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

MPL 20x8x4 / N38 - lamellar magnet

lamellar magnet

Catalog no 020133

GTIN/EAN: 5906301811398

5.00
Load capacity 4.79 kg / 46.98 N Magnetic Induction 336.99 mT / 3370 Gs
length
20 mm [±0,1 mm]
Width
8 mm [±0,1 mm]
Height
4 mm [±0,1 mm]
Weight
4.8 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

view parameters »

2.98 zł net / pcs

3.67 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
2.98 zł
3.67 zł
price from 250 pcs
2.80 zł
3.45 zł
price from 850 pcs
2.62 zł
3.23 zł

Frequently asked questions

How much will a block magnet really hold?
The catalogue force is measured in full contact with smooth steel at least 10 mm thick, pulled perpendicular, at about 20 °C. On 1 mm sheet about 50% of that value remains, on 0.5 mm about 25%. Mounted on a vertical wall the realistic figure is 20–30%, because the load is then in shear rather than in tension.
What is the maximum working temperature?
Standard N-series grades up to 80 °C, and N50, N52 and N54 up to 60 °C. Above the maximum working temperature the loss stops being reversible. The Curie temperature, at which magnetic properties are lost completely, is about 310 °C.
What safety factor should I allow?
At least twice the mass of the item, and three to five times for vertical mounting. The margin covers sheet thickness, surface condition, any layer of paint or rust, and vibration.

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!

Product card - MPL 20x8x4 / N38 - lamellar magnet

Specification / characteristics - MPL 20x8x4 / N38 - lamellar magnet

properties
properties values
Cat. no. 020133
GTIN/EAN 5906301811398
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
length 20 mm [±0,1 mm]
Width 8 mm [±0,1 mm]
Height 4 mm [±0,1 mm]
Weight 4.8 g
Magnetization Direction ↑ axial
Load capacity ~ ? 4.79 kg / 46.98 N
Magnetic Induction ~ ? 336.99 mT / 3370 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 20x8x4 / N38 - lamellar 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 - technical parameters

Presented data constitute the outcome of a mathematical simulation. Values rely on algorithms for the material Nd2Fe14B. Actual conditions might slightly differ. Treat these calculations as a reference point for designers.

Table 1: Static force (force vs distance) - power drop
MPL 20x8x4 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 3368 Gs
336.8 mT
 4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
 strong
1 mm 2818 Gs
281.8 mT
 3.35 kg / 7.39 lbs
3352.3 g / 32.9 N
 strong
2 mm 2266 Gs
226.6 mT
 2.17 kg / 4.78 lbs
2167.6 g / 21.3 N
 strong
3 mm 1794 Gs
179.4 mT
 1.36 kg / 3.00 lbs
1358.6 g / 13.3 N
 low risk
5 mm 1130 Gs
113.0 mT
 0.54 kg / 1.19 lbs
538.9 g / 5.3 N
 low risk
10 mm 416 Gs
41.6 mT
 0.07 kg / 0.16 lbs
73.0 g / 0.7 N
 low risk
15 mm 187 Gs
18.7 mT
 0.01 kg / 0.03 lbs
14.7 g / 0.1 N
 low risk
20 mm 97 Gs
9.7 mT
 0.00 kg / 0.01 lbs
4.0 g / 0.0 N
 low risk
30 mm 35 Gs
3.5 mT
 0.00 kg / 0.00 lbs
0.5 g / 0.0 N
 low risk
50 mm 9 Gs
0.9 mT
 0.00 kg / 0.00 lbs
0.0 g / 0.0 N
 low risk
Magnetic force decreases significantly per each millimeter of gap. Note that even a very thin break (e.g., contamination, paint, veneer) noticeably weakens the grip. Magnets hold most effectively in perfect adhesion; distance drastically cuts the force. See how rapidly the parameters drop, when the product does not touch flatly to the steel surface. When calculating the mounting, avoid redundant distances.

Table 2: Vertical force (vertical surface)
MPL 20x8x4 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.96 kg / 2.11 lbs
958.0 g / 9.4 N
1 mm Stal (~0.2) 0.67 kg / 1.48 lbs
670.0 g / 6.6 N
2 mm Stal (~0.2) 0.43 kg / 0.96 lbs
434.0 g / 4.3 N
3 mm Stal (~0.2) 0.27 kg / 0.60 lbs
272.0 g / 2.7 N
5 mm Stal (~0.2) 0.11 kg / 0.24 lbs
108.0 g / 1.1 N
10 mm Stal (~0.2) 0.01 kg / 0.03 lbs
14.0 g / 0.1 N
15 mm Stal (~0.2) 0.00 kg / 0.00 lbs
2.0 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 table below presents the theoretical weight limit required to start the slippage of the magnet down along a vertical steel wall (considering typical friction coefficient). This value depends on the gap size between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 20x8x4 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
1.44 kg / 3.17 lbs
1437.0 g / 14.1 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.96 kg / 2.11 lbs
958.0 g / 9.4 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.48 kg / 1.06 lbs
479.0 g / 4.7 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
2.40 kg / 5.28 lbs
2395.0 g / 23.5 N
When mounting a element on a vertical plane (e.g., a board), it will only hold barely about 20%-30% of its maximum pull force. Gravitational force as well as a low friction coefficient cause that holders slide down faster than they pop off the substrate. Designing a vertical fastening? Note that the sliding force is much weaker than the perpendicular breakaway force. On a slippery surface, the element will give way down under a significantly smaller cargo. Using a rubber coating can effectively raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MPL 20x8x4 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.48 kg / 1.06 lbs
479.0 g / 4.7 N
1 mm
25%
 1.20 kg / 2.64 lbs
1197.5 g / 11.7 N
2 mm
50%
 2.40 kg / 5.28 lbs
2395.0 g / 23.5 N
3 mm
75%
 3.59 kg / 7.92 lbs
3592.5 g / 35.2 N
5 mm
100%
 4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
10 mm
100%
 4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
11 mm
100%
 4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
12 mm
100%
 4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
A thin sheet is not enough to conduct the entire magnetic field, which wastes potential of the magnet. If you mount a strong magnet to a thin surface, the field will pass right through and the pull force will drop sharply. To utilize full efficiency of this neodymium's potential, you need a suitably thick element of metal. The saturation effect causes that on thin elements (e.g., thin profiles), 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) - power drop
MPL 20x8x4 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 4.79 kg / 10.56 lbs
4790.0 g / 47.0 N
 OK
40 °C -2.2% 4.68 kg / 10.33 lbs
4684.6 g / 46.0 N
 OK
60 °C -4.4% 4.58 kg / 10.10 lbs
4579.2 g / 44.9 N
80 °C -6.6% 4.47 kg / 9.86 lbs
4473.9 g / 43.9 N
100 °C -28.8% 3.41 kg / 7.52 lbs
3410.5 g / 33.5 N
Classic neodymiums lose power past the thermal threshold. Watch out for overheating – heat can permanently demagnetize this product. With every degree above norm, the neodymium's power briefly drops. Avoid using this product near heat sources exceeding its operating temperature limit. Too high temperature will result in permanent loss of magnetic properties.
*Engineering note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low Pc) may lose charge permanently 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 range
MPL 20x8x4 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Shear Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 11.19 kg / 24.67 lbs
4 784 Gs
1.68 kg / 3.70 lbs
1678 g / 16.5 N
 N/A
1 mm 9.49 kg / 20.93 lbs
6 205 Gs
1.42 kg / 3.14 lbs
1424 g / 14.0 N
 8.54 kg / 18.84 lbs
~0 Gs
2 mm 7.83 kg / 17.26 lbs
5 635 Gs
1.17 kg / 2.59 lbs
1175 g / 11.5 N
 7.05 kg / 15.54 lbs
~0 Gs
3 mm 6.34 kg / 13.97 lbs
5 069 Gs
0.95 kg / 2.10 lbs
951 g / 9.3 N
 5.70 kg / 12.57 lbs
~0 Gs
5 mm 4.02 kg / 8.85 lbs
4 035 Gs
0.60 kg / 1.33 lbs
602 g / 5.9 N
 3.61 kg / 7.97 lbs
~0 Gs
10 mm 1.26 kg / 2.78 lbs
2 259 Gs
0.19 kg / 0.42 lbs
189 g / 1.9 N
 1.13 kg / 2.50 lbs
~0 Gs
20 mm 0.17 kg / 0.38 lbs
832 Gs
0.03 kg / 0.06 lbs
26 g / 0.3 N
 0.15 kg / 0.34 lbs
~0 Gs
50 mm 0.00 kg / 0.01 lbs
112 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
70 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
46 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
32 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
23 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
17 Gs
0.00 kg / 0.00 lbs
0 g / 0.0 N
 0.00 kg / 0.00 lbs
~0 Gs
Two strong neodymiums attract each other from a wider radius than a magnet and sheet combination. Such a system of two magnets generates a stronger field and a wider radius of performance. Want to build a solid fastener? Utilize two neodymiums instead of one magnet and a striker plate. Be careful that when connecting a pair of magnets, the impact force is huge. The repulsion force is slightly lower than the attraction, but still significant.
*Field value between like poles drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).
Attention: Estimates demonstrate friction force of dual identical neodymium magnets (friction coefficient ~0.15 for Ni-Ni plating).

Table 7: Safety (HSE) (electronics) - precautionary measures
MPL 20x8x4 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 6.5 cm
Hearing aid 10 Gs (1.0 mT) 5.0 cm
Timepiece 20 Gs (2.0 mT) 4.0 cm
Mobile device 40 Gs (4.0 mT) 3.0 cm
Car key 50 Gs (5.0 mT) 3.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.0 cm
Powerful magnet radiation poses a real danger to electronics and pacemakers. These neodymiums generate a field that destroys function of digital equipment. Notice: the unseen radiation acts through matter and glass. Special caution must be exercised by people with hearing aids and insulin pumps. The risk also applies to: mechanical watches, car keys, membranes, and screens. Avoid contact with magnetic cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MPL 20x8x4 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.61 km/h
(6.84 m/s)
 0.11 J
30 mm 24.86 km/h
(6.91 m/s)
 0.11 J
50 mm 24.86 km/h
(6.91 m/s)
 0.11 J
100 mm 24.87 km/h
(6.91 m/s)
 0.11 J
NdFeB products are delicate – a collision with steel can result in shattering. Pay attention to connection velocity – a magnet released freely speeds with massive force. Impact energy can destroy the magnet 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 collision at high speed ends with a crack of the neodymium. Wear eye protection when handling with large magnets.

Table 9: Corrosion resistance
MPL 20x8x4 / 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)
MPL 20x8x4 / N38

Parameter Value SI Unit / Description
Magnetic Flux 5 277 Mx 52.8 µWb
Pc Coefficient 0.38 Low (Flat)
Total magnetic flux emitted by the pole surface. Key data when building generators and motors. Pc value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MPL 20x8x4 / N38

Environment Effective steel pull Effect
Air (land) 4.79 kg Standard
Water (riverbed) 5.48 kg
(+0.69 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.
In water, the magnet feels stronger thanks to Archimedes' principle. Buoyancy helps in lifting finds.

1. Vertical hold

*Caution: On a vertical wall, the magnet holds merely ~20% of its perpendicular strength.

2. Plate thickness effect

*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) = 0.38

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.

Engineering data and GPSR

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: 020133-2026
Quick Unit Converter

Pulling force

Magnetic Induction

Enter a value in any box, to see the rest convert in real-time.

Other deals

MW 16x9 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 16x9 / N38 - cylindrical magnet

7.36 zł brutto / pcs
SM 28x325 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 28x325 [2xM8] / N52 - magnetic separator

1131.60 zł brutto / pcs
MW 25x5 / N38AH - cylindrical magnet
Product available Ships today (order by 14:00)

MW 25x5 / N38AH - cylindrical magnet

16.68 zł brutto / pcs
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
Model MPL 20x8x4 / N38 features a low profile and professional pulling force, making it a perfect solution for building separators and machines. This rectangular block with a force of 46.98 N is ready for shipment in 24h, allowing for rapid realization of your project. Furthermore, its Ni-Cu-Ni coating protects it against corrosion in standard operating conditions, giving it an aesthetic appearance.
Separating block magnets requires a technique based on sliding (moving one relative to the other), rather than forceful pulling apart. Watch your fingers! Magnets with a force of 4.79 kg can pinch very hard and cause hematomas. Never use metal tools for prying, as the brittle NdFeB material may chip and damage your eyes.
They constitute a key element in the production of wind generators and material handling systems. They work great as fasteners under tiles, wood, or glass. Their rectangular shape facilitates precise gluing into milled sockets in wood or plastic.
Cyanoacrylate glues (super glue type) are good only for small magnets; for larger plates, we recommend resins. For lighter applications or mounting on smooth surfaces, branded foam tape (e.g., 3M VHB) will work, provided the surface is perfectly degreased. Avoid chemically aggressive glues or hot glue, which can demagnetize neodymium (above 80°C).
The magnetic axis runs through the shortest dimension, which is typical for gripper magnets. In practice, this means that this magnet has the greatest attraction force on its main planes (20x8 mm), which is ideal for flat mounting. This is the most popular configuration for block magnets used in separators and holders.
This model is characterized by dimensions 20x8x4 mm, which, at a weight of 4.8 g, makes it an element with impressive energy density. The key parameter here is the holding force amounting to approximately 4.79 kg (force ~46.98 N), which, with such a compact shape, proves the high grade of the material. The product meets the standards for N38 grade magnets.

Pros as well as cons of rare earth magnets.

Strengths

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They have stable power, and over more than ten years their attraction force decreases symbolically – ~1% (according to theory),
  • Magnets effectively resist against loss of magnetization caused by ambient magnetic noise,
  • Thanks to the shimmering finish, the plating of nickel, gold, or silver-plated gives an modern appearance,
  • Magnets have very high magnetic induction on the working surface,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures reaching 230°C and above...
  • Possibility of individual machining as well as adapting to specific conditions,
  • Fundamental importance in future technologies – they are used in computer drives, brushless drives, diagnostic systems, also multitasking production systems.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Cons of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their durability
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using a housing - magnetic mount.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

Maximum lifting capacity of the magnet – what contributes to it?

Information about lifting capacity is the result of a measurement for optimal configuration, assuming:
  • using a sheet made of mild steel, acting as a magnetic yoke
  • with a cross-section of at least 10 mm
  • with a plane free of scratches
  • with total lack of distance (no impurities)
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

Holding efficiency impacted by specific conditions, including (from most important):
  • Distance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – insufficiently thick steel causes magnetic saturation, causing part of the flux to be escaped to the other side.
  • Steel grade – ideal substrate is pure iron steel. Hardened steels may have worse magnetic properties.
  • Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, reducing force.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate reduces the load capacity.

Warnings
Hand protection

Pinching hazard: The pulling power is so great that it can cause hematomas, pinching, and broken bones. Use thick gloves.

Nickel allergy

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands and opt for encased magnets.

Data carriers

Very strong magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Stay away of min. 10 cm.

Pacemakers

Warning for patients: Powerful magnets disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Magnetic interference

Remember: rare earth magnets generate a field that disrupts precision electronics. Keep a separation from your mobile, device, and GPS.

Conscious usage

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

Combustion hazard

Dust generated during machining of magnets is combustible. Do not drill into magnets unless you are an expert.

Material brittleness

Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Heat warning

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

Keep away from children

Neodymium magnets are not toys. Accidental ingestion of a few magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.

Safety First! Want to know more? Check our post: Why are neodymium magnets dangerous?