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MW 20x2 / N38 - cylindrical magnet

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

cylindrical magnet

Catalog no 010041

GTIN/EAN: 5906301810407

5.00

Load capacity 1.63 kg / 15.98 N Magnetic Induction 121.57 mT / 1216 Gs

Diameter Ø: 20 mm [±0,1 mm]
Height: 2 mm [±0,1 mm]
Weight: 4.71 g
Magnetization Direction: ↑ axial
Coating: [NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical specifications »

1.690 zł net / pcs

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Frequently asked questions

What is the maximum working temperature of a disc magnet?

Standard N-series grades work up to 80 °C. Grades N50, N52 and N54 have a lower limit of 60 °C, because coercivity falls as BHmax rises. Higher temperatures require the H (120 °C), SH (150 °C), UH (180 °C), EH (200 °C) or AH (230 °C) series. Within the working range the magnet loses about 0.11% of its induction per degree, and that loss is reversible.

What is the difference between N38, N42 and N52?

The number after N is the energy product BHmax. Moving from N38 to N52 raises it by several tens of percent, but the real holding force increases by roughly 20%, because force also depends on geometry and on the magnetic circuit. N52 costs about twice as much as N42, so for most mounting work N38–N42 is the best price-to-force ratio.

What is the dimensional tolerance?

±0.1 mm as standard, ±0.05 mm to order. The tolerance is stated next to the dimensions on every product page.

Guides from the knowledge base

Engineering report for this magnet

Full PDF analysis: pull and shear force, effect of distance, temperature and plate thickness, safety distances and the demagnetization curve.

PDF report Calculator

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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Technical - MW 20x2 / N38 - cylindrical magnet

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

properties

properties	values
Cat. no.	010041
GTIN/EAN	5906301810407
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 mm [±0,1 mm]
Weight	4.71 g
Magnetization Direction	↑ axial
Load capacity ~ ?	1.63 kg / 15.98 N
Magnetic Induction ~ ?	121.57 mT / 1216 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 20x2 / N38 - cylindrical magnet

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

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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 analysis of the magnet - data

These information represent the result of a mathematical calculation. Results were calculated on algorithms for the material Nd₂Fe₁₄B. Real-world conditions may differ from theoretical values. Treat these calculations as a reference point for designers.

Table 1: Static pull force (pull vs distance) - characteristics
MW 20x2 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg/lbs/g/N)	Risk Status
0 mm	1216 Gs 121.6 mT	1.63 kg / 3.59 pounds 1630.0 g / 16.0 N	weak grip
1 mm	1165 Gs 116.5 mT	1.50 kg / 3.30 pounds 1496.3 g / 14.7 N	weak grip
2 mm	1087 Gs 108.7 mT	1.30 kg / 2.87 pounds 1302.7 g / 12.8 N	weak grip
3 mm	991 Gs 99.1 mT	1.08 kg / 2.39 pounds 1083.7 g / 10.6 N	weak grip
5 mm	783 Gs 78.3 mT	0.68 kg / 1.49 pounds 675.9 g / 6.6 N	weak grip
10 mm	379 Gs 37.9 mT	0.16 kg / 0.35 pounds 158.4 g / 1.6 N	weak grip
15 mm	185 Gs 18.5 mT	0.04 kg / 0.08 pounds 37.9 g / 0.4 N	weak grip
20 mm	99 Gs 9.9 mT	0.01 kg / 0.02 pounds 10.8 g / 0.1 N	weak grip
30 mm	36 Gs 3.6 mT	0.00 kg / 0.00 pounds 1.4 g / 0.0 N	weak grip
50 mm	9 Gs 0.9 mT	0.00 kg / 0.00 pounds 0.1 g / 0.0 N	weak grip

Magnetic force weakens sharply per each millimeter of gap. Remember that even the smallest gap (e.g., contamination, paint, dust) significantly weakens the grip. Neodymiums operate strongest at the point of direct contact; distance weakens the power. Observe how quickly the pull force drop, when the product does not touch tightly to the steel surface. When planning the mounting, avoid additional spacers.

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

Distance (mm)	Friction coefficient	Pull Force (kg/lbs/g/N)
0 mm	Stal (~0.2)	0.33 kg / 0.72 pounds 326.0 g / 3.2 N
1 mm	Stal (~0.2)	0.30 kg / 0.66 pounds 300.0 g / 2.9 N
2 mm	Stal (~0.2)	0.26 kg / 0.57 pounds 260.0 g / 2.6 N
3 mm	Stal (~0.2)	0.22 kg / 0.48 pounds 216.0 g / 2.1 N
5 mm	Stal (~0.2)	0.14 kg / 0.30 pounds 136.0 g / 1.3 N
10 mm	Stal (~0.2)	0.03 kg / 0.07 pounds 32.0 g / 0.3 N
15 mm	Stal (~0.2)	0.01 kg / 0.02 pounds 8.0 g / 0.1 N
20 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 2.0 g / 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.00 pounds 0.0 g / 0.0 N

The following data shows the estimated force needed to start the downward movement of the magnet vertically on a vertical steel wall (considering typical friction coefficient). This parameter varies with the distance between the magnet and the surface.

Table 3: Wall mounting (sliding) - vertical pull
MW 20x2 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg/lbs/g/N)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.49 kg / 1.08 pounds 489.0 g / 4.8 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.33 kg / 0.72 pounds 326.0 g / 3.2 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.16 kg / 0.36 pounds 163.0 g / 1.6 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.82 kg / 1.80 pounds 815.0 g / 8.0 N

When hanging a element on a vertical surface (e.g., a car body), it you can count on just about 20%-30% of its nominal power. Gravity as well as a low friction coefficient cause that products slip faster than they pop off the substrate. Want to create a wall mount? Consider that the shear force is much weaker than the perpendicular breakaway force. On a smooth steel, the element will slide down under a much lighter load. Using a rubber layer can effectively increase the grip.

Table 4: Material efficiency (saturation) - power losses
MW 20x2 / N38

Steel thickness (mm)	% power	Real pull force (kg/lbs/g/N)
0.5 mm	10%	0.16 kg / 0.36 pounds 163.0 g / 1.6 N
1 mm	25%	0.41 kg / 0.90 pounds 407.5 g / 4.0 N
2 mm	50%	0.82 kg / 1.80 pounds 815.0 g / 8.0 N
3 mm	75%	1.22 kg / 2.70 pounds 1222.5 g / 12.0 N
5 mm	100%	1.63 kg / 3.59 pounds 1630.0 g / 16.0 N
10 mm	100%	1.63 kg / 3.59 pounds 1630.0 g / 16.0 N
11 mm	100%	1.63 kg / 3.59 pounds 1630.0 g / 16.0 N
12 mm	100%	1.63 kg / 3.59 pounds 1630.0 g / 16.0 N

A thin sheet is not enough to absorb the entire magnetic field, which squanders power of the holder. If you install a neodymium to a thin surface, the field will penetrate right through and the attraction force will be weaker. To utilize the maximum of this neodymium's potential, you need a suitably thick piece of metal. The material oversaturation causes that on thin elements (e.g., appliance housings), the holder shows lower pull force. We advise picking the steel dimension according to the table below.

Table 5: Thermal resistance (stability) - thermal limit
MW 20x2 / N38

Ambient temp. (°C)	Power loss	Remaining pull (kg/lbs/g/N)	Status
20 °C	0.0%	1.63 kg / 3.59 pounds 1630.0 g / 16.0 N	OK
40 °C	-2.2%	1.59 kg / 3.51 pounds 1594.1 g / 15.6 N	OK
60 °C	-4.4%	1.56 kg / 3.44 pounds 1558.3 g / 15.3 N
80 °C	-6.6%	1.52 kg / 3.36 pounds 1522.4 g / 14.9 N
100 °C	-28.8%	1.16 kg / 2.56 pounds 1160.6 g / 11.4 N

Classic neodymiums irreversibly lose strength above the temperature limit. Avoid high temperatures – high temperature can irreversibly destroy this product. With every degree above norm, the neodymium's power temporarily lowers. Do not use this product near heat sources higher than its working range. Exceeding the critical threshold will result in destruction of magnetism.

*Technical advisory: Thermal stability depends not only on the material grade, as well as the dimension ratios. Thin magnets (low permeance coefficient) may lose charge permanently under lower heat stress than long magnets. Warning indicator in the table points to permanent field degradation for this specific geometry.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 20x2 / N38

Gap (mm)	Attraction (kg/lbs) (N-S)	Shear Strength (kg/lbs/g/N)	Repulsion (kg/lbs) (N-N)
0 mm	2.86 kg / 6.31 pounds 2 301 Gs	0.43 kg / 0.95 pounds 429 g / 4.2 N	N/A
1 mm	2.76 kg / 6.09 pounds 2 388 Gs	0.41 kg / 0.91 pounds 414 g / 4.1 N	2.49 kg / 5.48 pounds ~0 Gs
2 mm	2.63 kg / 5.79 pounds 2 329 Gs	0.39 kg / 0.87 pounds 394 g / 3.9 N	2.36 kg / 5.21 pounds ~0 Gs
3 mm	2.47 kg / 5.44 pounds 2 257 Gs	0.37 kg / 0.82 pounds 370 g / 3.6 N	2.22 kg / 4.89 pounds ~0 Gs
5 mm	2.10 kg / 4.62 pounds 2 081 Gs	0.31 kg / 0.69 pounds 315 g / 3.1 N	1.89 kg / 4.16 pounds ~0 Gs
10 mm	1.19 kg / 2.62 pounds 1 565 Gs	0.18 kg / 0.39 pounds 178 g / 1.7 N	1.07 kg / 2.35 pounds ~0 Gs
20 mm	0.28 kg / 0.61 pounds 758 Gs	0.04 kg / 0.09 pounds 42 g / 0.4 N	0.25 kg / 0.55 pounds ~0 Gs
50 mm	0.01 kg / 0.01 pounds 115 Gs	0.00 kg / 0.00 pounds 1 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
60 mm	0.00 kg / 0.01 pounds 72 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
70 mm	0.00 kg / 0.00 pounds 48 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
80 mm	0.00 kg / 0.00 pounds 33 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
90 mm	0.00 kg / 0.00 pounds 24 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs
100 mm	0.00 kg / 0.00 pounds 18 Gs	0.00 kg / 0.00 pounds 0 g / 0.0 N	0.00 kg / 0.00 pounds ~0 Gs

Two strong neodymiums interact from a much further distance than a magnet and sheet setup. Such a system of two magnets produces a massive flux and a further horizon of operation. Want to build a solid fastener? Use a pair of magnets instead of one magnet and a striker plate. Be careful that when attracting two neodymiums, the collision energy is extreme. The levitation is a bit weaker than the connection force, but still impressive.
*Flux density for N-N configuration is approximately ~0 Gs at the geometric center of the gap (due to field cancellation).
Important: Calculations apply to friction force of two identical magnets (friction ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (electronics) - precautionary measures
MW 20x2 / 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
Phone / Smartphone	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)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

A strong magnetic field is a serious hazard to electronic devices and pacemakers. These neodymiums produce a flux that prevents correct functioning of sensitive medical devices. Remember: the unseen radiation acts through matter and plastic. Exceptional care must be exercised by people with cochlear implants and drug dispensers. 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
MW 20x2 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	20.42 km/h (5.67 m/s)	0.08 J
30 mm	21.15 km/h (5.88 m/s)	0.08 J
50 mm	21.16 km/h (5.88 m/s)	0.08 J
100 mm	21.16 km/h (5.88 m/s)	0.08 J

NdFeB products are delicate – a collision with steel causes immediate chipping. Watch the impact speed – a neodymium left loose becomes dangerous. Kinetic force can cause material chips or injury to skin. Hold the magnet firmly during bringing near metal so it doesn't hit violently against the metal. A contact at a velocity of dozens of km/h means shattering of the neodymium. Use safety goggles when playing with powerful specimens.

Table 9: Anti-corrosion coating durability
MW 20x2 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Construction data (P_c)
MW 20x2 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	5 038 Mx	50.4 µWb
P_c Coefficient	0.16	Low (Flat)

Flux value emitted by the magnet pole. Essential parameter when building generators as well as sensors. The P_c coefficient defines the working geometry.

Table 11: Physics of underwater searching
MW 20x2 / N38

Environment	Effective steel pull	Effect
Air (land)	1.63 kg	Standard
Water (riverbed)	1.87 kg (+0.24 kg buoyancy gain)	+14.5%

Rust risk: 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. Buoyancy helps in lifting finds.

1. Wall mount (shear)

*Caution: On a vertical wall, the magnet retains only approx. 20-30% of its perpendicular strength.

2. Steel saturation

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

3. Thermal stability

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

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

chart generated for the permeance coefficient P_c (Permeance Coefficient) = 0.16

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 and environmental data

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%

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: 010041-2026

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MW 8x8 / N38 - cylindrical magnet

1.341 zł brutto / pcs

The presented product is an incredibly powerful cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø20x2 mm, guarantees optimal power. The MW 20x2 / N38 component is characterized by high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding engineers and designers. As a cylindrical magnet with impressive force (approx. 1.63 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Additionally, its Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

It finds application in modeling, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 15.98 N with a weight of only 4.71 g, this rod is indispensable in electronics and wherever low weight is crucial.

Since our magnets have a very precise dimensions, the best method is to glue them into holes with a slightly larger diameter (e.g., 20.1 mm) using epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and operational stability. If you need even stronger magnets in the same volume (Ø20x2), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our warehouse.

This model is characterized by dimensions Ø20x2 mm, which, at a weight of 4.71 g, makes it an element with impressive magnetic energy density. The key parameter here is the holding force amounting to approximately 1.63 kg (force ~15.98 N), which, with such defined dimensions, proves the high power of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.

This cylinder is magnetized axially (along the height of 2 mm), which means that the N and S poles are located on the flat, circular surfaces. Such an arrangement is most desirable when connecting magnets in stacks (e.g., in filters) or when mounting in sockets at the bottom of a hole. On request, we can also produce versions magnetized diametrically if your project requires it.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:

They retain magnetic properties for nearly ten years – the loss is just ~1% (in theory),
Neodymium magnets are characterized by remarkably resistant to magnetic field loss caused by external interference,
The use of an aesthetic finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
Thanks to modularity in constructing and the ability to customize to complex applications,
Universal use in advanced technology sectors – they are utilized in computer drives, electric motors, diagnostic systems, as well as complex engineering applications.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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 suggest using waterproof magnets e.g. in rubber, plastic
Due to limitations in realizing threads and complex shapes in magnets, we propose using casing - magnetic mechanism.
Possible danger to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Highest magnetic holding force – what contributes to it?

Magnet power was determined for optimal configuration, taking into account:

using a sheet made of low-carbon steel, acting as a magnetic yoke
whose transverse dimension equals approx. 10 mm
characterized by smoothness
under conditions of ideal adhesion (surface-to-surface)
for force applied at a right angle (pull-off, not shear)
at temperature room level

Determinants of practical lifting force of a magnet

During everyday use, the real power is determined by a number of factors, listed from crucial:

Distance (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) can cause a reduction in force by up to 50% (this also applies to paint, corrosion or dirt).
Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
Material composition – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
Plate texture – smooth surfaces ensure maximum contact, which increases force. Rough surfaces reduce efficiency.
Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.

Holding force was measured on a smooth steel plate 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 75%. In addition, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

H&S for magnets

Permanent damage

Watch the temperature. Heating the magnet to high heat will ruin its magnetic structure and strength.

Physical harm

Watch your fingers. Two powerful magnets will join immediately with a force of several hundred kilograms, destroying everything in their path. Exercise extreme caution!

Beware of splinters

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. Eye protection is mandatory.

Handling guide

Handle magnets with awareness. Their huge power can shock even professionals. Plan your moves and respect their power.

Electronic hazard

Device Safety: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Keep away from electronics

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

Skin irritation risks

A percentage of the population suffer from a sensitization to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching can result in dermatitis. We suggest use protective gloves.

Dust explosion hazard

Powder created during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Choking Hazard

These products are not toys. Eating multiple magnets can lead to them connecting inside the digestive tract, which poses a critical condition and necessitates immediate surgery.

ICD Warning

People with a pacemaker should keep an large gap from magnets. The magnetism can stop the operation of the life-saving device.

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

MW 20x2 / N38 - cylindrical magnet

Technical - MW 20x2 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the magnet - data

Table 1: Static pull force (pull vs distance) - characteristics MW 20x2 / N38

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

Table 3: Wall mounting (sliding) - vertical pull MW 20x2 / N38

Table 4: Material efficiency (saturation) - power losses MW 20x2 / N38

Table 5: Thermal resistance (stability) - thermal limit MW 20x2 / N38

Table 6: Magnet-Magnet interaction (repulsion) - field collision MW 20x2 / N38

Table 7: Safety (HSE) (electronics) - precautionary measures MW 20x2 / N38

Table 8: Impact energy (kinetic energy) - warning MW 20x2 / N38

Table 9: Anti-corrosion coating durability MW 20x2 / N38

Table 10: Construction data (Pc) MW 20x2 / N38

Table 11: Physics of underwater searching MW 20x2 / N38

1. Wall mount (shear)

2. Steel saturation

3. Thermal stability

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

Elemental analysis

Environmental data

Force (pull)

Magnetic Field

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MW 8x8 / N38 - cylindrical magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Strengths

Weaknesses

Holding force characteristics

Highest magnetic holding force – what contributes to it?

Determinants of practical lifting force of a magnet

H&S for magnets

Permanent damage

Physical harm

Beware of splinters

Handling guide

Electronic hazard

Keep away from electronics

Skin irritation risks

Dust explosion hazard

Choking Hazard

ICD Warning

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs distance) - characteristics
MW 20x2 / N38

Table 2: Shear hold (vertical surface)
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Table 3: Wall mounting (sliding) - vertical pull
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Table 4: Material efficiency (saturation) - power losses
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Table 5: Thermal resistance (stability) - thermal limit
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Table 6: Magnet-Magnet interaction (repulsion) - field collision
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Table 7: Safety (HSE) (electronics) - precautionary measures
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Table 8: Impact energy (kinetic energy) - warning
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Table 9: Anti-corrosion coating durability
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Table 10: Construction data (P_c)
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Table 11: Physics of underwater searching
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Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.