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MW 8x1.5 / 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: 1-6500
Rating: 5

cylindrical magnet

Catalog no 010101

GTIN/EAN: 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/EAN	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	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

Technical modeling of the magnet - report

These information constitute the result of a engineering simulation. Results are based on models for the material Nd₂Fe₁₄B. Operational parameters may differ. Treat these data as a supplementary guide for designers.

Table 1: Static force (force vs gap) - power drop
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	safe
1 mm	1782 Gs 178.2 mT	0.50 kg / 497.3 g 4.9 N	safe
2 mm	1310 Gs 131.0 mT	0.27 kg / 268.7 g 2.6 N	safe
3 mm	914 Gs 91.4 mT	0.13 kg / 130.8 g 1.3 N	safe
5 mm	439 Gs 43.9 mT	0.03 kg / 30.2 g 0.3 N	safe
10 mm	99 Gs 9.9 mT	0.00 kg / 1.5 g 0.0 N	safe
15 mm	35 Gs 3.5 mT	0.00 kg / 0.2 g 0.0 N	safe
20 mm	16 Gs 1.6 mT	0.00 kg / 0.0 g 0.0 N	safe
30 mm	5 Gs 0.5 mT	0.00 kg / 0.0 g 0.0 N	safe
50 mm	1 Gs 0.1 mT	0.00 kg / 0.0 g 0.0 N	safe

Pulling power decreases sharply with every mm of distance. Note that even a very thin break (e.g., contamination, varnish, veneer) strongly diminishes the holding power. Magnetic products operate most effectively at the point of direct contact; gap kills the force. See how quickly the load capacity drop, when the product does not adhere tightly to the metal substrate. When designing the assembly, avoid unnecessary gaps.

Table 2: Slippage load (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

The table below calculates the estimated holding capacity needed to initiate the sliding of the magnet down along a vertical steel plate (considering typical friction). The holding force depends on the gap size between the magnet and the metal.

Table 3: Vertical assembly (shearing) - behavior on slippery surfaces
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 surface (e.g., a fridge), it you can count on only approx. 20%-30% of nominal attraction strength. Gravitational force and a low friction coefficient mean that products move down easier than they pop off the substrate. Planning a vertical fastening? Note that the shear force is significantly lower than the perpendicular breakaway force. On a painted metal, the magnet will slide down under a noticeably lighter weight. Application of an anti-slip pad can drastically increase the grip.

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 too thin steel is incapable of take in the full magnetic flux, which squanders power of the holder. Should you install a neodymium to a too thin substrate, the flux will pass right through and the pull force will drop sharply. To achieve 100% of this neodymium's potential, you require a sufficiently solid backing of steel. The material oversaturation means that on thin elements (e.g., car bodies), the product shows lower pull force. We suggest choosing the steel cross-section from these parameters.

Table 5: Thermal stability (stability) - resistance threshold
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
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

Ordinary NdFeB products irreversibly lose power above the temperature limit. Protect against heat – excessive heat can permanently damage this magnet. As the temperature rises, the magnet's capacity momentarily lowers. Do not use this magnet close to heaters higher than its safe range. Ignoring the limit will result in irreversible degradation of magnetic properties.

*Important note: Heat tolerance depends not only on the material grade, as well as the dimension ratios. Flat magnets (pancake types) are more susceptible to demagnetization under lower heat stress than long magnets. Warning indicator in the table indicates a risk of irreversible loss for this particular item.

Table 6: Two magnets (attraction) - field collision
MW 8x1.5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	1.46 kg / 1465 g 14.4 N 3 712 Gs	N/A
1 mm	1.24 kg / 1244 g 12.2 N 4 007 Gs	1.12 kg / 1120 g 11.0 N ~0 Gs
2 mm	0.98 kg / 984 g 9.7 N 3 565 Gs	0.89 kg / 886 g 8.7 N ~0 Gs
3 mm	0.74 kg / 738 g 7.2 N 3 086 Gs	0.66 kg / 664 g 6.5 N ~0 Gs
5 mm	0.37 kg / 374 g 3.7 N 2 196 Gs	0.34 kg / 336 g 3.3 N ~0 Gs
10 mm	0.06 kg / 60 g 0.6 N 878 Gs	0.05 kg / 54 g 0.5 N ~0 Gs
20 mm	0.00 kg / 3 g 0.0 N 199 Gs	0.00 kg / 0 g 0.0 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 17 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnetic products interact from a much further distance than a magnet and sheet setup. The connection of two magnets creates a more powerful interaction and a further horizon of operation. Want to build a powerful holder? Apply two magnets instead of one magnet and a steel. Exercise caution that when attracting two neodymiums, the impact force is huge. The levitation is marginally weaker than the connection force, but still large.
*The magnetic induction between like poles reaches ~0 Gs in the exact middle between the magnets (caused by magnetic field nullification).

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
Timepiece	20 Gs (2.0 mT)	2.0 cm
Mobile device	40 Gs (4.0 mT)	1.5 cm
Car key	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

A strong magnetic field is a serious hazard to electronic devices as well as medical implants. These NdFeB products generate a field that destroys function of sensitive medical devices. Notice: the unseen radiation passes through tissues and housings. Increased vigilance must be taken by people with cochlear implants and insulin pumps. Also at risk are: mechanical watches, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or precise measuring instruments.

Table 8: Collisions (kinetic energy) - 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

NdFeB products are very brittle – a violent impact against metal can result in shattering. Pay attention to connection velocity – a magnet released freely turns into a projectile. Striking energy can destroy the magnet or dangerous crushing to skin. Hold the magnet firmly during installation so it doesn't hit violently against the steel surface. A contact at a velocity of dozens of km/h almost guarantees destruction of the magnet. Wear eye protection when working with powerful specimens.

Table 9: Corrosion resistance
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. Note the thickness of the protective layer.

Table 10: Electrical data (P_c)
MW 8x1.5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	1 285 Mx	12.9 µWb
P_c Coefficient	0.27	Low (Flat)

Total magnetic flux passing through the magnet pole. Key data in coil applications and motors. The P_c coefficient defines the working geometry.

Table 11: Physics of underwater searching
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: Remember to wipe the magnet thoroughly after removing it from water and apply a protective layer (e.g., oil) to avoid corrosion.

Contrary to myths, water does not block the magnetic field. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Wall mount (shear)

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

2. Steel thickness impact

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

3. Power loss vs temp

*For N38 grade, 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) = 0.27

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

Material specification

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

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: 010101-2025

Magnet Unit Converter

Magnet pull force

Kilograms (kg)

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Gauss (Gs)

Enter data in one of the inputs, and the remaining units change in real-time.

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UMC 32x11/3x8 / N38 - cylindrical magnetic holder

17.98 ZŁ brutto / pcs

The presented product is an extremely powerful cylindrical magnet, produced from modern NdFeB material, which, at dimensions of Ø8x1.5 mm, guarantees optimal power. The MW 8x1.5 / N38 model is characterized by high dimensional repeatability and industrial build quality, making it an ideal solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 0.74 kg), this product is in stock from our warehouse in Poland, ensuring rapid order fulfillment. Additionally, its triple-layer Ni-Cu-Ni coating shields it against corrosion in typical operating conditions, ensuring an aesthetic appearance and durability for years.

It successfully proves itself in DIY projects, advanced automation, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 7.27 N with a weight of only 0.57 g, this rod is indispensable in miniature devices 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 chipping the coating of this professional component. To ensure stability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing high repeatability of the connection.

Magnets NdFeB grade N38 are suitable for the majority of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger 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 holding force amounting to approximately 0.74 kg (force ~7.27 N), which, with such defined dimensions, proves the high grade of the NdFeB material. The product has a [NiCuNi] coating, which secures it against external factors, 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.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Advantages

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

They do not lose power, even during nearly 10 years – the reduction in lifting capacity is only ~1% (based on measurements),
They retain their magnetic properties even under external field action,
The use of an elegant layer of noble metals (nickel, gold, silver) causes the element to look better,
Neodymium magnets ensure maximum magnetic induction on a contact point, which ensures high operational effectiveness,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to flexibility in shaping and the ability to modify to unusual requirements,
Key role in advanced technology sectors – they serve a role in computer drives, drive modules, medical equipment, and other advanced devices.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in miniature devices

Disadvantages

Disadvantages of neodymium magnets:

Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
We suggest a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
Potential hazard related to microscopic parts of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Additionally, small components of these products are able to complicate diagnosis medical after entering the body.
With budget limitations the cost of neodymium magnets can be a barrier,

Holding force characteristics

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

The specified lifting capacity refers to the peak performance, obtained under optimal environment, specifically:

using a base made of high-permeability steel, serving as a ideal flux conductor
whose thickness equals approx. 10 mm
characterized by smoothness
with zero gap (without impurities)
under perpendicular force vector (90-degree angle)
at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

In practice, the real power results from several key aspects, presented from the most important:

Distance (between the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
Angle of force application – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly many times smaller (approx. 1/5 of the lifting capacity).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Steel grade – ideal substrate is high-permeability steel. Cast iron may generate lower lifting capacity.
Surface structure – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
Thermal factor – hot environment reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was determined by applying a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.

Safe handling of NdFeB magnets

Shattering risk

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Implant safety

People with a ICD should keep an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.

Fire warning

Machining of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Caution required

Use magnets consciously. Their huge power can shock even professionals. Stay alert and do not underestimate their power.

Keep away from computers

Avoid bringing magnets close to a purse, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.

Product not for children

Always store magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are life-threatening.

Finger safety

Risk of injury: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.

Maximum temperature

Do not overheat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Threat to navigation

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Nickel coating and allergies

Certain individuals have a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching can result in a rash. We strongly advise wear protective gloves.

Caution! Want to know more? Check our post: Why are neodymium magnets dangerous?

MW 8x1.5 / N38 - cylindrical magnet

Want to talk magnets?

MW 8x1.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Technical modeling of the magnet - report

1. Wall mount (shear)

2. Steel thickness impact

3. Power loss vs temp

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

Material specification

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Field

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UMC 32x11/3x8 / N38 - cylindrical magnetic holder

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Disadvantages

Holding force characteristics

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

Practical lifting capacity: influencing factors

Shattering risk

Implant safety

Fire warning

Caution required

Keep away from computers

Product not for children

Finger safety

Maximum temperature

Threat to navigation

Nickel coating and allergies

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.