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MW 8x1.5 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010101

GTIN: 5906301811008

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

1.5 mm [±0,1 mm]

Weight

0.57 g

Magnetization Direction

↑ axial

Load capacity

0.74 kg / 7.27 N

Magnetic Induction

217.52 mT / 2175 Gs

Coating

[NiCuNi] Nickel

0.455 ZŁ with VAT / pcs + price for transport

0.370 ZŁ net + 23% VAT / pcs

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MW 8x1.5 / N38 - cylindrical magnet

Specification / characteristics MW 8x1.5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010101
GTIN	5906301811008
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	1.5 mm [±0,1 mm]
Weight	0.57 g
Magnetization Direction	↑ axial
Load capacity ~ ?	0.74 kg / 7.27 N
Magnetic Induction ~ ?	217.52 mT / 2175 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x1.5 / 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

Physical analysis of the product - technical parameters

Presented information are the direct effect of a physical simulation. Results rely on algorithms for the class NdFeB. Actual performance might slightly differ. Use these calculations as a reference point when designing systems.

Table 1: Static pull force (pull vs gap) - characteristics
MW 8x1.5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	2174 Gs 217.4 mT	0.74 kg / 740.0 g 7.3 N	weak grip
1 mm	1782 Gs 178.2 mT	0.50 kg / 497.3 g 4.9 N	weak grip
2 mm	1310 Gs 131.0 mT	0.27 kg / 268.7 g 2.6 N	weak grip
3 mm	914 Gs 91.4 mT	0.13 kg / 130.8 g 1.3 N	weak grip
5 mm	439 Gs 43.9 mT	0.03 kg / 30.2 g 0.3 N	weak grip
10 mm	99 Gs 9.9 mT	0.00 kg / 1.5 g 0.0 N	weak grip
15 mm	35 Gs 3.5 mT	0.00 kg / 0.2 g 0.0 N	weak grip
20 mm	16 Gs 1.6 mT	0.00 kg / 0.0 g 0.0 N	weak grip
30 mm	5 Gs 0.5 mT	0.00 kg / 0.0 g 0.0 N	weak grip
50 mm	1 Gs 0.1 mT	0.00 kg / 0.0 g 0.0 N	weak grip

Pulling power drops sharply with every subsequent millimeter of gap. Note that even the smallest gap (e.g., contamination, paint, dust) strongly weakens the grip. Magnetic products operate strongest during direct contact; distance weakens the force. Notice how flashily the parameters plummet, when the magnet does not touch flatly to the metal substrate. When calculating the arrangement, avoid unnecessary gaps.

Table 2: Shear Capacity (Vertical Surface)
MW 8x1.5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.15 kg / 148.0 g 1.5 N
1 mm	Stal (~0.2)	0.10 kg / 100.0 g 1.0 N
2 mm	Stal (~0.2)	0.05 kg / 54.0 g 0.5 N
3 mm	Stal (~0.2)	0.03 kg / 26.0 g 0.3 N
5 mm	Stal (~0.2)	0.01 kg / 6.0 g 0.1 N
10 mm	Stal (~0.2)	0.00 kg / 0.0 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

This section defines the estimated force necessary to initiate the sliding of the magnet vertically against a vertical steel wall (considering typical friction coefficient). This parameter depends on the air gap between the magnet and the surface.

Table 3: Wall mounting (shearing) - vertical pull
MW 8x1.5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.22 kg / 222.0 g 2.2 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.15 kg / 148.0 g 1.5 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.07 kg / 74.0 g 0.7 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	0.37 kg / 370.0 g 3.6 N

When placing a magnet on a vertical wall (e.g., a car body), it you can count on only about 20%-30% of nominal attraction strength. Gravitational force as well as a low friction coefficient influence the fact that products slip faster than they pull off. Want to create a wall mount? Remember that the shear force is significantly lower than the maximum static pull force. On a smooth steel, the element will give way down under a significantly smaller weight. Application of an anti-slip pad can drastically improve the result.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 8x1.5 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.07 kg / 74.0 g 0.7 N
1 mm	25%	0.19 kg / 185.0 g 1.8 N
2 mm	50%	0.37 kg / 370.0 g 3.6 N
5 mm	100%	0.74 kg / 740.0 g 7.3 N
10 mm	100%	0.74 kg / 740.0 g 7.3 N

A thin metal plate cannot absorb the full magnetic flux, which squanders power of the holder. Should you install a neodymium to a too thin substrate, the magnetism will penetrate right through and the holding will be smaller. To utilize the maximum of this neodymium's power, you need a suitably thick piece of steel. The material oversaturation means that on delicate walls (e.g., car bodies), the product works worse. We suggest choosing the steel dimension from these parameters.

Table 5: Working in heat (stability) - thermal limit
MW 8x1.5 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	0.74 kg / 740.0 g 7.3 N	OK
40 °C	-2.2%	0.72 kg / 723.7 g 7.1 N	OK
60 °C	-4.4%	0.71 kg / 707.4 g 6.9 N	OK
80 °C	-6.6%	0.69 kg / 691.2 g 6.8 N
100 °C	-28.8%	0.53 kg / 526.9 g 5.2 N

Classic neodymiums change their properties strength after exceeding the maximum temperature. Avoid high temperatures – excessive heat can permanently damage this product. As the temperature rises, the magnet's capacity briefly decreases. Avoid using this magnet close to heaters higher than its safe range. Ignoring the limit will lead to destruction of magnetism.

Table 6: Two magnets (repulsion) - forces in the system
MW 8x1.5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	1.11 kg / 1110.0 g 10.9 N	N/A
2 mm	0.41 kg / 405.0 g 4.0 N	0.38 kg / 378.0 g 3.7 N
5 mm	0.05 kg / 45.0 g 0.4 N	0.04 kg / 42.0 g 0.4 N
10 mm	0.00 kg / 0.0 g 0.0 N	0.00 kg / 0.0 g 0.0 N
20 mm	0.00 kg / 0.0 g 0.0 N	0.00 kg / 0.0 g 0.0 N
50 mm	0.00 kg / 0.0 g 0.0 N	0.00 kg / 0.0 g 0.0 N

Two magnets attract each other from a wider radius than a magnet and steel setup. The setup of magnet-to-magnet creates a more powerful interaction and a wider radius of operation. Designing a solid fastener? Use a pair of magnets instead of a neodymium and a steel. Remember that when bringing together two magnets, the pinch force is massive. The repulsion force is slightly lower than the attraction, but still impressive.

Table 7: Safety (HSE) (electronics) - precautionary measures
MW 8x1.5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	3.0 cm
Hearing aid	10 Gs (1.0 mT)	2.5 cm
Mechanical watch	20 Gs (2.0 mT)	2.0 cm
Mobile device	40 Gs (4.0 mT)	1.5 cm
Remote	50 Gs (5.0 mT)	1.5 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	0.5 cm

Powerful magnet radiation is a serious hazard to IT equipment and medical implants. These magnets produce a flux that prevents correct functioning of sensitive medical devices. Notice: the unseen radiation passes through tissues and plastic. Special caution must be taken by people with hearing aids and insulin pumps. Also at risk are: automatic timepieces, remotes, speakers, and screens. Do not bring the product near payment cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (cracking risk) - warning
MW 8x1.5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	36.39 km/h (10.11 m/s)	0.03 J
30 mm	62.94 km/h (17.48 m/s)	0.09 J
50 mm	81.25 km/h (22.57 m/s)	0.15 J
100 mm	114.91 km/h (31.92 m/s)	0.29 J

Neodymium magnets are prone to chipping – a collision with steel risks their cracking. Control the attraction moment – a neodymium left loose speeds with massive force. Striking energy can destroy the magnet or injury to skin. Hold the magnet firmly during installation so it doesn't hit violently against the steel surface. A collision at high speed ends with a crack of the neodymium. Wear eye protection when working with powerful specimens.

Table 9: Surface protection spec
MW 8x1.5 / 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: Underwater work (magnet fishing)
MW 8x1.5 / N38

Environment	Effective steel pull	Effect
Air (land)	0.74 kg	Standard
Water (riverbed)	0.85 kg (+0.11 kg Buoyancy gain)	+14.5%

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

In water, the magnet feels stronger thanks to Archimedes' principle. However, remember the water resistance when pulling the rope quickly.

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UMT 11x17 colorless / N38 - board holder

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This product is an exceptionally strong cylinder magnet, made from modern NdFeB material, which, with dimensions of Ø8x1.5 mm, guarantees optimal power. The MW 8x1.5 / N38 component boasts high dimensional repeatability and industrial build quality, making it an ideal solution for the most demanding engineers and designers. As a magnetic rod with significant force (approx. 0.74 kg), this product is available off-the-shelf from our warehouse in Poland, ensuring quick order fulfillment. Additionally, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is perfect for building electric motors, advanced sensors, and efficient filters, where field concentration on a small surface counts. Thanks to the high power of 7.27 N with a weight of only 0.57 g, this rod is indispensable in electronics and wherever every gram matters.

Due to the brittleness of the NdFeB material, you must not use force-fitting (so-called press-fit), as this risks chipping the coating of this professional component. To ensure stability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most frequently chosen standard for industrial neodymium magnets, offering a great economic balance and operational stability. If you need the strongest magnets in the same volume (Ø8x1.5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 8 mm and height 1.5 mm. The key parameter here is the lifting capacity amounting to approximately 0.74 kg (force ~7.27 N), which, with such compact dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which protects the surface 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. Such an arrangement is standard 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 through the diameter if your project requires it.

Advantages as well as disadvantages of neodymium magnets.

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:

They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
They possess excellent resistance to magnetism drop when exposed to external magnetic sources,
By applying a shiny layer of nickel, the element acquires an nice look,
Magnets exhibit impressive magnetic induction on the surface,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Possibility of detailed creating and modifying to specific conditions,
Wide application in future technologies – they are commonly used in magnetic memories, electromotive mechanisms, diagnostic systems, also multitasking production systems.
Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Drawbacks and weaknesses of neodymium magnets: application proposals

Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a steel housing, which not only secures them against impacts but also increases their durability
When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding 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 stable to moisture, when using outdoors
We suggest cover - magnetic mount, due to difficulties in creating threads inside the magnet and complicated shapes.
Possible danger resulting from small fragments of magnets are risky, if swallowed, which gains importance in the context of child health protection. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical after entering the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Maximum lifting force for a neodymium magnet – what affects it?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:

using a sheet made of high-permeability steel, serving as a ideal flux conductor
possessing a thickness of min. 10 mm to avoid saturation
with a plane cleaned and smooth
without any clearance between the magnet and steel
under vertical force direction (90-degree angle)
at conditions approx. 20°C

Key elements affecting lifting force

During everyday use, the actual holding force results from several key aspects, presented from the most important:

Distance – the presence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
Load vector – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
Plate thickness – insufficiently thick steel does not accept the full field, causing part of the power to be wasted into the air.
Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

* Lifting capacity was measured by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Additionally, even a small distance {between} the magnet’s surface and the plate lowers the load capacity.

Safety rules for work with neodymium magnets

Do not drill into magnets

Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Power loss in heat

Monitor thermal conditions. Heating the magnet to high heat will ruin its magnetic structure and pulling force.

Life threat

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

Magnet fragility

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Immense force

Use magnets consciously. Their powerful strength can surprise even professionals. Be vigilant and respect their power.

Swallowing risk

Strictly keep magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.

Crushing risk

Large magnets can crush fingers instantly. Do not place your hand between two attracting surfaces.

GPS Danger

Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a separation from your phone, device, and GPS.

Protect data

Powerful magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Allergy Warning

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, avoid touching magnets with bare hands and choose versions in plastic housing.

Attention!

Looking for details? Check our post: Why are neodymium magnets dangerous?

MW 8x1.5 / N38 - cylindrical magnet

MW 8x1.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical analysis of the product - technical parameters

See more proposals

SMZR 25x150 / N52 - magnetic separator with handle

MPL 40x10x4x2[7/3.5] / N38 - lamellar magnet

MW 50x20 / N38 - cylindrical magnet

UMT 11x17 colorless / N38 - board holder

Advantages as well as disadvantages of neodymium magnets.

Maximum lifting force for a neodymium magnet – what affects it?

Key elements affecting lifting force

Safety rules for work with neodymium magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C