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

MW 20x35 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010043

GTIN/EAN: 5906301810421

5.00
Load capacity 9.58 kg / 93.97 N Magnetic Induction 595.77 mT / 5958 Gs
Diameter Ø
20 mm [±0,1 mm]
Height
35 mm [±0,1 mm]
Weight
82.47 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see specifications »

40.26 zł net / pcs

49.52 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
40.26 zł
49.52 zł
price from 20 pcs
37.84 zł
46.55 zł
price from 70 pcs
35.43 zł
43.58 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 20x35 / N38 - cylindrical magnet

Specification / characteristics - MW 20x35 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010043
GTIN/EAN 5906301810421
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 35 mm [±0,1 mm]
Weight 82.47 g
Magnetization Direction ↑ axial
Load capacity ~ ? 9.58 kg / 93.97 N
Magnetic Induction ~ ? 595.77 mT / 5958 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x35 / 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 simulation of the product - report

These data are the result of a mathematical calculation. Results were calculated on algorithms for the class Nd2Fe14B. Actual conditions may differ from theoretical values. Treat these calculations as a reference point for designers.

Table 1: Static pull force (force vs distance) - characteristics
MW 20x35 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 5955 Gs
595.5 mT
 9.58 kg / 21.12 lbs
9580.0 g / 94.0 N
 medium risk
1 mm 5357 Gs
535.7 mT
 7.75 kg / 17.09 lbs
7751.3 g / 76.0 N
 medium risk
2 mm 4769 Gs
476.9 mT
 6.14 kg / 13.55 lbs
6144.2 g / 60.3 N
 medium risk
3 mm 4214 Gs
421.4 mT
 4.80 kg / 10.58 lbs
4797.3 g / 47.1 N
 medium risk
5 mm 3242 Gs
324.2 mT
 2.84 kg / 6.26 lbs
2839.3 g / 27.9 N
 medium risk
10 mm 1668 Gs
166.8 mT
 0.75 kg / 1.66 lbs
751.8 g / 7.4 N
 low risk
15 mm 921 Gs
92.1 mT
 0.23 kg / 0.51 lbs
229.1 g / 2.2 N
 low risk
20 mm 555 Gs
55.5 mT
 0.08 kg / 0.18 lbs
83.1 g / 0.8 N
 low risk
30 mm 246 Gs
24.6 mT
 0.02 kg / 0.04 lbs
16.4 g / 0.2 N
 low risk
50 mm 78 Gs
7.8 mT
 0.00 kg / 0.00 lbs
1.6 g / 0.0 N
 low risk
Pulling power weakens sharply with every mm of gap. Note that every additional insulation layer (e.g., contamination, varnish, dust) strongly reduces the pull force. Magnetic products operate optimally during direct contact; gap drastically cuts the power. Notice how flashily the parameters fall, when the product does not adhere tightly to the metal substrate. When designing the arrangement, discard additional spacers.

Table 2: Shear hold (vertical surface)
MW 20x35 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.92 kg / 4.22 lbs
1916.0 g / 18.8 N
1 mm Stal (~0.2) 1.55 kg / 3.42 lbs
1550.0 g / 15.2 N
2 mm Stal (~0.2) 1.23 kg / 2.71 lbs
1228.0 g / 12.0 N
3 mm Stal (~0.2) 0.96 kg / 2.12 lbs
960.0 g / 9.4 N
5 mm Stal (~0.2) 0.57 kg / 1.25 lbs
568.0 g / 5.6 N
10 mm Stal (~0.2) 0.15 kg / 0.33 lbs
150.0 g / 1.5 N
15 mm Stal (~0.2) 0.05 kg / 0.10 lbs
46.0 g / 0.5 N
20 mm Stal (~0.2) 0.02 kg / 0.04 lbs
16.0 g / 0.2 N
30 mm Stal (~0.2) 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
This section shows the theoretical holding capacity needed to initiate the shifting of the magnet downwards along a upright steel wall (assuming standard friction). This parameter is a function of the separation distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - vertical pull
MW 20x35 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.87 kg / 6.34 lbs
2874.0 g / 28.2 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.92 kg / 4.22 lbs
1916.0 g / 18.8 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.96 kg / 2.11 lbs
958.0 g / 9.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
When placing a magnet on a upright wall (e.g., a board), it will only hold just approx. 1/5 of its maximum pull force. Gravitational force and a weak degree of grip mean that holders slip easier than they pull off. Planning a vertical fastening? Remember that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the holder will slide down under a noticeably lighter load. Utilizing a rubberized coating can effectively improve the result.

Table 4: Material efficiency (substrate influence) - power losses
MW 20x35 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.96 kg / 2.11 lbs
958.0 g / 9.4 N
1 mm
25%
 2.40 kg / 5.28 lbs
2395.0 g / 23.5 N
2 mm
50%
 4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
3 mm
75%
 7.19 kg / 15.84 lbs
7185.0 g / 70.5 N
5 mm
100%
 9.58 kg / 21.12 lbs
9580.0 g / 94.0 N
10 mm
100%
 9.58 kg / 21.12 lbs
9580.0 g / 94.0 N
11 mm
100%
 9.58 kg / 21.12 lbs
9580.0 g / 94.0 N
12 mm
100%
 9.58 kg / 21.12 lbs
9580.0 g / 94.0 N
A thin metal plate cannot conduct the full magnetic flux, which squanders power of the magnet. Should you attach a powerful product to a too thin substrate, the field will penetrate right through and the attraction force will be weaker. To achieve full efficiency of this magnet's potential, you require a sufficiently solid backing of metal. The material oversaturation means that on delicate walls (e.g., car bodies), the holder shows lower pull force. We advise picking the steel cross-section based on the following data.

Table 5: Working in heat (material behavior) - thermal limit
MW 20x35 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 9.58 kg / 21.12 lbs
9580.0 g / 94.0 N
 OK
40 °C -2.2% 9.37 kg / 20.66 lbs
9369.2 g / 91.9 N
 OK
60 °C -4.4% 9.16 kg / 20.19 lbs
9158.5 g / 89.8 N
 OK
80 °C -6.6% 8.95 kg / 19.73 lbs
8947.7 g / 87.8 N
100 °C -28.8% 6.82 kg / 15.04 lbs
6821.0 g / 66.9 N
Classic neodymiums lose parameters above the temperature limit. Protect against heat – heat can irreversibly damage this product. With increasing heat, the neodymium's capacity momentarily decreases. Avoid using this product close to heaters exceeding its operating temperature limit. Too high temperature will lead to destruction of magnetism.
*Important note: Heat tolerance is determined by both grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress than long magnets. Red status in the table points to permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 20x35 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 68.69 kg / 151.44 lbs
6 132 Gs
10.30 kg / 22.72 lbs
10304 g / 101.1 N
 N/A
1 mm 62.01 kg / 136.70 lbs
11 316 Gs
9.30 kg / 20.50 lbs
9301 g / 91.2 N
 55.81 kg / 123.03 lbs
~0 Gs
2 mm 55.58 kg / 122.53 lbs
10 714 Gs
8.34 kg / 18.38 lbs
8337 g / 81.8 N
 50.02 kg / 110.28 lbs
~0 Gs
3 mm 49.59 kg / 109.32 lbs
10 120 Gs
7.44 kg / 16.40 lbs
7438 g / 73.0 N
 44.63 kg / 98.39 lbs
~0 Gs
5 mm 38.99 kg / 85.96 lbs
8 974 Gs
5.85 kg / 12.89 lbs
5849 g / 57.4 N
 35.09 kg / 77.37 lbs
~0 Gs
10 mm 20.36 kg / 44.88 lbs
6 484 Gs
3.05 kg / 6.73 lbs
3054 g / 30.0 N
 18.32 kg / 40.40 lbs
~0 Gs
20 mm 5.39 kg / 11.88 lbs
3 337 Gs
0.81 kg / 1.78 lbs
809 g / 7.9 N
 4.85 kg / 10.70 lbs
~0 Gs
50 mm 0.25 kg / 0.55 lbs
718 Gs
0.04 kg / 0.08 lbs
37 g / 0.4 N
 0.22 kg / 0.50 lbs
~0 Gs
60 mm 0.12 kg / 0.26 lbs
492 Gs
0.02 kg / 0.04 lbs
18 g / 0.2 N
 0.11 kg / 0.23 lbs
~0 Gs
70 mm 0.06 kg / 0.13 lbs
352 Gs
0.01 kg / 0.02 lbs
9 g / 0.1 N
 0.05 kg / 0.12 lbs
~0 Gs
80 mm 0.03 kg / 0.07 lbs
261 Gs
0.00 kg / 0.01 lbs
5 g / 0.0 N
 0.03 kg / 0.07 lbs
~0 Gs
90 mm 0.02 kg / 0.04 lbs
200 Gs
0.00 kg / 0.01 lbs
3 g / 0.0 N
 0.02 kg / 0.04 lbs
~0 Gs
100 mm 0.01 kg / 0.03 lbs
156 Gs
0.00 kg / 0.00 lbs
2 g / 0.0 N
 0.01 kg / 0.02 lbs
~0 Gs
Two magnets attract each other from a significantly greater distance than a neodymium and metal setup. Such a system of magnet-to-magnet generates a stronger field and a further horizon of performance. Designing a solid fastener? Utilize two neodymiums instead of one magnet and a steel. Exercise caution that when attracting two neodymiums, the collision energy is massive. The repulsion force is a bit weaker than the attraction, but still impressive.
*Field value in repulsion mode is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).
Important: Figures show sliding force of two same magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Hazards (electronics) - precautionary measures
MW 20x35 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 15.0 cm
Hearing aid 10 Gs (1.0 mT) 11.5 cm
Timepiece 20 Gs (2.0 mT) 9.0 cm
Phone / Smartphone 40 Gs (4.0 mT) 7.0 cm
Car key 50 Gs (5.0 mT) 6.5 cm
Payment card 400 Gs (40.0 mT) 2.5 cm
HDD hard drive 600 Gs (60.0 mT) 2.0 cm
A strong magnetic field is a serious hazard to electronics and pacemakers. These neodymiums produce a flux that prevents correct functioning of sensitive medical devices. Be aware: the unseen radiation acts through matter and housings. Special caution must be taken by people with cochlear implants and drug dispensers. Also at risk are: mechanical watches, remotes, speakers, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (cracking risk) - collision effects
MW 20x35 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 10.58 km/h
(2.94 m/s)
 0.36 J
30 mm 11.05 km/h
(3.07 m/s)
 0.39 J
50 mm 11.07 km/h
(3.07 m/s)
 0.39 J
100 mm 11.07 km/h
(3.07 m/s)
 0.39 J
Magnetic elements are prone to chipping – a violent impact against metal can result in shattering. Control the attraction moment – a magnet released freely turns into a projectile. Kinetic force can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during mounting so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the magnet. Wear safety glasses when working with powerful specimens.

Table 9: Surface protection spec
MW 20x35 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Note the thickness of the protective layer.

Table 10: Construction data (Pc)
MW 20x35 / N38

Parameter Value SI Unit / Description
Magnetic Flux 20 408 Mx 204.1 µWb
Pc Coefficient 1.16 High (Stable)
Total magnetic flux passing through the pole surface. Essential parameter in coil applications and motors. The Pc coefficient determines the working geometry.

Table 11: Submerged application
MW 20x35 / N38

Environment Effective steel pull Effect
Air (land) 9.58 kg Standard
Water (riverbed) 10.97 kg
(+1.39 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

*Caution: On a vertical surface, the magnet retains merely a fraction of its max power.

2. Steel saturation

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

3. Temperature resistance

*For N38 material, the safety limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 1.16

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%

Environmental data

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010043-2026
Magnet Unit Converter

Force (pull)

Field Strength

Just complete one field, and the calculator compute the rest for you.

Check out more proposals

MW 10x1.5 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 10x1.5 / N38 - cylindrical magnet

0.431 zł brutto / pcs
SM 25x125 [2xM8] / N42 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x125 [2xM8] / N42 - magnetic separator

393.60 zł brutto / pcs
MPL 5x4x1 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 5x4x1 / N38 - lamellar magnet

0.1845 zł brutto / pcs
MW 15x4 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 15x4 / N38 - cylindrical magnet

1.968 zł brutto / pcs
The presented product is a very strong cylinder magnet, composed of durable NdFeB material, which, at dimensions of Ø20x35 mm, guarantees optimal power. This specific item features high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 9.58 kg), this product is in stock from our European logistics center, ensuring quick order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building electric motors, advanced Hall effect sensors, and efficient filters, where maximum induction on a small surface counts. Thanks to the pull force of 93.97 N with a weight of only 82.47 g, this rod is indispensable in electronics and wherever low weight is crucial.
Due to the delicate structure of the ceramic sinter, you must not use force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure long-term durability in automation, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.
Grade N38 is the most popular standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø20x35), 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 20 mm and height 35 mm. The key parameter here is the holding force amounting to approximately 9.58 kg (force ~93.97 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
This cylinder is magnetized axially (along the height of 35 mm), which means that the N and S poles are located on the flat, circular surfaces. 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 diametrically if your project requires it.

Strengths and weaknesses of rare earth magnets.

Benefits

Besides their durability, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for nearly ten years – the loss is just ~1% (according to analyses),
  • Magnets perfectly defend themselves against demagnetization caused by ambient magnetic noise,
  • A magnet with a smooth nickel surface has an effective appearance,
  • The surface of neodymium magnets generates a intense magnetic field – this is one of their assets,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • In view of the possibility of flexible shaping and adaptation to custom needs, neodymium magnets can be manufactured in a broad palette of geometric configurations, which amplifies use scope,
  • Key role in electronics industry – they are used in data components, electric drive systems, advanced medical instruments, also industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Problematic aspects of neodymium magnets and ways of using them
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
  • 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We recommend cover - magnetic mount, due to difficulties in creating nuts inside the magnet and complex forms.
  • Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small components of these products can complicate diagnosis medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is a challenge,

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what contributes to it?

Information about lifting capacity was defined for the most favorable conditions, including:
  • using a base made of high-permeability steel, acting as a ideal flux conductor
  • whose transverse dimension reaches at least 10 mm
  • with an polished touching surface
  • under conditions of gap-free contact (metal-to-metal)
  • for force applied at a right angle (pull-off, not shear)
  • in neutral thermal conditions

Magnet lifting force in use – key factors

Holding efficiency impacted by working environment parameters, mainly (from most important):
  • Air gap (betwixt the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
  • Load vector – highest force is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be escaped to the other side.
  • Steel type – mild steel attracts best. Higher carbon content reduce magnetic properties and holding force.
  • Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Beware of splinters

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Protect data

Avoid bringing magnets near a purse, computer, or TV. The magnetic field can permanently damage these devices and erase data from cards.

Mechanical processing

Powder produced during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

No play value

NdFeB magnets are not suitable for play. Eating a few magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates urgent medical intervention.

Handling guide

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

Do not overheat magnets

Watch the temperature. Heating the magnet to high heat will permanently weaken its properties and strength.

Life threat

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Threat to navigation

An intense magnetic field interferes with the operation of compasses in smartphones and navigation systems. Maintain magnets near a smartphone to prevent damaging the sensors.

Crushing force

Danger of trauma: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Allergic reactions

Studies show that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, avoid touching magnets with bare hands or select coated magnets.

Danger! Need more info? Read our article: Why are neodymium magnets dangerous?