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

MW 45x30 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010073

GTIN/EAN: 5906301810728

Load capacity 69.46 kg / 681.39 N Magnetic Induction 495.87 mT / 4959 Gs
Diameter Ø
45 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Weight
357.85 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

view parameters »

111.22 zł net / pcs

136.80 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
111.22 zł
136.80 zł
price from 10 pcs
104.55 zł
128.59 zł
price from 25 pcs
97.87 zł
120.38 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 - MW 45x30 / N38 - cylindrical magnet

Specification / characteristics - MW 45x30 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010073
GTIN/EAN 5906301810728
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 45 mm [±0,1 mm]
Height 30 mm [±0,1 mm]
Weight 357.85 g
Magnetization Direction ↑ axial
Load capacity ~ ? 69.46 kg / 681.39 N
Magnetic Induction ~ ? 495.87 mT / 4959 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 45x30 / 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

Technical modeling of the magnet - report

Presented data constitute the result of a engineering simulation. Values were calculated on algorithms for the material Nd2Fe14B. Real-world parameters may differ. Treat these calculations as a preliminary roadmap when designing systems.

Table 1: Static pull force (force vs gap) - characteristics
MW 45x30 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4958 Gs
495.8 mT
 69.46 kg / 153.13 lbs
69460.0 g / 681.4 N
 critical level
1 mm 4742 Gs
474.2 mT
 63.55 kg / 140.11 lbs
63553.9 g / 623.5 N
 critical level
2 mm 4523 Gs
452.3 mT
 57.81 kg / 127.44 lbs
57805.8 g / 567.1 N
 critical level
3 mm 4303 Gs
430.3 mT
 52.33 kg / 115.36 lbs
52327.7 g / 513.3 N
 critical level
5 mm 3870 Gs
387.0 mT
 42.33 kg / 93.32 lbs
42329.9 g / 415.3 N
 critical level
10 mm 2886 Gs
288.6 mT
 23.53 kg / 51.88 lbs
23531.8 g / 230.8 N
 critical level
15 mm 2106 Gs
210.6 mT
 12.54 kg / 27.64 lbs
12537.0 g / 123.0 N
 critical level
20 mm 1535 Gs
153.5 mT
 6.66 kg / 14.68 lbs
6657.1 g / 65.3 N
 medium risk
30 mm 845 Gs
84.5 mT
 2.02 kg / 4.45 lbs
2018.9 g / 19.8 N
 medium risk
50 mm 315 Gs
31.5 mT
 0.28 kg / 0.62 lbs
279.5 g / 2.7 N
 safe
Pulling power decreases significantly with every mm of gap. Note that even a very thin break (e.g., contamination, varnish, dust) strongly reduces the pull force. Magnets work strongest during direct contact; distance nullifies the power. Analyze how rapidly the pull force drop, when the product does not adhere directly to the metal substrate. When calculating the arrangement, eliminate redundant distances.

Table 2: Slippage capacity (vertical surface)
MW 45x30 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 13.89 kg / 30.63 lbs
13892.0 g / 136.3 N
1 mm Stal (~0.2) 12.71 kg / 28.02 lbs
12710.0 g / 124.7 N
2 mm Stal (~0.2) 11.56 kg / 25.49 lbs
11562.0 g / 113.4 N
3 mm Stal (~0.2) 10.47 kg / 23.07 lbs
10466.0 g / 102.7 N
5 mm Stal (~0.2) 8.47 kg / 18.66 lbs
8466.0 g / 83.1 N
10 mm Stal (~0.2) 4.71 kg / 10.37 lbs
4706.0 g / 46.2 N
15 mm Stal (~0.2) 2.51 kg / 5.53 lbs
2508.0 g / 24.6 N
20 mm Stal (~0.2) 1.33 kg / 2.94 lbs
1332.0 g / 13.1 N
30 mm Stal (~0.2) 0.40 kg / 0.89 lbs
404.0 g / 4.0 N
50 mm Stal (~0.2) 0.06 kg / 0.12 lbs
56.0 g / 0.5 N
The table below presents the approximate force needed to initiate the slippage of the magnet downwards along a vertical steel plate (considering typical friction). The holding force is a function of the gap size between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 45x30 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
20.84 kg / 45.94 lbs
20838.0 g / 204.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
13.89 kg / 30.63 lbs
13892.0 g / 136.3 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
6.95 kg / 15.31 lbs
6946.0 g / 68.1 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
34.73 kg / 76.57 lbs
34730.0 g / 340.7 N
When mounting a holder on a vertical surface (e.g., a fridge), it you can count on just approx. 20%-30% of nominal attraction strength. Gravity and a weak degree of grip mean that holders move down easier than they detach. Planning a hanger? Consider that the shear force is noticeably lower than the perpendicular breakaway force. On a slippery surface, the element will slip down under a significantly smaller load. Application of an anti-slip pad can significantly raise the stability.

Table 4: Steel thickness (saturation) - power losses
MW 45x30 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
 2.32 kg / 5.10 lbs
2315.3 g / 22.7 N
1 mm
8%
 5.79 kg / 12.76 lbs
5788.3 g / 56.8 N
2 mm
17%
 11.58 kg / 25.52 lbs
11576.7 g / 113.6 N
3 mm
25%
 17.37 kg / 38.28 lbs
17365.0 g / 170.4 N
5 mm
42%
 28.94 kg / 63.81 lbs
28941.7 g / 283.9 N
10 mm
83%
 57.88 kg / 127.61 lbs
57883.3 g / 567.8 N
11 mm
92%
 63.67 kg / 140.37 lbs
63671.7 g / 624.6 N
12 mm
100%
 69.46 kg / 153.13 lbs
69460.0 g / 681.4 N
A too thin steel cannot absorb the full magnetic flux, which squanders power of the holder. Should you install a neodymium to a thin surface, the magnetism will penetrate right through and the attraction force will be weaker. To utilize the maximum of this neodymium's potential, you require a sufficiently solid element of metal. The saturation phenomenon causes that on thin elements (e.g., appliance housings), the magnet holds weaker. We advise picking the steel cross-section from these parameters.

Table 5: Thermal resistance (material behavior) - thermal limit
MW 45x30 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 69.46 kg / 153.13 lbs
69460.0 g / 681.4 N
 OK
40 °C -2.2% 67.93 kg / 149.76 lbs
67931.9 g / 666.4 N
 OK
60 °C -4.4% 66.40 kg / 146.40 lbs
66403.8 g / 651.4 N
 OK
80 °C -6.6% 64.88 kg / 143.03 lbs
64875.6 g / 636.4 N
100 °C -28.8% 49.46 kg / 109.03 lbs
49455.5 g / 485.2 N
Classic neodymiums change their properties parameters past the thermal threshold. Protect against heat – excessive heat can irreversibly damage this product. With every degree above norm, the neodymium's force momentarily drops. Do not use this product in hot environments exceeding its working range. Too high temperature will cause permanent loss of magnetic properties.
*Technical advisory: Thermal stability depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) are more susceptible to demagnetization under lower heat stress than taller cylinders. Warning indicator in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - forces in the system
MW 45x30 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 241.01 kg / 531.33 lbs
5 803 Gs
36.15 kg / 79.70 lbs
36151 g / 354.6 N
 N/A
1 mm 230.79 kg / 508.80 lbs
9 703 Gs
34.62 kg / 76.32 lbs
34618 g / 339.6 N
 207.71 kg / 457.92 lbs
~0 Gs
2 mm 220.52 kg / 486.16 lbs
9 485 Gs
33.08 kg / 72.92 lbs
33078 g / 324.5 N
 198.47 kg / 437.54 lbs
~0 Gs
3 mm 210.44 kg / 463.94 lbs
9 265 Gs
31.57 kg / 69.59 lbs
31566 g / 309.7 N
 189.39 kg / 417.54 lbs
~0 Gs
5 mm 190.94 kg / 420.95 lbs
8 826 Gs
28.64 kg / 63.14 lbs
28641 g / 281.0 N
 171.85 kg / 378.86 lbs
~0 Gs
10 mm 146.87 kg / 323.80 lbs
7 741 Gs
22.03 kg / 48.57 lbs
22031 g / 216.1 N
 132.19 kg / 291.42 lbs
~0 Gs
20 mm 81.65 kg / 180.01 lbs
5 771 Gs
12.25 kg / 27.00 lbs
12247 g / 120.1 N
 73.48 kg / 162.01 lbs
~0 Gs
50 mm 12.52 kg / 27.60 lbs
2 260 Gs
1.88 kg / 4.14 lbs
1878 g / 18.4 N
 11.27 kg / 24.84 lbs
~0 Gs
60 mm 7.01 kg / 15.44 lbs
1 690 Gs
1.05 kg / 2.32 lbs
1051 g / 10.3 N
 6.30 kg / 13.90 lbs
~0 Gs
70 mm 4.06 kg / 8.95 lbs
1 287 Gs
0.61 kg / 1.34 lbs
609 g / 6.0 N
 3.66 kg / 8.06 lbs
~0 Gs
80 mm 2.44 kg / 5.38 lbs
998 Gs
0.37 kg / 0.81 lbs
366 g / 3.6 N
 2.20 kg / 4.84 lbs
~0 Gs
90 mm 1.51 kg / 3.34 lbs
786 Gs
0.23 kg / 0.50 lbs
227 g / 2.2 N
 1.36 kg / 3.01 lbs
~0 Gs
100 mm 0.97 kg / 2.14 lbs
629 Gs
0.15 kg / 0.32 lbs
145 g / 1.4 N
 0.87 kg / 1.92 lbs
~0 Gs
Two magnets interact from a significantly greater distance than a magnet and sheet setup. The connection of magnet-to-magnet creates a more powerful interaction and a wider radius of action. Designing a solid fastener? Apply two magnets instead of one magnet and a striker plate. Be careful that when bringing together two magnets, the collision energy is extreme. The levitation is marginally weaker than the connection force, but still large.
*Flux density between like poles reaches ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Important: Calculations demonstrate shear force of a pair of identical magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Protective zones (electronics) - precautionary measures
MW 45x30 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 25.5 cm
Hearing aid 10 Gs (1.0 mT) 20.0 cm
Timepiece 20 Gs (2.0 mT) 15.5 cm
Phone / Smartphone 40 Gs (4.0 mT) 12.0 cm
Car key 50 Gs (5.0 mT) 11.0 cm
Payment card 400 Gs (40.0 mT) 4.5 cm
HDD hard drive 600 Gs (60.0 mT) 4.0 cm
Extremely neodym field poses a serious hazard to IT equipment and pacemakers. These magnets produce a field that destroys function of sensitive medical devices. Remember: the invisible magnetic field penetrates the body and housings. Exceptional care must be exercised by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and displays. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - warning
MW 45x30 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 17.63 km/h
(4.90 m/s)
 4.29 J
30 mm 20.82 km/h
(5.78 m/s)
 5.98 J
50 mm 21.10 km/h
(5.86 m/s)
 6.15 J
100 mm 21.17 km/h
(5.88 m/s)
 6.18 J
Neodymium magnets are delicate – a strong collision with metal can result in shattering. Control the attraction moment – a neodymium left loose speeds with massive force. Striking energy can trigger coating fragments or painful pinches to skin. Always hold the magnet during installation so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the magnet. Use safety goggles when working with large magnets.

Table 9: Surface protection spec
MW 45x30 / 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)
Neodymium magnets are highly susceptible to corrosion without proper protection. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Construction data (Pc)
MW 45x30 / N38

Parameter Value SI Unit / Description
Magnetic Flux 79 446 Mx 794.5 µWb
Pc Coefficient 0.71 High (Stable)
Flux value emitted by the pole surface. Essential parameter for generator designers as well as sensors. The Pc coefficient defines the working geometry.

Table 11: Submerged application
MW 45x30 / N38

Environment Effective steel pull Effect
Air (land) 69.46 kg Standard
Water (riverbed) 79.53 kg
(+10.07 kg buoyancy gain)
+14.5%
Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
In water, the magnet feels stronger thanks to Archimedes' principle. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Sliding resistance

*Note: On a vertical surface, the magnet holds merely a fraction of its nominal pull.

2. Steel saturation

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

3. Temperature resistance

*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) = 0.71

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 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%

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: 010073-2026
Measurement Calculator

Magnet pull force

Field Strength

Enter a number in one of the inputs, and the rest will convert instantly.

See more offers

MP 10x4.3x4 / N38 - ring magnet
Product available Ships today (order by 14:00)

MP 10x4.3x4 / N38 - ring magnet

1.045 zł brutto / pcs
UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
Product available Ships today (order by 14:00)

UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

23.37 zł brutto / pcs
SM 25x325 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x325 [2xM8] / N52 - magnetic separator

1094.70 zł brutto / pcs
SM 25x400 [2xM8] / N42 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x400 [2xM8] / N42 - magnetic separator

1131.60 zł brutto / pcs
This product is a very strong cylinder magnet, manufactured from durable NdFeB material, which, at dimensions of Ø45x30 mm, guarantees maximum efficiency. This specific item features high dimensional repeatability and professional build quality, making it a perfect solution for professional engineers and designers. As a magnetic rod with impressive force (approx. 69.46 kg), this product is in stock from our European logistics center, ensuring lightning-fast order fulfillment. Moreover, its triple-layer Ni-Cu-Ni coating secures 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 maximum induction on a small surface counts. Thanks to the pull force of 681.39 N with a weight of only 357.85 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., 45.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, 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 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 (Ø45x30), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.
This model is characterized by dimensions Ø45x30 mm, which, at a weight of 357.85 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 69.46 kg (force ~681.39 N), which, with such defined dimensions, proves the high power of the NdFeB material. 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 45 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 diametrically if your project requires it.

Advantages as well as disadvantages of rare earth magnets.

Pros

Besides their immense magnetic power, neodymium magnets offer the following advantages:
  • They retain magnetic properties for almost 10 years – the loss is just ~1% (based on simulations),
  • Magnets effectively protect themselves against demagnetization caused by ambient magnetic noise,
  • A magnet with a metallic gold surface has an effective appearance,
  • Magnetic induction on the working part of the magnet remains impressive,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to flexibility in constructing and the ability to customize to specific needs,
  • Significant place in future technologies – they find application in hard drives, motor assemblies, medical devices, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in compact constructions

Limitations

Cons of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of making threads in the magnet and complex shapes - recommended is casing - mounting mechanism.
  • Health risk resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what it depends on?

Breakaway force is the result of a measurement for optimal configuration, including:
  • with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section minimum 10 mm
  • characterized by smoothness
  • with zero gap (no paint)
  • during pulling in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Determinants of practical lifting force of a magnet

Please note that the application force will differ depending on elements below, in order of importance:
  • Distance (betwixt the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet holds much less (typically approx. 20-30% of nominal force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a small distance between the magnet’s surface and the plate reduces the lifting capacity.

H&S for magnets
Threat to electronics

Powerful magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Stay away of min. 10 cm.

Adults only

NdFeB magnets are not intended for children. Accidental ingestion of a few magnets can lead to them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.

Handling guide

Before starting, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.

Allergic reactions

Some people have a sensitization to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to dermatitis. We strongly advise wear safety gloves.

GPS Danger

A powerful magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Do not bring magnets near a smartphone to prevent damaging the sensors.

Crushing force

Danger of trauma: The attraction force is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Fragile material

Despite the nickel coating, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Operating temperature

Control the heat. Heating the magnet to high heat will destroy its magnetic structure and strength.

Fire warning

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Pacemakers

People with a heart stimulator must maintain an large gap from magnets. The magnetism can interfere with the operation of the life-saving device.

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