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MW 8x8 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010106

GTIN: 5906301811053

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

3.02 g

Magnetization Direction

↑ axial

Load capacity

2.03 kg / 19.92 N

Magnetic Induction

553.67 mT / 5537 Gs

Coating

[NiCuNi] Nickel

1.341 ZŁ with VAT / pcs + price for transport

1.090 ZŁ net + 23% VAT / pcs

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Lifting power as well as structure of neodymium magnets can be calculated using our our magnetic calculator.

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MW 8x8 / N38 - cylindrical magnet

Specification / characteristics MW 8x8 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010106
GTIN	5906301811053
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	8 mm [±0,1 mm]
Height	8 mm [±0,1 mm]
Weight	3.02 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.03 kg / 19.92 N
Magnetic Induction ~ ?	553.67 mT / 5537 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x8 / N38 - cylindrical magnet

properties	values	units
remenance Br [Min. - Max.] ?	12.2-12.6	kGs
remenance Br [Min. - Max.] ?	1220-1260	T
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 106	°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 analysis of the product - data

These information are the outcome of a mathematical analysis. Results were calculated on models for the class Nd₂Fe₁₄B. Actual conditions may deviate from the simulation results. Please consider these data as a preliminary roadmap for designers.

Table 1: Static force (pull vs distance) - power drop
MW 8x8 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	5531 Gs 553.1 mT	2.03 kg / 2030.0 g 19.9 N	warning
1 mm	4162 Gs 416.2 mT	1.15 kg / 1149.3 g 11.3 N	low risk
2 mm	2984 Gs 298.4 mT	0.59 kg / 590.7 g 5.8 N	low risk
3 mm	2107 Gs 210.7 mT	0.29 kg / 294.5 g 2.9 N	low risk
5 mm	1084 Gs 108.4 mT	0.08 kg / 78.0 g 0.8 N	low risk
10 mm	296 Gs 29.6 mT	0.01 kg / 5.8 g 0.1 N	low risk
15 mm	118 Gs 11.8 mT	0.00 kg / 0.9 g 0.0 N	low risk
20 mm	58 Gs 5.8 mT	0.00 kg / 0.2 g 0.0 N	low risk
30 mm	20 Gs 2.0 mT	0.00 kg / 0.0 g 0.0 N	low risk
50 mm	5 Gs 0.5 mT	0.00 kg / 0.0 g 0.0 N	low risk

Magnetic force decreases sharply with every subsequent millimeter of spacing. Note that even the smallest gap (e.g., contamination, varnish, dust) strongly diminishes the holding power. Magnets operate strongest at the point of direct contact; distance weakens the force. Observe how rapidly the pull force plummet, when the magnet does not adhere tightly to the metal substrate. When planning the arrangement, eliminate redundant distances.

Table 2: Vertical Force (Wall)
MW 8x8 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.41 kg / 406.0 g 4.0 N
1 mm	Stal (~0.2)	0.23 kg / 230.0 g 2.3 N
2 mm	Stal (~0.2)	0.12 kg / 118.0 g 1.2 N
3 mm	Stal (~0.2)	0.06 kg / 58.0 g 0.6 N
5 mm	Stal (~0.2)	0.02 kg / 16.0 g 0.2 N
10 mm	Stal (~0.2)	0.00 kg / 2.0 g 0.0 N
15 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
20 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
30 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N
50 mm	Stal (~0.2)	0.00 kg / 0.0 g 0.0 N

The following data presents the estimated shear load sufficient to start the shifting of the magnet downwards against a vertical metal surface (assuming typical friction). This value varies with the air gap between the magnet and the surface.

Table 3: Vertical assembly (shearing) - vertical pull
MW 8x8 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.61 kg / 609.0 g 6.0 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.41 kg / 406.0 g 4.0 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.20 kg / 203.0 g 2.0 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.02 kg / 1015.0 g 10.0 N

When hanging a magnet on a vertical surface (e.g., a car body), it will only hold just about 20%-30% of nominal attraction strength. Gravity as well as a low friction coefficient cause that magnets slip easier than they pop off the substrate. Planning a wall mount? Note that the sliding force is noticeably lower than the maximum static pull force. On a smooth steel, the magnet will give way down under a much lighter weight. Using a rubber coating can significantly increase the grip.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 8x8 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.20 kg / 203.0 g 2.0 N
1 mm	25%	0.51 kg / 507.5 g 5.0 N
2 mm	50%	1.02 kg / 1015.0 g 10.0 N
5 mm	100%	2.03 kg / 2030.0 g 19.9 N
10 mm	100%	2.03 kg / 2030.0 g 19.9 N

A too thin steel is unable to conduct the entire magnetic field, which wastes potential of the magnet. If you install a neodymium to a thin surface, the magnetism will pass right through and the attraction force will be weaker. To utilize full efficiency of this magnet's power, you require a sufficiently solid element of steel. The material oversaturation means that on delicate walls (e.g., car bodies), the magnet works worse. We suggest choosing the steel cross-section according to the table below.

Table 5: Working in heat (material behavior) - power drop
MW 8x8 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	2.03 kg / 2030.0 g 19.9 N	OK
40 °C	-2.2%	1.99 kg / 1985.3 g 19.5 N	OK
60 °C	-4.4%	1.94 kg / 1940.7 g 19.0 N	OK
80 °C	-6.6%	1.90 kg / 1896.0 g 18.6 N
100 °C	-28.8%	1.45 kg / 1445.4 g 14.2 N

Standard neodymium magnets irreversibly lose power after exceeding the maximum temperature. Watch out for overheating – high temperature can irreversibly damage this product. As the temperature rises, the magnet's force temporarily decreases. Do not use this product in hot environments exceeding its operating temperature limit. Exceeding the critical threshold will lead to permanent loss of magnetism.

*Important note: Heat tolerance is determined by both grade, and the Permeance Coefficient Pc. Flat magnets (low permeance coefficient) may lose charge permanently at lower temperatures than long magnets. The danger warning in the table signals permanent field degradation for this particular item.

Table 6: Magnet-Magnet interaction (repulsion) - field collision
MW 8x8 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	9.48 kg / 9481 g 93.0 N 6 000 Gs	N/A
1 mm	7.26 kg / 7262 g 71.2 N 9 682 Gs	6.54 kg / 6536 g 64.1 N ~0 Gs
2 mm	5.37 kg / 5368 g 52.7 N 8 324 Gs	4.83 kg / 4831 g 47.4 N ~0 Gs
3 mm	3.88 kg / 3877 g 38.0 N 7 074 Gs	3.49 kg / 3489 g 34.2 N ~0 Gs
5 mm	1.95 kg / 1949 g 19.1 N 5 016 Gs	1.75 kg / 1754 g 17.2 N ~0 Gs
10 mm	0.36 kg / 364 g 3.6 N 2 169 Gs	0.33 kg / 328 g 3.2 N ~0 Gs
20 mm	0.03 kg / 27 g 0.3 N 592 Gs	0.02 kg / 24 g 0.2 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 66 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnets interact from a significantly greater distance than a magnet and sheet combination. The connection of two magnets generates a stronger field and a larger range of action. Want to build a strong closure? Apply two magnets instead of one magnet and a striker plate. Exercise caution that when connecting a pair of magnets, the impact force is huge. The repulsion force is a bit weaker than the attraction, but still significant.
*Flux density between like poles reaches ~0 Gs at the geometric center between the magnets (caused by magnetic field nullification).

Table 7: Protective zones (implants) - precautionary measures
MW 8x8 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	5.5 cm
Hearing aid	10 Gs (1.0 mT)	4.0 cm
Timepiece	20 Gs (2.0 mT)	3.5 cm
Mobile device	40 Gs (4.0 mT)	2.5 cm
Car key	50 Gs (5.0 mT)	2.5 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 IT equipment as well as pacemakers. These magnets produce a field that destroys function of sensitive medical devices. Notice: the invisible magnetic field acts through matter and plastic. Exceptional care must be taken by people with cochlear implants and drug dispensers. The risk also applies to: automatic timepieces, car keys, membranes, and displays. Avoid contact with magnetic cards, hard drives, or sensitive navigation tools.

Table 8: Impact energy (cracking risk) - warning
MW 8x8 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	26.19 km/h (7.28 m/s)	0.08 J
30 mm	45.29 km/h (12.58 m/s)	0.24 J
50 mm	58.47 km/h (16.24 m/s)	0.40 J
100 mm	82.68 km/h (22.97 m/s)	0.80 J

Magnetic elements are delicate – a violent impact against metal causes immediate chipping. Pay attention to connection velocity – a magnet released freely speeds with massive force. Striking energy can destroy the magnet or injury to fingers. Hold the magnet firmly during mounting so it doesn't slam with momentum against the metal. A collision at high speed means shattering of the magnet. Use safety goggles when working with large magnets.

Table 9: Corrosion resistance
MW 8x8 / 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. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Design data (Pc)
MW 8x8 / N38

Parameter	Value	Jedn. SI / Opis
Strumień (Flux)	2 868 Mx	28.7 µWb
Współczynnik Pc	0.89	Wysoki (Stabilny)

Total magnetic flux emitted by the magnet pole. Key data for generator builders and Hall effect devices. Pc Factor defines the working geometry.

Table 11: Physics of underwater searching
MW 8x8 / N38

Environment	Effective steel pull	Effect
Air (land)	2.03 kg	Standard
Water (riverbed)	2.32 kg (+0.29 kg Buoyancy gain)	+14.5%

Corrosion warning: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!

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

*Warning: On a vertical surface, the magnet holds merely approx. 20-30% of its nominal pull.

2. Steel thickness impact

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

3. Heat tolerance

*For standard magnets, the critical limit is 80°C.

Quick Unit Converter

Pulling Force

Kilograms (kg)

Newtons (N)

Force in lbs

Field Strength

Induction (Gs)

Tesla (T)

Input a figure in a single field to generate results for the other units at once.

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AM lina fi 10 mm - magnetic accessories

1.476 ZŁ brutto / pcs

The offered product is a very strong rod magnet, composed of modern NdFeB material, which, at dimensions of Ø8x8 mm, guarantees maximum efficiency. This specific item boasts an accuracy of ±0.1mm and industrial build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with impressive force (approx. 2.03 kg), this product is available off-the-shelf from our European logistics center, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in standard operating conditions, ensuring an aesthetic appearance and durability for years.

This model is ideal for building electric motors, advanced sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 19.92 N with a weight of only 3.02 g, this rod is indispensable in electronics and wherever low weight is crucial.

Due to the delicate structure of the ceramic sinter, we absolutely advise against force-fitting (so-called press-fit), as this risks immediate cracking of this precision component. To ensure long-term durability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing high repeatability of the connection.

Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and high resistance to demagnetization. If you need even stronger magnets in the same volume (Ø8x8), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.

This model is characterized by dimensions Ø8x8 mm, which, at a weight of 3.02 g, makes it an element with high magnetic energy density. The key parameter here is the lifting capacity amounting to approximately 2.03 kg (force ~19.92 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against oxidation, giving it an aesthetic, silvery shine.

Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 8 mm. 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.

Pros as well as cons of neodymium magnets.

Strengths

Apart from their strong holding force, neodymium magnets have these key benefits:

They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
They do not lose their magnetic properties even under external field action,
The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to look better,
The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Thanks to versatility in forming and the capacity to modify to unusual requirements,
Wide application in advanced technology sectors – they are utilized in data components, electric drive systems, precision medical tools, also technologically advanced constructions.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets: tips and applications.

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
Limited possibility of creating threads in the magnet and complex forms - recommended is a housing - magnet mounting.
Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to complicate diagnosis medical when they are in the body.
With mass production the cost of neodymium magnets is economically unviable,

Holding force characteristics

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

Magnet power was determined for optimal configuration, including:

with the application of a yoke made of special test steel, ensuring full magnetic saturation
with a cross-section no less than 10 mm
with an ideally smooth contact surface
with zero gap (no impurities)
under axial application of breakaway force (90-degree angle)
at standard ambient temperature

Lifting capacity in practice – influencing factors

Bear in mind that the magnet holding may be lower subject to the following factors, in order of importance:

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of maximum force).
Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
Steel type – mild steel gives the best results. Alloy admixtures lower magnetic properties and holding force.
Surface condition – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
Operating temperature – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate reduces the holding force.

Warnings

Bodily injuries

Danger of trauma: The pulling power is so immense that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Beware of splinters

Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Allergy Warning

Certain individuals experience a contact allergy to nickel, which is the standard coating for NdFeB magnets. Prolonged contact might lead to an allergic reaction. We recommend use protective gloves.

Magnetic interference

Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Implant safety

For implant holders: Strong magnetic fields disrupt medical devices. Maintain at least 30 cm distance or ask another person to work with the magnets.

Electronic devices

Avoid bringing magnets near a wallet, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Do not give to children

These products are not suitable for play. Eating several magnets may result in them connecting inside the digestive tract, which poses a critical condition and requires urgent medical intervention.

Powerful field

Handle magnets with awareness. Their immense force can shock even experienced users. Be vigilant and do not underestimate their force.

Demagnetization risk

Do not overheat. Neodymium magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Do not drill into magnets

Powder generated during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

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

MW 8x8 / N38 - cylindrical magnet

Hunting for a discount?

MW 8x8 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical analysis of the product - data

1. Sliding resistance

2. Steel thickness impact

3. Heat tolerance

Pulling Force

Field Strength

Other proposals

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NCM 15x13.5x5 / N38 - channel magnetic holder

AM lina fi 10 mm - magnetic accessories

Pros as well as cons of neodymium magnets.

Strengths

Weaknesses

Holding force characteristics

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

Lifting capacity in practice – influencing factors

Bodily injuries

Beware of splinters

Allergy Warning

Magnetic interference

Implant safety

Electronic devices

Do not give to children

Powerful field

Demagnetization risk

Do not drill into magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C