if allergic

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, prevent direct skin contact and choose encased magnets.

ICD Warning

Warning for patients: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Fragile material

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Security! Want to know more? Check our post: Are neodymium magnets dangerous?