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

MP 62x42x25 / N38 - ring magnet

ring magnet

Catalog no 030205

GTIN/EAN: 5906301812227

5.00
Load capacity 58.67 kg / 575.60 N Magnetic Induction 389.14 mT / 3891 Gs
Diameter
62 mm [±0,1 mm]
internal diameter Ø
42 mm [±0,1 mm]
Height
25 mm [±0,1 mm]
Weight
306.31 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

check specifications »

138.03 zł net / pcs

169.78 zł with VAT (23% VAT) / pcs

price for transport

99.18 zł net was the lowest price in the last 30 days

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
138.03 zł
169.78 zł
price from 5 pcs
129.75 zł
159.59 zł
price from 20 pcs
121.47 zł
149.40 zł

Frequently asked questions

Where can I compare prices of ring magnets for mounting in Poland?
The DHIT price list and individual product cards show the available ring magnets and their current prices. Compare the outside diameter, hole diameter, height, grade and quantity before ordering.
Are ring magnets resistant to damage?
NdFeB is brittle and may crack on impact or when magnets collide. A coating or suitable housing can provide additional protection, but a screw must not place excessive stress on the magnet. Check the mounting instructions for the selected model.
Which ring magnet is suitable for an outdoor structure?
Check the coating, protection against moisture and the temperature reached at the actual installation site. An unprotected magnet should not be assumed suitable for continuous water exposure. Compare the conditions with the selected product card.
Where can I check the available sizes of neodymium ring magnets?
The category and price list show the dimensions of available models. Each product card gives the outside diameter, inside diameter and height. If a suitable size is missing, ask about a custom version.

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 data - MP 62x42x25 / N38 - ring magnet

Specification / characteristics - MP 62x42x25 / N38 - ring magnet

properties
properties values
Cat. no. 030205
GTIN/EAN 5906301812227
Distributor Dhit sp. z o.o.
Country of origin Poland / China / Germany
Customs code 85059029
Diameter 62 mm [±0,1 mm]
internal diameter Ø 42 mm [±0,1 mm]
Height 25 mm [±0,1 mm]
Weight 306.31 g
Magnetization Direction ↑ axial
Load capacity ~ ? 58.67 kg / 575.60 N
Magnetic Induction ~ ? 389.14 mT / 3891 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MP 62x42x25 / N38 - ring magnet
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 310 °C
Curie Temperature TF 590 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Engineering modeling of the magnet - data

Presented values represent the outcome of a mathematical calculation. Values were calculated on algorithms for the class Nd2Fe14B. Operational parameters might slightly differ. Use these calculations as a preliminary roadmap during assembly planning.

Table 1: Static force (force vs distance) - interaction chart
MP 62x42x25 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3891 Gs
389.1 mT
 58.67 kg / 129.35 pounds
58670.0 g / 575.6 N
 dangerous!
1 mm 3784 Gs
378.4 mT
 55.50 kg / 122.35 pounds
55496.2 g / 544.4 N
 dangerous!
2 mm 3673 Gs
367.3 mT
 52.28 kg / 115.25 pounds
52276.1 g / 512.8 N
 dangerous!
3 mm 3559 Gs
355.9 mT
 49.07 kg / 108.19 pounds
49072.9 g / 481.4 N
 dangerous!
5 mm 3324 Gs
332.4 mT
 42.83 kg / 94.42 pounds
42826.3 g / 420.1 N
 dangerous!
10 mm 2738 Gs
273.8 mT
 29.05 kg / 64.04 pounds
29047.2 g / 285.0 N
 dangerous!
15 mm 2200 Gs
220.0 mT
 18.76 kg / 41.35 pounds
18757.5 g / 184.0 N
 dangerous!
20 mm 1745 Gs
174.5 mT
 11.79 kg / 26.00 pounds
11794.1 g / 115.7 N
 dangerous!
30 mm 1090 Gs
109.0 mT
 4.60 kg / 10.14 pounds
4600.1 g / 45.1 N
 medium risk
50 mm 460 Gs
46.0 mT
 0.82 kg / 1.81 pounds
821.6 g / 8.1 N
 low risk
Grip strength weakens drastically with every mm of spacing. Keep in mind that every additional insulation layer (e.g., contamination, paint, veneer) strongly reduces the pull force. Magnets operate optimally at the point of direct contact; distance nullifies the force. Observe how quickly the load capacity plummet, when the magnet does not touch tightly to the steel surface. When planning the mounting, discard unnecessary gaps.

Table 2: Sliding capacity (wall)
MP 62x42x25 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Raw steel (µ ≈ 0.2) 11.73 kg / 25.87 pounds
11734.0 g / 115.1 N
1 mm Raw steel (µ ≈ 0.2) 11.10 kg / 24.47 pounds
11100.0 g / 108.9 N
2 mm Raw steel (µ ≈ 0.2) 10.46 kg / 23.05 pounds
10456.0 g / 102.6 N
3 mm Raw steel (µ ≈ 0.2) 9.81 kg / 21.64 pounds
9814.0 g / 96.3 N
5 mm Raw steel (µ ≈ 0.2) 8.57 kg / 18.88 pounds
8566.0 g / 84.0 N
10 mm Raw steel (µ ≈ 0.2) 5.81 kg / 12.81 pounds
5810.0 g / 57.0 N
15 mm Raw steel (µ ≈ 0.2) 3.75 kg / 8.27 pounds
3752.0 g / 36.8 N
20 mm Raw steel (µ ≈ 0.2) 2.36 kg / 5.20 pounds
2358.0 g / 23.1 N
30 mm Raw steel (µ ≈ 0.2) 0.92 kg / 2.03 pounds
920.0 g / 9.0 N
50 mm Raw steel (µ ≈ 0.2) 0.16 kg / 0.36 pounds
164.0 g / 1.6 N
This section shows the theoretical weight limit needed to cause the sliding of the magnet vertically along a vertical steel wall (considering typical friction coefficient). The holding force depends on the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - behavior on slippery surfaces
MP 62x42x25 / N38

Surface type Friction coefficient / % Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% of nominal force
17.60 kg / 38.80 pounds
17601.0 g / 172.7 N
Painted steel (standard)
µ = 0.2 20% of nominal force
11.73 kg / 25.87 pounds
11734.0 g / 115.1 N
Oily/slippery steel
µ = 0.1 10% of nominal force
5.87 kg / 12.93 pounds
5867.0 g / 57.6 N
Magnet with anti-slip rubber
µ = 0.5 50% of nominal force
29.34 kg / 64.67 pounds
29335.0 g / 287.8 N
When placing a element on a vertical surface (e.g., a car body), it you can count on barely about 1/5 of its nominal power. Gravity as well as a low friction coefficient influence the fact that holders slip faster than they pop off the substrate. Want to create a hanger? Remember that the sliding force is significantly lower than the perpendicular breakaway force. On a slippery surface, the holder will slide down under a significantly smaller weight. Utilizing a rubberized pad can significantly improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MP 62x42x25 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
3%
 1.96 kg / 4.31 pounds
1955.7 g / 19.2 N
1 mm
8%
 4.89 kg / 10.78 pounds
4889.2 g / 48.0 N
2 mm
17%
 9.78 kg / 21.56 pounds
9778.3 g / 95.9 N
3 mm
25%
 14.67 kg / 32.34 pounds
14667.5 g / 143.9 N
5 mm
42%
 24.45 kg / 53.89 pounds
24445.8 g / 239.8 N
10 mm
83%
 48.89 kg / 107.79 pounds
48891.7 g / 479.6 N
11 mm
92%
 53.78 kg / 118.57 pounds
53780.8 g / 527.6 N
12 mm
100%
 58.67 kg / 129.35 pounds
58670.0 g / 575.6 N
A too thin steel is incapable of take in the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a thin surface, the flux will penetrate right through and the holding will be smaller. To utilize the maximum of this neodymium's potential, you need a suitably thick element of steel. The material oversaturation causes that on thin elements (e.g., car bodies), the holder shows lower pull force. We recommend selecting the steel dimension based on the following data.

Table 5: Thermal stability (stability) - thermal limit
MP 62x42x25 / N38

Magnet temperature (°C) Force change relative to 20°C Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 58.67 kg / 129.35 pounds
58670.0 g / 575.6 N
 Estimate
40 °C -4.4% 56.12 kg / 123.72 pounds
56116.9 g / 550.5 N
 Estimate
60 °C -8.6% 53.62 kg / 118.21 pounds
53620.6 g / 526.0 N
 Estimate
80 °C -12.8% 51.18 kg / 112.83 pounds
51181.1 g / 502.1 N
 Material limit
100 °C — — Out of range — no model
The table estimates the reversible force change relative to 20°C, assuming a Br coefficient of -0.11%/°C and force proportional to Br². This is a simplified model with unchanged contact and geometry, not a measurement. Above the material limit, neither force nor irreversible magnetization loss is predicted.
The temperature limit comes from this product’s material data. Permissible conditions also depend on geometry and the magnetic circuit. Without B-H curves for the specific grade and temperature, Pc alone does not determine irreversible demagnetization. Values within the material range do not guarantee the allowable temperature of the complete assembly.

Table 6: Two magnets (attraction) - field range
MP 62x42x25 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 152.48 kg / 336.16 pounds
5 268 Gs
22.87 kg / 50.42 pounds
22872 g / 224.4 N
 N/A
1 mm 148.41 kg / 327.18 pounds
7 677 Gs
22.26 kg / 49.08 pounds
22261 g / 218.4 N
 133.57 kg / 294.46 pounds
~0 Gs
2 mm 144.23 kg / 317.97 pounds
7 569 Gs
21.63 kg / 47.70 pounds
21635 g / 212.2 N
 129.81 kg / 286.18 pounds
~0 Gs
3 mm 140.05 kg / 308.75 pounds
7 458 Gs
21.01 kg / 46.31 pounds
21007 g / 206.1 N
 126.04 kg / 277.87 pounds
~0 Gs
5 mm 131.69 kg / 290.33 pounds
7 232 Gs
19.75 kg / 43.55 pounds
19753 g / 193.8 N
 118.52 kg / 261.29 pounds
~0 Gs
10 mm 111.30 kg / 245.38 pounds
6 649 Gs
16.70 kg / 36.81 pounds
16695 g / 163.8 N
 100.17 kg / 220.84 pounds
~0 Gs
20 mm 75.49 kg / 166.43 pounds
5 476 Gs
11.32 kg / 24.96 pounds
11324 g / 111.1 N
 67.94 kg / 149.79 pounds
~0 Gs
50 mm 19.11 kg / 42.12 pounds
2 755 Gs
2.87 kg / 6.32 pounds
2866 g / 28.1 N
 17.20 kg / 37.91 pounds
~0 Gs
60 mm 11.96 kg / 26.36 pounds
2 179 Gs
1.79 kg / 3.95 pounds
1793 g / 17.6 N
 10.76 kg / 23.72 pounds
~0 Gs
70 mm 7.57 kg / 16.69 pounds
1 734 Gs
1.14 kg / 2.50 pounds
1136 g / 11.1 N
 6.81 kg / 15.02 pounds
~0 Gs
80 mm 4.87 kg / 10.74 pounds
1 391 Gs
0.73 kg / 1.61 pounds
731 g / 7.2 N
 4.39 kg / 9.67 pounds
~0 Gs
90 mm 3.19 kg / 7.04 pounds
1 126 Gs
0.48 kg / 1.06 pounds
479 g / 4.7 N
 2.88 kg / 6.34 pounds
~0 Gs
100 mm 2.14 kg / 4.71 pounds
921 Gs
0.32 kg / 0.71 pounds
320 g / 3.1 N
 1.92 kg / 4.24 pounds
~0 Gs
Two magnetic products interact from a wider radius than a magnet and sheet setup. Such a system of two magnets produces a massive flux and a wider radius of action. Want to build a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when bringing together two magnets, the collision energy is huge. The levitation is marginally weaker than the connection force, but still impressive.
*Flux density between like poles reaches ~0 Gs at the geometric center between the magnets (resulting from vector opposition).
Important: Figures refer to friction force of a pair of matching magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Axial field levels — not safety zones
MP 62x42x25 / N38

Field level (Gs) mT Model distance (cm)
< 5 Gs < 0.5 mT 30.0 cm
< 10 Gs < 1.0 mT 23.5 cm
< 20 Gs < 2.0 mT 18.5 cm
< 40 Gs < 4.0 mT 14.5 cm
< 50 Gs < 5.0 mT 13.0 cm
< 400 Gs < 40.0 mT 5.5 cm
< 600 Gs < 60.0 mT 4.5 cm
Reference field levels for a model of one magnet, on its axis in air, with a 5 mm distance step. These are not device immunity limits or safe distances for implants. Do not use this table to assess the safety of a pacemaker, defibrillator or other implant; follow the device manufacturer’s and your clinician’s guidance. Steel and other magnets change the field distribution.

Table 8: Collisions (kinetic energy) - collision effects
MP 62x42x25 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 18.93 km/h
(5.26 m/s)
 4.24 J
30 mm 24.13 km/h
(6.70 m/s)
 6.88 J
50 mm 24.86 km/h
(6.90 m/s)
 7.30 J
100 mm 25.04 km/h
(6.96 m/s)
 7.41 J
Magnetic elements are delicate – a collision with steel risks their cracking. Watch the impact speed – a neodymium left loose becomes dangerous. Striking energy can trigger coating fragments or painful pinches to skin. Always hold the magnet during bringing near metal so it doesn't hit with great force against the steel surface. A contact at a velocity of dozens of km/h ends with a crack of the neodymium. Wear safety glasses when playing with large magnets.

Table 9: Coating parameters (durability)
MP 62x42x25 / 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)
MP 62x42x25 / N38

Parameter Value SI Unit / Description
Magnetic Flux 75 511 Mx 755.1 µWb
Pc Coefficient 0.62 High (Stable)
Flux value emitted by the magnet pole. Essential parameter when building generators as well as sensors. The Pc coefficient defines the magnet's operating point.

Table 11: Underwater work (magnet fishing)
MP 62x42x25 / N38

Environment Effective steel pull Effect
Air (land) 58.67 kg Standard
Water (riverbed) 67.18 kg
(+8.51 kg buoyancy gain)
+14.5%
Rust risk: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.
Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

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

2. Steel saturation

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

3. Power loss vs temp

N38: the maximum material working temperature is 80°C. Permitted conditions also depend on the shape and magnetic circuit.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.62

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. At low Pc values (typical for flat magnets, below about 1) 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

Elemental analysis

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: 030205-2026
Measurement Calculator

Pulling force

Magnetic Induction

Simply populate a single box, to let the calculator fill in everything else instantly.

Other offers

MW 5x5 / N38 - cylindrical magnet
Product available Ships tomorrow

MW 5x5 / N38 - cylindrical magnet

0.394 zł brutto / pcs
MP 10x7/3.5x3 / N38 - ring magnet
Product available Ships tomorrow

MP 10x7/3.5x3 / N38 - ring magnet

0.886 zł brutto / pcs
MPL 42x20x5 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 42x20x5 / N38 - lamellar magnet

18.73 zł brutto / pcs
MW 5x1 / N38 - cylindrical magnet
Product available Ships tomorrow

MW 5x1 / N38 - cylindrical magnet

0.1722 zł brutto / pcs
The ring-shaped magnet MP 62x42x25 / N38 is created for permanent mounting, where glue might fail or be insufficient. Mounting is clean and reversible, unlike gluing. This product with a force of 58.67 kg works great as a cabinet closure, speaker holder, or spacer element in devices.
This is a crucial issue when working with model MP 62x42x25 / N38. Neodymium magnets are sintered ceramics, which means they are hard but breakable and inelastic. One turn too many can destroy the magnet, so do it slowly. It's a good idea to use a rubber spacer under the screw head, which will cushion the stresses. Remember: cracking during assembly results from material properties, not a product defect.
Moisture can penetrate micro-cracks in the coating and cause oxidation of the magnet. In the place of the mounting hole, the coating is thinner and can be damaged when tightening the screw, which will become a corrosion focus. If you must use it outside, paint it with anti-corrosion paint after mounting.
A screw or bolt with a thread diameter smaller than 42 mm fits this model. For magnets with a straight hole, a conical head can act like a wedge and burst the magnet. Aesthetic mounting requires selecting the appropriate head size.
The presented product is a ring magnet with dimensions Ø62 mm (outer diameter) and height 25 mm. The key parameter here is the holding force amounting to approximately 58.67 kg (force ~575.60 N). The product has a [NiCuNi] coating and is made of NdFeB material. Inner hole dimension: 42 mm.
The poles are located on the planes with holes, not on the sides of the ring. If you want two such magnets screwed with cones facing each other (faces) to attract, you must connect them with opposite poles (N to S). We do not offer paired sets with marked poles in this category, but they are easy to match manually.

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even over approximately ten years – the reduction in strength is only ~1% (according to tests),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • Thanks to the glossy finish, the plating of nickel, gold, or silver gives an professional appearance,
  • They are known for high magnetic induction at the operating surface, making them more effective,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to freedom in shaping and the capacity to adapt to complex applications,
  • Wide application in advanced technology sectors – they serve a role in computer drives, drive modules, medical devices, also technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Limitations

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
  • Limited ability of producing threads in the magnet and complicated shapes - preferred is cover - mounting mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum lifting capacity of the magnet – what affects it?

The force parameter is a result of laboratory testing performed under the following configuration:
  • with the application of a yoke made of low-carbon steel, guaranteeing maximum field concentration
  • whose transverse dimension reaches at least 10 mm
  • with an polished contact surface
  • with zero gap (without impurities)
  • under axial force direction (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Key elements affecting lifting force

It is worth knowing that the magnet holding may be lower depending on elements below, in order of importance:
  • Distance (betwixt the magnet and the metal), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
  • Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
  • Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

H&S for magnets
Heat warning

Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.

No play value

Strictly keep magnets away from children. Risk of swallowing is high, and the effects of magnets connecting inside the body are tragic.

Life threat

Life threat: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Respect the power

Use magnets consciously. Their powerful strength can shock even professionals. Be vigilant and do not underestimate their power.

Dust is flammable

Mechanical processing of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Shattering risk

Protect your eyes. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Safe distance

Do not bring magnets near a purse, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

GPS Danger

A powerful magnetic field interferes with the functioning of compasses in phones and GPS navigation. Do not bring magnets near a device to prevent breaking the sensors.

Avoid contact if allergic

Certain individuals have a contact allergy to nickel, which is the common plating for NdFeB magnets. Extended handling might lead to an allergic reaction. It is best to use protective gloves.

Pinching danger

Watch your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Be careful!

Security! Looking for details? Check our post: Why are neodymium magnets dangerous?