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MW 8x5 / 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: PLN 1-6500
Rating: 5

cylindrical magnet

Catalog no 010105

GTIN/EAN: 5906301811046

5.00

Diameter Ø

8 mm [±0,1 mm]

Height

5 mm [±0,1 mm]

Weight

1.88 g

Magnetization Direction

↑ axial

Load capacity

2.17 kg / 21.31 N

Magnetic Induction

483.41 mT / 4834 Gs

Coating

[NiCuNi] Nickel

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Detailed specification - MW 8x5 / N38 - cylindrical magnet

Specification / characteristics - MW 8x5 / N38 - cylindrical magnet

properties

properties	values
Cat. no.	010105
GTIN/EAN	5906301811046
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	5 mm [±0,1 mm]
Weight	1.88 g
Magnetization Direction	↑ axial
Load capacity ~ ?	2.17 kg / 21.31 N
Magnetic Induction ~ ?	483.41 mT / 4834 Gs
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 8x5 / 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

Engineering analysis of the assembly - report

Presented data represent the outcome of a physical simulation. Values are based on algorithms for the material Nd₂Fe₁₄B. Real-world performance might slightly differ. Use these data as a reference point during assembly planning.

Table 1: Static pull force (pull vs gap) - characteristics
MW 8x5 / N38

Distance (mm)	Induction (Gauss) / mT	Pull Force (kg)	Risk Status
0 mm	4830 Gs 483.0 mT	2.17 kg / 2170.0 g 21.3 N	medium risk
1 mm	3655 Gs 365.5 mT	1.24 kg / 1242.8 g 12.2 N	safe
2 mm	2610 Gs 261.0 mT	0.63 kg / 633.9 g 6.2 N	safe
3 mm	1825 Gs 182.5 mT	0.31 kg / 310.0 g 3.0 N	safe
5 mm	915 Gs 91.5 mT	0.08 kg / 77.9 g 0.8 N	safe
10 mm	234 Gs 23.4 mT	0.01 kg / 5.1 g 0.1 N	safe
15 mm	89 Gs 8.9 mT	0.00 kg / 0.7 g 0.0 N	safe
20 mm	43 Gs 4.3 mT	0.00 kg / 0.2 g 0.0 N	safe
30 mm	14 Gs 1.4 mT	0.00 kg / 0.0 g 0.0 N	safe
50 mm	3 Gs 0.3 mT	0.00 kg / 0.0 g 0.0 N	safe

Magnetic force weakens drastically per each millimeter of spacing. Keep in mind that even a microscopic distance (e.g., dirt, varnish, dust) significantly diminishes the holding power. Magnetic products work most effectively during direct contact; distance kills the power. Analyze how quickly the pull force fall, when the magnet does not touch tightly to the steel surface. When planning the assembly, eliminate unnecessary gaps.

Table 2: Sliding force (wall)
MW 8x5 / N38

Distance (mm)	Friction coefficient	Pull Force (kg)
0 mm	Stal (~0.2)	0.43 kg / 434.0 g 4.3 N
1 mm	Stal (~0.2)	0.25 kg / 248.0 g 2.4 N
2 mm	Stal (~0.2)	0.13 kg / 126.0 g 1.2 N
3 mm	Stal (~0.2)	0.06 kg / 62.0 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 table below presents the theoretical shear load needed to cause the slippage of the magnet downwards along a upright steel wall (assuming standard friction coefficient). This parameter is relative to the air gap between the magnet and the surface.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 8x5 / N38

Surface type	Friction coefficient / % Mocy	Max load (kg)
Raw steel	µ = 0.3 30% Nominalnej Siły	0.65 kg / 651.0 g 6.4 N
Painted steel (standard)	µ = 0.2 20% Nominalnej Siły	0.43 kg / 434.0 g 4.3 N
Oily/slippery steel	µ = 0.1 10% Nominalnej Siły	0.22 kg / 217.0 g 2.1 N
Magnet with anti-slip rubber	µ = 0.5 50% Nominalnej Siły	1.09 kg / 1085.0 g 10.6 N

When mounting a holder on a vertical plane (e.g., a car body), it will maintain barely approx. 20%-30% of its maximum pull force. Gravity and a low friction coefficient mean that products slip faster than they detach. Planning a wall mount? Remember that the shear force is much weaker than the maximum static pull force. On a slippery surface, the magnet will slip down under a much lighter weight. Using a rubber pad can effectively raise the stability.

Table 4: Steel thickness (saturation) - sheet metal selection
MW 8x5 / N38

Steel thickness (mm)	% power	Real pull force (kg)
0.5 mm	10%	0.22 kg / 217.0 g 2.1 N
1 mm	25%	0.54 kg / 542.5 g 5.3 N
2 mm	50%	1.09 kg / 1085.0 g 10.6 N
5 mm	100%	2.17 kg / 2170.0 g 21.3 N
10 mm	100%	2.17 kg / 2170.0 g 21.3 N

A thin sheet cannot take in the full magnetic flux, which squanders power of the holder. Should you mount a strong magnet to a weak sheet, the flux will penetrate right through and the attraction force will be weaker. To achieve 100% of this neodymium's potential, you require a sufficiently solid piece of metal. The material oversaturation means that on thin elements (e.g., thin profiles), the holder holds weaker. We suggest choosing the steel cross-section according to the table below.

Table 5: Thermal stability (stability) - resistance threshold
MW 8x5 / N38

Ambient temp. (°C)	Power loss	Remaining pull	Status
20 °C	0.0%	2.17 kg / 2170.0 g 21.3 N	OK
40 °C	-2.2%	2.12 kg / 2122.3 g 20.8 N	OK
60 °C	-4.4%	2.07 kg / 2074.5 g 20.4 N	OK
80 °C	-6.6%	2.03 kg / 2026.8 g 19.9 N
100 °C	-28.8%	1.55 kg / 1545.0 g 15.2 N

Ordinary NdFeB products lose strength after exceeding the maximum temperature. Watch out for overheating – high temperature can permanently damage this magnet. As the temperature rises, the neodymium's capacity briefly decreases. Refrain from using this product close to heaters exceeding its working range. Too high temperature will lead to permanent loss of magnetic properties.

*Technical advisory: Temperature resistance depends not only on the material grade, but also on the magnet's shape. Thin magnets (low permeance coefficient) risk losing magnetic properties under lower heat stress than taller cylinders. Warning indicator in the table indicates permanent field degradation for this particular item.

Table 6: Two magnets (attraction) - field range
MW 8x5 / N38

Gap (mm)	Attraction (kg) (N-S)	Repulsion (kg) (N-N)
0 mm	7.23 kg / 7228 g 70.9 N 5 742 Gs	N/A
1 mm	5.58 kg / 5585 g 54.8 N 8 490 Gs	5.03 kg / 5026 g 49.3 N ~0 Gs
2 mm	4.14 kg / 4140 g 40.6 N 7 310 Gs	3.73 kg / 3726 g 36.6 N ~0 Gs
3 mm	2.98 kg / 2984 g 29.3 N 6 207 Gs	2.69 kg / 2686 g 26.3 N ~0 Gs
5 mm	1.48 kg / 1479 g 14.5 N 4 369 Gs	1.33 kg / 1331 g 13.1 N ~0 Gs
10 mm	0.26 kg / 260 g 2.5 N 1 830 Gs	0.23 kg / 234 g 2.3 N ~0 Gs
20 mm	0.02 kg / 17 g 0.2 N 468 Gs	0.02 kg / 15 g 0.1 N ~0 Gs
50 mm	0.00 kg / 0 g 0.0 N 47 Gs	0.00 kg / 0 g 0.0 N ~0 Gs

Two magnets interact from a wider radius than a magnet and steel combination. The connection of two magnets produces a massive flux and a wider radius of action. Want to build a strong closure? Apply two magnets instead of a neodymium and a steel. Be careful that when attracting two neodymiums, the pinch force is massive. The levitation is a bit weaker than the attraction, but still impressive.
*Field value in repulsion mode drops to ~0 Gs at the midpoint between the magnets (due to field cancellation).

Table 7: Hazards (electronics) - warnings
MW 8x5 / N38

Object / Device	Limit (Gauss) / mT	Safe distance
Pacemaker	5 Gs (0.5 mT)	4.5 cm
Hearing aid	10 Gs (1.0 mT)	3.5 cm
Mechanical watch	20 Gs (2.0 mT)	3.0 cm
Mobile device	40 Gs (4.0 mT)	2.5 cm
Remote	50 Gs (5.0 mT)	2.0 cm
Payment card	400 Gs (40.0 mT)	1.0 cm
HDD hard drive	600 Gs (60.0 mT)	1.0 cm

Powerful magnet radiation poses a serious hazard to electronics and medical implants. These NdFeB products generate a field that disrupts operation of digital equipment. Notice: the unseen radiation penetrates the body and housings. Increased vigilance must be exercised by people with cochlear implants and insulin pumps. Also at risk are: automatic timepieces, car keys, membranes, and screens. Do not bring the product near payment cards, HDD media, or sensitive navigation tools.

Table 8: Dynamics (cracking risk) - collision effects
MW 8x5 / N38

Start from (mm)	Speed (km/h)	Energy (J)
10 mm	34.31 km/h (9.53 m/s)	0.09 J
30 mm	59.35 km/h (16.49 m/s)	0.26 J
50 mm	76.62 km/h (21.28 m/s)	0.43 J
100 mm	108.35 km/h (30.10 m/s)	0.85 J

Magnetic elements are prone to chipping – 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 injury to skin. Hold the magnet firmly during installation so it doesn't slam with momentum against the steel surface. A contact at a velocity of dozens of km/h means shattering of the neodymium. Wear eye protection when handling with large magnets.

Table 9: Anti-corrosion coating durability
MW 8x5 / 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. Moisture resistance is crucial for installations in bathrooms or outdoors.

Table 10: Electrical data (P_c)
MW 8x5 / N38

Parameter	Value	SI Unit / Description
Magnetic Flux	2 450 Mx	24.5 µWb
P_c Coefficient	0.68	High (Stable)

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

Table 11: Submerged application
MW 8x5 / N38

Environment	Effective steel pull	Effect
Air (land)	2.17 kg	Standard
Water (riverbed)	2.48 kg (+0.31 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.

The magnetic field penetrates through water without any losses. As a result, your magnet will pull a heavier object from the bottom than if you lifted it in the air.

1. Vertical hold

*Warning: On a vertical wall, the magnet retains only a fraction of its max power.

2. Efficiency vs thickness

*Thin steel (e.g. 0.5mm PC case) drastically 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) = 0.68

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%

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: 010105-2025

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MW 10x1.5 / N38 - cylindrical magnet

0.431 ZŁ brutto / pcs

This product is an exceptionally strong cylinder magnet, composed of advanced NdFeB material, which, at dimensions of Ø8x5 mm, guarantees optimal power. The MW 8x5 / N38 component features a tolerance of ±0.1mm and professional build quality, making it a perfect solution for professional engineers and designers. As a cylindrical magnet with significant force (approx. 2.17 kg), this product is in stock from our warehouse in Poland, ensuring quick order fulfillment. Furthermore, its triple-layer Ni-Cu-Ni coating secures it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.

It finds application in DIY projects, advanced robotics, and broadly understood industry, serving as a fastening or actuating element. Thanks to the pull force of 21.31 N with a weight of only 1.88 g, this cylindrical magnet is indispensable in miniature devices and wherever low weight is crucial.

Since our magnets have a tolerance of ±0.1mm, the recommended way is to glue them into holes with a slightly larger diameter (e.g., 8.1 mm) using two-component epoxy glues. To ensure long-term durability in industry, anaerobic resins are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.

Grade N38 is the most popular standard for industrial neodymium magnets, offering an optimal price-to-power ratio and operational stability. If you need even stronger magnets in the same volume (Ø8x5), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard in continuous sale in our store.

The presented product is a neodymium magnet with precisely defined parameters: diameter 8 mm and height 5 mm. The key parameter here is the lifting capacity amounting to approximately 2.17 kg (force ~21.31 N), which, with such defined 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.

This rod magnet is magnetized axially (along the height of 5 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 through the diameter if your project requires it.

Pros and cons of Nd₂Fe₁₄B magnets.

Benefits

Besides their high retention, neodymium magnets are valued for these benefits:

They do not lose power, even over around ten years – the drop in power is only ~1% (based on measurements),
Neodymium magnets are characterized by exceptionally resistant to loss of magnetic properties caused by magnetic disturbances,
The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to look better,
Neodymium magnets deliver maximum magnetic induction on a small area, which increases force concentration,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to modularity in forming and the capacity to adapt to specific needs,
Universal use in future technologies – they are utilized in mass storage devices, electric drive systems, medical devices, as well as industrial machines.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Characteristics of disadvantages of neodymium magnets: tips and applications.

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
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
Due to limitations in creating nuts and complex shapes in magnets, we recommend using a housing - magnetic mount.
Possible danger resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these magnets are able to complicate diagnosis medical in case of swallowing.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Magnetic strength at its maximum – what affects it?

Breakaway force is the result of a measurement for the most favorable conditions, including:

on a base made of mild steel, effectively closing the magnetic flux
with a cross-section minimum 10 mm
with an ideally smooth contact surface
without any clearance between the magnet and steel
during pulling in a direction perpendicular to the mounting surface
at temperature room level

Lifting capacity in practice – influencing factors

In real-world applications, the real power results from many variables, presented from most significant:

Distance (between the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, corrosion or debris).
Loading method – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal weaken the grip.
Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was determined using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate reduces the holding force.

Warnings

Beware of splinters

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Health Danger

Patients with a ICD have to maintain an safe separation from magnets. The magnetic field can stop the operation of the life-saving device.

Avoid contact if allergic

A percentage of the population experience a hypersensitivity to nickel, which is the standard coating for NdFeB magnets. Prolonged contact may cause a rash. We strongly advise use safety gloves.

Keep away from electronics

A powerful magnetic field interferes with the operation of magnetometers in phones and GPS navigation. Do not bring magnets close to a smartphone to avoid breaking the sensors.

Machining danger

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

Pinching danger

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.

Permanent damage

Standard neodymium magnets (N-type) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.

Respect the power

Handle magnets consciously. Their huge power can shock even experienced users. Be vigilant and respect their power.

Keep away from children

NdFeB magnets are not toys. Eating several magnets may result in them attracting across intestines, which poses a direct threat to life and requires urgent medical intervention.

Cards and drives

Very strong magnetic fields can erase data on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Warning! More info about risks in the article: Magnet Safety Guide.

MW 8x5 / N38 - cylindrical magnet

Detailed specification - MW 8x5 / N38 - cylindrical magnet

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Engineering analysis of the assembly - report

Table 1: Static pull force (pull vs gap) - characteristics MW 8x5 / N38

Table 2: Sliding force (wall) MW 8x5 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces MW 8x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection MW 8x5 / N38

Table 5: Thermal stability (stability) - resistance threshold MW 8x5 / N38

Table 6: Two magnets (attraction) - field range MW 8x5 / N38

Table 7: Hazards (electronics) - warnings MW 8x5 / N38

Table 8: Dynamics (cracking risk) - collision effects MW 8x5 / N38

Table 9: Anti-corrosion coating durability MW 8x5 / N38

Table 10: Electrical data (Pc) MW 8x5 / N38

Table 11: Submerged application MW 8x5 / N38

1. Vertical hold

2. Efficiency vs thickness

3. Thermal stability

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

Material specification

Environmental data

Force (pull)

Magnetic Induction

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Pros and cons of Nd2Fe14B magnets.

Benefits

Limitations

Holding force characteristics

Magnetic strength at its maximum – what affects it?

Lifting capacity in practice – influencing factors

Warnings

Beware of splinters

Health Danger

Avoid contact if allergic

Keep away from electronics

Machining danger

Pinching danger

Permanent damage

Respect the power

Keep away from children

Cards and drives

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Table 1: Static pull force (pull vs gap) - characteristics
MW 8x5 / N38

Table 2: Sliding force (wall)
MW 8x5 / N38

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 8x5 / N38

Table 4: Steel thickness (saturation) - sheet metal selection
MW 8x5 / N38

Table 5: Thermal stability (stability) - resistance threshold
MW 8x5 / N38

Table 6: Two magnets (attraction) - field range
MW 8x5 / N38

Table 7: Hazards (electronics) - warnings
MW 8x5 / N38

Table 8: Dynamics (cracking risk) - collision effects
MW 8x5 / N38

Table 9: Anti-corrosion coating durability
MW 8x5 / N38

Table 10: Electrical data (P_c)
MW 8x5 / N38

Table 11: Submerged application
MW 8x5 / N38

Pros and cons of Nd₂Fe₁₄B magnets.