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

MPL 5x5x1.2 / N38 - lamellar magnet

lamellar magnet

Catalog no 020171

GTIN/EAN: 5906301811770

5.00
Load capacity 0.44 kg / 4.28 N Magnetic Induction 245.17 mT / 2452 Gs
length
5 mm [±0,1 mm]
Width
5 mm [±0,1 mm]
Height
1.2 mm [±0,1 mm]
Weight
0.22 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

view specifications »

0.1500 zł net / pcs

0.1845 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
0.1500 zł
0.1845 zł
price from 4000 pcs
0.1410 zł
0.1734 zł
price from 17000 pcs
0.1320 zł
0.1624 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!

Technical details - MPL 5x5x1.2 / N38 - lamellar magnet

Specification / characteristics - MPL 5x5x1.2 / N38 - lamellar magnet

properties
properties values
Cat. no. 020171
GTIN/EAN 5906301811770
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 5 mm [±0,1 mm]
Width 5 mm [±0,1 mm]
Height 1.2 mm [±0,1 mm]
Weight 0.22 g
Magnetization Direction ↑ axial
Load capacity ~ ? 0.44 kg / 4.28 N
Magnetic Induction ~ ? 245.17 mT / 2452 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MPL 5x5x1.2 / N38 - lamellar magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

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

Engineering modeling of the assembly - data

Presented data are the direct effect of a mathematical simulation. Values rely on algorithms for the class Nd2Fe14B. Operational conditions may deviate from the simulation results. Please consider these calculations as a reference point during assembly planning.

Table 1: Static force (pull vs gap) - interaction chart
MPL 5x5x1.2 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 2450 Gs
245.0 mT
 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
 low risk
1 mm 1739 Gs
173.9 mT
 0.22 kg / 0.49 LBS
221.8 g / 2.2 N
 low risk
2 mm 1054 Gs
105.4 mT
 0.08 kg / 0.18 LBS
81.4 g / 0.8 N
 low risk
3 mm 622 Gs
62.2 mT
 0.03 kg / 0.06 LBS
28.4 g / 0.3 N
 low risk
5 mm 241 Gs
24.1 mT
 0.00 kg / 0.01 LBS
4.3 g / 0.0 N
 low risk
10 mm 45 Gs
4.5 mT
 0.00 kg / 0.00 LBS
0.1 g / 0.0 N
 low risk
15 mm 15 Gs
1.5 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
20 mm 7 Gs
0.7 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
30 mm 2 Gs
0.2 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
50 mm 0 Gs
0.0 mT
 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
 low risk
Grip strength weakens drastically per each millimeter of gap. Remember that every additional insulation layer (e.g., dirt, paint, dust) noticeably diminishes the holding power. Neodymiums work strongest at the point of direct contact; gap drastically cuts the power. Analyze how flashily the parameters drop, when the magnet does not touch directly to the steel surface. When designing the arrangement, avoid redundant distances.

Table 2: Sliding load (wall)
MPL 5x5x1.2 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 0.09 kg / 0.19 LBS
88.0 g / 0.9 N
1 mm Stal (~0.2) 0.04 kg / 0.10 LBS
44.0 g / 0.4 N
2 mm Stal (~0.2) 0.02 kg / 0.04 LBS
16.0 g / 0.2 N
3 mm Stal (~0.2) 0.01 kg / 0.01 LBS
6.0 g / 0.1 N
5 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
10 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
15 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
20 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 LBS
0.0 g / 0.0 N
The following data presents the theoretical holding capacity necessary to cause the shifting of the magnet vertically against a upright steel wall (considering standard friction). The holding force is relative to the air gap between the magnet and the surface.

Table 3: Vertical assembly (sliding) - vertical pull
MPL 5x5x1.2 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
0.13 kg / 0.29 LBS
132.0 g / 1.3 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
0.09 kg / 0.19 LBS
88.0 g / 0.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.04 kg / 0.10 LBS
44.0 g / 0.4 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
0.22 kg / 0.49 LBS
220.0 g / 2.2 N
When hanging a holder on a upright wall (e.g., a fridge), it you can count on just about 1/5 of its maximum pull force. Gravity as well as a low friction coefficient cause that holders move down faster than they pull off. Want to create a hanger? Note that the sliding force is much weaker than the perpendicular breakaway force. On a painted metal, the magnet will slide down under a significantly smaller cargo. Utilizing a rubberized coating can significantly raise the stability.

Table 4: Steel thickness (substrate influence) - power losses
MPL 5x5x1.2 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.04 kg / 0.10 LBS
44.0 g / 0.4 N
1 mm
25%
 0.11 kg / 0.24 LBS
110.0 g / 1.1 N
2 mm
50%
 0.22 kg / 0.49 LBS
220.0 g / 2.2 N
3 mm
75%
 0.33 kg / 0.73 LBS
330.0 g / 3.2 N
5 mm
100%
 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
10 mm
100%
 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
11 mm
100%
 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
12 mm
100%
 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
A too thin steel cannot absorb the entire magnetic field, which wastes potential of the holder. If you install a neodymium to a too thin substrate, the field will pass right through and the holding will be smaller. To squeeze full efficiency of this magnet's power, you require a sufficiently solid piece of steel. The material oversaturation means that on sheet metal structures (e.g., thin profiles), the holder shows lower pull force. We suggest choosing the steel cross-section based on the following data.

Table 5: Thermal resistance (stability) - thermal limit
MPL 5x5x1.2 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 0.44 kg / 0.97 LBS
440.0 g / 4.3 N
 OK
40 °C -2.2% 0.43 kg / 0.95 LBS
430.3 g / 4.2 N
 OK
60 °C -4.4% 0.42 kg / 0.93 LBS
420.6 g / 4.1 N
80 °C -6.6% 0.41 kg / 0.91 LBS
411.0 g / 4.0 N
100 °C -28.8% 0.31 kg / 0.69 LBS
313.3 g / 3.1 N
Ordinary NdFeB products change their properties parameters above the temperature limit. Protect against heat – excessive heat can permanently destroy this magnet. As the temperature rises, the magnet's force temporarily drops. Do not use this magnet close to ovens higher than its working range. Too high temperature will lead to irreversible degradation of magnetism.
*Engineering note: Heat tolerance is determined by both grade, but also on the magnet's shape. Low-profile magnets (pancake types) are more susceptible to demagnetization under lower heat stress compared to rod magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (attraction) - field range
MPL 5x5x1.2 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Sliding Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 0.92 kg / 2.04 LBS
4 027 Gs
0.14 kg / 0.31 LBS
139 g / 1.4 N
 N/A
1 mm 0.70 kg / 1.54 LBS
4 260 Gs
0.10 kg / 0.23 LBS
105 g / 1.0 N
 0.63 kg / 1.39 LBS
~0 Gs
2 mm 0.47 kg / 1.03 LBS
3 478 Gs
0.07 kg / 0.15 LBS
70 g / 0.7 N
 0.42 kg / 0.93 LBS
~0 Gs
3 mm 0.29 kg / 0.63 LBS
2 734 Gs
0.04 kg / 0.10 LBS
43 g / 0.4 N
 0.26 kg / 0.57 LBS
~0 Gs
5 mm 0.10 kg / 0.22 LBS
1 617 Gs
0.02 kg / 0.03 LBS
15 g / 0.1 N
 0.09 kg / 0.20 LBS
~0 Gs
10 mm 0.01 kg / 0.02 LBS
482 Gs
0.00 kg / 0.00 LBS
1 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
20 mm 0.00 kg / 0.00 LBS
90 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
50 mm 0.00 kg / 0.00 LBS
7 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
4 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
3 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
2 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
90 mm 0.00 kg / 0.00 LBS
1 Gs
0.00 kg / 0.00 LBS
0 g / 0.0 N
 0.00 kg / 0.00 LBS
~0 Gs
100 mm 0.00 kg / 0.00 LBS
1 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 much further distance than a magnet and sheet combination. Such a system of magnet-to-magnet produces a massive flux and a further horizon of performance. Want to build a strong closure? Utilize two neodymiums instead of one magnet and a striker plate. Exercise caution that when connecting a pair of magnets, the collision energy is huge. The levitation is slightly lower than the attraction, but still impressive.
*The magnetic induction between like poles is approximately ~0 Gs at the geometric center between the magnets (due to field cancellation).
Note: Figures refer to shear force of a pair of identical neodymium magnets (friction ~0.15 for Ni-Ni coating).

Table 7: Hazards (electronics) - warnings
MPL 5x5x1.2 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 2.5 cm
Hearing aid 10 Gs (1.0 mT) 2.0 cm
Mechanical watch 20 Gs (2.0 mT) 1.5 cm
Mobile device 40 Gs (4.0 mT) 1.5 cm
Remote 50 Gs (5.0 mT) 1.0 cm
Payment card 400 Gs (40.0 mT) 0.5 cm
HDD hard drive 600 Gs (60.0 mT) 0.5 cm
Extremely neodym field is a real danger to electronic devices and pacemakers. These magnets produce a field that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation passes through tissues and glass. Exceptional care must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, hard drives, or precise measuring instruments.

Table 8: Impact energy (kinetic energy) - warning
MPL 5x5x1.2 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 25.39 km/h
(7.05 m/s)
 0.01 J
30 mm 25.39 km/h
(7.05 m/s)
 0.01 J
50 mm 25.36 km/h
(7.05 m/s)
 0.01 J
100 mm 25.40 km/h
(7.06 m/s)
 0.01 J
Neodymium magnets are delicate – a strong collision with metal risks their cracking. Pay attention to connection velocity – a magnet released freely becomes dangerous. Kinetic force can trigger coating fragments or injury 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 neodymium. Wear safety glasses when playing with powerful specimens.

Table 9: Surface protection spec
MPL 5x5x1.2 / 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. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Electrical data (Pc)
MPL 5x5x1.2 / N38

Parameter Value SI Unit / Description
Magnetic Flux 695 Mx 7.0 µWb
Pc Coefficient 0.30 Low (Flat)
Total magnetic flux passing through the magnet pole. Essential parameter when building generators as well as sensors. Pc value determines the working geometry.

Table 11: Submerged application
MPL 5x5x1.2 / N38

Environment Effective steel pull Effect
Air (land) 0.44 kg Standard
Water (riverbed) 0.50 kg
(+0.06 kg buoyancy gain)
+14.5%
Warning: 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. 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 wall, the magnet retains just ~20% of its max power.

2. Steel thickness impact

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

3. Temperature resistance

*For N38 grade, the critical limit is 80°C.

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

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.30

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%

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: 020171-2026
Measurement Calculator

Force (pull)

Magnetic Induction

Input a value in one of the inputs, and all other values change instantly.

Check out also deals

SM 32x100 [2xM8] / N42 - magnetic separator
Product available Ships tomorrow

SM 32x100 [2xM8] / N42 - magnetic separator

492.00 zł brutto / pcs
BM 320x180x70 [4x M8] - magnetic beam
Product available Ships tomorrow

BM 320x180x70 [4x M8] - magnetic beam

3635.14 zł brutto / pcs
MW 40x15 / N38 - cylindrical magnet
Product available Ships tomorrow

MW 40x15 / N38 - cylindrical magnet

65.93 zł brutto / pcs
MPL 5x5x1.5 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 5x5x1.5 / N38 - lamellar magnet

0.1845 zł brutto / pcs
This product is a very powerful magnet in the shape of a plate made of NdFeB material, which, with dimensions of 5x5x1.2 mm and a weight of 0.22 g, guarantees the highest quality connection. As a magnetic bar with high power (approx. 0.44 kg), this product is available off-the-shelf from our warehouse in Poland. The durable anti-corrosion layer ensures a long lifespan in a dry environment, protecting the core from oxidation.
The key to success is sliding the magnets along their largest connection plane (using e.g., the edge of a table), which is easier than trying to tear them apart directly. Watch your fingers! Magnets with a force of 0.44 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.
Plate magnets MPL 5x5x1.2 / N38 are the foundation for many industrial devices, such as magnetic separators and linear motors. Thanks to the flat surface and high force (approx. 0.44 kg), they are ideal as hidden locks in furniture making and mounting elements in automation. 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).
Standardly, the MPL 5x5x1.2 / N38 model is magnetized axially (dimension 1.2 mm), which means that the N and S poles are located on its largest, flat surfaces. Thanks to this, it works best when "sticking" to sheet metal or another magnet with a large surface area. This is the most popular configuration for block magnets used in separators and holders.
The presented product is a neodymium magnet with precisely defined parameters: 5 mm (length), 5 mm (width), and 1.2 mm (thickness). It is a magnetic block with dimensions 5x5x1.2 mm and a self-weight of 0.22 g, ready to work at temperatures up to 80°C. The protective [NiCuNi] coating secures the magnet against corrosion.

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • Their magnetic field remains stable, and after around 10 years it drops only by ~1% (according to research),
  • They are extremely resistant to demagnetization induced by external magnetic fields,
  • By using a reflective coating of gold, the element gains an professional look,
  • Neodymium magnets create maximum magnetic induction on a contact point, which increases force concentration,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to versatility in forming and the ability to adapt to individual projects,
  • Key role in future technologies – they are commonly used in HDD drives, motor assemblies, advanced medical instruments, as well as multitasking production systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Disadvantages

Disadvantages of neodymium magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We suggest casing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
  • Health risk resulting from small fragments of magnets are risky, if swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these products are able to complicate diagnosis medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

Magnetic strength at its maximum – what contributes to it?

Magnet power is the result of a measurement for optimal configuration, taking into account:
  • with the use of a sheet made of low-carbon steel, ensuring maximum field concentration
  • whose transverse dimension equals approx. 10 mm
  • with a plane free of scratches
  • with zero gap (no paint)
  • during detachment in a direction vertical to the plane
  • at temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

In practice, the actual lifting capacity depends on several key aspects, ranked from the most important:
  • Gap (between the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Steel type – low-carbon steel attracts best. Alloy admixtures lower magnetic properties and holding force.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
  • Temperature – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate decreases the holding force.

Safety rules for work with NdFeB magnets
Magnetic media

Avoid bringing magnets near a purse, computer, or screen. The magnetism can irreversibly ruin these devices and erase data from cards.

GPS and phone interference

Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Do not give to children

NdFeB magnets are not intended for children. Eating multiple magnets may result in them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.

Nickel allergy

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop handling magnets and use protective gear.

Operating temperature

Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Do not drill into magnets

Dust generated during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Implant safety

Patients with a ICD have to keep an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Respect the power

Handle magnets consciously. Their huge power can shock even professionals. Be vigilant and respect their force.

Hand protection

Big blocks can smash fingers instantly. Do not place your hand betwixt two strong magnets.

Fragile material

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets leads to them cracking into small pieces.

Important! Looking for details? Read our article: Why are neodymium magnets dangerous?