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

MW 22x6 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010047

GTIN/EAN: 5906301810469

5.00
Load capacity 9.33 kg / 91.51 N Magnetic Induction 296.78 mT / 2968 Gs
Diameter Ø
22 mm [±0,1 mm]
Height
6 mm [±0,1 mm]
Weight
17.11 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see parameters »

4.97 zł net / pcs

6.11 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
4.97 zł
6.11 zł
price from 150 pcs
4.67 zł
5.75 zł
price from 550 pcs
4.37 zł
5.38 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 specification of the product - MW 22x6 / N38 - cylindrical magnet

Specification / characteristics - MW 22x6 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010047
GTIN/EAN 5906301810469
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 22 mm [±0,1 mm]
Height 6 mm [±0,1 mm]
Weight 17.11 g
Magnetization Direction ↑ axial
Load capacity ~ ? 9.33 kg / 91.51 N
Magnetic Induction ~ ? 296.78 mT / 2968 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 22x6 / N38 - cylindrical magnet
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

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 product - report

The following data constitute the result of a mathematical analysis. Results were calculated on algorithms for the class Nd2Fe14B. Actual parameters may deviate from the simulation results. Use these calculations as a reference point when designing systems.

Table 1: Static force (force vs gap) - power drop
MW 22x6 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2967 Gs
296.7 mT
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
 warning
1 mm 2767 Gs
276.7 mT
 8.12 kg / 17.89 pounds
8116.0 g / 79.6 N
 warning
2 mm 2538 Gs
253.8 mT
 6.82 kg / 15.05 pounds
6824.4 g / 66.9 N
 warning
3 mm 2295 Gs
229.5 mT
 5.58 kg / 12.30 pounds
5580.8 g / 54.7 N
 warning
5 mm 1818 Gs
181.8 mT
 3.50 kg / 7.73 pounds
3504.7 g / 34.4 N
 warning
10 mm 938 Gs
93.8 mT
 0.93 kg / 2.06 pounds
933.4 g / 9.2 N
 safe
15 mm 492 Gs
49.2 mT
 0.26 kg / 0.57 pounds
257.0 g / 2.5 N
 safe
20 mm 277 Gs
27.7 mT
 0.08 kg / 0.18 pounds
81.6 g / 0.8 N
 safe
30 mm 108 Gs
10.8 mT
 0.01 kg / 0.03 pounds
12.4 g / 0.1 N
 safe
50 mm 29 Gs
2.9 mT
 0.00 kg / 0.00 pounds
0.9 g / 0.0 N
 safe
Grip strength decreases significantly with every subsequent millimeter of spacing. Keep in mind that even a microscopic distance (e.g., dirt, paint, rust) significantly reduces the pull force. Magnets operate strongest in perfect adhesion; distance weakens the force. Observe how quickly the load capacity fall, when the magnet does not adhere tightly to the metal substrate. When designing the mounting, avoid redundant distances.

Table 2: Sliding hold (wall)
MW 22x6 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.87 kg / 4.11 pounds
1866.0 g / 18.3 N
1 mm Stal (~0.2) 1.62 kg / 3.58 pounds
1624.0 g / 15.9 N
2 mm Stal (~0.2) 1.36 kg / 3.01 pounds
1364.0 g / 13.4 N
3 mm Stal (~0.2) 1.12 kg / 2.46 pounds
1116.0 g / 10.9 N
5 mm Stal (~0.2) 0.70 kg / 1.54 pounds
700.0 g / 6.9 N
10 mm Stal (~0.2) 0.19 kg / 0.41 pounds
186.0 g / 1.8 N
15 mm Stal (~0.2) 0.05 kg / 0.11 pounds
52.0 g / 0.5 N
20 mm Stal (~0.2) 0.02 kg / 0.04 pounds
16.0 g / 0.2 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
This section defines the theoretical weight limit sufficient to initiate the sliding of the magnet down against a vertical steel plate (assuming typical friction). This parameter is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (shearing) - vertical pull
MW 22x6 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.80 kg / 6.17 pounds
2799.0 g / 27.5 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.87 kg / 4.11 pounds
1866.0 g / 18.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.93 kg / 2.06 pounds
933.0 g / 9.2 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.67 kg / 10.28 pounds
4665.0 g / 45.8 N
When mounting a magnet on a vertical surface (e.g., a car body), it will maintain only approx. 1/5 of its maximum pull force. Gravity as well as a weak degree of grip cause that products slide down easier than they pop off the substrate. Planning a hanger? Note that the sliding force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the magnet will give way down under a significantly smaller load. Using a rubber pad can effectively raise the stability.

Table 4: Material efficiency (substrate influence) - sheet metal selection
MW 22x6 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.93 kg / 2.06 pounds
933.0 g / 9.2 N
1 mm
25%
 2.33 kg / 5.14 pounds
2332.5 g / 22.9 N
2 mm
50%
 4.67 kg / 10.28 pounds
4665.0 g / 45.8 N
3 mm
75%
 7.00 kg / 15.43 pounds
6997.5 g / 68.6 N
5 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
10 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
11 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
12 mm
100%
 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
A too thin steel is not enough to take in the full magnetic flux, which wastes potential of the holder. Should you attach a powerful product to a thin surface, the field will penetrate right through and the pull force will drop sharply. To achieve full efficiency of this magnet's power, you require a sufficiently solid piece of steel. The saturation phenomenon causes that on delicate walls (e.g., car bodies), the magnet holds weaker. We suggest choosing the steel dimension according to the table below.

Table 5: Thermal stability (material behavior) - thermal limit
MW 22x6 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 9.33 kg / 20.57 pounds
9330.0 g / 91.5 N
 OK
40 °C -2.2% 9.12 kg / 20.12 pounds
9124.7 g / 89.5 N
 OK
60 °C -4.4% 8.92 kg / 19.66 pounds
8919.5 g / 87.5 N
80 °C -6.6% 8.71 kg / 19.21 pounds
8714.2 g / 85.5 N
100 °C -28.8% 6.64 kg / 14.65 pounds
6643.0 g / 65.2 N
Standard neodymium magnets irreversibly lose strength after exceeding the maximum temperature. Protect against heat – high temperature can permanently destroy this magnet. With every degree above norm, the magnet's force briefly drops. Refrain from using this magnet close to ovens exceeding its operating temperature limit. Exceeding the critical threshold will result in destruction of magnetic properties.
*Technical advisory: Temperature resistance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) are more susceptible to demagnetization sooner compared to rod magnets. The danger warning in the table indicates permanent field degradation for this specific geometry.

Table 6: Two magnets (attraction) - field collision
MW 22x6 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 20.63 kg / 45.48 pounds
4 566 Gs
3.09 kg / 6.82 pounds
3095 g / 30.4 N
 N/A
1 mm 19.34 kg / 42.63 pounds
5 745 Gs
2.90 kg / 6.40 pounds
2901 g / 28.5 N
 17.40 kg / 38.37 pounds
~0 Gs
2 mm 17.95 kg / 39.57 pounds
5 535 Gs
2.69 kg / 5.93 pounds
2692 g / 26.4 N
 16.15 kg / 35.61 pounds
~0 Gs
3 mm 16.52 kg / 36.42 pounds
5 310 Gs
2.48 kg / 5.46 pounds
2478 g / 24.3 N
 14.87 kg / 32.78 pounds
~0 Gs
5 mm 13.69 kg / 30.18 pounds
4 834 Gs
2.05 kg / 4.53 pounds
2053 g / 20.1 N
 12.32 kg / 27.16 pounds
~0 Gs
10 mm 7.75 kg / 17.09 pounds
3 637 Gs
1.16 kg / 2.56 pounds
1162 g / 11.4 N
 6.97 kg / 15.38 pounds
~0 Gs
20 mm 2.06 kg / 4.55 pounds
1 877 Gs
0.31 kg / 0.68 pounds
310 g / 3.0 N
 1.86 kg / 4.10 pounds
~0 Gs
50 mm 0.07 kg / 0.15 pounds
336 Gs
0.01 kg / 0.02 pounds
10 g / 0.1 N
 0.06 kg / 0.13 pounds
~0 Gs
60 mm 0.03 kg / 0.06 pounds
217 Gs
0.00 kg / 0.01 pounds
4 g / 0.0 N
 0.02 kg / 0.05 pounds
~0 Gs
70 mm 0.01 kg / 0.03 pounds
147 Gs
0.00 kg / 0.00 pounds
2 g / 0.0 N
 0.01 kg / 0.03 pounds
~0 Gs
80 mm 0.01 kg / 0.01 pounds
104 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.01 pounds
76 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
57 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two strong neodymiums attract each other from a wider radius than a neodymium and metal setup. Such a system of magnet-to-magnet generates a stronger field and a larger range of operation. Planning to create a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Be careful that when connecting a pair of magnets, the impact force is extreme. The levitation is marginally weaker than the attraction, but still large.
*The magnetic induction for N-N configuration drops to ~0 Gs in the exact middle of the gap (caused by magnetic field nullification).
Note: Figures refer to friction force of a pair of same magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (implants) - warnings
MW 22x6 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 9.5 cm
Hearing aid 10 Gs (1.0 mT) 7.5 cm
Mechanical watch 20 Gs (2.0 mT) 6.0 cm
Mobile device 40 Gs (4.0 mT) 4.5 cm
Remote 50 Gs (5.0 mT) 4.5 cm
Payment card 400 Gs (40.0 mT) 2.0 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm
Powerful magnet radiation poses a large risk to electronic devices as well as pacemakers. These NdFeB products generate a flux that disrupts operation of sensitive medical devices. Remember: the unseen radiation passes through tissues and plastic. Special caution must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, car keys, membranes, and screens. Do not bring the product near payment cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MW 22x6 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.74 km/h
(6.87 m/s)
 0.40 J
30 mm 25.83 km/h
(7.17 m/s)
 0.44 J
50 mm 25.85 km/h
(7.18 m/s)
 0.44 J
100 mm 25.85 km/h
(7.18 m/s)
 0.44 J
Magnetic elements are prone to chipping – a collision with steel risks their cracking. Pay attention to connection velocity – a neodymium left loose becomes dangerous. Impact energy can trigger coating fragments or injury to fingers. Hold the magnet firmly during installation so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Corrosion resistance
MW 22x6 / 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)
For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. Note the thickness of the protective layer.

Table 10: Electrical data (Flux)
MW 22x6 / N38

Parameter Value SI Unit / Description
Magnetic Flux 12 337 Mx 123.4 µWb
Pc Coefficient 0.37 Low (Flat)
Total magnetic flux passing through the pole surface. Essential parameter when building generators as well as sensors. The Pc coefficient defines the working geometry.

Table 11: Hydrostatics and buoyancy
MW 22x6 / N38

Environment Effective steel pull Effect
Air (land) 9.33 kg Standard
Water (riverbed) 10.68 kg
(+1.35 kg buoyancy gain)
+14.5%
Warning: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.
The magnetic field penetrates through water without any losses. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Caution: On a vertical surface, the magnet retains only a fraction of its nominal pull.

2. Steel thickness impact

*Thin metal sheet (e.g. computer case) significantly limits 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) = 0.37

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%

Ecology and recycling (GPSR)

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: 010047-2026
Quick Unit Converter

Force (pull)

Field Strength

Enter your figure into a field, and the remaining units change on the fly.

Check out more proposals

SMZR 32x200 / N52 - magnetic separator with handle
Product available Ships today (order by 14:00)

SMZR 32x200 / N52 - magnetic separator with handle

701.10 zł brutto / pcs
MPL 40x7x3 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 40x7x3 / N38 - lamellar magnet

2.79 zł brutto / pcs
MPL 30x10x8 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 30x10x8 / N38 - lamellar magnet

10.71 zł brutto / pcs
BM 550x180x70 [4x M8] - magnetic beam
Product available Ships today (order by 14:00)

BM 550x180x70 [4x M8] - magnetic beam

5708.18 zł brutto / pcs
The offered product is an extremely powerful cylindrical magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø22x6 mm, guarantees the highest energy density. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 9.33 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is perfect for building generators, advanced Hall effect sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the pull force of 91.51 N with a weight of only 17.11 g, this rod is indispensable in miniature devices and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 22.1 mm) using epoxy glues. To ensure stability in industry, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø22x6), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.
This model is characterized by dimensions Ø22x6 mm, which, at a weight of 17.11 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 9.33 kg (force ~91.51 N), which, with such compact dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.
This rod magnet is magnetized axially (along the height of 6 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is standard when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized through the diameter if your project requires it.

Advantages and disadvantages of neodymium magnets.

Pros

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
  • They possess excellent resistance to magnetism drop when exposed to external magnetic sources,
  • The use of an refined layer of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Magnets possess exceptionally strong magnetic induction on the working surface,
  • Neodymium magnets are characterized by extremely 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 freedom in forming and the ability to customize to complex applications,
  • Fundamental importance in advanced technology sectors – they are commonly used in magnetic memories, electric drive systems, precision medical tools, also modern systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • Neodymium magnets decrease 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 stability even at temperatures up to 230°C
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing threads and complex shapes in magnets, we propose using casing - magnetic mount.
  • 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, tiny parts of these magnets are able to complicate diagnosis 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

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

The declared magnet strength represents the peak performance, measured under ideal test conditions, specifically:
  • with the application of a yoke made of low-carbon steel, ensuring full magnetic saturation
  • whose transverse dimension equals approx. 10 mm
  • with a plane free of scratches
  • without any clearance between the magnet and steel
  • for force acting at a right angle (in the magnet axis)
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

During everyday use, the actual holding force depends on many variables, listed from most significant:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Plate material – mild steel attracts best. Alloy steels reduce magnetic permeability and holding force.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Pinching danger

Large magnets can break fingers in a fraction of a second. Do not place your hand between two attracting surfaces.

Keep away from children

Absolutely store magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are very dangerous.

Fragile material

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets will cause them breaking into shards.

Precision electronics

Note: rare earth magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your phone, tablet, and navigation systems.

Fire risk

Combustion risk: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Powerful field

Use magnets consciously. Their huge power can shock even professionals. Be vigilant and respect their power.

Electronic hazard

Data protection: Strong magnets can damage data carriers and sensitive devices (heart implants, hearing aids, mechanical watches).

Heat warning

Watch the temperature. Exposing the magnet to high heat will permanently weaken its properties and pulling force.

Life threat

Patients with a ICD should maintain an safe separation from magnets. The magnetic field can stop the functioning of the life-saving device.

Sensitization to coating

Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If redness happens, cease handling magnets and use protective gear.

Attention! Learn more about risks in the article: Safety of working with magnets.