← previous
next →
Product available Ships tomorrow CO2 GPSR PPWR REACH

MW 3x2 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010064

GTIN/EAN: 5906301810636

5.00
Load capacity 0.30 kg / 2.99 N Magnetic Induction 493.99 mT / 4940 Gs
Diameter Ø
3 mm [±0,1 mm]
Height
2 mm [±0,1 mm]
Weight
0.11 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical parameters »

0.1200 zł net / pcs

0.1476 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
0.1200 zł
0.1476 zł
price from 1000 pcs
0.1080 zł
0.1328 zł
price from 2000 pcs
0.1056 zł
0.1299 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!

Physical properties - MW 3x2 / N38 - cylindrical magnet

Specification / characteristics - MW 3x2 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010064
GTIN/EAN 5906301810636
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 3 mm [±0,1 mm]
Height 2 mm [±0,1 mm]
Weight 0.11 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.30 kg / 2.99 N
Magnetic Induction ~ ? 493.99 mT / 4940 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 3x2 / 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

Technical analysis of the product - technical parameters

These information represent the outcome of a engineering analysis. Values rely on models for the class Nd2Fe14B. Operational parameters might slightly differ from theoretical values. Treat these data as a supplementary guide when designing systems.

Table 1: Static pull force (force vs gap) - interaction chart
MW 3x2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4928 Gs
492.8 mT
 0.30 kg / 0.66 lbs
300.0 g / 2.9 N
 weak grip
1 mm 2106 Gs
210.6 mT
 0.05 kg / 0.12 lbs
54.8 g / 0.5 N
 weak grip
2 mm 845 Gs
84.5 mT
 0.01 kg / 0.02 lbs
8.8 g / 0.1 N
 weak grip
3 mm 393 Gs
39.3 mT
 0.00 kg / 0.00 lbs
1.9 g / 0.0 N
 weak grip
5 mm 124 Gs
12.4 mT
 0.00 kg / 0.00 lbs
0.2 g / 0.0 N
 weak grip
10 mm 21 Gs
2.1 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
15 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
20 mm 3 Gs
0.3 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
30 mm 1 Gs
0.1 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
50 mm 0 Gs
0.0 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 weak grip
Pulling power weakens sharply with every mm of spacing. Keep in mind that even a very thin break (e.g., contamination, varnish, rust) significantly reduces the pull force. Neodymiums hold optimally during direct contact; air break drastically cuts the force. See how quickly the parameters plummet, when the magnet does not touch flatly to the steel surface. When planning the arrangement, discard unnecessary gaps.

Table 2: Slippage load (wall)
MW 3x2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.06 kg / 0.13 lbs
60.0 g / 0.6 N
1 mm Stal (~0.2) 0.01 kg / 0.02 lbs
10.0 g / 0.1 N
2 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 g / 0.0 N
3 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
5 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
The following data defines the estimated holding capacity needed to cause the sliding of the magnet down along a upright steel plate (assuming standard friction). This value is a function of the separation distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MW 3x2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.09 kg / 0.20 lbs
90.0 g / 0.9 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.06 kg / 0.13 lbs
60.0 g / 0.6 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.03 kg / 0.07 lbs
30.0 g / 0.3 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.15 kg / 0.33 lbs
150.0 g / 1.5 N
When hanging a magnet on a upright surface (e.g., a fridge), it will only hold just about 1/5 of its maximum pull force. Gravitational force and a low friction coefficient influence the fact that holders move down faster than they pop off the substrate. Want to create a wall mount? Note that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the magnet will slide down under a noticeably lighter weight. Using a rubber pad can drastically improve the result.

Table 4: Material efficiency (saturation) - power losses
MW 3x2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.03 kg / 0.07 lbs
30.0 g / 0.3 N
1 mm
25%
 0.08 kg / 0.17 lbs
75.0 g / 0.7 N
2 mm
50%
 0.15 kg / 0.33 lbs
150.0 g / 1.5 N
3 mm
75%
 0.22 kg / 0.50 lbs
225.0 g / 2.2 N
5 mm
100%
 0.30 kg / 0.66 lbs
300.0 g / 2.9 N
10 mm
100%
 0.30 kg / 0.66 lbs
300.0 g / 2.9 N
11 mm
100%
 0.30 kg / 0.66 lbs
300.0 g / 2.9 N
12 mm
100%
 0.30 kg / 0.66 lbs
300.0 g / 2.9 N
A thin sheet cannot conduct the entire magnetic field, which squanders power of the holder. If you install a neodymium to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To squeeze 100% of this magnet's potential, you require a sufficiently solid piece of steel. The material oversaturation means that on thin elements (e.g., thin profiles), the holder works worse. We advise picking the steel dimension according to the table below.

Table 5: Working in heat (stability) - resistance threshold
MW 3x2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.30 kg / 0.66 lbs
300.0 g / 2.9 N
 OK
40 °C -2.2% 0.29 kg / 0.65 lbs
293.4 g / 2.9 N
 OK
60 °C -4.4% 0.29 kg / 0.63 lbs
286.8 g / 2.8 N
 OK
80 °C -6.6% 0.28 kg / 0.62 lbs
280.2 g / 2.7 N
100 °C -28.8% 0.21 kg / 0.47 lbs
213.6 g / 2.1 N
Standard neodymium magnets change their properties power past the thermal threshold. Watch out for overheating – excessive heat can irreversibly destroy this magnet. As the temperature rises, the magnet's force temporarily decreases. Refrain from using this magnet in hot environments higher than its safe range. Ignoring the limit will lead to permanent loss of magnetic properties.
*Technical advisory: Thermal stability is determined by both grade, and the Permeance Coefficient Pc. Low-profile magnets (low Pc) may lose charge permanently sooner than taller cylinders. The danger warning in the table signals permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 3x2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 1.06 kg / 2.33 lbs
5 766 Gs
0.16 kg / 0.35 lbs
159 g / 1.6 N
 N/A
1 mm 0.49 kg / 1.08 lbs
6 712 Gs
0.07 kg / 0.16 lbs
74 g / 0.7 N
 0.44 kg / 0.97 lbs
~0 Gs
2 mm 0.19 kg / 0.43 lbs
4 213 Gs
0.03 kg / 0.06 lbs
29 g / 0.3 N
 0.17 kg / 0.38 lbs
~0 Gs
3 mm 0.08 kg / 0.17 lbs
2 629 Gs
0.01 kg / 0.02 lbs
11 g / 0.1 N
 0.07 kg / 0.15 lbs
~0 Gs
5 mm 0.01 kg / 0.03 lbs
1 131 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.03 lbs
~0 Gs
10 mm 0.00 kg / 0.00 lbs
248 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
20 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
50 mm 0.00 kg / 0.00 lbs
3 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
60 mm 0.00 kg / 0.00 lbs
2 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
70 mm 0.00 kg / 0.00 lbs
1 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
80 mm 0.00 kg / 0.00 lbs
1 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
1 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
0 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 significantly greater distance than a neodymium and metal combination. The setup of magnet-to-magnet creates a more powerful interaction and a larger range of action. Want to build a powerful holder? Apply two magnets instead of one magnet and a steel. Exercise caution that when bringing together two magnets, the collision energy is massive. The repulsion force is marginally weaker than the connection force, but still impressive.
*Flux density for N-N configuration reaches ~0 Gs at the geometric center of the gap (resulting from vector opposition).
Attention: Estimates show friction force of a pair of same magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - warnings
MW 3x2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.0 cm
Hearing aid 10 Gs (1.0 mT) 1.5 cm
Timepiece 20 Gs (2.0 mT) 1.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 1.0 cm
Remote 50 Gs (5.0 mT) 1.0 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Powerful magnet radiation is a serious hazard to electronics and pacemakers. These neodymiums generate a field that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation penetrates the body and glass. Increased vigilance must be taken by people with cochlear implants and drug dispensers. Also at risk are: automatic timepieces, car keys, speakers, and screens. Do not place the magnet near cards, hard drives, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - warning
MW 3x2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 20.61 km/h
(5.73 m/s)
 0.00 J
30 mm 20.62 km/h
(5.73 m/s)
 0.00 J
50 mm 20.62 km/h
(5.73 m/s)
 0.00 J
100 mm 20.62 km/h
(5.73 m/s)
 0.00 J
NdFeB products are delicate – a strong collision with metal risks their cracking. Control the attraction moment – a magnet released freely speeds with massive force. Impact energy can trigger coating fragments or painful pinches to skin. Be sure to control the product during bringing near metal so it doesn't slam with momentum against the metal. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Use safety goggles when handling with large magnets.

Table 9: Surface protection spec
MW 3x2 / 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: Electrical data (Pc)
MW 3x2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 353 Mx 3.5 µWb
Pc Coefficient 0.71 High (Stable)
Flux value passing through the magnet pole. Essential parameter for generator designers and motors. The Pc coefficient determines the working geometry.

Table 11: Submerged application
MW 3x2 / N38

Environment Effective steel pull Effect
Air (land) 0.30 kg Standard
Water (riverbed) 0.34 kg
(+0.04 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.
Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Caution: On a vertical wall, the magnet holds just a fraction of its perpendicular strength.

2. Steel thickness impact

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

3. Thermal stability

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

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71

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 specification and ecology

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%

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: 010064-2026
Magnet Unit Converter

Magnet pull force

Field Strength

Simply complete a single box, to let the converter compute the rest automatically.

Other products

MPL 12.5x12.5x5 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 12.5x12.5x5 / N38 - lamellar magnet

2.83 zł brutto / pcs
UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder
Product available Ships tomorrow

UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

599.99 zł brutto / pcs
MW 35x5 / N38 - cylindrical magnet
Product available Ships tomorrow

MW 35x5 / N38 - cylindrical magnet

13.81 zł brutto / pcs
UMC 75x11/6x18 / N38 - cylindrical magnetic holder
Product available Ships tomorrow

UMC 75x11/6x18 / N38 - cylindrical magnetic holder

169.86 zł brutto / pcs
This product is a very strong cylindrical magnet, manufactured from advanced NdFeB material, which, at dimensions of Ø3x2 mm, guarantees the highest energy density. The MW 3x2 / N38 component boasts a tolerance of ±0.1mm and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 0.30 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Furthermore, its Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.
It finds application in DIY projects, advanced automation, and broadly understood industry, serving as a positioning or actuating element. Thanks to the high power of 2.99 N with a weight of only 0.11 g, this cylindrical magnet is indispensable in miniature devices and wherever every gram matters.
Since our magnets have a very precise dimensions, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 3.1 mm) using epoxy glues. To ensure stability in industry, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.
Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering an optimal price-to-power ratio and high resistance to demagnetization. If you need the strongest magnets in the same volume (Ø3x2), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
The presented product is a neodymium magnet with precisely defined parameters: diameter 3 mm and height 2 mm. The key parameter here is the lifting capacity amounting to approximately 0.30 kg (force ~2.99 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface against external factors, 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 3 mm. Such an arrangement is most desirable 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.

Strengths as well as weaknesses of neodymium magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They retain attractive force for almost 10 years – the loss is just ~1% (based on simulations),
  • They feature excellent resistance to magnetism drop as a result of opposing magnetic fields,
  • In other words, due to the glossy surface of nickel, the element gains a professional look,
  • Magnets exhibit very high magnetic induction on the working surface,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to the option of free shaping and adaptation to custom projects, neodymium magnets can be modeled in a wide range of geometric configurations, which makes them more universal,
  • Huge importance in electronics industry – they find application in hard drives, drive modules, medical equipment, as well as complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Problematic aspects of neodymium magnets and proposals for their use:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these devices can be problematic in diagnostics medical in case of swallowing.
  • Due to neodymium price, their price exceeds standard values,

Pull force analysis

Magnetic strength at its maximum – what affects it?

The specified lifting capacity refers to the maximum value, measured under ideal test conditions, namely:
  • using a sheet made of high-permeability steel, serving as a ideal flux conductor
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • with a surface perfectly flat
  • with direct contact (no impurities)
  • during pulling in a direction vertical to the plane
  • at conditions approx. 20°C

Practical lifting capacity: influencing factors

Bear in mind that the application force may be lower influenced by elements below, starting with the most relevant:
  • Distance (between the magnet and the plate), because even a very small distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Load vector – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Plate material – mild steel attracts best. Alloy steels decrease magnetic permeability and holding force.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate lowers the lifting capacity.

Warnings
Precision electronics

Navigation devices and smartphones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Protective goggles

NdFeB magnets are ceramic materials, which means they are prone to chipping. Clashing of two magnets will cause them cracking into shards.

Safe operation

Use magnets consciously. Their immense force can surprise even professionals. Stay alert and respect their force.

Keep away from computers

Data protection: Strong magnets can damage data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).

Hand protection

Big blocks can crush fingers in a fraction of a second. Under no circumstances place your hand betwixt two strong magnets.

Machining danger

Combustion risk: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.

Maximum temperature

Avoid heat. NdFeB magnets are susceptible to heat. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).

Danger to pacemakers

Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Warning for allergy sufferers

Some people suffer from a contact allergy to Ni, which is the common plating for neodymium magnets. Extended handling can result in skin redness. We strongly advise wear safety gloves.

Do not give to children

Neodymium magnets are not toys. Eating several magnets can lead to them pinching intestinal walls, which poses a direct threat to life and requires urgent medical intervention.

Security! More info about risks in the article: Magnet Safety Guide.