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MW 20x2.5 / N38 - cylindrical magnet

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010042

GTIN/EAN: 5906301810414

5.00

Diameter Ø

20 mm [±0,1 mm]

Height

2.5 mm [±0,1 mm]

Weight

5.89 g

Magnetization Direction

↑ axial

Load capacity

2.41 kg / 23.65 N

Magnetic Induction

150.34 mT / 1503 Gs

Coating

[NiCuNi] Nickel

check properties »

2.51 ZŁ with VAT / pcs + price for transport

2.04 ZŁ net + 23% VAT / pcs

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Force as well as form of magnets can be analyzed using our force calculator.

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Technical specification - MW 20x2.5 / N38 - cylindrical magnet

Specification / characteristics - MW 20x2.5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010042
GTIN/EAN	5906301810414
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	2.5 mm [±0,1 mm]
Weight	5.89 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.41 kg / 23.65 N
Magnetic Induction ~ ?	150.34 mT / 1503 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x2.5 / N38 - cylindrical 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

properties	values	units
Vickers hardness	≥550	Hv
Density	≥7.4	g/cm³
Curie Temperature TC	312 - 380	°C
Curie Temperature TF	593 - 716	°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

Physical modeling of the assembly - data

These information are the outcome of a engineering simulation. Results were calculated on models for the class Nd₂Fe₁₄B. Actual parameters may differ. Please consider these calculations as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - interaction chart
MW 20x2.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1503 Gs 150.3 mT	2.41 kg / 5.31 lbs 2410.0 g / 23.6 N	strong
1 mm	1431 Gs 143.1 mT	2.18 kg / 4.82 lbs 2184.9 g / 21.4 N	strong
2 mm	1328 Gs 132.8 mT	1.88 kg / 4.15 lbs 1882.0 g / 18.5 N	low risk
3 mm	1206 Gs 120.6 mT	1.55 kg / 3.42 lbs 1552.2 g / 15.2 N	low risk
5 mm	947 Gs 94.7 mT	0.96 kg / 2.11 lbs 957.1 g / 9.4 N	low risk
10 mm	457 Gs 45.7 mT	0.22 kg / 0.49 lbs 223.1 g / 2.2 N	low risk
15 mm	224 Gs 22.4 mT	0.05 kg / 0.12 lbs 53.7 g / 0.5 N	low risk
20 mm	120 Gs 12.0 mT	0.02 kg / 0.03 lbs 15.4 g / 0.2 N	low risk
30 mm	44 Gs 4.4 mT	0.00 kg / 0.00 lbs 2.1 g / 0.0 N	low risk
50 mm	11 Gs 1.1 mT	0.00 kg / 0.00 lbs 0.1 g / 0.0 N	low risk

Grip strength weakens sharply with every mm of gap. Keep in mind that even the smallest gap (e.g., contamination, varnish, dust) strongly diminishes the holding power. Neodymiums work most effectively at the point of direct contact; gap weakens the force. Analyze how flashily the parameters drop, when the product does not adhere tightly to the steel surface. When planning the mounting, eliminate redundant distances.

Table 2: Shear hold (vertical surface)
MW 20x2.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.48 kg / 1.06 lbs 482.0 g / 4.7 N
1 mm	Stal (~0.2)	0.44 kg / 0.96 lbs 436.0 g / 4.3 N
2 mm	Stal (~0.2)	0.38 kg / 0.83 lbs 376.0 g / 3.7 N
3 mm	Stal (~0.2)	0.31 kg / 0.68 lbs 310.0 g / 3.0 N
5 mm	Stal (~0.2)	0.19 kg / 0.42 lbs 192.0 g / 1.9 N
10 mm	Stal (~0.2)	0.04 kg / 0.10 lbs 44.0 g / 0.4 N
15 mm	Stal (~0.2)	0.01 kg / 0.02 lbs 10.0 g / 0.1 N
20 mm	Stal (~0.2)	0.00 kg / 0.01 lbs 4.0 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 estimated shear load sufficient to start the slippage of the magnet down on a vertical steel plate (assuming standard friction). This parameter varies with the separation distance between the magnet and the metal.

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 20x2.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.72 kg / 1.59 lbs 723.0 g / 7.1 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.48 kg / 1.06 lbs 482.0 g / 4.7 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.24 kg / 0.53 lbs 241.0 g / 2.4 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.21 kg / 2.66 lbs 1205.0 g / 11.8 N

When mounting a element on a upright wall (e.g., a fridge), it you can count on only about 20%-30% of its nominal power. Gravitational force and a weak degree of grip cause that products slide down faster than they detach. Planning a vertical fastening? Note that the shear force is noticeably lower than the perpendicular breakaway force. On a smooth steel, the holder will slide down under a much lighter weight. Utilizing a rubberized layer can drastically increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 20x2.5 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.24 kg / 0.53 lbs 241.0 g / 2.4 N
1 mm	25%	0.60 kg / 1.33 lbs 602.5 g / 5.9 N
2 mm	50%	1.21 kg / 2.66 lbs 1205.0 g / 11.8 N
3 mm	75%	1.81 kg / 3.98 lbs 1807.5 g / 17.7 N
5 mm	100%	2.41 kg / 5.31 lbs 2410.0 g / 23.6 N
10 mm	100%	2.41 kg / 5.31 lbs 2410.0 g / 23.6 N
11 mm	100%	2.41 kg / 5.31 lbs 2410.0 g / 23.6 N
12 mm	100%	2.41 kg / 5.31 lbs 2410.0 g / 23.6 N

A thin sheet is not enough to focus the entire magnetic field, which wastes potential of the magnet. Should you mount a strong magnet to a weak sheet, the field will pass right through and the pull force will drop sharply. To squeeze full efficiency of this magnet's potential, you need a suitably thick element of steel. The material oversaturation causes that on sheet metal structures (e.g., thin profiles), the magnet works worse. We suggest choosing the steel thickness according to the table below.

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 20x2.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	2.41 kg / 5.31 lbs 2410.0 g / 23.6 N	OK
40 °C	-2.2%	2.36 kg / 5.20 lbs 2357.0 g / 23.1 N	OK
60 °C	-4.4%	2.30 kg / 5.08 lbs 2304.0 g / 22.6 N
80 °C	-6.6%	2.25 kg / 4.96 lbs 2250.9 g / 22.1 N
100 °C	-28.8%	1.72 kg / 3.78 lbs 1715.9 g / 16.8 N

Ordinary NdFeB products change their properties parameters after exceeding the maximum temperature. Avoid high temperatures – excessive heat can irreversibly destroy this magnet. With increasing heat, the magnet's power momentarily decreases. Refrain from using this magnet in hot environments exceeding its safe range. Exceeding the critical threshold will cause irreversible degradation of magnetic properties.

*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Thin magnets (pancake types) may lose charge permanently under lower heat stress than taller cylinders. Warning indicator in the table indicates permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 20x2.5 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Lateral Force (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	4.38 kg / 9.65 lbs 2 771 Gs	0.66 kg / 1.45 lbs 656 g / 6.4 N	N/A
1 mm	4.20 kg / 9.25 lbs 2 944 Gs	0.63 kg / 1.39 lbs 629 g / 6.2 N	3.78 kg / 8.33 lbs ~0 Gs
2 mm	3.97 kg / 8.75 lbs 2 862 Gs	0.60 kg / 1.31 lbs 595 g / 5.8 N	3.57 kg / 7.87 lbs ~0 Gs
3 mm	3.70 kg / 8.17 lbs 2 766 Gs	0.56 kg / 1.22 lbs 556 g / 5.5 N	3.33 kg / 7.35 lbs ~0 Gs
5 mm	3.12 kg / 6.88 lbs 2 538 Gs	0.47 kg / 1.03 lbs 468 g / 4.6 N	2.81 kg / 6.19 lbs ~0 Gs
10 mm	1.74 kg / 3.83 lbs 1 895 Gs	0.26 kg / 0.57 lbs 261 g / 2.6 N	1.56 kg / 3.45 lbs ~0 Gs
20 mm	0.41 kg / 0.89 lbs 915 Gs	0.06 kg / 0.13 lbs 61 g / 0.6 N	0.36 kg / 0.80 lbs ~0 Gs
50 mm	0.01 kg / 0.02 lbs 140 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
60 mm	0.00 kg / 0.01 lbs 88 Gs	0.00 kg / 0.00 lbs 1 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs
70 mm	0.00 kg / 0.00 lbs 58 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 41 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 29 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 22 Gs	0.00 kg / 0.00 lbs 0 g / 0.0 N	0.00 kg / 0.00 lbs ~0 Gs

Two strong neodymiums interact from a wider radius than a magnet and sheet setup. The setup of two magnets creates a more powerful interaction and a wider radius of performance. Designing a strong closure? Use a pair of magnets instead of one magnet and a striker plate. Remember that when attracting two neodymiums, the pinch force is extreme. The levitation is a bit weaker than the connection force, but still significant.
*Field value for N-N configuration is approximately ~0 Gs in the exact middle of the gap (due to field cancellation).
Attention: Estimates show sliding force of dual matching neodymium magnets (friction ~0.15 for Ni-Ni plating).

Table 7: Protective zones (electronics) - warnings
MW 20x2.5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	7.0 cm
Hearing aid	10 Gs (1.0 mT)	5.5 cm
Timepiece	20 Gs (2.0 mT)	4.5 cm
Phone / Smartphone	40 Gs (4.0 mT)	3.5 cm
Remote	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

Extremely neodym field poses a serious hazard to IT equipment and medical implants. These magnets generate a field that disrupts operation of digital equipment. Be aware: the invisible magnetic field acts through matter and housings. Increased vigilance must be exercised by people with hearing aids and drug dispensers. Influence will be felt by: mechanical watches, car keys, speakers, and screens. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MW 20x2.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	21.55 km/h (5.99 m/s)	0.11 J
30 mm	35.35 km/h (9.82 m/s)	0.28 J
50 mm	45.62 km/h (12.67 m/s)	0.47 J
100 mm	64.51 km/h (17.92 m/s)	0.95 J

NdFeB products are very brittle – a strong collision with metal causes immediate chipping. Watch the impact speed – a magnet released freely speeds with massive force. Striking energy can trigger coating fragments or painful pinches to skin. Be sure to control the product 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 playing with powerful specimens.

Table 9: Coating parameters (durability)
MW 20x2.5 / 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)

For outdoor applications, an epoxy coating is required; standard nickel is intended for indoor use. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 20x2.5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 996 Mx	60.0 µWb
P_c Coefficient	0.19	Low (Flat)

Total magnetic flux passing through the pole surface. Essential parameter when building generators and motors. P_c value defines the magnet's operating point.

Table 11: Hydrostatics and buoyancy
MW 20x2.5 / N38

Environment	Effective steel pull	Effect
Air (land)	2.41 kg	Standard
Water (riverbed)	2.76 kg (+0.35 kg buoyancy gain)	+14.5%

Warning: Standard nickel requires drying after every contact with moisture; lack of maintenance will lead to rust spots.

Water displaces steel, making heavy objects slightly lighter. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Sliding resistance

*Caution: On a vertical wall, the magnet retains merely approx. 20-30% of its nominal pull.

2. Efficiency vs thickness

*Thin metal sheet (e.g. computer case) significantly weakens the holding force.

3. Heat tolerance

*For standard magnets, the max working temp is 80°C.

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.19

The chart above illustrates the magnetic characteristics of the material within the second quadrant of the hysteresis loop. 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 P_c (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 P_c 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

Chemical composition

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

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: 010042-2026

Measurement Calculator

Pulling force

Force in kg

Newtons (N)

lbs

Magnetic Induction

Gauss (Gs)

Tesla (T)

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The presented product is an exceptionally strong rod magnet, composed of advanced NdFeB material, which, with dimensions of Ø20x2.5 mm, guarantees optimal power. The MW 20x2.5 / N38 model boasts a tolerance of ±0.1mm and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 2.41 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating shields it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is perfect for building generators, advanced Hall effect sensors, and efficient magnetic separators, where field concentration on a small surface counts. Thanks to the high power of 23.65 N with a weight of only 5.89 g, this rod is indispensable in miniature devices and wherever low weight is crucial.

Due to the brittleness of the NdFeB material, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this professional component. To ensure stability in automation, specialized industrial adhesives are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Magnets N38 are suitable for the majority of applications in modeling and machine building, where extreme miniaturization with maximum force is not required. If you need the strongest magnets in the same volume (Ø20x2.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

This model is characterized by dimensions Ø20x2.5 mm, which, at a weight of 5.89 g, makes it an element with impressive magnetic energy density. The value of 23.65 N means that the magnet is capable of holding a weight many times exceeding its own mass of 5.89 g. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

This rod magnet is magnetized axially (along the height of 2.5 mm), which means that the N and S poles are located on the flat, circular surfaces. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized through the diameter if your project requires it.

Strengths and weaknesses of rare earth magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
They have excellent resistance to magnetic field loss due to external magnetic sources,
In other words, due to the metallic finish of nickel, the element gains visual value,
Magnets exhibit impressive magnetic induction on the outer layer,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of precise creating and adapting to specific applications,
Huge importance in advanced technology sectors – they find application in HDD drives, electric motors, medical devices, also modern systems.
Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of neodymium magnets:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
We recommend a housing - magnetic holder, due to difficulties in creating threads inside the magnet and complex shapes.
Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small elements of these products can disrupt the diagnostic process medical when they are in the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Best holding force of the magnet in ideal parameters – what it depends on?

The force parameter is a result of laboratory testing executed under specific, ideal conditions:

with the contact of a yoke made of special test steel, ensuring full magnetic saturation
possessing a thickness of minimum 10 mm to avoid saturation
with an ground contact surface
with direct contact (no paint)
during pulling in a direction vertical to the plane
in stable room temperature

Determinants of lifting force in real conditions

Please note that the working load will differ subject to the following factors, starting with the most relevant:

Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Steel grade – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
Temperature – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined with the use of a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safe handling of neodymium magnets

Handling guide

Before starting, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Magnets are brittle

Beware of splinters. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.

Swallowing risk

Absolutely keep magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are life-threatening.

Crushing force

Big blocks can smash fingers instantly. Never place your hand between two attracting surfaces.

Skin irritation risks

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction happens, immediately stop handling magnets and wear gloves.

Safe distance

Powerful magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Implant safety

Life threat: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Fire risk

Combustion risk: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.

Thermal limits

Monitor thermal conditions. Exposing the magnet to high heat will destroy its properties and pulling force.

Keep away from electronics

Note: neodymium magnets generate a field that confuses precision electronics. Keep a separation from your phone, device, and navigation systems.

Warning! Learn more about risks in the article: Magnet Safety Guide.

MW 20x2.5 / N38 - cylindrical magnet

Technical specification - MW 20x2.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical modeling of the assembly - data

Table 1: Static force (pull vs distance) - interaction chart MW 20x2.5 / N38

Table 2: Shear hold (vertical surface) MW 20x2.5 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces MW 20x2.5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection MW 20x2.5 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold MW 20x2.5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range MW 20x2.5 / N38

Table 7: Protective zones (electronics) - warnings MW 20x2.5 / N38

Table 8: Collisions (kinetic energy) - collision effects MW 20x2.5 / N38

Table 9: Coating parameters (durability) MW 20x2.5 / N38

Table 10: Electrical data (Flux) MW 20x2.5 / N38

Table 11: Hydrostatics and buoyancy MW 20x2.5 / N38

1. Sliding resistance

2. Efficiency vs thickness

3. Heat tolerance

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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Magnetic Induction

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Strengths and weaknesses of rare earth magnets.

Benefits

Weaknesses

Lifting parameters

Best holding force of the magnet in ideal parameters – what it depends on?

Determinants of lifting force in real conditions

Safe handling of neodymium magnets

Handling guide

Magnets are brittle

Swallowing risk

Crushing force

Skin irritation risks

Safe distance

Implant safety

Fire risk

Thermal limits

Keep away from electronics

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static force (pull vs distance) - interaction chart
MW 20x2.5 / N38

Table 2: Shear hold (vertical surface)
MW 20x2.5 / N38

Table 3: Wall mounting (sliding) - behavior on slippery surfaces
MW 20x2.5 / N38

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 20x2.5 / N38

Table 5: Thermal resistance (material behavior) - resistance threshold
MW 20x2.5 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field range
MW 20x2.5 / N38

Table 7: Protective zones (electronics) - warnings
MW 20x2.5 / N38

Table 8: Collisions (kinetic energy) - collision effects
MW 20x2.5 / N38

Table 9: Coating parameters (durability)
MW 20x2.5 / N38

Table 10: Electrical data (Flux)
MW 20x2.5 / N38

Table 11: Hydrostatics and buoyancy
MW 20x2.5 / N38