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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

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Technical parameters - 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

Physical simulation of the product - report

These values are the result of a mathematical simulation. Results are based on models for the class Nd₂Fe₁₄B. Operational performance might slightly differ from theoretical values. Use these calculations as a reference point during assembly planning.

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

Pulling power drops significantly per each millimeter of spacing. Remember that even the smallest gap (e.g., dirt, paint, veneer) strongly diminishes the holding power. Magnets work strongest at the point of direct contact; air break nullifies the power. Analyze how quickly the load capacity drop, when the magnet does not touch tightly to the metal substrate. When designing the mounting, eliminate redundant distances.

Table 2: Vertical hold (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 following data calculates the approximate weight limit needed to cause the downward movement of the magnet downwards against a upright metal surface (considering typical friction). This parameter is relative to the air gap between the magnet and the metal.

Table 3: Vertical assembly (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 fridge), it you can count on just approx. 20%-30% of its nominal power. Gravity as well as a weak degree of grip influence the fact that holders move down easier than they detach. Planning a wall mount? Remember that the sliding force is much weaker than the maximum static pull force. On a slippery surface, the holder will slide down under a noticeably lighter load. Using a rubber layer can effectively improve the result.

Table 4: Steel thickness (substrate influence) - 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 sheet is incapable of conduct the entire magnetic field, which weakens actual performance of the holder. If you mount a strong magnet 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 potential, you need a suitably thick piece of metal. The saturation phenomenon causes that on sheet metal structures (e.g., thin profiles), the product works worse. We advise picking the steel dimension from these parameters.

Table 5: Thermal stability (material behavior) - power drop
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

Standard neodymium magnets change their properties strength after exceeding the maximum temperature. Watch out for overheating – heat can irreversibly demagnetize this magnet. With increasing heat, the neodymium's force temporarily lowers. Avoid using this magnet close to heaters exceeding its working range. Ignoring the limit will result in destruction of magnetic properties.

*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (low Pc) risk losing magnetic properties sooner than taller cylinders. Warning indicator in the table signals a risk of irreversible loss for this specific geometry.

Table 6: Two magnets (attraction) - field range
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 magnets interact from a significantly greater distance than a magnet and sheet setup. The connection of magnet-to-magnet creates a more powerful interaction and a wider radius of operation. Designing a powerful holder? Utilize two neodymiums instead of a neodymium and a striker plate. Be careful that when connecting a pair of magnets, the collision energy is massive. The repulsion force is marginally weaker than the connection force, but still impressive.
*Flux density in repulsion mode drops to ~0 Gs at the geometric center of the gap (resulting from vector opposition).

Table 7: Protective zones (implants) - 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
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

A strong magnetic field poses a real danger to IT equipment as well as pacemakers. These neodymiums produce a field that destroys function of sensitive medical devices. Be aware: the invisible magnetic field passes through tissues and plastic. Exceptional care must be taken by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, remotes, speakers, and screens. Avoid contact with magnetic cards, hard drives, or precise measuring instruments.

Table 8: Dynamics (kinetic energy) - collision effects
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 very brittle – a strong collision with metal can result in shattering. Watch the impact speed – a magnet released freely speeds with massive force. Impact energy can destroy the magnet or dangerous crushing to skin. Always hold the magnet during installation so it doesn't hit with great force against the steel surface. A collision at high speed ends with a crack of the magnet. Wear safety glasses when working with large magnets.

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)

The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. Improper coating selection is the most common cause of magnet failure over time.

Table 10: Construction data (Flux)
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 emitted by the magnet pole. Essential parameter in coil applications and motors. The P_c coefficient defines the working geometry.

Table 11: Hydrostatics and buoyancy
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%

Warning: 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. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.

1. Vertical hold

*Warning: On a vertical surface, the magnet holds only ~20% of its nominal pull.

2. Steel thickness impact

*Thin steel (e.g. 0.5mm PC case) significantly limits the holding force.

3. Power loss vs temp

*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) = 0.27

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.

Engineering data and GPSR

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

Quick Unit Converter

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UMC 75x11/6x18 / N38 - cylindrical magnetic holder

169.86 ZŁ brutto / pcs

The presented product is an exceptionally strong rod magnet, produced from modern NdFeB material, which, at dimensions of Ø8x1.5 mm, guarantees the highest energy density. This specific item boasts high dimensional repeatability and professional build quality, making it an excellent solution for the most demanding 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 Ni-Cu-Ni coating secures it against corrosion in standard operating conditions, guaranteeing an aesthetic appearance and durability for years.

This model is ideal for building electric motors, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the pull force of 7.27 N with a weight of only 0.57 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 chipping the coating of this professional component. To ensure stability in automation, anaerobic resins are used, which do not react with the nickel coating and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most frequently chosen standard for professional neodymium magnets, offering a great economic balance and high resistance to demagnetization. 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 holding force 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 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 neodymium magnets.

Strengths

Apart from their strong magnetic energy, neodymium magnets have these key benefits:

They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (according to literature),
They maintain their magnetic properties even under strong external field,
Thanks to the glossy finish, the surface of Ni-Cu-Ni, gold, or silver gives an elegant appearance,
Magnetic induction on the top side of the magnet turns out to be extremely intense,
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...
Thanks to versatility in forming and the ability to adapt to client solutions,
Wide application in advanced technology sectors – they are used in mass storage devices, electromotive mechanisms, advanced medical instruments, also modern systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Drawbacks and weaknesses of neodymium magnets: tips and applications.

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
Neodymium magnets decrease their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Limited ability of producing threads in the magnet and complicated forms - preferred is a housing - mounting mechanism.
Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these devices can disrupt the diagnostic process medical in case of swallowing.
Due to expensive raw materials, their price is relatively high,

Lifting parameters

Highest magnetic holding force – what contributes to it?

The load parameter shown represents the maximum value, obtained under ideal test conditions, namely:

using a plate made of high-permeability steel, serving as a circuit closing element
with a thickness minimum 10 mm
with an ideally smooth contact surface
under conditions of gap-free contact (surface-to-surface)
during detachment in a direction perpendicular to the plane
at room temperature

Impact of factors on magnetic holding capacity in practice

In real-world applications, the actual lifting capacity is determined by many variables, listed from most significant:

Distance – the presence of any layer (rust, dirt, gap) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
Surface condition – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
Temperature – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the load capacity is reduced by as much as fivefold. In addition, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets

Fire risk

Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Medical interference

People with a heart stimulator should maintain an absolute distance from magnets. The magnetism can interfere with the functioning of the life-saving device.

Bone fractures

Danger of trauma: The attraction force is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Magnetic interference

A powerful magnetic field negatively affects the operation of magnetometers in phones and navigation systems. Keep magnets near a smartphone to prevent breaking the sensors.

Powerful field

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

Power loss in heat

Monitor thermal conditions. Heating the magnet to high heat will destroy its magnetic structure and strength.

Threat to electronics

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

Allergic reactions

Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If an allergic reaction occurs, cease working with magnets and wear gloves.

Material brittleness

Despite metallic appearance, the material is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Swallowing risk

Product intended for adults. Tiny parts can be swallowed, leading to serious injuries. Store out of reach of children and animals.

Danger! Need more info? Read our article: Are neodymium magnets dangerous?

MW 8x1.5 / N38 - cylindrical magnet

Technical parameters - MW 8x1.5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical simulation of the product - report

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

Table 2: Vertical hold (vertical surface) MW 8x1.5 / N38

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

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

Table 5: Thermal stability (material behavior) - power drop MW 8x1.5 / N38

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

Table 7: Protective zones (implants) - precautionary measures MW 8x1.5 / N38

Table 8: Dynamics (kinetic energy) - collision effects MW 8x1.5 / N38

Table 9: Surface protection spec MW 8x1.5 / N38

Table 10: Construction data (Flux) MW 8x1.5 / N38

Table 11: Hydrostatics and buoyancy MW 8x1.5 / N38

1. Vertical hold

2. Steel thickness impact

3. Power loss vs temp

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

Material specification

Ecology and recycling (GPSR)

Pulling force

Magnetic Field

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UMC 75x11/6x18 / N38 - cylindrical magnetic holder

Strengths as well as weaknesses of neodymium magnets.

Strengths

Disadvantages

Lifting parameters

Highest magnetic holding force – what contributes to it?

Impact of factors on magnetic holding capacity in practice

Safe handling of NdFeB magnets

Fire risk

Medical interference

Bone fractures

Magnetic interference

Powerful field

Power loss in heat

Threat to electronics

Allergic reactions

Material brittleness

Swallowing risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

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

Table 2: Vertical hold (vertical surface)
MW 8x1.5 / N38

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

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

Table 5: Thermal stability (material behavior) - power drop
MW 8x1.5 / N38

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

Table 7: Protective zones (implants) - precautionary measures
MW 8x1.5 / N38

Table 8: Dynamics (kinetic energy) - collision effects
MW 8x1.5 / N38

Table 9: Surface protection spec
MW 8x1.5 / N38

Table 10: Construction data (Flux)
MW 8x1.5 / N38

Table 11: Hydrostatics and buoyancy
MW 8x1.5 / N38